B1126

DTC Troubleshooting: B1125, B1126

DTC B1125: Driver's Power Window Motor Pulse A Error

DTC B1126: Driver's Power Window Motor Pulse B Error

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Open and close the driver's power window by using the power window master switch manually.

Does the window motor operate?
YES - Go to step 4.

NO - Test the driver's power window motor. Drivers Power Window Motor Test


4. Check for DTCs with the HDS.

Are DTC B1125 and/or B1126 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.


5. Select the POWER WINDOWS from the BODY ELECTRICAL system select menu, and enter the DATA LIST.

6. Check the DETECT/NONE information of the driver's window motor A-phase and B-phase signal in the DATA LIST.

Does the information indicator display DETECT while the window is moving, and display NONE when the window is stopped?
YES - Replace the power window master switch.

NO - Go to step 7.


7. Turn the ignition switch to LOCK (0).

8. Disconnect the door multiplex control unit 37P connector.

9. Disconnect the driver's power window motor 6P connector.

10. Check for continuity between the door multiplex control unit 37P connector terminals and driver's power window motor 6P connector terminals as shown:





Is there continuity?
YES - Go to step 11.

NO - Repair an open in the wire between the door multiplex control unit and the driver's power window motor.






11. Check for continuity between the terminals No. 3, No. 5, and No. 6 of the driver's power window motor 6P connector and body ground.

Is there continuity?
YES - Repair a short to ground in the wire.

NO - Go to step 12.






12. Test the driver's power window motor. Drivers Power Window Motor Test

Is the motor OK?
YES - Replace the power window master switch.

NO - Replace the driver's power window motor.