1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Turn the windshield wiper switch ON for 5 seconds and OFF.
4. Check for DTCs with the HDS.
Is DTC B1076 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
5. Select BODY ELECTRICAL SYSTEM SELECT menu, then enter the DATA LIST menu.
6. Check the ON/OFF information of the Windshield wiper switch (BACK-UP) with the HDS.
Is OFF indicated?
YES -
Go to step 7.
NO -
Check for a short in the wire between the combination switch control unit and the relay control module (BACK-UP WIPER line), if the harness is
OK, replace the combination switch control unit See: Sensors and Switches/Sensors and Switches - Wiper and Washer Systems/Wiper
Switch/Service and Repair.?
7. Turn the windshield wiper switch ON.
8. Check the ON/OFF information of the Windshield wiper switch (BACK-UP) with the HDS.
Is ON indicated?
YES -
Go to the relay control module input test See: Power and Ground Distribution/Testing and Inspection/Relay Control Module Input Test and check
for a poor ground, if the GND line is OK, replace the under-hood fuse/relay box See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service
and Repair/Under-Hood Fuse/Relay Box Removal and Installation.?
NO -
Check for an open in the wire between the combination switch control unit and the relay control module (BACK-UP WIPER line), if the wire is
OK, replace the combination switch control unit See: Sensors and Switches/Sensors and Switches - Wiper and Washer Systems/Wiper
Switch/Service and Repair.?
B1077
DTC Troubleshooting: B1077
DTC B1077:
Windshield Wiper Motor (Park) Signal Error
1. Turn the ignition switch to ON (II), and the windshield wiper switch ON.
2. Check the windshield wiper operation.
