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.
The presence of jackhammers, large trucks, and other vibrations in the vicinity of the vehicle could impact the performance of the system.
The following textual messages May appear in the Electronic Vehicle Information Center (EVIC):
- SERVICE PARK ASSIST - If a service park assist textual message appears in the EVIC display, the system may or have a hard fault, and further investigation may be needed.
- CLEAN PARK ASSIST SENSORS
- If a clean park assist sensors textual message appears in the EVIC display, be certain to confirm the following:
- 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 gear selector into Reverse R 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).
- The rear bumper is free of ice, snow, mud or other obstructions that will prevent the system from operating properly.
- SERVICE PARK ASSIST SENSORS - If a service park assist sensors textual message appears in the EVIC display, a sensor or the sensor wiring may be damaged, and further investigation may be needed.
- PARK ASSIST OFF - If a PARK ASSIST OFF textual message appears in the EVIC display, the system may have been manually shut Off.
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.