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.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back 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 windshield wiper system is OK at this time. Check pinfits and connections.

5. Turn the ignition switch OFF.
6. Perform the 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 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 the under-hood fuse/relay box connector J (5P) and windshield wiper motor 5P connector.




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

Is there continuity?

YES - Go to step 11.

NO - Repair an open in the WHT wire.




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

Is there continuity?

YES - Repair a short in the WHT wire.

NO - Faulty relay control module; replace the under-hood fuse/relay box.

12. Turn the ignition switch OFF, and check the No 11 (30A) fuse in the under-dash fuse/relay box

Is the fuse OK - ?

YES - Go to step 13.

NO - Replace the blown fuse and recheck the system If the fuse blown again, check for a short on the GRN wire between the under dash fuse/relay box and the windshield wiper motor.

13. Turn the ignition switch ON (II)




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

Is there battery voltage?

YES - Go to step 15.

NO - Repair an open in the GRN wire.




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

Is there continuity?

YES - Faulty relay control module, replace the under-hood fuse/relay box

NO - Repair an open in the BLU or YEL wire.