Wiper and Washer Systems: Testing and Inspection
The complexity of the electronics involved with the Body Processor and the two multiplexed communication networks which are associated with it, preclude the use of workshop general electrical test equipment. Therefore, reference should be made to the Portable Diagnostic Unit (PDU) User Guide for detailed instructions on testing the Wipers and Washers.The PDU systematically tests and analyses all electrical functions of the Wipers and Washers.
Where a fault is indicated, some basic diagnostic methods may be necessary to confirm that connections are good and that wiring is not damaged, before replacing a component.