Toyota Avalon (XX50): Blind Spot Monitor System(for Gasoline Model)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Blind Spot Monitor System(for Gasoline Model)

Buzzer does not Sound

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.
Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK RCTA BUZZER (BLIND SPOT MONITOR BUZZER)

(a) Check that the RCTA buzzer (blind spot monitor buzzer) sounds when the initial check is performed.

Click here

OK:

RCTA buzzer sounds

REPLACE BLIND SPOT MONITOR SENSOR LH

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

GO TO DTC CHART

3.	CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BLIND SPOT MONITOR SENSOR LH)

(a) Disconnect the K22 RCTA buzzer (blind spot monitor buzzer) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
K22-1 (BZP) - Body ground	Engine Switch on (IG)	11 to 14 V
K22-2 (BZN) or P6-3 (BUZ) - Body ground		Below 1 V
K22-2 (BZN) - K22-1 (BZP)		Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BLIND SPOT MONITOR SENSOR LH AND BATTERY)

(a) Disconnect the K22 RCTA buzzer (blind spot monitor buzzer) connector.

(b) Disconnect the P6 blind spot monitor sensor LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K22-2 (BZN) - P6-3 (BUZ)	Always	Below 1 Ω
K22-2 (BZN) or P6-3 (BUZ) - Body ground	Always	10 kΩ or higher

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
K22-2 (BZN) or P6-3 (BUZ) - Body ground	Engine switch on (IG)	Below 1 V
K22-1 (BZP) - Body ground	Engine switch on (IG)	11 to 14 V
K22-1 (BZP) - Body ground	Engine switch off	Below 1 V

REPLACE RCTA BUZZER (BLIND SPOT MONITOR BUZZER)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Vehicle Speed Sensor (C1A45)

DESCRIPTION

The blind spot monitor sensor receives vehicle speed signals from the skid control ECU via CAN communication.

Blind Spot Monitor Master

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A45	Vehicle Speed Sensor	A fail flag is transmitted from the skid control ECU	Electronically controlled brake system Blind spot monitor sensor RH

Blind Spot Monitor Slave

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A45	Vehicle Speed Sensor	A fail flag is transmitted from the skid control ECU	Electronically controlled brake system Blind spot monitor sensor LH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

1.	CHECK OTHER DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Read the DTCs following the prompts on the Techstream. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

Chassis > ABS/VSC/TRAC > Trouble Codes

OK:

Electronically controlled brake system DTCs are not output.

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result	Proceed to
No DTCs are output	A
DTC C1A45 is output ("Blind Spot Monitor Master")	B
DTC C1A45 is output ("Blind Spot Monitor Slave")	C

USE SIMULATION METHOD TO CHECK

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE BLIND SPOT MONITOR SENSOR LH

Yaw Rate Sensor (C1A46)

DESCRIPTION

The blind spot monitor sensor receives yaw rate signals from the airbag sensor assembly (yaw rate and acceleration sensor) via CAN communication.

Blind Spot Monitor Master

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A46	Yaw Rate Sensor	A fail flag is transmitted from the airbag sensor assembly	Electronically controlled brake system Blind spot monitor sensor RH

Blind Spot Monitor Slave

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A46	Yaw Rate Sensor	A fail flag is transmitted from the airbag sensor assembly	Electronically controlled brake system Blind spot monitor sensor LH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

1.	CHECK OTHER DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Read the DTCs following the prompts on the Techstream. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

Chassis > ABS/VSC/TRAC > Trouble Codes

OK:

Electronically controlled brake system DTCs are not output.

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

2.	RECHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result	Proceed to
No DTCs are output.	A
DTC C1A46 is output ("Blind Spot Monitor Master").	B
DTC C1A46 is output ("Blind Spot Monitor Slave").	C

USE SIMULATION METHOD TO CHECK

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE BLIND SPOT MONITOR SENSOR LH

Steering Angle Sensor (C1A47)

DESCRIPTION

The blind spot monitor sensor receives steering angle signals from the steering sensor via CAN communication.

Blind Spot Monitor Master

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A47	Steering Angle Sensor	A fail flag is transmitted from the steering angle sensor	Steering sensor Blind spot monitor sensor RH

Blind Spot Monitor Slave

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A47	Steering Angle Sensor	A fail flag is transmitted from the steering angle sensor	Steering sensor Blind spot monitor sensor LH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	REPLACE STEERING SENSOR

(a) Replace the steering sensor with a new or known good one.

Click here

3.	RECHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result	Proceed to
No DTCs are output	A
DTC C1A47 is output ("Blind Spot Monitor Master")	B
DTC C1A47 is output ("Blind Spot Monitor Slave")	C

END

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE BLIND SPOT MONITOR SENSOR LH

Short to +B in Outer Mirror Indicator(Master) (C1AB0)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor RH detects a short to +B in the outer rear view mirror indicator RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB0

Short to +B in Outer Mirror Indicator(Master)

Both of the following conditions are met:

The blind spot monitor system is on

The blind spot monitor sensor is not sending voltage to the indicator but the indicator receives voltage above a specified level for a specified period of time

Outer mirror RH
Outer rear view mirror assembly RH
Wire harness or connector
Blind spot monitor sensor RH

WIRING DIAGRAM

w/o Seat Memory

w/ Seat Memory.

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR INDICATOR CIRCUIT)

(a) Disconnect the P5 blind spot monitor sensor RH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P5-4 (OMIR) - Body ground	Engine switch on (IG)	Below 1 V

REPLACE BLIND SPOT MONITOR SENSOR RH

3.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR INDICATOR CIRCUIT)

(a) Disconnect the IND1 outer mirror RH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P5-4 (OMIR) - Body ground	Engine switch on (IG)	Below 1 V

REPLACE OUTER MIRROR RH

4.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR INDICATOR CIRCUIT)

(a) Disconnect the I12*1 or I13*2 outer rear view mirror assembly RH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P5-4 (OMIR) - Body ground	Engine switch on (IG)	Below 1 V

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

REPAIR OR REPLACE HARNESS OR CONNECTOR

Short to +B in Outer Mirror Indicator(Slave) (C1AB1)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects a short to +B in the outer rear view mirror indicator LH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB1

Short to +B in Outer Mirror Indicator(Slave)

Both of the following conditions are met:

The blind spot monitor system is on

The blind spot monitor sensor is not sending voltage to the indicator but the indicator receives voltage above a specified level for a specified period of time

Outer mirror LH
Outer rear view mirror assembly LH
Wire harness or connector
Blind spot monitor sensor LH

WIRING DIAGRAM

w/o Seat Memory

w/ Seat Memory

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR INDICATOR CIRCUIT)

(a) Disconnect the P6 blind spot monitor sensor LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P6-4 (OMIL) - Body ground	Engine Switch on (IG)	Below 1 V

REPLACE BLIND SPOT MONITOR SENSOR LH

3.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR INDICATOR CIRCUIT)

(a) Disconnect the IND2 outer mirror LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P6-4 (OMIL) - Body ground	Engine Switch on (IG)	Below 1 V

REPLACE OUTER MIRROR LH

4.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR INDICATOR CIRCUIT)

(a) Disconnect the I28*1 or I29*2 outer rear view mirror assembly LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P6-4 (OMIL) - Body ground	Engine Switch on (IG)	Below 1 V

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

REPAIR OR REPLACE HARNESS OR CONNECTOR

Short to GND in Outer Mirror Indicator(Master) (C1AB2)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor RH detects a short to ground in the outer rear view mirror indicator RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB2

Short to GND in Outer Mirror Indicator(Master)

Both of the following conditions are met:

The blind spot monitor system is on

The current that is sent from the blind spot monitor sensor to the indicator is above a specified level for a specified period of time

Outer mirror RH
Outer rear view mirror assembly RH
Wire harness or connector
Blind spot monitor sensor RH

WIRING DIAGRAM

w/o Seat Memory

w/ Seat Memory

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - OUTER REAR VIEW MIRROR ASSEMBLY RH)

(a) Disconnect the P5 blind spot monitor sensor RH connector.

(b) Disconnect the I12*1 or I13*2 outer rear view mirror assembly RH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P5-4 (OMIR) or I12-7 (BSR+) - Body ground*1	Always	10 kΩ or higher
P5-4 (OMIR) or I13-7 (BSR+) - Body ground*2	Always	10 kΩ or higher

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH

(a) Disconnect the IND1 outer mirror RH connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I12-7 (BSR+) or IND1-2 (+) - Body ground*1	Always	10 kΩ or higher
I13-7 (BSR+) or IND1-2 (+) - Body ground*2	Always	10 kΩ or higher

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

4.	INSPECT OUTER MIRROR RH

(a) Remove the outer mirror RH.

Click here

(b) Inspect the outer rear view mirror indicator RH on the outer mirror RH.

Click here

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE OUTER MIRROR RH

Short to GND in Outer Mirror Indicator(Slave) (C1AB3)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects a short to ground in the outer rear view mirror indicator LH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB3

Short to GND in Outer Mirror Indicator(Slave)

Both of the following conditions are met:

The blind spot monitor system is on

The current that is sent from the blind spot monitor sensor to the indicator is above a specified level for a specified period of time

Outer mirror LH
Outer rear view mirror assembly LH
Wire harness or connector
Blind spot monitor sensor LH

WIRING DIAGRAM

w/o Seat Memory

w/ Seat Memory

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - OUTER REAR VIEW MIRROR ASSEMBLY LH)

(a) Disconnect the P6 blind spot monitor sensor LH connector.

(b) Disconnect the I28*1 or I29*2 outer rear view mirror assembly LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P6-4 (OMIL) or I28-7 (BSL+) - Body ground*1	Always	10 kΩ or higher
P6-4 (OMIL) or I29-7 (BSL+) - Body ground*2	Always	10 kΩ or higher

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

(a) Disconnect the IND2 outer mirror LH connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I28-7 (BSL+) or IND2-2 (+) - Body ground*1	Always	10 kΩ or higher
I29-7 (BSL+) or IND2-2 (+) - Body ground*2	Always	10 kΩ or higher

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

4.	INSPECT OUTER MIRROR LH

(a) Remove the outer mirror LH.

Click here

(b) Inspect the outer rear view mirror indicator LH on the outer mirror LH.

