Procedures
Parking Assist Warning Device: Testing and Inspection
⚠ WARNING
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, Occupant Classification System (OCS), seat belt tensioner, impact sensor or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to follow these instructions may result in accidental airbag deployment.- SERVICE PARK ASSIST - If a service park assist textual message appears in the EVIC display, be certain to confirm the following: -The parking brake is not applied. -The rear bumper is free of ice, snow, mud or other obstructions that will prevent the system from operating properly. The park assist system is self correcting, please verify that the area of the rear bumper where the sensors are located is not blocked by ice, snow, mud or other obstructions. If the area is blocked, remove the blockage, shift the transmission selector lever into reverse and verify the message is no longer present in the EVIC display. The system may also be corrected when the vehicle is driven at a speed greater than 14 kph (8 mph). NOTE: The presence of jackhammers, large trucks, and other vibrations in the vicinity of the vehicle could impact the performance of the system.
- PARK ASSIST OFF - If a park assist off textual message appears in the EVIC display, the system may either be manually cut-off or have a hard fault. If the manual cut-off switch is not illuminated further investigation may be needed. The hard wired circuits between components related to the park assist system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the park assist system or the electronic controls or communication between modules and other devices that provide some features of the park assist system. The most reliable, efficient, and accurate means to diagnose the park assist system or the electronic controls and communication related to park assist system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.
Park Assist System Chime/Buzzer - Description
PARK ASSIST SYSTEM A park assist system is an optional factory-installed electronic parking aid. During parking and other similar vehicle maneuvers this system alerts the vehicle operator to 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 object is detected, the system displays a textual message within the Electronic Vehicle Information Center (EVIC) display unit to provide the vehicle operator with visual and audible indications of the presence and proximity of such objects. The park assist system includes the following major components, which are described in further detail elsewhere in this service information: -Electronic Vehicle Information Center (1) - In vehicles equipped with the optional park assist system, the optional EVIC in the instrument cluster displays textual warnings and error messages, and emits audible warnings related to the current operating status of the park assist system. The display also provides an interface that allows the vehicle operator to manually disable or enable the system using the park assist switch located in the instrument panel switch pod. -Park Assist Switch (2) - The optional park assist system can be manually disabled or enabled using either a park assist switch that is integral to the instrument panel switch pod in the instrument panel center stack below the heater and air conditioner controls, or using the settings function found in the menu for the Electronic Vehicle Information Center (EVIC) of vehicles without a park assist switch in the instrument panel switch pod. -Park Assist Module (3) - Vehicles equipped with the park assist system include a park assist module which is secured through integral mounting tabs by push-in type fasteners to the quarter inner panel above and behind the right rear wheel house where it is concealed beneath the quarter inner trim panel. -Park Assist Sensors (4) - Vehicles equipped with the park assist system have four ultrasonic park assist sensors that are concealed behind the rear bumper fascia. Each sensor is snapped into an individual molded plastic mounting bracket located at horizontal intervals along the back side of the rear bumper fascia. Hard wired circuitry connects the various park assist system components to each other through 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 and to the vehicle electrical system 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. The park assist system components cannot be adjusted or repaired. If any of the park assist system components is damaged or ineffective, that component must be replaced.