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, 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 take the proper precautions could result in accidental airbag deployment.
On vehicles equipped with the high voltage system, disconnecting the 12-volt battery negative cable alone will not power down the 12-volt system. You must perform the 12-volt Power Down procedure before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
The Generic Failure Indicator (GFI) icon may appear in the Instrument Cluster (IC) (also known as the Instrument Panel Cluster/IPC) display. If a GFI icon appears in the IC display, and the condition is related to the park assist system; be certain to confirm the following:
- Be certain that the rear bumper is free of dirt and debris to keep the system operating properly. The park assist system is self correcting, please verify that the area of the rear bumper where the sensors are located (both the face and the back) 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 GFI icon is no longer present in the IC display.
- Be certain that the parking brake is not applied.
- The presence of operating heavy construction equipment, 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 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 the appropriate diagnostic information.