Diagnostic Aids

The scan tool Parking Assist Disabled History 1 - 8 data can be used to diagnose a malfunction within the parking assist system or an intermittent concern. The following is a brief description of potential causes which may aid in diagnosis. For each potential issue, perform an appropriate inspect of the component or system and refer to the specific service information subsection related to that system for further diagnosis:

Manual Disable - The parking assist system has been disabled through the parking assist switch or vehicle personalization menu.
Rear Wheel Steering Malfunction - A malfunction condition exists within the rear wheel steering system that is inhibiting operation of the parking assist system.
Trailer or Other Attached Object - The parking assist control module is detecting an object that is attached to the vehicle. Common items such as a hitch receiver, trailer, or a bicycle rack may cause this concern. Additionally, damage to the rear of the vehicle or a misaligned sensor may cause this concern. If the vehicle is damaged in a manner that causes the sensor to detect the bumper itself, the parking assist control module will interpret this as an attached object and disable the system. Carefully inspect the bumper, bumper mounting surface, and sensor retainers before continuing with normal diagnosis. After the detected cause has been addressed the vehicle must be driven at speed greater than 40 km/h (25 MPH).
Excessive Speed in Reverse - The vehicle is travelling too fast in reverse at speeds of greater than 8 km/h (5 MPH).
Electronic Brake Control Module Malfunction - A malfunction condition exists within the brake system that is inhibiting operation of the parking assist system.
Sensor Disturbance - An outside interference is causing sensor movement. Such interference may be caused a heavy pounding, like that of a nearby jackhammer, or large changes in pressure, such as a large truck air brakes.
Rear Wheel Steering Angle Signal Invalid - A malfunction condition exists within the rear wheel steering system that is inhibiting operation of the parking assist system.
Invalid Data Received From Electronic Brake Control Module - Invalid information has been received the brake system, inhibiting operation of the parking assist system.
Side Object Detection Signal Invalid - Invalid information has been received the side object detection system, inhibiting operation of the parking assist system.
Disabled by Driver Personalization - The parking assist system has been disabled through the vehicle personalization menu.
Invalid Data Received From Seat Memory Control Module - Invalid information has been received from the seat system, inhibiting operation of the parking assist system.
Disabled by Active Safety Control Module - The active safety system has requested the parking assist system be disabled.
Invalid Data Received From Instrument Cluster - - Invalid information has been received from the instrument cluster, inhibiting operation of the parking assist system.
Vehicle Direction Not Plausible - A malfunction exists where the indicated vehicle direction, as determined by the brake system and/or active safety system, is not plausible.
Not Plausible - If the sensor fails its own diagnostic initialization the parking assist control module will set this error. After the detected cause has been addressed the vehicle must be driven at speed greater than 40 km/h (25 MPH). The following is a list of reasons this cause may have set:
- One or more of the sensors may be blocked by snow, mud, ice, or other debris. This might happen after going through a car wash in cold weather.
- Silicone insulator surrounding sensor maybe missing, cut, or twisted.
- Improperly installed sensor, sensor maybe be crooked due to a tight wire harness.
- One or more of the sensors may be scratched or the paint maybe chipped.
- Excessive paint thickness on a sensor may cause an excessive sensor ring time. When replacing or refinishing a sensor, do not apply an excessive amount of paint or clear coat.