B1077

DTC Troubleshooting: B1077

DTC B1077: Windshield Wiper Auto Switch Circuit Malfunction

1. Turn the ignition switch to ON (II), and the windshield wiper switch ON.

2. Check the windshield wiper operation.

Does the wiper work?
YES - Go to step 3.

NO - Go to step 13.


3. Clear the DTC with the HDS.

4. Turn the ignition switch to LOCK (0) and then back ON (II).

5. Turn the windshield wiper switch ON, and then OFF.

6. Check for DTCs with the HDS.

Is DTC B1077 indicated?
YES - Go to step 7.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.


7. Select BODY ELECTRICAL system select menu, then enter the DATA LIST menu.

8. Check the ON/OFF information of the FR WIPER AS with the HDS.

Is OFF indicated when the motor is stopped, and ON intermittently indicated when the motor runs?
YES - Faulty relay control module, replace the under-hood fuse/relay box. Under-Hood Fuse/Relay Box Removal and Installation

NO - Go to step 9.


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

10. Disconnect the windshield wiper motor 5P connector.

11. Disconnect under-hood fuse/relay box connector A (4P).

12. Check for continuity between the windshield wiper motor 5P connector terminal No. 4 and the under-hood fuse/relay box connector A (4P) terminal No. 2.

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 open in the wire.






13. Check the No. 11 (30 A) and No. 31 (15 A) fuses in the under-dash fuse/relay box.

Are the fuses OK?
YES - Go to step 12.

NO - Replace the fuse(s) and recheck the system.


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

15. Check the No. 11 (30 A) and No. 31 (15 A) fuses in the under-dash fuse/relay box.

Are the fuses OK?
YES - Go to step 16.

NO - Replace the fuse and recheck the system.


16. Do the wiper motor test. Wiper Motor Test

Does the wiper motor run normally?
YES - Go to step 17.

NO - Replace the windshield wiper motor and recheck.


17. Disconnect the windshield wiper motor 5P connector.

18. Disconnect under-hood fuse/relay box connector A (4P).

19. Check for continuity between the windshield wiper motor 5P connector terminals No. 3 and No. 5 and the under-hood fuse/relay box connector A (4P) terminals No. 3 and No. 4.

Is there continuity?
YES - Go to step 20.

NO - Repair open in the wire.






20. Check for continuity between the windshield wiper motor 5P connector terminal No. 2 and body ground.

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 open in the wire or poor ground (G401).