Click here

REPLACE BLIND SPOT MONITOR SENSOR LH

REPLACE OUTER MIRROR LH

Open in Outer Mirror Indicator(Master) (C1AB4)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor RH detects an open in the outer rear view mirror indicator RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB4

Open in Outer Mirror Indicator(Master)

Both of the following conditions are met:

The blind spot monitor system is on

The current flowing to the indicator is below a specified value when indicator operation voltage is being sent to the indicator

Outer mirror RH
Outer rear view mirror assembly RH
Wire harness or connector
Blind spot monitor sensor RH
Outer mirror control ECU assembly RH*

*: w/ Seat Memory

WIRING DIAGRAM

w/o Seat Memory

w/ Seat Memory

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

No DTCs are output.

Result	Proceed to
OK	A
NG (w/o Seat Memory)	B
NG (w/ Seat Memory)	C

USE SIMULATION METHOD TO CHECK

GO TO STEP 5

2.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - BLIND SPOT MONITOR SENSOR RH AND BODY GROUND)

(a) Disconnect the P5 blind spot monitor sensor RH connector.

(b) Disconnect the I12 outer rear view mirror assembly RH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P5-4 (OMIR) - I12-7 (BSR+)	Always	Below 1 Ω
I12-6 (-) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH

(a) Disconnect the IND1 outer mirror RH connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I12-7 (BSR+) - IND1-2 (+)	Always	Below 1 Ω
I12-6 (-) - IND1-1 (-)	Always	Below 1 Ω

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

4.	INSPECT OUTER MIRROR RH

(a) Remove the outer mirror RH.

Click here

(b) Inspect the outer rear view mirror indicator RH on the outer mirror RH.

Click here

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE OUTER MIRROR RH

5.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - BLIND SPOT MONITOR SENSOR RH)

(a) Disconnect the P5 blind spot monitor sensor RH connector.

(b) Disconnect the I12*1 or I13*2 outer rear view mirror assembly RH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P5-4 (OMIR) - I12-7 (BSR+)*1	Always	Below 1 Ω
P5-4 (OMIR) - I13-7 (BSR+)*2	Always	Below 1 Ω

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY RH - OUTER MIRROR CONTROL ECU ASSEMBLY RH AND BODY GROUND)

(a) Disconnect the I12*1 or I13*2 outer rear view mirror assembly RH connector.

(b) Disconnect the I5 and I6 outer mirror control ECU assembly RH connectors.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I12-6 (-) - I6-12 (RTN)*1	Always	Below 1 Ω
I13-6 (-) - I6-12 (RTN)*2	Always	Below 1 Ω
I5-7 (GND) - Body ground	Always	Below 1 Ω

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT OUTER MIRROR CONTROL ECU ASSEMBLY RH

(a) Disconnect the I5 and I6 outer mirror control ECU assembly RH connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I5-7 (GND) - I6-12 (RTN)	Always	Below 1 Ω

*a	Component without harness connected (Outer Mirror Control ECU Assembly RH)

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH

8.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH

(a) Disconnect the IND1 outer mirror RH connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I12-7 (BSR+) - IND1-2 (+)*1	Always	Below 1 Ω
I12-6 (-) - IND1-1 (-)*1	Always	Below 1 Ω
I13-7 (BSR+) - IND1-2 (+)*2	Always	Below 1 Ω
I13-6 (-) - IND1-1 (-)*2	Always	Below 1 Ω

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

9.	INSPECT OUTER MIRROR RH

(a) Remove the outer mirror RH.

Click here

(b) Inspect the outer rear view mirror indicator RH on the outer mirror RH.

Click here

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE OUTER MIRROR RH

Open in Outer Mirror Indicator(Slave) (C1AB5)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects an open in the outer rear view mirror indicator LH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AB5

Open in Outer Mirror Indicator(Slave)

Both of the following conditions are met:

The blind spot monitor system is on

The current flowing to the indicator is below a specified value when indicator operation voltage is being sent to the indicator

Outer mirror LH
Outer rear view mirror assembly LH
Wire harness or connector
Blind spot monitor sensor LH
Outer mirror control ECU assembly LH*

*: w/ Seat Memory

WIRING DIAGRAM

w/o Seat Memory

w/ Seat Memory

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

Result	Proceed to
OK	A
NG (w/o Seat Memory)	B
NG (w/ Seat Memory)	C

USE SIMULATION METHOD TO CHECK

GO TO STEP 5

2.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - BLIND SPOT MONITOR SENSOR LH AND BODY GROUND)

(a) Disconnect the P6 blind spot monitor sensor LH connector.

(b) Disconnect the I28 outer rear view mirror assembly LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P6-4 (OMIL) - I28-7 (BSL+)	Always	Below 1 Ω
I28-6 (-) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

(a) Disconnect the IND2 outer mirror LH connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I28-7 (BSL+) - IND2-2 (+)	Always	Below 1 Ω
I28-6 (-) - IND2-1 (-)	Always	Below 1 Ω

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

4.	INSPECT OUTER MIRROR LH

(a) Remove the outer mirror LH.

Click here

(b) Inspect the outer rear view mirror indicator LH on the outer mirror LH.

Click here

REPLACE BLIND SPOT MONITOR SENSOR LH

REPLACE OUTER MIRROR LH

5.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - BLIND SPOT MONITOR SENSOR LH)

(a) Disconnect the P6 blind spot monitor sensor LH connector.

(b) Disconnect the I28*1 or I29*2 outer rear view mirror assembly LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P6-4 (OMIL) - I28-7 (BSL+)*1	Always	Below 1 Ω
P6-4 (OMIL) - I29-7 (BSL+)*2	Always	Below 1 Ω

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH - OUTER MIRROR CONTROL ECU ASSEMBLY LH AND BODY GROUND)

(a) Disconnect the I28*1 or I29*2 outer rear view mirror assembly LH connector.

(b) Disconnect the I22 and I21 outer mirror control ECU assembly LH connectors.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I28-6 (-) - I22-12 (RTN)*1	Always	Below 1 Ω
I29-6 (-) - I22-12 (RTN)*2	Always	Below 1 Ω
I21-7 (GND) - Body ground	Always	Below 1 Ω

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Disconnect the I21 and I22 outer mirror control ECU assembly LH connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I21-7 (GND) - I22-12 (RTN)	Always	Below 1 Ω

*a	Component without harness connected (Outer Mirror Control ECU Assembly LH)

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

8.	INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

(a) Disconnect the IND2 outer mirror LH connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I28-7 (BSL+) - IND2-2 (+)*1	Always	Below 1 Ω
I28-6 (-) - IND2-1 (-)*1	Always	Below 1 Ω
I29-7 (BSL+) - IND2-2 (+)*2	Always	Below 1 Ω
I29-6 (-) - IND2-1 (-)*2	Always	Below 1 Ω

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

9.	INSPECT OUTER MIRROR LH

(a) Remove the outer mirror LH.

Click here

(b) Inspect the outer rear view mirror indicator LH on the outer mirror LH.

Click here

REPLACE BLIND SPOT MONITOR SENSOR LH

REPLACE OUTER MIRROR LH

Blind Spot Monitor Master Module (C1AB6)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor RH detects an internal malfunction.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AB6	Blind Spot Monitor Master Module	The blind spot monitor sensor RH (master) detects an internal malfunction	Blind spot monitor sensor RH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

REPLACE BLIND SPOT MONITOR SENSOR RH

Blind Spot Monitor Slave Module (C1AB7)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH detects an internal malfunction.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AB7	Blind Spot Monitor Slave Module	The blind spot monitor sensor LH (slave) detects an internal malfunction	Blind spot monitor sensor LH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

REPLACE BLIND SPOT MONITOR SENSOR LH

Destination Information Undefined (C1AB8)

DESCRIPTION

This DTC is stored when correct destination information is not sent from the main body ECU (multiplex network body ECU) and destination information cannot be confirmed after a blind spot monitor sensor has been replaced.

Blind Spot Monitor Master

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AB8	Destination Information Undefined	The blind spot monitor sensor cannot communicate with the main body ECU	CAN communication system Main body ECU (multiplex network body ECU) Blind spot monitor sensor RH

Blind Spot Monitor Slave

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AB8	Destination Information Undefined	The blind spot monitor sensor cannot communicate with the main body ECU	CAN communication system Main body ECU (multiplex network body ECU) Blind spot monitor sensor LH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
w/ Smart Key System: Click here

PROCEDURE

CHECK DTC

(a) Check for CAN communication system DTCs.

Click here

OK:

CAN communication system DTCs are not output.

GO TO CAN COMMUNICATION SYSTEM

2.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Replace the main body ECU (multiplex network body ECU) with a new or known good one.

Click here

3.	RECHECK DTC

(a) Recheck for DTCs and check if the same DTC is output again.

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result	Proceed to
No DTCs are output	A
DTC C1AB8 is output ("Blind Spot Monitor Master")	B
DTC C1AB8 is output ("Blind Spot Monitor Slave")	C

END

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE BLIND SPOT MONITOR SENSOR LH

Blind Spot Monitor Master Module Beam Axis Inspection Incomplete (C1ABB)

DESCRIPTION

This DTC is stored when a beam axis inspection has not been performed for the blind spot monitor sensor RH.

HINT:

This DTC is always stored after replacing a blind spot monitor sensor. The purpose of this DTC is to ensure that a beam axis inspection is performed. Completing the beam axis inspection after replacing a blind spot monitor sensor prevents this DTC from being output.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1ABB	Blind Spot Monitor Master Module Beam Axis Inspection Incomplete	A beam axis inspection has not been performed	Blind spot monitor sensor RH

PROCEDURE

1.	PROCEED TO TEST MODE (BLIND SPOT MONITOR BEAM AXIS INSPECTION)

(a) Change the blind spot monitor sensor RH to Test Mode using the Techstream.

HINT:

Refer to Blind Spot Monitor Beam Axis Inspection.

Click here

END

Blind Spot Monitor Slave Module Beam Axis Inspection Incomplete (C1ABC)

DESCRIPTION

This DTC is stored when a beam axis inspection has not been performed for the blind spot monitor sensor LH.

HINT:

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1ABC	Blind Spot Monitor Slave Module Beam Axis Inspection Incomplete	A beam axis inspection has not been performed	Blind spot monitor sensor LH

PROCEDURE

1.	PROCEED TO TEST MODE (BLIND SPOT MONITOR BEAM AXIS INSPECTION)

(a) Change the blind spot monitor sensor LH to Test Mode using the Techstream.

HINT:

Refer to Blind Spot Monitor Beam Axis Inspection.

