B2178
DTC B2178: Front Passenger's Window Motor Pulse B ErrorNOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test mode A.
1. Turn the ignition switch ON (II).
2. Open and close the front passenger's window by using the front passenger's power window switch manually.
3. Check for DTCs with the HDS.
Is DTC B2178 indicated?
YES - Go to step 4.
NO - Intermittent failure. The system is OK at this time. Check for loose or poor connections.
4. Open and close the front passenger's window by using the front passenger's window switch manually.
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 Front passenger's window motor B-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 passenger's MPCS unit.
NO - Go to step 7.
7. Turn the ignition switch OFF.
8. Disconnect the 14P connector from the passenger's MPCS unit.
9. Disconnect the 6P connector from the front passenger's window motor.
10. Check for continuity between passenger's MPCS unit connector B (14P) terminal No. 4 and front passenger's window motor 6P connector terminal No. 4.
Is there continuity?
YES - Go to step 11.
NO - Repair an open in the wire.
11. Check for continuity between front passenger's window motor 6P connector terminal No. 4 and body ground.
Is there continuity?
YES - Repair a short in the wire.
NO - Go to step 12.
12. Test the power window motor.
Is the motor OK?
YES - Replace the passenger's MPCS unit.
NO - Replace the front passenger's window motor.