B1077

DTC Troubleshooting: B1077

DTC B1077: Windshield Wiper (As) 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 wiper switch to LOW or HIGH for at least 15 seconds, then turn the switch OFF.

Does the windshield wiper motor run normally?
YES - Go to step 4.

NO - Go to step 12.


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 wiper motor test. Wiper Motor Test

Does the wiper motor run normally?
YES - Go to step 7.

NO - Replace the windshield wiper motor, 4-door, Service and Repair 2-door, and recheck.


7. Disconnect under-dash fuse/relay box connector F (34P) and windshield wiper motor 5P connector.

8. Check for continuity between windshield wiper motor 5P connector terminal No. 5 and under-dash fuse/relay box connector F (34P) terminal No. 32.

Is there continuity?
YES - Go to step 9.

NO - Repair an open or high resistance in the WHT wire.






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

Is there continuity?
YES - Repair a short in the WHT wire.

NO - Go to step 10.






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

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

Is there voltage?
YES - Repair a short to power in the WHT wire.

NO - Faulty MICU; replace the under-dash fuse/relay box. Under-dash Fuse/Relay Box Removal/Installation






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

13. Check the No. 38 (30 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?
YES - Go to step 14.

NO - Replace the fuse and recheck the system.


14. Do the wiper motor test. Wiper/Washer Switch Test

Does the wiper motor run normally?
YES - Go to step 15.

NO - Replace the windshield wiper motor and recheck.


15. Reconnect the windshield wiper motor, 4-door, Service and Repair 2-door, 5P connector.

16. Measure the voltage between under-dash fuse/relay box connector F (34P) terminals No. 18 (LO) and No. 19 (HI) and body ground with the wiper switch in the corresponding position individually.

Is there battery voltage?
YES - Go to step 17.

NO - Faulty MICU; replace the under-dash fuse/relay box. Under-dash Fuse/Relay Box Removal/Installation






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

Is there less than 0.2 V?
YES - Repair an open or high resistance in the BLU (LO) or YEL (HI) wire.

NO - Repair an open or high resistance in the BLK wire or poor ground (G201).