Click here

END

Short to GND or Open in Buzzer (C1ABE)

DESCRIPTION

DTC C1ABE is stored when the blind spot monitor sensor LH detects a short to ground or open in the RCTA buzzer (blind spot monitor buzzer) circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1ABE	Short to GND or Open in Buzzer	Both of the following conditions are met: The blind spot monitor system is on The blind spot monitor sensor is not sounding the buzzer but the buzzer receives voltage below a specified level for a specified period of time.	RCTA buzzer (blind spot monitor buzzer) Wire harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.
Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	READ VALUE USING TECHSTREAM (BLIND SPOT MONITOR SENSOR LH STATUS)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Body Electrical / Blind Spot Monitor Slave / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Blind Spot Monitor Slave > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Buzzer Connection

Status of the buzzer connection

Valid or Invalid

Valid: Buzzer connection is valid

Invalid: Buzzer connection is invalid

Slave Side RCTA Function

Switches the RCTA function on and off

OFF or ON

OFF: RCTA function off

ON: RCTA function on

Body Electrical > Blind Spot Monitor Slave > Data List

Tester Display
Buzzer Connection
Slave Side RCTA Function

Result	Proceed to
"Valid" and "ON" is displayed for all items.	A
"Invalid" or "OFF" is displayed.	B

REPLACE BLIND SPOT MONITOR SENSOR LH

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

3.	CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BATTERY AND BLIND SPOT MONITOR SENSOR LH)

(a) Disconnect the K22 RCTA buzzer (blind spot monitor buzzer) connector.

(b) Disconnect the P6 blind spot monitor sensor LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K22-2 (BZN) - P6-3 (BUZ)	Always	Below 1 Ω
K22-2 (BZN) or P6-3 (BUZ) - Body ground	Always	10 kΩ or higher

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
K22-1 (BZP) - Body ground	Engine switch on (IG)	11 to 14 V
K22-1 (BZP) - Body ground	Engine switch off	Below 1 V

REPLACE RCTA BUZZER (BLIND SPOT MONITOR BUZZER)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Master Module Horizontal Axis Misalignment (C1AC1)

DESCRIPTION

This DTC is stored when the angle of the blind spot monitor sensor RH deviates more than the allowable range from the horizontal axis.

HINT:

If a drum tester such as a speedometer tester, brake/speedometer combination tester or chassis dynamometer is used with the blind spot monitor system on, the blind spot monitor sensor may store this DTC by mistake.
When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the rear bumper, the blind spot monitor sensor may store this DTC by mistake.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AC1	Master Module Horizontal Axis Misalignment	When the blind spot monitor sensor deviates 5 degrees or more from the horizontal axis when the system is activated	Blind spot monitor sensor RH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.
If the bumper is damaged or the vehicle has a history of body repair, there is a possibility that the installation area of the blind spot monitor sensor may be deformed and the blind spot monitor sensor system may not operate correctly, so visually inspect the blind spot monitor sensor installation area (frame, stud bolt) to make sure it is not dented or bent.
Click here

If the visual inspection finds a problem, check the installation condition of the blind spot monitor sensor, and adjust the installation position of the blind spot monitor sensor as necessary.

PROCEDURE

1.	CHECK VEHICLE CONDITION

(a) Check the condition of the rear bumper around the blind spot monitor sensors.

HINT:

When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the rear bumper, the blind spot monitor sensor may store this DTC by mistake.

Result	Proceed to
A sticker, mud, snow, ice, etc. is covering the sensor or surrounding area on the rear bumper.	A
There are scratches or dents on the rear bumper around the sensors.	B
No abnormalities.	B

GO TO STEP 3

2.	PERFORM BEAM AXIS CONFIRMATION

(a) Clean the rear bumper.

(b) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.

Click here

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display
BSM Master Beam Axis Display

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display
BSM Master Beam Axis Adjustment

END

REPLACE BLIND SPOT MONITOR SENSOR RH

3.	CHECK INSTALLATION CONDITION

(a) Check the installation condition of the blind spot monitor sensor RH.

Click here

HINT:

Take the appropriate action in accordance with the result.

4.	PERFORM BEAM AXIS CONFIRMATION

(a) Install the rear bumper.

Click here

(b) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.

Click here

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display
BSM Master Beam Axis Display

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display
BSM Master Beam Axis Adjustment

END

REPLACE BLIND SPOT MONITOR SENSOR RH

Slave Module Horizontal Axis Misalignment (C1AC2)

DESCRIPTION

This DTC is stored when the angle of the blind spot monitor sensor LH deviates more than the allowable range from the horizontal axis.

HINT:

If a drum tester such as a speedometer tester, brake/speedometer combination tester or chassis dynamometer is used with the blind spot monitor system on, the blind spot monitor sensor may store this DTC by mistake.
When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the rear bumper, the blind spot monitor sensor may store this DTC by mistake.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AC2	Slave Module Horizontal Axis Misalignment	When the blind spot monitor sensor deviates 5 degrees or more from the horizontal axis when the system is activated	Blind spot monitor sensor LH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.
If the bumper is damaged or the vehicle has a history of body repair, there is a possibility that the installation area of the blind spot monitor sensor may be deformed and the blind spot monitor sensor system may not operate correctly, so visually inspect the blind spot monitor sensor installation area (frame, stud bolt) to make sure it is not dented or bent.
Click here

If the results are not as specified, it is possible that the blind spot monitor sensor installation area (frame, stud bolt) is deformed, so make corrections as necessary.

PROCEDURE

1.	CHECK VEHICLE CONDITION

(a) Check the condition of the rear bumper around the blind spot monitor sensors.

HINT:

When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the rear bumper, the blind spot monitor sensor may store this DTC by mistake.

Result	Proceed to
A sticker, mud, snow, ice, etc. is covering the sensor or surrounding area on the rear bumper.	A
There are scratches or dents on the rear bumper around the sensors.	B
No abnormalities.	B

GO TO STEP 3

2.	PERFORM BEAM AXIS CONFIRMATION

(a) Clean the rear bumper.

(b) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.

Click here

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display
BSM Slave Beam Axis Display

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display
BSM Slave Beam Axis Adjustment

END

REPLACE BLIND SPOT MONITOR SENSOR LH

3.	CHECK INSTALLATION CONDITION

(a) Check the installation condition of the blind spot monitor sensor LH.

Click here

HINT:

Take the appropriate action in accordance with the result.

4.	PERFORM BEAM AXIS CONFIRMATION

(a) Install the rear bumper.

Click here

(b) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.

Click here

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display
BSM Slave Beam Axis Display

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display
BSM Slave Beam Axis Adjustment

END

REPLACE BLIND SPOT MONITOR SENSOR LH

Customize Parameters

CUSTOMIZE PARAMETERS

CUSTOMIZE BLIND SPOT MONITOR SYSTEM

(a) Customizing with the Techstream

NOTICE:

When the customer requests a change in a function, first make sure that the function can be customized.
Be sure to make a note of the current settings before customizing.
When troubleshooting a function, first make sure that the function is set to the default setting.

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch to ON.

(3) Turn the blind spot monitor system on.

(4) Turn the Techstream on.

(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / Warning.

(6) Select the setting by referring to the table below.

Warning

Tester Display	Description	Default	Setting	ECU
BSM Buzzer Volume Adjust	Sets the volume of the RCTA buzzer (blind spot monitor buzzer).	Medium	001:Low,011:Medium,101:High	Blind Spot Monitor Sensor LH
BSM Mirror Indicator Brightness	Sets the brightness of the indicators in the outer rear view mirror assemblies.	Bright	001:Dark,101:Bright	Blind Spot Monitor Sensor RH
RCTA Function	Switches the RCTA function on and off.*	ON	0:ON,1:OFF	Blind Spot Monitor Sensor RH

*: If the RCTA function is turned off, the RCTAB function of the intelligent clearance sonar system also turns off.

Data List / Active Test

DATA LIST / ACTIVE TEST

DATA LIST

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Blind Spot Monitor Master > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Main Switch	State of the Blind spot monitor system	OFF or ON	OFF: Blind spot monitor system off ON: Blind spot monitor system on	-
RCTA Switch Status	State of the RCTA function	OFF or ON	OFF: RCTA function off ON: RCTA function on	-
Warning Indicator Turning on(Master)	State of the outer rear view mirror indicator RH turning on	OFF or ON	OFF: Any state except "ON" state ON: Either of the following state During initial check Blind spot monitor system on, vehicle detected on left hand side and turn signal switch not operated	-
Warning Indicator Flashing(Master)	State of the outer rear view mirror indicator RH flashing	OFF or ON	OFF: Any state except "ON" state ON: Either of the following state Blind spot monitor system on, vehicle detected on left hand side and left side of turn signal switch on Vehicle detected by RCTA function	-
Warning Indicator Input Circuit Voltage	Outer rear view mirror indicator voltage	Min.: 0 V, Max.: 25.5 V	Indicator illuminated: 2.5 to 7.5 V Indicator not illuminated: Below 1 V	-
Warning Indicator Input Circuit Current	Outer rear view mirror indicator current	Min.: 0 mA, Max.: 255 mA	Indicator illuminated: 5 to 100 mA Indicator not illuminated: 0 mA	-
Turn Switch State	State of the turn signal switch	Left ON, Right ON or OFF	Left ON: Left turn signal switch on Right ON: Right turn signal switch on OFF: Turn signal switch off	-
Reverse (Only for AT/CVT)	State of the shift position R signal	OFF or ON	OFF: Shift lever in any position except R ON: Shift lever in R	-
Vehicle Speed	Vehicle speed signal	Min.: -327.68 km/h (-204 mph), Max.: 327.67 km/h (204 mph)	Vehicle stopped: 0 km/h (0 mph)	-
Steering Angle	Steering sensor	Min.: -3072 deg, Max.: 3070.5 deg	Left turn: Increases Right turn: Decreases	-
Power Supply Voltage	Power supply voltage	Min.: 0 V, Max.: 49.951 V	Engine switch on (IG): 11 to 14 V	-
Indicator Light Control State	Outer rear view mirror indicator dimming state	Dim OFF or Dim ON	Dim OFF: Indicator not dimmed Dim ON: Indicator dimmed	-
HV Flag	Hybrid vehicle	OFF or ON	OFF: Non-hybrid vehicle ON: Hybrid vehicle	-
VGRS Flag	VGRS installed	OFF or ON	OFF: VGRS not installed ON: VGRS installed	-
Beam Axis Inspection Completeness Flag	Completion of beam axis adjustment	Incompl or Compl	Incompl: Adjustment not completed Compl: Adjustment completed	Changes to "Compl" when blind spot monitor beam axis adjustment has been finished
Destination Undefined Flag	Destination determination	Unfixed or Fixed	Unfixed: Sensor destination information not determined Fixed: Sensor destination information determined according to CAN destination information	-
Angle Adjustment by Auto Alignment	Angle adjusted using auto alignment	Min.: Under -180 deg, Max.: Over 180 deg	Angle adjusted using auto alignment is displayed	-
RCTA Equipped Information	State of the RCTA equipped information / OFF or ON	OFF or ON	OFF: w/o RCTA function ON: w/ RCTA function	-
Master Side RCTA Function	Switches the RCTA function on and off	OFF or ON	ON: RCTA function on OFF: RCTA function off	-
Mirror LED Control Frequency	Frequency of the outer rear view mirror indicator on the outer mirror when blinking	Min.: 1500 Hz, Max.: 2400 Hz	Always: 2000 Hz	-
Setting of Warning Indicator Current (Dim OFF)	Set current of the outer rear view mirror indicator when not dimmed	Min.: 0 mA, Max.: 100 mA	Always: 0 to 100 mA	-
Setting of Warning Indicator Current (Dim ON)	Set current of the outer rear view mirror indicator when dimmed	Min.: 0 mA, Max.: 100 mA	Always: 0 to 100 mA	-
Mirror LED Duty Ratio (Blinking)	Duty ratio of the outer rear view mirror indicator when blinking	Min.: 0%, Max.: 100%	Always: 50 %	-
Yaw Rate Sensor	Yaw rate sensor	Min.: Under -125 deg/s, Max.: 124.612 deg/s	Turning right: -125 to 0 deg/s Turning left: 0 to 124.612 deg/s	-
Master Side BSM Approaching Vehicle Detection Timing Setting	Notification timing for vehicles approaching from behind the vehicle	Only Blind Spot, Late, Middle or Early	Only Blind Spot: Only detection area (for vehicle in blind spot) is active Late: Late notification Middle: Default notification timing Early: Early notification	-
BSM Mirror Indicator Brightness	Brightness of the indicators in the outer rear view mirror assemblies	Dark or Bright	Dark: Outer mirror indicator brightness low Dark: Outer mirror indicator brightness low	-
Mounting FHL Function	Existence of FHL function	Without or With	Without: w/o FHL function With: w/ FHL function	-
Number of DTC	Number of DTC	Min.: 0, Max.: 255	When system is normal: 0 When a malfunction is detected: More than 0	-

