Testing

Windshield Wipers And Washers
The windshield wiper system operates in several modes:
- Low and high speed normal wipe
- Speed sensitive intermittent wipe
- Wipe after wash
- Pulse wipe
- Park (switch OFF)

The windshield wiper circuits are continuously monitored and controlled by the Body Control Module (BCM). If a problem occurs in the electronic components, wiring, switch (except integral motor park switch) and wiper motor a Diagnostic Trouble Code (DTC) will be stored in the BCM memory. DTC's can be retrieved using a scan tool (DRB).

The windshield wiper park switch and circuit is monitored by the BCM. The park switch and circuit can be tested using the Wiper System Diagnosis chart.

Failed Park Switch
If the wiper park switch has failed the windshield wipers will operate as follows:
SWITCH OFF - Wipers stop in current location regardless of the park signal.
INTERMITTENT MODE - Wipers operate at low speed for one or more extra wipes or continuously.
LOW SPEED - Wipers operate at low speed.
HIGH SPEED - Wipers operate at high speed.
PULSE WIPE - Wipers will not operate.
WIPE AFTER WASH - Wipers operate at low speed in any mode setting. Wipers operate only while wash button is depressed with switch in OFF mode, wipers stop in mid-cycle when button is released.

The windshield wiper park switch and circuit is monitored by the BCM. The park switch and circuit can be tested using the Wiper System Diagnosis table.

Rear Wipers And Washers
The rear window wiper system operates in several modes:
- Continuous wipe
- Intermittent wipe
- Wash
- Wipe after wash

The windshield wiper circuits are continuously monitored and controlled by the Body Control Module (BCM). If a problem occurs in the electronic components, wiring, switch (except integral motor park switch) and wiper motor a Diagnostic Trouble Code (DTC) will be stored in the BCM memory. The DTC(s) can be retrieved using a scan tool (DRB).