Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: How To Proceed With Troubleshooting

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Cruise Control / Dynamic Radar Cruise Control System(for Gasoline Model) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Perform the following procedure to troubleshoot the dynamic radar cruise control system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

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.

NEXT

3.

INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY*

(a) Adjust the reflector height.

Click here

(b) Place the reflector.

Click here

(c) Connect the Techstream to the DLC3.

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

(e) Turn the Techstream on.

(f) Turn the cruise control main switch on.

(g) Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Misalignment Reading.

(h) Check the amount of misalignment and make a note.

Body Electrical > Pre-Collision 2 > Utility

Tester Display

Front Beam Axis Misalignment Reading

(i) Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Offset Reading.

(j) Check the amount of misalignment and make a note.

Body Electrical > Pre-Collision 2 > Utility

Tester Display

Front Beam Axis Offset Reading

(k) Calculate the "Dealership Axis Offset Angle (with On-line Calibration Angle)" using the values "Front Beam Axis Misalignment Reading" and "Front Beam Axis Offset Reading".

(1) "Dealership Axis Offset Angle (with On-line Calibration Angle)" = "Front Beam Axis Misalignment Reading" - "Front Beam Axis Offset Reading"

Standard:

Dealership Axis Offset Angle (with On-line Calibration Angle)

Vertical

-2.2 to 1.6 deg.

Horizontal

-0.6 to 0.6 deg.

Result

Proceed to

The dealership axis offset angle (with on-line calibration angle) is within the specified range.

A

The dealership axis offset angle (with on-line calibration angle) is not within the specified range.

B
B

GO TO STEP 12

A

4.

CHECK CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check that the CAN communication system is functioning normally.

Click here

OK:

CAN communication system is functioning normally.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

5.

CHECK METER / GAUGE SYSTEM*

(a) Check for DTCs.

Body Electrical > Combination Meter > Trouble Codes

Result

Proceed to

Meter/gauge system DTCs are not output

A

Meter/gauge system DTCs are output

B
B

GO TO METER / GAUGE SYSTEM

A

6.

CHECK ELECTRONICALLY CONTROLLED BRAKE SYSTEM AND ELECTRIC PARKING BRAKE SYSTEM*

(a) Check for DTCs.

Chassis > ABS/VSC/TRAC/EPB > Trouble Codes

Result

Proceed to

Electronically controlled brake system and electric parking brake system DTCs are not output

A

Electronically controlled brake system DTCs are output

B

Electric parking brake system DTCs are output

C
B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

C

GO TO ELECTRIC PARKING BRAKE SYSTEM

A

7.

CHECK FOR DTCs*

(a) Check for DTCs and note any codes that are output.

Powertrain > Radar Cruise1 > Trouble Codes Powertrain > Radar Cruise2 > Trouble Codes

(b) Clear the DTCs.

Powertrain > Radar Cruise1 > Clear DTCs Powertrain > Radar Cruise2 > Clear DTCs

(c) Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.

Powertrain > Radar Cruise1 > Trouble Codes Powertrain > Radar Cruise2 > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO DTC CHART

A

8.

PROBLEM SYMPTOMS TABLE

HINT:

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
B

ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE
A

9.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test

Click here

(b) Road test

Click here

(c) Operation check

Click here

(d) Terminals of ECU

Click here

NEXT

10.

ADJUST, REPAIR OR REPLACE

NOTICE:

When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.

Click here

NEXT

11.

CONFIRMATION TEST
NEXT

END

12.

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Perform millimeter wave radar sensor assembly adjustment.

Click here

NEXT

GO TO STEP 4

    Freeze Frame Data

    Operation Check

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