Operation

OPERATION

WINDSHIELD WIPER SYSTEM

The Windshield Wiper System will operate when the ignition switch is in the ACC or ON/RUN position and the multifunction switch lever is rotated to the intermittent, low, or high positions. The Wiper System completes the wipe cycle and parks the wiper blades in the lowest portion of the wipe pattern when the multifunction switch lever is rotated to the OFF position. Fuses, located in the Underhood Accessory Fuse Block protect the circuitry of the Wiper System and the vehicle. The wiper motor has permanent magnet fields. The speeds are determined by current flow to the appropriate set of brushes.

The Wiper System in addition to low and high speed has a constant intermittent delay mode. The amount of delay is controlled by the Body Control Module (BCM) and is not adjustable.

The mist function is available by pressing the end of the multifunction switch lever inward toward the steering column to the point of resistance. If the multifunction switch lever is held in, the wipers will continue to operate. If it is pressed inward momentarily then released, the Wiper System will only cycle once. A mist and wash function is also available if the multifunction switch lever is pressed inward past the point of resistance momentarily. This will operate the washers and cycle the Wiper System twice, then return the wipers to the park position.

The most reliable, efficient, and accurate means to diagnose the BCM inputs and outputs related to the various Wiper System operating modes requires the use of a DRB III(R) scan tool.

WASHER SYSTEM

The Washer System is activated by pressing inward on the multifunction switch lever whenever the ignition switch is turned to the ACC or the ON/RUN position. The multifunction switch lever must be pressed past the point of resistance for at least ±0.5 seconds to get the washer system to cycle. Holding the multifunction switch lever switch depressed will operate the wipers and washers continuously. Releasing the switch will stop the washer pump motor, but the Wiper System will complete the current wipe cycle, followed by several more wipe cycles (1) before the wipers park. If the wash switch is pressed momentarily with the wipers in the OFF or INTERMITTENT position, a pulse wipe cycle consisting of two wipes will occur.

Fluid is gravity fed from the washer reservoir to the washer pump motor. The washer fluid is forced by the washer pump motor through rubber hoses to the cowl grille mounted nozzles which distribute the fluid streams on the surface of the windshield. The washer pump motor, washer nozzles, and washer reservoir are serviced separately.