Collision Avoidance and Parking Assist Systems: Testing and Inspection

PARK ASSIST SYSTEM

WARNING: To avoid serious or fatal injury on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag, 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 supplemental restraint system. Failure to take the proper precautions could result in accidental airbag deployment.

If a SERVICE PARK ASSIST SYSTEM textual message appears in the Electronic Vehicle Information Center (EVIC) display, be certain to confirm the following:

- Be certain that the rear bumper is free of dirt and debris to keep the system operating properly.
- Be certain that the parking brake is not applied.
- The presence of jackhammers, large trucks, and other vibrations in the vicinity of the vehicle could impact the performance of the system.

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.