Body Electrical > Blind Spot Monitor Slave > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Warning Indicator Turning on(Slave)	State of the outer rear view mirror indicator LH turning on	OFF or ON	OFF: Any state except "ON" state ON: Either of the following state During initial check Blind spot monitor system on, vehicle detected on right hand side and turn signal switch not operated	-
Warning Indicator Flashing(Slave)	State of the outer rear view mirror indicator LH flashing	OFF or ON	OFF: Any state except "ON" state ON: Either of the following state Blind spot monitor system on, vehicle detected on right hand side and right side of turn signal switch on Vehicle detected by RCTA function	-
Buzzer Sound Status	State of the RCTA buzzer (blind spot monitor buzzer)	OFF or ON	OFF: Buzzer not sounding ON: Buzzer sounding	-
Warning Indicator Input Circuit Voltage	Outer rear view mirror indicator voltage	Min.: 0 V, Max.: 25.5 V	Indicator illuminated: 2.5 to 7.5 V Indicator not illuminated: Below 1 V	-
Warning Indicator Input Circuit Current	Outer rear view mirror indicator current	Min.: 0 mA, Max.: 255 mA	Indicator illuminated: 5 to 100 mA Indicator not illuminated: 0 mA	-
Buzzer Input Circuit Voltage	RCTA buzzer (blind spot monitor buzzer) voltage	Min.: 0 V, Max.: 25.5 V	Buzzer not sounding: 11 to 14 V Buzzer sounding: Alternating between 0 to 14 V	-
Turn Switch State	State of the turn signal switch	Left ON, Right ON or OFF	Left ON: Left turn signal switch on Right ON: Right turn signal switch on OFF: Turn signal switch off	-
Reverse (Only for AT/CVT)	State of the shift position R signal	OFF or ON	OFF: Shift lever in any position except R ON: Shift lever in R	-
Vehicle Speed	Vehicle speed signal	Min.: -327.68 km/h (-204 mph), Max.: 327.67 km/h (204 mph)	Vehicle stopped: 0 km/h (0 mph)	-
Steering Angle	Steering sensor	Min.: -3072 deg, Max.: 3070.5 deg	Left turn: Increases Right turn: Decreases	-
Power Supply Voltage	Power supply voltage	Min.: 0 V, Max.: 49.951 V	Engine switch on (IG): 11 to 14 V	-
Indicator Light Control State	Outer rear view mirror indicator dimming state	Dim OFF or Dim ON	Dim OFF: Indicator not dimmed Dim ON: Indicator dimmed	-
HV Flag	Hybrid vehicle	OFF or ON	OFF: Non-hybrid vehicle ON: Hybrid vehicle	-
VGRS Flag	VGRS installed	OFF or ON	OFF: VGRS not installed ON: VGRS installed	-
Beam Axis Inspection Completeness Flag	Completion of beam axis adjustment	Incompl or Compl	Incompl: Adjustment not completed Compl: Adjustment completed	Changes to "Compl" when blind spot monitor beam axis adjustment has been finished
Destination Undefined Flag	Destination determination	Unfixed or Fixed	Unfixed: Sensor destination information not determined Fixed: Sensor destination information determined according to CAN destination information	-
Angle Adjustment by Auto Alignment	Angle adjusted using auto alignment	Min.: Under -180 deg, Max.: Over 180 deg	Angle adjusted using auto alignment is displayed	-
RCTA Equipped Information	State of the RCTA equipped information / OFF or ON	OFF or ON	OFF: w/o RCTA function ON: w/ RCTA function	-
Slave Side RCTA Function	Switches the RCTA function on and off	OFF or ON	OFF: RCTA function off ON: RCTA function on	-
Mirror LED Control Frequency	Frequency of the outer rear view mirror indicator on the outer mirror when blinking	Min.: 1500 Hz, Max.: 2400 Hz	Always: 2000 Hz	-
Setting of Warning Indicator Current (Dim OFF)	Set current of the outer rear view mirror indicator when not dimmed	Min.: 0 mA, Max.: 100 mA	Always: 0 to 100 mA	-
Setting of Warning Indicator Current (Dim ON)	Set current of the outer rear view mirror indicator when dimmed	Min.: 0 mA, Max.: 100 mA	Always: 0 to 100 mA	-
Mirror LED Duty Ratio (Blinking)	Duty ratio of the outer rear view mirror indicator when blinking	Min.: 0%, Max.: 100%	Always: 50%	-
Buzzer Control Frequency	Frequency of RCTA buzzer (blind spot monitor buzzer) when sounding	Min.: 1000 Hz, Max.: 2400 Hz	Always: 2000 Hz	-
Yaw Rate Sensor	Yaw rate sensor	Min.: Under -125 deg/s, Max.: 124.612 deg/s	Turning right: -125 to 0 deg/s Turning left: 0 to 124.612 deg/s	-
BSM Buzzer Volume Adjust	Volume of the RCTA buzzer (blind spot monitor buzzer)	Low, Medium or High	Low: Buzzer volume less than that of medium Medium: Default buzzer volume High: Buzzer volume more than that of medium	-
Mounting FHL Function	Existence of FHL function	Without or With	Without: w/o FHL function With: w/ FHL function	-
Number of DTC	Number of DTC	Min.: 0, Max.: 255	When system is normal: 0 When a malfunction is detected: More than 0	-

Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

(a) Blind spot monitor data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.

CHECK DLC3

(a) Check the DLC3.

Click here

DIAGNOSIS FUNCTION

(a) The blind spot monitor system displays an error message on the multi-information display to inform the driver that the system is unavailable either temporarily or due to a malfunction.

When the system is unavailable temporarily:
Multi-information display displays "Blind Spot Monitor Unavailable".
When the system is unavailable due to a malfunction:
Multi-information display displays "Blind Spot Monitor Malfunction Visit Your Dealer".

(b) The RCTA function displays an error message on the multi-information display to inform the driver that the system is unavailable either temporarily or due to a malfunction.

When the function is unavailable temporarily:
Multi-information display displays "Rear Cross Traffic Alert Unavailable".
When the function is unavailable due to a malfunction:
Multi-information display displays "Rear Cross Traffic Alert Malfunction Visit Your Dealer".

ABNORMALITY HISTORY

HINT:

The abnormality history for a blind spot monitor sensor can be displayed or cleared.

(a) Check abnormality history

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Turn the Techstream on.

(4) Turn the blind spot monitor system on.

(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Abnormal History or BSM Slave Abnormal History.

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display
BSM Master Abnormal History

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display
BSM Slave Abnormal History

(6) Check the results displayed for the abnormality history check.

HINT:

If "Yes" is displayed, check the suspected area column for each item.
Abnormality history is stored only for the blind spot monitor sensor for which an abnormality has been detected.
If "No" is displayed, refer to Problem Symptoms Table.
Click here

Abnormality History Table

Tester Display	Item Explanation	Suspected Area
History of Module Blockage	History of blind spot monitor sensor detection problems due to snow, rain, etc. on the bumper	Check if a bumper compatible with the blind spot monitor (such as an original equipment bumper) is installed Check if any foreign matter is attached to the bumper Check if any foreign matter is present between the bumper and sensors
History of Low Voltage	History of low supply battery voltage from battery to the blind spot monitor sensor	Power Source Circuit Click here
History of High Voltage	History of high supply battery voltage from battery to the blind spot monitor sensor	Power Source Circuit Click here
History of Low Temperature	History of low temperature for the blind spot monitor sensor	Check the outside temperature Check if any foreign matter is attached to the blind spot monitor sensors and their surrounding areas
History of High Temperature	History of high temperature for the blind spot monitor sensor

(b) Clearing abnormality history

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Turn the Techstream on.

(4) Turn the blind spot monitor system on.

(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Abnormal History or BSM Slave Abnormal History.

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display
BSM Master Abnormal History

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display
BSM Slave Abnormal History

(6) Clear the abnormality history.

