B1077

DTC Troubleshooting: B1077

DTC B1077:

Windshield Wiper Motor (Park) Signal 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. Turn the windshield wiper switch to LOW or HIGH for at least 15 seconds, then turn the switch OFF.

Does the wiper motor work?

YES -

Go to step 4.

NO -

Go to step 13.

4. Check for DTCs with the HDS.

Is DTC B1077 indicated?

YES -

Go to step 5.

NO -

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

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

6. Do the windshield wiper motor test Wiper Motor Test.

Does the wiper motor run and does it pulse normally?

YES -

Go to step 7.

NO -

Replace the windshield wiper motor, and recheck.

7. Disconnect the windshield wiper motor 5P connector.

8. Disconnect the under-dash fuse/relay box connector B (36P).

9. Check for continuity between windshield wiper motor 5P connector terminal No. 1 and under-dash fuse/relay box connector B (36P) terminal No. 20.





Is there continuity?

YES -

Go to step 10.

NO -

Repair an open or high resistance in the wire.

10. Check for continuity between the windshield wiper motor 5P connector terminal No. 1 and body ground.





Is there continuity?

YES -

Repair a short to ground in the wire.

NO -

Go to step 11.

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

12. Measure the voltage between the windshield wiper motor 5P connector terminal No. 1 and body ground.





Is there voltage?

YES -

Repair a short to power in the wire.

NO -

Faulty MICU; replace the under-dash fuse/relay box.

- USA model Under-Dash Fuse/Relay Box Removal and Installation (USA Models)
- Canada model Under-Dash Fuse/Relay Box Removal and Installation (Canada Models)

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

14. Check the No. 56 (30 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 15.

NO -

Replace the fuse, and recheck the system.

15. Do the windshield wiper motor test Wiper Motor Test.

Does the wiper motor run normally?

YES -

Go to step 16.

NO -

Replace the windshield wiper motor, and recheck.

16. Disconnect under-dash fuse/relay box connector A (36P) and the windshield wiper motor 5P connector.

17. Check for continuity between the under-dash fuse/relay box connector A (36P) terminals and the windshield wiper motor 5P connector terminals as shown:









Is there continuity?

YES -

Go to step 18.

NO -

Repair an open or high resistance in the (LOW) or (HIGH) wire.

18. Check for continuity between windshield wiper motor 5P connector terminal No. 4 and body ground.





Is there continuity?

YES -

Faulty MICU; replace the under-dash fuse/relay box.

- USA model Under-Dash Fuse/Relay Box Removal and Installation (USA Models)
- Canada model Under-Dash Fuse/Relay Box Removal and Installation (Canada Models)

NO -

Repair an open or high resistance in the wire or poor ground (G401).