Wipers And Washers
Refer to Wiring Diagrams Cell 59, Generic Electronic Module for schematic and connector information.
Refer to Wiring Diagrams Cell 81, Interval Wiper/Washer for schematic and connector information.
Refer to Wiring Diagrams Cell 82, Liftgate Wiper/Washer for schematic and connector information.
Principles of Operation
NOTE: The generic electronic module (GEM) will not activate the rear wiper system if either the liftgate or the liftgate glass is ajar. If either the liftgate or the liftgate
glass becomes ajar while the rear wiper is in operation, the GEM will park the rear wiper motor.
There are two distinct modes of wiper operation:
Off Mode: In this mode, there is no rear wiper activity, and the wiper motor will be in the PARK position.
Interval Mode: This mode is selected when the rear wiper switch is in either the Interval 1 or 2 position. When this mode is selected, the rear wiper motor is
driven up onto the glass by activating the rear wiper UP relay. When the wiper motor HIGH/LOW/PARK position input reaches the high position, the UP relay is
deactivated and the DOWN relay is activated to reverse the wiper motor direction. When the wiper motor reaches the LOW position, as determined by the
HIGH/LOW/PARK position input, the GEM deactivates the DOWN relay and will begin a new wiper cycle 1 to 10 seconds later, depending on the interval
position selected.
To engage the rear window washer, rotate the rear window washer selector downward to the WASH position. The rear window wiper will run as long as the WASH
position is selected. When the rear window washer selector returns to the OFF, INT 1 or INT 2 position, the washer will stop immediately, but the rear window wiper will
continue for two to three sweeps and then return to its previous mode of operation.
The low washer fluid indicator chime warns that the washer fluid level is low. The low washer fluid indicator chime is a single tone with a duration of one second. The
chime will sound when the low washer fluid indicator is initially activated.
The low washer fluid indicator warns that the fluid level in the washer reservoir is low. The low washer fluid indicator will illuminate when the washer fluid level is low
and the ignition switch is in the RUN position.
The low washer fluid indicator will deactivate when the washer fluid reservoir is filled and the ignition switch has been cycled from RUN to OFF, then to RUN.
Inspection and Verification
1. The wiper/washer system is a generic electronic module (GEM) controlled system; refer to Section 419-10.
2. Verify the customer concern by operating the wiper/washer system.
3. Visually inspect for obvious signs of mechanical and electrical damage.
Visual Inspection Chart
4. If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to
be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
Check that the program card is properly installed.
Check the connections to the vehicle.
Check the ignition switch position.
5. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
6. Perform the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with:
CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00.
NO RESPONSE/NOT EQUIPPED for generic electronic module (GEM), go to Pinpoint Test M.
SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and perform self-test diagnostics for
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