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Blind Spot Monitor System

DTC No.	Detection Item	Link
C1A45	Vehicle Speed Sensor
C1A45	Vehicle Speed Sensor
C1A46	Yaw Rate Sensor
C1A46	Yaw Rate Sensor
C1A47	Steering Angle Sensor
C1A47	Steering Angle Sensor
C1AB0	Short to +B in Outer Mirror Indicator(Master)
C1AB1	Short to +B in Outer Mirror Indicator(Slave)
C1AB2	Short to GND in Outer Mirror Indicator(Master)
C1AB3	Short to GND in Outer Mirror Indicator(Slave)
C1AB4	Open in Outer Mirror Indicator(Master)
C1AB5	Open in Outer Mirror Indicator(Slave)
C1AB6	Blind Spot Monitor Master Module
C1AB7	Blind Spot Monitor Slave Module
C1AB8	Destination Information Undefined
C1AB8	Destination Information Undefined
C1ABB	Blind Spot Monitor Master Module Beam Axis Inspection Incomplete
C1ABC	Blind Spot Monitor Slave Module Beam Axis Inspection Incomplete
C1ABE	Short to GND or Open in Buzzer
C1AC1	Master Module Horizontal Axis Misalignment
C1AC2	Slave Module Horizontal Axis Misalignment
U0100	Lost Communication with ECM / PCM "A"
U0100	Lost Communication with ECM / PCM "A"
U0125	Lost Communication with Yaw Rate Sensor Module
U0125	Lost Communication with Yaw Rate Sensor Module
U0126	Lost Communication with Steering Angle Sensor Module
U0126	Lost Communication with Steering Angle Sensor Module
U0129	Lost Communication with Brake System Control Module
U0129	Lost Communication with Brake System Control Module
U0142	Lost Communication with Body Control Module "B"
U0142	Lost Communication with Body Control Module "B"
U0232	Lost Communication with Blind Spot Monitor Slave Module
U0233	Lost Communication with Blind Spot Monitor Master Module
U1331	Software Incompatibility with Body Control Module "B"
U1331	Software Incompatibility with Body Control Module "B"

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Trouble Codes.

HINT:

The blind spot monitor sensor RH and the blind spot monitor sensor LH both output DTCs. Therefore, check both blind spot monitor sensors for DTCs.

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

(f) Check for DTCs.

Click here

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Trouble Codes.

Body Electrical > Blind Spot Monitor Master > Clear DTCs Body Electrical > Blind Spot Monitor Slave > Clear DTCs

(f) Clear the DTCs.

Freeze Frame Data

FREEZE FRAME DATA

FREEZE FRAME DATA

(a) Whenever DTCs are detected, the blind spot monitor sensor stores the current vehicle (sensor) state as freeze frame data.

CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Trouble Codes.

(f) According to the display on the Techstream, read the freeze frame data for the selected DTC.

Body Electrical > Blind Spot Monitor Master

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Main Switch	State of the Blind spot monitor system	OFF or ON	OFF: Blind spot monitor system off ON: Blind spot monitor system on	-
RCTA Switch Status	State of the RCTA function	OFF or ON	OFF: RCTA function off ON: RCTA function on	-
Warning Indicator Turning on(Master)	State of the outer rear view mirror indicator RH turning on	OFF or ON	OFF: Any state except "ON" state ON: Either of the following state During initial check Blind spot monitor system on, vehicle detected on left hand side and turn signal switch not operated	-
Warning Indicator Flashing(Master)	State of the outer rear view mirror indicator RH flashing	OFF or ON	OFF: Any state except "ON" state ON: Either of the following state Blind spot monitor system on, vehicle detected on left hand side and left side of turn signal switch on Vehicle detected by RCTA function	-
Warning Indicator Input Circuit Voltage	Outer rear view mirror indicator voltage	Min.: 0 V, Max.: 25.5 V	Indicator illuminated: 2.5 to 7.5 V Indicator not illuminated: Below 1 V	-
Warning Indicator Input Circuit Current	Outer rear view mirror indicator current	Min.: 0 mA, Max.: 255 mA	Indicator illuminated: 5 to 100 mA Indicator not illuminated: 0 mA	-
Turn Switch State	State of the turn signal switch	Left ON, Right ON or OFF	Left ON: Left turn signal switch on Right ON: Right turn signal switch on OFF: Turn signal switch off	-
Reverse (Only for AT/CVT)	State of the shift position R signal	OFF or ON	OFF: Shift lever in any position except R ON: Shift lever in R	-
Vehicle Speed	Vehicle speed signal	Min.: -327.68 km/h (-204 mph), Max.: 327.67 km/h (204 mph)	Vehicle stopped: 0 km/h (0 mph)	-
Steering Angle	Steering sensor	Min.: -3072 deg, Max.: 3070.5 deg	Left turn: Increases Right turn: Decreases	-
Power Supply Voltage	Power supply voltage	Min.: 0 V, Max.: 49.951 V	Engine switch on (IG): 11 to 14 V	-
Indicator Light Control State	Outer rear view mirror indicator dimming state	Dim OFF or Dim ON	Dim OFF: Indicator not dimmed Dim ON: Indicator dimmed	-
Angle Adjustment by Auto Alignment	Angle adjusted using auto alignment	Min.: Under -180 deg, Max.: Over 180 deg	Angle adjusted using auto alignment is displayed	-
Yaw Rate Sensor	Yaw rate sensor	Min.: Under -124.928 deg/s, Max.: 124.684 deg/s	Turning right: -125 to 0 deg/s Turning left: 0 to 124.612 deg/s	-
Number of DTC	Number of DTC	Min.: 0, Max.: 255	When system is normal: 0 When a malfunction is detected: More than 0	-

Body Electrical > Blind Spot Monitor Slave

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Warning Indicator Turning on(Slave)	State of the outer rear view mirror indicator LH turning on	OFF or ON	OFF: Any state except "ON" state ON: Either of the following state During initial check Blind spot monitor system on, vehicle detected on right hand side and turn signal switch not operated	-
Warning Indicator Flashing(Slave)	State of the outer rear view mirror indicator LH flashing	OFF or ON	OFF: Any state except "ON" state ON: Either of the following state Blind spot monitor system on, vehicle detected on right hand side and right side of turn signal switch on Vehicle detected by RCTA function	-
Buzzer Sound Status	State of the RCTA buzzer (blind spot monitor buzzer)	OFF or ON	OFF: Buzzer not sounding ON: Buzzer sounding	-
Warning Indicator Input Circuit Voltage	Outer rear view mirror indicator voltage	Min.: 0 V, Max.: 25.5 V	Indicator illuminated: 2.5 to 7.5 V Indicator not illuminated: Below 1 V	-
Warning Indicator Input Circuit Current	Outer rear view mirror indicator current	Min.: 0 mA, Max.: 255 mA	Indicator illuminated: 5 to 100 mA Indicator not illuminated: 0 mA	-
Buzzer Input Circuit Voltage	Buzzer Input Circuit Voltage	Min.: 0 V, Max.: 25.5 V	Engine switch on (IG): 11 to 14 V	-
Turn Switch State	State of the turn signal switch	Left ON, Right ON or OFF	Left ON: Left turn signal switch on Right ON: Right turn signal switch on OFF: Turn signal switch off	-
Reverse (Only for AT/CVT)	State of the shift position R signal	OFF or ON	OFF: Shift lever in any position except R ON: Shift lever in R	-
Vehicle Speed	Vehicle speed signal	Min.: -327.68 km/h (-204 mph), Max.: 327.67 km/h (204 mph)	Vehicle stopped: 0 km/h (0 mph)	-
Steering Angle	Steering sensor	Min.: -3072 deg, Max.: 3070.5 deg	Left turn: Increases Right turn: Decreases	-
VGRS Relative Angle	Compensation value of steering angle calculated by VGRS	Min.: -8.192 rad, Max.: 8.191 rad	Left turn: Increases Right turn: Decreases	-
Power Supply Voltage	Power supply voltage	Min.: 0 V, Max.: 49.951 V	Engine switch on (IG): 11 to 14 V	-
Indicator Light Control State	Outer rear view mirror indicator dimming state	Dim OFF or Dim ON	Dim OFF: Indicator not dimmed Dim ON: Indicator dimmed	-
Angle Adjustment by Auto Alignment	Angle adjusted using auto alignment	Min.: Under -180 deg, Max.: Over 180 deg	Angle adjusted using auto alignment is displayed	-
Yaw Rate Sensor	Yaw rate sensor	Min.: Under -124.928 deg/s, Max.: 124.684 deg/s	Turning right: -125 to 0 deg/s Turning left: 0 to 124.612 deg/s	-
Number of DTC	Number of DTC	Min.: 0, Max.: 255	When system is normal: 0 When a malfunction is detected: More than 0	-

CLEAR FREEZE FRAME DATA

NOTICE:

Clearing the DTCs will also clear the freeze frame data.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Clear the DTCs and freeze frame data.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the blind spot monitor system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

HINT:

If there are any scratches or impact marks on the rear bumper, perform the blind spot monitor beam axis confirmation. If any abnormalities are found, perform the blind spot monitor sensor installation condition inspection.

3.	INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, replace or recharge the battery before proceeding to the next step.

4.	CHECK CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

Result	Proceed to
CAN communication system DTCs are not output.	A
CAN communication system DTCs are output.	B

GO TO CAN COMMUNICATION SYSTEM

5.	CHECK FOR DTC AND FREEZE FRAME DATA*

(a) Refer to DTC Check / Clear for the blind spot monitor system.

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

(b) Record or print DTCs and freeze frame data, if necessary.

Click here

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

6.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault is not listed in Problem Symptoms Table.	A
Fault is listed in Problem Symptoms Table.	B

HINT:

If the symptom does not recur and no DTCs are output, attempt to reproduce the symptoms.

Click here

GO TO PROBLEM SYMPTOMS TABLE

7.	PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM*

(a) Refer to Terminals of ECU.

Click here

(b) Refer to Diagnosis System.

Click here

8.	ADJUST, REPAIR OR REPLACE

Result	Proceed to
When adjusting or repairing	A
When replacing	B

GO TO STEP 10

9.	CLEAR DTC*

(a) Clear the DTCs.

Click here

Body Electrical > Blind Spot Monitor Master > Clear DTCs Body Electrical > Blind Spot Monitor Slave > Clear DTCs

GO TO STEP 10

10.	PERFORM BEAM AXIS INSPECTION

(a) Enter Test Mode (refer to Blind Spot Monitor Beam Axis Inspection).

Click here

(b) Confirm the blind spot monitor beam axis display and perform the blind spot monitor beam axis adjustment.

