Toyota Tacoma (2015-2018) Service Manual: Sensor (Motor) Failure (B2341,B2344)

Toyota Tacoma (2015-2018) Service Manual / Sliding Roof / Sliding Roof System / Sensor (Motor) Failure (B2341,B2344)

DESCRIPTION

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

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When the sliding roof ECU (sliding roof drive gear sub-assembly) is removed and reinstalled or replaced, it requires initialization (See page ).
The sliding roof system uses the CAN and LIN communication systems. First, confirm that there are no malfunctions in the CAN and LIN communication systems. Refer to the How to Proceed with Troubleshooting procedure (See page ).

PROCEDURE

1.	CHECK SLIDING ROOF OPERATION

(a) Check the sliding roof auto operation (See page OK: ).

OK:

Auto operation operates normally.

GO TO STEP 3

2.	CHECK DTC OUTPUT

(a) Clear the DTCs (See page (b) Check for DTCs. ).

(b) Check for DTCs.

OK:

DTC B2341 or B2344 is not output.

USE SIMULATION METHOD TO CHECK

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

3.	INITIALIZE SLIDING ROOF ECU (SLIDING ROOF HOUSING SUB-ASSEMBLY)

(a) Check that the sliding roof ECU (sliding roof drive gear sub-assembly) can be initialized (See page OK: ).

OK:

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

GO TO STEP 5

4.	CHECK DTC OUTPUT

(a) Clear the DTCs (See page (b) Check for DTCs. ).

(b) Check for DTCs.

OK:

DTC B2341 or B2344 is not output.

END (PROBLEM DUE TO INITIALIZATION FAILURE)

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

5.	CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - SLIDING ROOF SWITCH AND BODY GROUND)

(a) Disconnect the R44 sliding roof switch (roof console box assembly) connector.

(b) Disconnect the S50 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
S50-5 (CLS) - R44-18 (CLS)	Always	Below 1 Ω
S50-5 (CLS) - Body ground	Always	10 kΩ or higher
S50-7 (OPN) - R44-19 (OPN)	Always	Below 1 Ω
S50-7 (OPN) - Body ground	Always	10 kΩ or higher
S50-6 (DWN) - R44-20 (DOWN)	Always	Below 1 Ω
S50-6 (DWN) - Body ground	Always	10 kΩ or higher
S50-4 (UP) - R44-17 (UP)	Always	Below 1 Ω
S50-4 (UP) - Body ground	Always	10 kΩ or higher
R44-12 (GND) - Body ground	Always	Below 1 Ω
S50-12 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

(a) Remove the sliding roof switch (roof console box assembly) (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
17 (UP) - 12 (GND)	UP switch is pressed	Below 1 Ω
17 (UP) - 12 (GND)	UP switch is not pressed	10 kΩ or higher
20 (DOWN) - 12 (GND)	DOWN switch is pressed	Below 1 Ω
20 (DOWN) - 12 (GND)	DOWN switch is not pressed	10 kΩ or higher
19 (OPN) - 12 (GND)	OPEN switch is pressed	Below 1 Ω
19 (OPN) - 12 (GND)	OPEN switch is not pressed	10 kΩ or higher
18 (CLS) - 12 (GND)	CLOSE switch is pressed	Below 1 Ω
18 (CLS) - 12 (GND)	CLOSE switch is not pressed	10 kΩ or higher

Text in Illustration

*a	Component without harness connected (Sliding Roof Switch (Roof Console Box Assembly))

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

REPLACE SLIDING ROOF SWITCH (ROOF CONSOLE BOX ASSEMBLY)

Diagnostic Trouble Code Chart

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