Rear Park Assist (RPA)

A RPA system is an optional factory-installed electronic parking aid. During parking and other similar vehicle maneuvers this system alerts the vehicle operator to the approximate relative distance of obstacles located in the path immediately behind the vehicle which, due to the surrounding rear vehicle structure, might be otherwise difficult to perceive. When an obstacle is detected, the system uses graphics and chimes to provide the vehicle operator with visual and audible indications of the presence and Proximity of such objects.

The RPA system includes the following major components, which are described in further detail elsewhere in this service information:

• Body Control Module (BCM)  - The BCM serves as the gateway between the Local Interface Network (LIN) data bus of the park assist OFF switch and the Controller Area Network (CAN) data bus network used to communicate between the Park Assist Module (PAM), the Instrument Panel Cluster (IPC) and the Radio Receiver Module (RRM).
• Instrument Panel Cluster (IPC)  - In vehicles equipped with the optional RPA system, the Electronic Vehicle Information Center (EVIC) within the IPC displays vehicle graphics that illustrate the approximate location and relative distance of obstacles within the rear path of the vehicle. The EVIC also displays textual warnings and error messages along with issuing audible alerts related to the current operating status of the RPA system.
• Park Assist Module (PAM)  - Vehicles equipped with the RPA system include a 4 channel PAM, which is secured through integral mounting tabs to the left quarter inner panel above the left rear wheel house, where it is concealed beneath the quarter inside trim within the cargo area of the vehicle.
• Park Assist OFF Switch  - The park assist system can be manually disabled or enabled using a park assist OFF switch. The park assist OFF switch is integral to the instrument panel switch pod in the instrument panel center stack below the RRM. This switch allows the operator to turn the park assist system OFF.
• Park Assist Sensors  - Vehicles equipped with the RPA system have four ultrasonic park assist sensors that are concealed behind the rear bumper fascia. Only the sensor membrane is visible on the outer surface of the rear bumper fascia. Each sensor is snapped into an individual molded plastic mounting bracket located at horizontal intervals along the inside surface of the rear bumper fascia.
• Radio Receiver Module (RRM)  - In vehicles equipped with the RPA system, the PAM sends electronic message requests to the RRM to mute audio system output during chime tone generation. In addition, the RRM provides an interface that allows the vehicle operator to manually disable or enable the RPA system using the Setup Menu function.