B1077

DTC Troubleshooting: B1077

DTC B1077: Wiper Auto-stop (AS) Signal Circuit 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 the wiper switch ON.

3. Turn the wiper switch to LOW or HIGH for at least 15 seconds, then turn the switch OFF.
NOTE: If the wiper motor does not run, go to step 7.

Does the wiper arms stop at the AUTO STOP (park) position?
YES - Go to step 4.

NO - Go to step 5.


4. Check for DTCs with the HDS.

Is DTC B1077 indicated?
YES - Check for loose or poor connections at the driver's MICU and the wiper motor. If the connections are OK, substitute a known-good driver's MICU (driver's under-dash fuse/relay box), and recheck. If the DTC does not reappear, replace the driver's under-dash fuse/relay box. Drivers Under-Dash Fuse/Relay Box (MICU) Removal/Installation

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. Check the No. 3 (WIP MTR) (30 A) fuse in the under-hood fuse/relay box.

Is the fuse OK?
YES - Go to step 7.

NO - Replace the fuse, and recheck the system.


7. Do the wiper motor test. Washer Motor Test

Is the wiper motor OK?
YES - Go to step 8.

NO - Replace the wiper motor and recheck.


8. Reconnect the wiper motor 5P connector.

9. Measure the voltage between body ground and the wiper motor 5P connector terminal No. 3 with the wiper switch ON (Low), and measure the voltage between body ground and the wiper motor 5P connector terminal No. 5 with the wiper switch ON (High) respectively.

Is there battery voltage?
YES - Go to step 10.

NO - Test the wiper relay circuit. Testing and Inspection If the relay circuit is OK, check the terminals F7 and F8 of driver's under-dash fuse/relay box connector F (33P) by the input test. Wipers/Washers MICU Input Test If the input tests prove OK, replace the driver's under-dash fuse/relay box. Drivers Under-Dash Fuse/Relay Box (MICU) Removal/Installation If the relay circuit is faulty, replace the left engine compartment wire harness.






10. Measure the voltage between body ground and the wiper motor 5P connector terminal No. 2 [No. 4].
[ ]: 2-door

Is there less than 0.5 V?
YES - Repair an open or high resistance in the BLU (low) or YEL (high) wire.

NO - Repair an open in the BLK wire or poor ground (G301).