Toyota Tacoma manuals

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

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. ).
  • 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.

NG

GO TO STEP 3

OK

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.

OK

USE SIMULATION METHOD TO CHECK

NG

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.

NG

GO TO STEP 5

OK

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.

OK

END (PROBLEM DUE TO INITIALIZATION FAILURE)

NG

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.

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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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))

OK

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

NG

REPLACE SLIDING ROOF SWITCH (ROOF CONSOLE BOX ASSEMBLY)

Diagnostic Trouble Code Chart
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