11.	PERFORM CONFIRMATION TEST*

END

Parts Location

PARTS LOCATION

ILLUSTRATION

OUTER REAR VIEW MIRROR ASSEMBLY LH

OUTER REAR VIEW MIRROR ASSEMBLY RH

BRAKE ACTUATOR ASSEMBLY

- SKID CONTROL ECU

ECM

OUTER MIRROR CONTROL ECU ASSEMBLY LH (w/ Seat Memory)

OUTER MIRROR CONTROL ECU ASSEMBLY RH (w/ Seat Memory)

ILLUSTRATION

*1	OUTER MIRROR LH	*2	OUTER MIRROR RH
*3	OUTER REAR VIEW MIRROR INDICATOR LH	*4	OUTER REAR VIEW MIRROR INDICATOR RH
*5	BLIND SPOT MONITOR SENSOR RH (MASTER)	*6	BLIND SPOT MONITOR SENSOR LH (SLAVE)
*7	RCTA BUZZER (BLIND SPOT MONITOR BUZZER)	*8	TELEVISION CAMERA ASSEMBLY (w/ Parking Assist Monitor System)
*9	NO. 26 JUNCTION CONNECTOR	-	-

ILLUSTRATION

*1	STEERING PAD SWITCH ASSEMBLY	*2	DLC3
*3	STEERING SENSOR	*4	COMBINATION METER ASSEMBLY - MULTI-INFORMATION DISPLAY
*5	INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-IG1 NO. 4 FUSE - IG1-NO. 1 RELAY	*6	MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*7	AIRBAG SENSOR ASSEMBLY - YAW RATE AND ACCELERATION SENSOR	*8	RADIO AND DISPLAY RECEIVER ASSEMBLY - MULTI-DISPLAY
*9	PARKING ASSIST ECU (w/ Panoramic View Monitor System)	-	-

Power Source Circuit

DESCRIPTION

This circuit provides power to operate the blind spot monitor sensor.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH POWER SOURCE)

(a) Disconnect the P5 blind spot monitor sensor RH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P5-5 (BRB) - Body ground	Engine switch on (IG)	11 to 14 V
P5-5 (BRB) - Body ground	Engine switch off	Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P5-10 (BRGD) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH POWER SOURCE)

(a) Disconnect the P6 blind spot monitor sensor LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P6-5 (BLB) - Body ground	Engine switch on (IG)	11 to 14 V
P6-5 (BLB) - Body ground	Engine switch off	Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P6-10 (BLGD) - Body ground	Always	Below 1 Ω

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.

System Name	See Procedure
Lane Departure Alert System (w/ Steering Control)
Intelligent Clearance Sonar System
Parking Assist Monitor System
Panoramic View Monitor System
Pre-collision System
Lighting System (for Gasoline Model with Cornering Light)

PRECAUTIONS FOR BLIND SPOT MONITOR SYSTEM

(a) The blind spot monitor function may not detect vehicles correctly in the following conditions:

(1) When the sensor is misaligned due to a strong impact to the sensor or its surrounding area.

(2) When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the rear bumper.

(3) When driving on a road surface that is wet with standing water or there is snow during bad weather such as heavy rain, snow, or fog.

(4) When multiple vehicles are approaching with only a small gap between each vehicle.

(5) When the distance between this vehicle and a following vehicle is short.

(6) When there is a significant difference in speed between this vehicle and the vehicle that enters the detection area.

(7) When the difference in speed between this vehicle and another vehicle is changing.

(8) When a vehicle enters a detection area traveling at about the same speed as this vehicle.

(9) As this vehicle starts from a stop, a vehicle remains in the detection area.

(10) When driving up and down consecutive steep inclines, such as hills, dips in the road, etc.

(11) When driving on roads with sharp bends, consecutive curves, or uneven surfaces.

(12) When vehicle lanes are wide, or when driving on the edge of a lane, and the vehicle in an adjacent lane is far away from this vehicle.

(13) When towing a trailer.

(14) When a bicycle carrier or other accessory is installed to the rear of the vehicle.

(15) When there is a significant difference in height between this vehicle and the vehicle that enters the detection area.

(16) Immediately after the blind spot monitor system is turned on.

HINT:

In this section, the expression "this vehicle" is used to refer to the vehicle equipped with this blind spot monitor system.

(b) The blind spot monitor function is not designed to detect the following types of vehicles or objects:

(1) Vehicles traveling from the opposite direction.

(2) Small motorcycles, bicycles, pedestrians, etc.*

(3) Following vehicles that are in the same lane.*

(4) Guardrails, walls, signs, parked vehicles and similar stationary objects.*

(5) Vehicles driving 2 lanes across from this vehicle.

*: Depending on conditions, detection of a vehicle and/or object may occur.

(c) Instances of the blind spot monitor function unnecessarily detecting a vehicle and/or object may increase under the following conditions:

(1) When the sensor is misaligned due to a strong impact to the sensor or its surrounding area.

(2) When a distance between this vehicle and a guardrail, wall, etc. that enters the detection area is short.

(3) When driving up and down consecutive steep inclines, such as hills, dips in the road, etc.

(4) When vehicle lanes are narrow, or when driving on the edge of a lane, and a vehicle traveling in a lane other than the adjacent lanes enters the detection area.

(5) When driving on roads with sharp bends, consecutive curves, or uneven surfaces.

(6) When the tires are slipping or spinning.

(7) When the distance between this vehicle and a following vehicle is short.

(8) When a bicycle carrier or other accessory is installed to the rear of the vehicle.

(9) When towing a trailer.

(d) The RCTA function may not detect vehicles correctly in the following conditions:

(1) When the sensor is misaligned due to a strong impact to the sensor or its surrounding area.

(2) When mud, snow, ice,a sticker, etc. is covering the sensor or surrounding area on the rear bumper.

(3) When driving on a road surface that is wet with standing water during bad weather such as heavy rain, snow, or fog.

(4) When multiple vehicles are approaching with only a small gap between each vehicle.

(5) When a vehicle is approaching at high speed.

(6) When towing a trailer.

(7) When backing up on a slope with a sharp change in grade.

(8) When backing out of a shallow angle parking spot.

(9) Directly after the RCTA function is turned on

(10) Directly after the engine is started with the RCTA function is turned on

(11) When the sensors cannot detect a vehicle due to obstructions.

(e) The RCTA function is not designed to detect the following types of vehicles or objects:

(1) Vehicles approaching from directly behind.

(2) Vehicles backing up in a parking space next to this vehicle.

(3) Vehicles that the sensors cannot detect due to obstructions.

(4) Guardrails, walls, signs, parked vehicles and similar stationary objects.*

(5) Small motorcycles, bicycles, pedestrians, etc.*

(6) Vehicles moving away from this vehicle.

(7) Vehicles approaching from the parking spaces next to this vehicle.*

HINT:

In this section, the expression "this vehicle" is used to refer to the vehicle equipped with this blind spot monitor system.

*: Depending on conditions, detection of a vehicle and/or object may occur.

(f) Instances of the RCTA function unnecessarily detecting a vehicle and/or object may increase under the following condition:

(1) When a vehicle passes by the side of this vehicle.

(2) When the parking space faces a street and vehicles are being driven on the street.

(3) When the distance between this vehicle and metal objects, such as a guardrail, wall, sign, or parked vehicle, which may reflect electrical waves toward the rear of the vehicle, is short

HINT:

In this section, the expression "this vehicle" is used to refer to the vehicle equipped with this blind spot monitor system.

(g) Under the following conditions, the blind spot monitor system may store DTCs C1AC1 and C1AC2 by mistake:

(1) The vehicle is driven continuously with the blind spot monitor system on when using a drum tester such as a speedometer tester, brake/ speedometer combination tester or chassis dynamometer.

(2) When mud, snow, ice, a sticker, etc. is covering the sensor or surrounding area on the rear bumper.

HANDLING THE RADAR SENSOR

(a) Blind spot monitor sensors are installed behind the left and right sides of the rear bumper respectively. Observe the following to ensure the blind spot monitor can function correctly.

(1) Keep the sensors and the surrounding areas on the rear bumper clean at all times.

(2) Do not subject a sensor or its surrounding area on the rear bumper to a strong impact. If a sensor is moved even slightly off position, the system may malfunction and vehicles may not be detected correctly. In the following situations, inspect the sensor and surrounding area.

A sensor or its surrounding area is subjected to a strong impact.
If the surrounding area of a sensor is scratched or dented, or part of them has become disconnected.

(3) Do not disassemble the sensor.

(4) Do not attach stickers to the sensor or surrounding area on the rear bumper.

(5) Do not modify the sensor or surrounding area on the rear bumper.

(6) Do not paint the rear bumper any color other than an official Toyota color.

(7) Do not drop a sensor or subject it to a strong impact, as it is a high-precision device.

(8) Do not reuse a sensor that has been dropped or subjected to a strong impact.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Entire System

Symptom	Suspected Area	Link
System does not operate at all	Proceed to "Power Source Circuit"
	CAN communication system
	Blind spot monitor sensor RH
System cannot be turned off	CAN communication system
System cannot be turned off	Blind spot monitor sensor RH
"Blind Spot Monitor Unavailable" or "Blind Spot Monitor System Malfunction Visit Your Dealer" is displayed on the multi-information display	Check abnormality history
	Blind spot monitor sensor RH
	Blind spot monitor sensor LH
	Combination meter assembly
"Rear Cross Traffic Alert Unavailable" or "Rear Cross Traffic Alert Malfunction Visit Your Dealer" is displayed on the multi-information display	Check abnormality history
	Blind spot monitor sensor RH
	Blind spot monitor sensor LH
	Combination meter assembly

Blind Spot Monitor Function

Symptom	Suspected Area	Link
Outer rear view mirror indicator RH does not illuminate	Proceed to "Blind Spot Monitor Beam Axis Confirmation"
	Outer mirror RH
	Outer mirror control ECU assembly RH*3
	Outer rear view mirror assembly RH
	Blind spot monitor sensor RH
Outer rear view mirror indicator LH does not illuminate	Proceed to "Blind Spot Monitor Beam Axis Confirmation"
	Outer mirror LH
	Outer mirror control ECU assembly LH*3
	Outer rear view mirror assembly LH
	Blind spot monitor sensor LH
Outer rear view mirror indicator RH remains illuminated	Proceed to "Blind Spot Monitor Beam Axis Confirmation"
Outer rear view mirror indicator RH remains illuminated	Blind spot monitor sensor RH
Outer rear view mirror indicator LH remains illuminated	Proceed to "Blind Spot Monitor Beam Axis Confirmation"
Outer rear view mirror indicator LH remains illuminated	Blind spot monitor sensor LH
Outer rear view mirror indicator RH does not flash	Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section*4
	Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section*5
	Blind spot monitor sensor RH
Outer rear view mirror indicator LH does not flash	Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section*4
	Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section*5
	Blind spot monitor sensor LH
Outer rear view mirror indicator RH continues to flash	Blind spot monitor sensor RH
Outer rear view mirror indicator LH continues to flash	Blind spot monitor sensor LH

RCTA Function

Symptom	Suspected Area	Link
Function does not operate at all (Blind spot monitor function operates normally)	Data list / active test (Reverse)
	Automatic transmission system
	Blind spot monitor sensor LH
While RCTA function is active, outer rear view mirror indicator flashes but RCTA buzzer does not sound.	Proceed to "Buzzer does not Sound"
When shift lever is in R, detection operation is normal but RCTA indicator does not appear on multi-display	CAN communication system
	Blind spot monitor sensor RH
	Blind spot monitor sensor LH
	Radio and display receiver assembly
	Television camera assembly*1
	Parking assist ECU*2

*1: w/ Parking Assist Monitor System
*2: w/ Panoramic View Monitor System
*3: w/ Seat Memory
*4: for HV Model with Cornering Light
*5: for HV Model without Cornering Light

System Description

SYSTEM DESCRIPTION

GENERAL

(a) The blind spot monitor system has a blind spot monitor function and RCTA function.

