Wiper System

The wiper system provides the driver with the normal wiper (low and high speeds), intermittent wipe, wipe after wash and pulse wipe functions. The driver selects the wiper function via the resistive multiplexed stalk switch mounted on the steering column. The Body Control Module (BCM) uses input signal from the stalk switch, wiper motor park switch and the washer switch to control the wipe system. The BCM then controls the relays and timing functions to provide the driver selected features.

SYSTEM FEATURES

Speed Sensitive Intermittent Wipe Mode
There are 6 individual delay times with a minimum delay of 1/2 second to a maximum of 18 seconds. When the vehicle speed is under 10 MPH, the delay time is doubled providing a range of 1 second to 36 seconds.

Pulse Wipe
The wiper is in the off position and the driver presses the wash button for more than 62 milliseconds, but less than 1/2 second, 2 wipe cycle in low speed mode will be provided.

Park after Ignition Off
Because the wiper relays are powered from the battery the BCM can run the wipers to park after the ignition is turned off.

Wipe after Wash
When the driver presses the wash button for over 1/2 second and then releases it, the wiper will continue to run for 2 additional wipe cycles.

The wiper system utilizes the BCM to control the on/off and hi/low relays for low and hi speed wiper functions, intermittent wiper delay as the switch position changes, pulse wipe, wipe after wash mode, and wiper motor park functions. The BCM uses the vehicle speed input to double the usual delay time below 10 MPH There are three diagnostic trouble codes associated with the wiper system. Two codes are set based on the condition of the on/oft relay control wire open, shorted to ground or shorted to battery. The third code will set if the wiper motor park switch fails to open and close.