B1077

DTC Troubleshooting: B1077

DTC B1077:

Wiper Switch (As) Malfunction

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 wiper switch to LOW, then HIGH, for at least 15 seconds in each position.

4. Check for DTCs with the HDS.

Is DTC B1077 indicated?

YES -

Go to step 5.

NO -

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

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

6. Test the wiper motor Wiper Motor Test.

Does the wiper motor operate correctly?

YES -

Go to step 7.

NO -

Replace the windshield wiper motor and recheck.�

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

8. Turn the wiper switch to LOW, then HIGH, and check wiper operation.

Do the wipers operate normally?

YES -

Go to step 9.

NO -

Go to step 12.

9. Disconnect under-hood fuse/relay box connector K (5P) and the windshield wiper motor 5P connector.

10. Check for continuity between windshield wiper motor 5P connector terminal No. 4 and under-hood fuse/relay box connector K (5P) terminal No. 5.





Is there continuity?

YES -

Go to step 11.

NO -

Repair an open or high resistance in the WHT wire.�

11. Check for continuity between under-hood fuse/relay box connector K (5P) terminal No. 5 and body ground.





Is there continuity?

YES -

Repair a short in the wire.�

NO -

Faulty relay control module; replace the under-hood fuse/relay box Under-Hood Fuse/Relay Box Removal and Installation.�

12. Turn the ignition switch to LOCK (0) and check the No. 11 (7.5 A) fuse in the driver's under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 13.

NO -

Replace the blown fuse and recheck the system.�

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

14. Measure the voltage between windshield wiper motor 5P connector terminal No. 2 and body ground.





Is there battery voltage?

YES -

Go to step 15.

NO -

Check the No. 9 (30 A) fuse in the under-hood fuse/relay box. If the fuse is OK, repair an open or high resistance in the RED wire, or replace the faulty windshield wiper motor relay in the under-hood fuse/relay box.�

15. Check for continuity between windshield wiper motor 5P connector terminals No. 3 and No. 5 and under-hood fuse/relay box connector K (5P) terminals No. 2 and No. 4 respectively.





Is there continuity?

YES -

Faulty relay control module; replace the under-hood fuse/relay box Under-Hood Fuse/Relay Box Removal and Installation.�

NO -

Repair an open or high resistance in the BLU or YEL wire.