(1) Blind spot monitor function

The blind spot monitor function is a function that assists the driver when changing lanes.
This function uses quasi-millimeter wave radar to detect vehicles that are traveling in adjacent lanes in the areas that are not visible using the outer rear view mirror assemblies (blind spots) and vehicles that are approaching rapidly from up to 60 m behind this vehicle in the areas that are not visible using the outer rear view mirror assemblies (blind spots).

The function advises the driver of the existence of a vehicle by illuminating the outer rear view mirror indicator on the outer rear view mirror assembly.
If the turn signal switch is operated while the outer rear view mirror indicator on an outer rear view mirror assembly is illuminated, the indicator starts blinking to give additional warning to the driver.

(2) RCTA function

The RCTA function is a function that informs the driver a vehicle is approaching from the left or the right at the rear of the vehicle. The function uses quasi-millimeter wave radar to detect the position and relative speed of other vehicles. When the function determines that a vehicle is approaching this vehicle, this function informs the driver using the outer rear view mirror indicators and blind spot monitor buzzer.

FUNCTION OF COMPONENTS

Component	Function
Blind Spot Monitor Sensor	Consists of a 24 GHz radar module and an integrated processing module. Illuminates or blinks the outer rear view mirror indicator on an outer rear view mirror assembly with cover. Sounds the RCTA buzzer (blind spot monitor buzzer) when the RCTA function is operating. Changes the outer rear view mirror indicator on an outer rear view mirror assembly with cover from illuminated to blinking when a turn signal switch operation signal is received from the combination meter assembly with the blind spot monitor system operating. Dims the outer rear view mirror indicator on the outer rear view mirror assembly with cover. Displays the RCTA icon on the multi-display when the RCTA function is operating.
Outer Rear View Mirror Assembly With Cover Outer Mirror (Outer Rear View Mirror Indicator)	Turns on or blinks the indicator based on a signal from the blind spot monitor sensor.
Steering Pad Switch Assembly	Enables, disables or cuts off the operation of the blind spot monitor system by transmitting switch operation signals to the combination meter assembly.
RCTA Buzzer (Blind Spot Monitor Buzzer)	Sounds based on a signal from the blind spot monitor sensor.
Combination Meter Assembly Multi-information Display	Transmits a turn signal switch operation signal from the headlight dimmer switch assembly to the blind spot monitor sensor via CAN communication. Displays an error message on the multi-information display if the blind spot monitor sensor detects a malfunction while it is operating.
Main Body ECU (Multiplex Network Body ECU)	Transmits the destination information and the dimmer signal to the blind spot monitor sensors via CAN communication.
Skid Control ECU	Transmits a vehicle speed signal to the blind spot monitor sensors via CAN communication.
ECM	Transmits a shift position signal (R) to the blind spot monitor sensors via CAN communication.
Steering Sensor	Detects the angle of the steering wheel and transmits the resulting signals to the blind spot monitor sensors via CAN communication.
Airbag Sensor Assembly Yaw Rate and Acceleration Sensor	Transmits the yaw rate signal to the blind spot monitor sensor via CAN communication.
Television Camera Assembly1 Parking Assist ECU2	Receives the blind spot monitor sensor information via CAN communication and sends it to the multi-display through the video signal cable.
Radio and Display Receiver Assembly	Receives the video signals from the television camera assembly and displays the RCTA icon on the display panel.1 Receives the video signals from the parking assist ECU and displays the RCTA icon on the display panel.2

*1: w/ Parking Assist Monitor System
*2: w/ Panoramic View Monitor System

OPERATION DESCRIPTION

(a) Operation description of the blind spot monitor system

(1) Operation conditions:

The blind spot monitor system is on.
The shift lever is in any position other than R.
Vehicle speed is more than approximately 16 km/h (10 mph).

(2) Conditions in which a sensor can detect a vehicle

The blind spot monitor system indicates detection of a vehicle in the detection area when either condition is met:

When a vehicle is detected in an adjacent lane overtaking this vehicle.
When a vehicle is detected entering the detection area because it changed lanes.

(3) Detection area

Vehicles in the following areas can be detected:

*a	Within Approx. 3.5 m (11.48 ft) from Side of Vehicle
*b	Within Approx. 3 m (9.84 ft) behind Rear Bumper
*c	Within Approx. 1 m (3.28 ft) forward of Rear Bumper
	Detection Area

(b) Operation description of the RCTA function

(1) Operation conditions:

The RCTA function is on.
The shift lever is in R.
The vehicle speed is less than approximately 8 km/h (5 mph).

(2) Conditions in which a sensor can detect a vehicle

The RCTA function indicates detection of a vehicle in the detection area when both conditions are met:

A vehicle is approaching from the right or left at the rear of the vehicle.
The vehicle speed is approximately 8 km/h (5 mph) to 28 km/h (18 mph).

(3) Detection area

Vehicles in the following areas can be detected:

*a	Within Approx. 5.5 to 20 m (18.05 to 65.62 ft) from Side of Vehicle (detection area changes according to vehicle speed)
*b	Within Approx. 6 m (19.69 ft) behind Rear Bumper
	Detection Area

OPERATION OF OUTER REAR VIEW MIRROR INDICATOR AND RCTA BUZZER (BLIND SPOT MONITOR BUZZER)

(a) Initial check

(1) When the blind spot monitor system is turned on with the engine switch on (IG), the outer rear view mirror indicators on the outer rear view mirror assembly with cover illuminate for 3 seconds.

(2) When the RCTA function is turned on with the engine switch on (IG), the outer rear view mirror indicators on the outer rear view mirror assembly with cover illuminate for 3 seconds and the RCTA buzzer (blind spot monitor buzzer) sounds for 1 second.

(3) When the engine switch is turned from off to ON with the blind spot monitor system on, the outer rear view mirror indicators on the outer rear view mirror assembly with cover illuminate for 3 seconds.

(b) Operation for each function

(1) Operation for blind spot monitor system

When a sensor detects a vehicle in the blind spot area, the outer rear view mirror indicator on the outer rear view mirror assembly with cover illuminates.
If the turn signal switch is operated while the sensor is detecting a vehicle in the detection area and the outer rear view mirror indicator on the outer rear view mirror assembly with cover is illuminated, the indicator starts blinking as shown in the illustration.

(2) Operation for RCTA function

When all of the operation conditions for the RCTA function are met, the outer rear view mirror indicators on the outer rear view mirror assembly with cover blink for 2.5 seconds and the RCTA buzzer (blind spot monitor buzzer) sounds for 2.3 seconds as shown in the illustration.

*a	0.125 Seconds	*b	2.5 Seconds
*c	0.1 Seconds	*d	0.4 Seconds
*e	2.3 Seconds	-	-

RCTA ICON OUTLINE

(a) If a vehicle approaching from the right or left at the rear of the vehicle is detected, the icon will illuminate on the multi-display.

w/ Parking Assist Monitor System

*a	Narrow rear view screen	*b	Wide Rear View Screen
*c	RCTA Icon	-	-

w/ Panoramic View Monitor System

*a	Narrow rear view screen	*b	Wide Rear View Screen
*c	Panoramic view and rear view screen	*d	RCTA Icon

System Diagram

SYSTEM DIAGRAM

w/o Seat Memory

w/ Seat Memory

Terminals Of Ecu

TERMINALS OF ECU

BLIND SPOT MONITOR SENSOR RH (MASTER)

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
P5-4 (OMIR) - P5-10 (BRGD)	R - W-B	Outer rear view mirror indicator RH power source	Outer rear view mirror indicator RH illuminated	3.5 to 9.5 V
			Outer rear view mirror indicator RH blinking	Alternating between 0 to 9.5 V
			Outer rear view mirror indicator RH not illuminated	Below 1 V
P5-5 (BRB) - P5-10 (BRGD)	B - W-B	IG power source	Engine switch off	Below 1 V
P5-5 (BRB) - P5-10 (BRGD)	B - W-B	IG power source	Engine switch on (IG)	11 to 14 V
P5-10 (BRGD) - Body Ground	W-B - Body ground	Ground	Always	Below 1 V

BLIND SPOT MONITOR SENSOR LH (SLAVE)

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
P6-3 (BUZ) - P6-10 (BLGD)	W - W-B	RCTA buzzer (blind spot monitor buzzer) operation signal	RCTA buzzer (blind spot monitor buzzer) not sounding	11 to 14 V
P6-3 (BUZ) - P6-10 (BLGD)	W - W-B	RCTA buzzer (blind spot monitor buzzer) operation signal	RCTA buzzer (blind spot monitor buzzer) sounding	Alternating between 0 to 14 V
P6-4 (OMIL) - P6-10 (BLGD)	R - W-B	Outer rear view mirror indicator LH power source	Outer rear view mirror indicator LH illuminated	3.5 to 9.5 V
			Outer rear view mirror indicator LH blinking	Alternating between 0 to 9.5 V
			Outer rear view mirror indicator LH not illuminated	Below 1 V
P6-5 (BLB) - P6-10 (BLGD)	B - W-B	IG power source	Engine switch off	Below 1 V
P6-5 (BLB) - P6-10 (BLGD)	B - W-B	IG power source	Engine switch on (IG)	11 to 14 V
P6-10 (BLGD) - Body Ground	W-B - Body ground	Ground	Always	Below 1 V

Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129,U0142)

DESCRIPTION

These DTCs are stored if there is a malfunction in the CAN communication system connected to the blind spot monitor sensor.

