B1077
DTC B1077: Windshield Wiper (As) Signal ErrorNOTE: 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 to LOCK (0), and then back ON (II).
3. Turn the wiper switch to LOW or HIGH for at least 15 seconds, then turn the switch OFF.
Do the wiper arms stop at the AUTO STOP (park) position?
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 the time. Check for loose or poor connections.
5. Turn the ignition switch to LOCK (0).
6. Do the windshield wiper motor test.
Does the wiper motor run normally?
YES - Go to step 7.
NO - Replace the windshield wiper motor and recheck.
7. Disconnect under-dash fuse/relay box connector F (34P) and the windshield wiper motor 5P connector.
8. Check for continuity between the windshield wiper motor 5P connector No. 4 terminal and under-dash fuse/relay box connector F (34P) No. 32 terminal.
Is there continuity?
YES - Go to step 9.
NO - Repair an open in the WHT wire.
9. Check for continuity between the windshield wiper motor 5P connector No. 4 terminal and body ground.
Is there continuity?
YES - Repair a short in the WHT wire.
NO - Go to step
10. Turn the ignition switch ON (II).
11. Measure the voltage between the windshield wiper motor 5P connector No. 4 terminal 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.
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 windshield wiper motor test.
15. Reconnect the windshield wiper motor 5P connector.
16. Run the windshield wiper motor at LOW or HIGH, and measure the voltage between body ground and under-dash fuse/relay box connector F (34P) No. 18 terminal (Low) and No. 19 terminal (High) respectively.
Is there battery voltage?
YES - Go to step 17.
NO - Faulty MICU; replace the under-dash fuse/relay box.
17. Measure the voltage between the windshield wiper motor 5P connector No. 2 terminal and body ground.
Is there less than 0.5 V?
YES - Repair an open or high resistance in the BLU (LO) or YEL (HI) wire.
NO - Repair an open in the BLK wire or poor ground (G302).