B1125

DTC Troubleshooting: B1125, B1126

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

DTC B1126: Driver's Power Window Motor B Pulse 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), or press the engine start/stop button to select the OFF mode and then the ON mode.

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. Driver's Power Window Motor Test If the motor tests OK, go to step 4.


4. Check for DTCs with the HDS.

Are DTCs 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 DATA LIST.

6. Check the DETECT/NONE information of the driver's window motor A-phase pulse 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. Power Window Master Switch Replacement

NO - Go to step 7.


7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

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

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

10. Check for continuity between terminals No. 3, No. 20, and No. 22 of door multiplex control unit 37P connector and terminals No. 5, No. 3, and No. 6 of the driver's power window motor 6P connector.

Is there continuity?
YES - Go to step 11.

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






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

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

NO - Go to step 12.






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

Is the motor OK?
YES - Replace the power window master switch. Power Window Master Switch Replacement

NO - Replace the driver's power window motor. Service and Repair