Wiper System & Washer System (Service Information): Description: Rear

An electrically operated fixed interval intermittent rear wiper and washer system is standard factory-installed equipment on this vehicle. The rear wiper and washer system includes the following major components, which are described in further detail elsewhere in this service information:

• Rear Washer Nozzle  - The fluidic rear washer nozzle with an integral check valve is secured by integral latch features to a mounting hole on the lower surface of the rear spoiler located near the top of the liftgate glass.
• Rear Washer Plumbing  - The plumbing for the rear washer system consists of rubber hoses and molded plastic fittings. The plumbing is routed along the left side of the engine compartment from the washer reservoir on the Front End Module (FEM) carrier and through the dash panel into the passenger compartment. It is then routed within the body wiring harness along the left side of the floor to the left rear inner wheel housing, then up the wheel housing to the D-pillar. It exits the wire harness near the top of the D-pillar and connects to the liftgate washer hose, which is routed along the liftgate opening upper reinforcement to the center of the vehicle then through the upper liftgate opening to the rear washer nozzle on the liftgate spoiler.
• Rear Wiper Arm And Blade  - The single rear wiper arm is secured by a nut directly to the rear wiper motor output shaft, which extends through a rubber grommet inserted into a hole in the liftgate glass near the base of the glass. The rear wiper blade is secured to the rear wiper arm with an integral latch feature, and is parked near the base of the glass when the rear wiper system is not in operation.
• Rear Wiper Motor  - The rear wiper motor includes the motor bracket and three rubber-isolated wiper motor mounts. The wiper motor output shaft is the only visible component of the rear wiper motor. The remainder of the motor is concealed by the lower liftgate inside trim panel below the inside of the liftgate glass.
• Rear Wiper Relay  - The rear wiper relay is soldered onto the Printed Circuit Board (PCB) located within the Power Distribution Center (PDC) and is not serviceable. The PDC is located within the engine compartment.
• Washer Pump/Motor  - The reversible electric washer pump/motor unit is located in a dedicated hole in a sump area on the lower, outboard side of the washer reservoir, ahead of the left front wheel house splash shield. This single reversible washer pump/motor provides washer fluid to either the front or rear washer system plumbing, depending upon the direction of the pump motor rotation.
• Washer Reservoir  - The rear washer system shares a single reservoir and reversible pump with the front washer system, but has its own dedicated plumbing. The washer reservoir is concealed between the left inner fender shield and the left outer fender panel, ahead of the left front wheel house splash shield. The filler neck and cap are the only visible components of the reservoir and, are accessed from the left front corner of the engine compartment.

Certain functions and features of the rear wiper and washer systems rely upon resources shared with other electronic modules in the vehicle over the Controller Area Network (CAN) data bus. Other electronic modules in the vehicle that may affect rear wiper and washer system operation are:

• Body Control Module  - The Body Control Module (BCM) (also known as the Common Body Controller/CBC) is located on the lower right cowl side inner (kick) panel within the passenger compartment, where it is concealed behind the cowl side inner trim. Refer to MODULE, BODY CONTROL, DESCRIPTION .
• Multifunction Switch  - The multifunction switch is integral to the Steering Column Control Module (SCCM) along with the clockspring and the Steering Control Module (SCM) on the top of the steering column just below the steering wheel. The multifunction switch is connected to the SCM. Only the switch control stalk extending from the left side of the steering column is visible, while the remainder of the switch is concealed beneath the steering column shrouds. The multifunction switch provides all of the driver controls for both the front and rear wiper and washer systems.
• Steering Control Module  - The Steering Control Module (SCM) is integral to the Steering Column Control Module (SCCM) along with the multifunction switch and the clockspring on the top of the steering column just below the steering wheel. The SCM is completely concealed beneath the steering column shrouds. Refer to MODULE, STEERING COLUMN, DESCRIPTION .

The BCM and the SCM each contain a micro-controller and programming that allow them to communicate with each other and other electronic modules in the vehicle using the Controller Area Network (CAN) data bus. Refer to COMMUNICATION, DESCRIPTION .

Hard wired circuitry connects the rear wiper and washer system components to the electrical system of the vehicle. These hard wired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other, to the vehicle electrical system and to the rear wiper and washer system components through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin out and location views for the various wire harness connectors, splices and grounds.