Diagnosis And Testing - Park Assist System
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.
If a SERVICE PARK ASSIST SYSTEM graphic and textual message appears in the Electronic Vehicle Information Center (EVIC) display of the Instrument Cluster (IC) (also known as the Instrument Panel Cluster/IPC), be certain to confirm the following:
- Be certain that both the face and the back of the rear bumper fascia (with Rear Park Assist/RPA) is, or the front and rear bumper fascias (with Front and Rear Park Assist/FRPA or with Parallel and Perpendicular Park Assist/PPPA) are free of dirt and debris to keep the system operating properly.
- The presence of operating heavy construction equipment, large trucks and other sources of vibration in the vicinity of the vehicle could also 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 and 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 DIAGNOSTIC CODE INDEX, PAM .