Wipers And Washers - Rear

REAR

WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, occupant classification system, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment, possible personal injury, or death.

If the rear wiper motor operates, but the wiper motor output shaft does not move, replace the ineffective rear wiper motor. If the washer pump/motor operates, but no washer fluid is dispensed on the glass; or, if the wiper operates, but chatters, lifts or does not clear the glass, clean and inspect the rear wiper and washer system components as required. Wipers And Washers - Cleaning and . Wipers And Washers - Inspection

The hard wired rear wiper and washer system circuits and components may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the rear wiper and washer system or the electronic controls or communication between other modules and devices that provide some features of the rear wiper and washer system. The most reliable, efficient, and accurate means to diagnose the rear wiper and washer system or the electronic controls and communication related to rear wiper and washer system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

NOTE: The rear wiper and washer switches are integral to the multi-function switch. The multi-function switch communicates with the Steering Control Module (SCM), which is also integral and internal to the multi-function switch. The SCM communicates with the Steering Angle Sensor (SAS) which is integral to the clockspring over the Local Interface Network (LIN) data bus. The SAS communicates with the Body Control Module (BCM) (also known as the Common Body Controller/CBC) over the Controller Area Network (CAN) data bus. Before performing any of the following tests, determine whether the other functions of the multi-function switch are operational. If other functions of the multi-function switch are ineffective, diagnose and repair that problem before attempting to repair the Rear Wiper and Washer System.