B1028

DTC Troubleshooting: B1028

DTC B1028:

Rear Wiper Auto Stop Switch Malfunction

NOTE: If you are troubleshooting multiple DTC's, be sure to follow the instruction 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. Operate the rear window wiper for at least 15 seconds, then turn the rear window wiper switch OFF.

4. Check for DTCs with the HDS.

Is DTC B1028 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.�

5. Check the No. 16 (10 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 6.

NO -

Replace the fuse, and recheck the system.�

6. Disconnect the rear window wiper motor 4P connector.

7. Turn the ignition switch to ON (II).

8. Measure the voltage between rear window wiper motor 4P connector terminal No. 1 and body ground.





Is there battery voltage?

YES -

Go to step 9.

NO -

Repair open in the wire between the under-dash fuse/relay box and the rear window wiper motor.�

9. Check for continuity between rear window wiper motor 4P connector terminal No. 4 and body ground.





Is there continuity?

YES -

Go to step 10.

NO -

Repair open in the wire between rear window wiper motor 4P connector terminal No. 4 and body ground (G602).�

10. Do the rear window wiper motor test Wiper Motor Test.

Is the rear window wiper motor OK?

YES -

Go to step 11.

NO -

Replace the rear window wiper motor.�

11. Disconnect under-dash fuse/relay box connector C.

12. Measure the voltage between rear window wiper motor 4P connector terminal No. 3 and body ground.





Is there battery voltage?

YES -

Repair short to power in the wire between the rear window wiper motor and the under-dash fuse/relay box.�

NO -

Go to step 13.

13. Check for continuity between rear window wiper motor 4P connector terminal No. 3 and body ground.





Is there continuity?

YES -

Repair short to ground in the wire between the rear window wiper motor and the under-dash fuse/relay box.�

NO -

Go to step 14.

14. Check for continuity between under-dash fuse/relay box connector C (49P) terminal No. 29 and rear window wiper rear window wiper motor 4P connector terminal No. 3.





Is there continuity?

YES -

Faulty MICU, replace the under-dash fuse/relay box Under-dash Fuse/Relay Box Removal And Installation (USA Models).�

NO -

Repair open in the wire between the rear window wiper motor and the under-dash fuse/relay box.