HINT:

If CAN communication system DTCs are stored, they may also be stored for other systems.

Blind Spot Monitor Master

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0100	Lost Communication with ECM / PCM "A"	Lost communication with ECM	CAN communication system
U0125	Lost Communication with Yaw Rate Sensor Module	Lost communication with airbag sensor assembly	CAN communication system
U0126	Lost Communication with Steering Angle Sensor Module	Lost communication with steering sensor	CAN communication system
U0129	Lost Communication with Brake System Control Module	Lost communication with brake system	CAN communication system
U0142	Lost Communication with Body Control Module "B"	Lost communication with main body ECU	CAN communication system

Blind Spot Monitor Slave

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0100	Lost Communication with ECM / PCM "A"	Lost communication with ECM	CAN communication system
U0125	Lost Communication with Yaw Rate Sensor Module	Lost communication with airbag sensor assembly	CAN communication system
U0126	Lost Communication with Steering Angle Sensor Module	Lost communication with steering sensor	CAN communication system
U0129	Lost Communication with Brake System Control Module	Lost communication with brake system	CAN communication system
U0142	Lost Communication with Body Control Module "B"	Lost communication with main body ECU	CAN communication system

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result	Proceed to
Blind Spot Monitor Master DTCs including DTC U0232 are output.	A
Blind Spot Monitor Master DTCs other than DTC U0232 are output.	B
No DTCs are output	C

HINT:

If CAN communication system DTCs are stored, they may also be stored for other systems.
If the CAN communication system has been inspected and repaired, the DTCs will not be output when rechecking for DTCs.
If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.
Click here

GO TO DTC U0232

GO TO CAN COMMUNICATION SYSTEM

USE SIMULATION METHOD TO CHECK

Lost Communication with Blind Spot Monitor Slave Module (U0232)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor RH judges that there is a communication problem with the blind spot monitor sensor LH.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0232	Lost Communication with Blind Spot Monitor Slave Module	The blind spot monitor sensor (master) cannot receive signals from the blind spot monitor sensor (slave)	Open or short in CAN bus main wire or connector Open or short in NO. 26 junction connector Blind spot monitor sensor LH Power source circuit of blind spot monitor sensor LH Blind spot monitor sensor LH ground circuit Blind spot monitor sensor RH Wire harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.
Inspect the fuses for circuits related to this system before performing the following procedure.
Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
Click here

HINT:

Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

1.	CHECK CAN BUS MAIN WIRE

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

Standard Resistance:

Tester Connection	Condition	Specified Condition	Result
P5-1 (CA2P) - P5-6 (CA2N)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
P5-1 (CA2P) - P5-6 (CA2N)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	70 Ω or more: Open circuit in main bus lines
P5-1 (CA2P) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CA2P short to ground
P5-6 (CA2N) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CA2N short to ground
P5-1 (CA2P) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CA2P +B short
P5-6 (CA2N) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CA2N +B short

DLC3

Component with harness connected

(Blind Spot Monitor Sensor RH)

(d) Reconnect the cable to the negative (-) battery terminal.

Result	Proceed to
OK	A
Open circuit in CAN main bus lines	B
Short circuit between bus lines	C
Short to ground +B short	D

GO TO STEP 5

GO TO STEP 8

GO TO STEP 11

2.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BODY GROUND)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - POWER SOURCE)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK DTC

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

No DTCs are output.

SYMPTOM SIMULATION

REPLACE BLIND SPOT MONITOR SENSOR LH

5.	CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 26 JUNCTION CONNECTOR)

(a) Disconnect the K68 No. 26 junction connector.

Front view of wire harness connector

(to No. 26 Junction Connector)

to Blind Spot Monitor Sensor RH CAN main wire

to Blind Spot Monitor Sensor LH CAN main wire

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K68-3 (CANH) - K68-14(CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
K68-2 (CANH) - K68-13(CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result	Proceed to
OK	A
NG (to blind spot monitor sensor RH CAN main wire)	B
NG (to blind spot monitor sensor LH CAN main wire)	C

REPLACE NO. 26 JUNCTION CONNECTOR

GO TO STEP 7

6.	CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH)

(a) Reconnect the K68 No. 26 junction connector.

(b) Disconnect the P5 blind spot monitor sensor RH connector.

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
P5-1 (CA2P) - P5-6 (CA2N)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 26 JUNCTION CONNECTOR)

7.	CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH)

(a) Reconnect the K68 No. 26 junction connector.

(b) Disconnect the P6 blind spot monitor sensor LH connector.

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor LH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
P6-1 (CA2P) - P6-6 (CA2N)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR LH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 26 JUNCTION CONNECTOR)

8.	CHECK FOR SHORT IN CAN BUS WIRES (NO. 26 JUNCTION CONNECTOR)

(a) Disconnect the K68 No. 26 junction connector.

Front view of wire harness connector

(to No. 26 Junction Connector)

to Blind Spot Monitor Sensor RH CAN main wire

to Blind Spot Monitor Sensor LH CAN main wire

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K68-3 (CANH) - K68-14 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω
K68-2 (CANH) - K68-13 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result	Proceed to
OK	A
NG (to blind spot monitor sensor RH CAN main wire)	B
NG (to blind spot monitor sensor LH CAN main wire)	C

REPLACE NO. 26 JUNCTION CONNECTOR

GO TO STEP 10

9.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH)

(a) Reconnect the K68 No. 26 junction connector.

(b) Disconnect the P5 blind spot monitor sensor RH connector.

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
P5-1 (CA2P) - P5-6 (CA2N)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 26 JUNCTION CONNECTOR)

10.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)

(a) Reconnect the K68 No. 26 junction connector.

(b) Disconnect the P6 blind spot monitor sensor LH connector.

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor LH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
P6-1 (CA2P) - P6-6 (CA2N)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR LH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 26 JUNCTION CONNECTOR)

11.	CHECK FOR SHORT IN CAN BUS WIRES (NO. 26 JUNCTION CONNECTOR)

(a) Disconnect the K68 No. 26 junction connector.

(b) Measure the resistance according to the value(s) in the table below.

DLC3

Front view of wire harness connector

(to No. 26 Junction Connector)

to Blind Spot Monitor Sensor RH CAN main wire

to Blind Spot Monitor Sensor LH CAN main wire

Standard Resistance:

Tester Connection	Condition	Specified Condition
K68-3 (CANH) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
K68-14 (CANL) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
K68-3 (CANH) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
K68-14 (CANL) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
K68-2 (CANH) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
K68-13 (CANL) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
K68-2 (CANH) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
K68-13 (CANL) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

Result	Proceed to
OK	A
NG (to blind spot monitor sensor RH CAN main wire)	B
NG (to blind spot monitor sensor LH CAN main wire)	C

REPLACE NO. 26 JUNCTION CONNECTOR

GO TO STEP 13

12.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH)

(a) Reconnect the K68 No. 26 junction connector.

(b) Disconnect the P5 blind spot monitor sensor RH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P5-1 (CA2P) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
P5-6 (CA2N) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
P5-1 (CA2P) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
P5-6 (CA2N) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

DLC3

Front view of wire harness connector

(to Blind Spot Monitor Sensor RH)

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 26 JUNCTION CONNECTOR)

13.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)

(a) Reconnect the K68 No. 26 junction connector.

(b) Disconnect the P6 blind spot monitor sensor LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P6-1 (CA2P) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
P6-6 (CA2N) - G45-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
P6-1 (CA2P) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
P6-6 (CA2N) - G45-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

DLC3

Front view of wire harness connector

(to Blind Spot Monitor Sensor LH)

REPLACE BLIND SPOT MONITOR SENSOR LH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 26 JUNCTION CONNECTOR)

Lost Communication with Blind Spot Monitor Master Module (U0233)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0233	Lost Communication with Blind Spot Monitor Master Module	The blind spot monitor sensor (slave) cannot receive signals from the blind spot monitor sensor (master)	Blind spot monitor sensor RH Blind spot monitor sensor LH Wire harness or connector

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

HINT:

Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

1.	CHECK DTC OUTPUT

(a) Turn the engine switch off.

(b) Turn the engine switch on (IG).

Body Electrical > Blind Spot Monitor Slave > Clear DTCs

(d) Check for DTCs.

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result	Proceed to
DTC U0233 is output	A
No DTCs are output	B

USE SIMULATION METHOD TO CHECK

2.	REPLACE BLIND SPOT MONITOR SENSOR RH

Click here

3.	CHECK DTC OUTPUT

(a) Check for DTCs.

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result	Proceed to
DTC U0233 is output	A
No DTCs are output	B

REPLACE BLIND SPOT MONITOR SENSOR LH

END (BLIND SPOT MONITOR SENSOR RH WAS DEFECTIVE)

Software Incompatibility with Body Control Module "B" (U1331)

DESCRIPTION

This DTC is stored when the destination information of the main body ECU (multiplex network body ECU) does not match that of the blind spot monitor sensors.

Blind Spot Monitor Master

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U1331	Software Incompatibility with Body Control Module "B"	Destination information of the main body ECU and blind spot monitor sensor do not match	Main body ECU (multiplex network body ECU) Blind spot monitor sensor RH

Blind Spot Monitor Slave

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U1331	Software Incompatibility with Body Control Module "B"	Destination information of the main body ECU and blind spot monitor sensor do not match	Main body ECU (multiplex network body ECU) Blind spot monitor sensor LH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is on.
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
w/ Smart Key System: Click here

PROCEDURE

1.	CONFIRM PART NUMBER (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Check the main body ECU (multiplex network body ECU) part number.

(1) Check if the part number of the main body ECU (multiplex network body ECU) installed on the vehicle is correct.

OK:

The part number is correct.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Blind Spot Monitor Master > Clear DTCs Body Electrical > Blind Spot Monitor Slave > Clear DTCs

(b) Recheck for DTCs and check if the same DTC is output again.

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result	Proceed to
No DTCs are output	A
DTC U1331 is output ("Blind Spot Monitor Master")	B
DTC U1331 is output ("Blind Spot Monitor Slave")	C

USE SIMULATION METHOD TO CHECK

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE BLIND SPOT MONITOR SENSOR LH

Blind Spot Monitor Sensor

Clearance Warning Buzzer(for Front)

See More:

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