Component Description

Wiper/Washer Switch 

The wiper/washer switch is mounted directly to the SASM. The windshield wiper/washer inputs to the SASM are:

• Mist wipe
• Windshield wash
• Off
• AUTO 1/INT 1
• AUTO 2/INT 2
• AUTO 3/INT 3
• AUTO 4/INT 4
• AUTO 5/INT 5
• AUTO 6/INT 6
• Low
• High

The rear wiper/washer inputs to the SASM are:

• Off
• INT 1
• INT 2 (continuous wipe)
• Rear window wash

Front Wiper Motor 

The windshield wiper motors contains a logic module, internal sensors (to monitor the wiper arm position) and a multi-speed motor. The logic module from the driver side windshield wiper motor continuously monitors the wiper/washer switch inputs from the BCM and (if equipped) the rain sensor when the ignition is ON. Depending on the input, the wiper motor activates to achieve the desired request.

The driver side windshield wiper motor is the primary wiper motor and controls the operation of both windshield wipers.

There is no mechanical linkage between the motor and the wiper arm, the wiper arms are mounted directly to the wiper motors.

Washer Pump 

The washer pump is controlled by the BCM. The front and rear washer system share the same washer reservoir and a bi-directional washer pump. The washer pump delivers washer fluid to the windshield when the BCM activates the windshield washer relay (internal to the BCM), which provides voltage to the washer pump. Ground for the washer pump is provided through the rear washer relay (also internal to the BCM). When activated, the washer pump delivers washer fluid to the windshield.

When the BCM energizes the rear washer relay, the rear washer relay provides voltage to the washer pump. Ground for the washer pump is provided through the windshield washer relay (internal to the BCM). When activated, the pump delivers washer fluid to the rear window(s).

Heated Windshield Washer Jet 

The windshield washer jet contains a heating element (similar to a rear window defroster) to warm the washer fluid within it to a temperature above freezing. Battery voltage is supplied to the windshield washer jets when the ignition is on. The purpose of the heated washer jets is to prevent washer fluid from freezing within the washer nozzles.

Rain Sensor 

The rain sensor uses an infrared beam to optically sense water on the windshield. The intensity of the reflected beam is measured and compared to the intensity of the transmitted beam. If there is water on the surface of the windshield, the beam distorts, reducing the intensity of the beam. If the beam is not reflected completely, it is interpreted as rain on the windshield and the windshield wipers are activated.

A gel-type lens is used as the interface between the rain sensor and the windshield. If the lens is missing or damaged, the rain sensing wipers can be inoperative. The rain sensor gel-type lens can be replaced separately on a rain sensor of this type.

Rear Wiper Motor 

The rear window wiper motor contains a single speed motor. When the BCM momentarily energizes the rear window wiper motor relay, the rear window wiper activates. A separate power circuit is used to continue the rear window wipe and park the rear window wiper.

SASM 

The SASM monitors the wiper/washer switch input and sends the wiper/washer switch requests to the BCM over the LIN.

The SASM does not require PMI when replaced.

BCM 

The BCM controls the operation of the wipers/washers based on the input received from the SASM.

The BCM requires PMI, at least 2 keys programmed and the parameter reset procedures performed when replaced.