How the Circuit Works: Notes

The wiper/washer system is part of the multiplex integrated control system. The Driver's MICU, Passenger's MICU, and the Windshield Wiper/Washer Switch are the main operation controls of the wiper/washer system. The Wiper Motor Relay, Wiper Intermittent Relay, and Wiper High/Low Relay are incorporated in the Under-hood Fuse/Relay Box.

Testing of the multiplex components and reading Diagnostic Trouble Codes (DTCs) can be done by using an HDS Tester. The Windshield Wiper Motor and Windshield Washer Motor also can be tested manually without an HDS Tester.

Refer to the WIPER SYSTEM / WASHER SYSTEM for specific tests and troubleshooting procedures.