Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Sensor (Motor) Failure (B2341,B2344)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Sliding Roof / Convertible / Sliding Roof System(for Gasoline Model) / Sensor (Motor) Failure (B2341,B2344)

DESCRIPTION

When the sliding roof ECU (sliding roof drive gear assembly) detects a motor malfunction and the sliding roof operation is stopped, DTC B2341 is stored.

When the sliding roof ECU (sliding roof drive gear assembly) detects a gear position malfunction and the sliding roof operation is stopped, DTC B2344 is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2341	Sensor (Motor) Failure	Sensor (motor) failure (The sliding roof ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the motor)	Sliding roof ECU (Sliding roof drive gear assembly) Sliding roof switch (Roof console box sub-assembly) Wire harness or connector
B2344	Position Failure	Position failure (The sliding roof ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the gear position)	Sliding roof ECU (Sliding roof drive gear assembly) Sliding roof switch (Roof console box sub-assembly) Wire harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the sliding roof ECU (sliding roof drive gear assembly) is removed and reinstalled or replaced, the sliding roof ECU (sliding roof drive gear assembly) must be initialized.

Click here

PROCEDURE

1.	CHECK SLIDING ROOF OPERATION

(a) Check the sliding roof auto operation.

Click here

OK:

Auto operation operates normally.

GO TO STEP 3

2.	CHECK DTC OUTPUT

(a) Clear the DTCs.

Body Electrical > Sliding Roof > Clear DTCs

(b) Check for DTCs.

Body Electrical > Sliding Roof > Trouble Codes

OK:

DTCs B2341 and B2344 are not output.

USE SIMULATION METHOD TO CHECK

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

3.	INITIALIZE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

(a) Check that the sliding roof ECU (sliding roof drive gear assembly) can be initialized.

Click here

OK:

Sliding roof ECU (sliding roof drive gear assembly) can be initialized.

GO TO STEP 5

4.	CHECK DTC OUTPUT

(a) Clear the DTCs.

Body Electrical > Sliding Roof > Clear DTCs

(b) Check for DTCs.

Body Electrical > Sliding Roof > Trouble Codes

OK:

DTCs B2341 and B2344 are not output.

END (MALFUNCTION DUE TO INITIALIZATION FAILURE)

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

5.	CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) - SLIDING ROOF SWITCH (ROOF CONSOLE BOX SUB-ASSEMBLY) AND BODY GROUND)

(a) Disconnect the O10 sliding roof switch (roof console box sub-assembly) connector.

(b) Disconnect the O3 sliding roof ECU (sliding roof drive gear assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
O3-8 (CLS) - O10-4 (CLS)	Always	Below 1 Ω
O3-8 (CLS) or O10-4 (CLS) - Body ground	Always	10 kΩ or higher
O3-10 (OPN) - O10-5 (OPN)	Always	Below 1 Ω
O3-10 (OPN) or O10-5 (OPN) - Body ground	Always	10 kΩ or higher
O3-9 (DWN) - O10-18 (DOWN)	Always	Below 1 Ω
O3-9 (DWN) or O10-18 (DOWN) - Body ground	Always	10 kΩ or higher
O3-5 (UP) - O10-3 (UP)	Always	Below 1 Ω
O3-5 (UP) or O10-3 (UP) - Body ground	Always	10 kΩ or higher
O10-15 (GND) - Body ground	Always	Below 1 Ω
O3-2 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	INSPECT SLIDING ROOF SWITCH (ROOF CONSOLE BOX SUB-ASSEMBLY)

(a) Remove the sliding roof switch (roof console box sub-assembly).

Click here

(b) Inspect the sliding roof switch (roof console box sub-assembly).

Click here

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

REPLACE SLIDING ROOF SWITCH (ROOF CONSOLE BOX SUB-ASSEMBLY)

Sliding Roof System(for Gasoline Model)

Switch Failure (B2342)

See More:

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