The parking assist system can be disabled by pressing the parking assist disable switch. When pressed, the parking assist disable signal circuit is pulled to ground. When parking assist is disabled, the object alarm module also ground the parking assist disable indicator control circuit, illuminating the indicator.

The object alarm module has detected that the parking assist disable switch signal circuit is shorted to ground.

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, observe the scan tool Park Assist Switch parameter while cycling the parking assist disable switch. The should change between Active and Inactive.

1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch assembly.
2. Test for less than 1.0 ohm between the appropriate ground circuit listed below and ground:

•	RPO X88/Z88 ground circuit terminal 3

•	RPO Z75 ground circuit terminal 5

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that the scan tool Park Assist Switch parameter is Inactive.

⇒	If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the object alarm module.

4. Ignition OFF, connect a 3A fused jumper wire between signal circuit terminal 2 and ground.
5. Ignition ON, verify that the scan tool Park Assist Switch parameter is Active.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the object alarm module.

6. If all circuits test normal, test or replace the I/P multifunction switch assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.