Circuit/System Verification

Ignition ON.
Verify the park assist system is enabled through the parking assist switch.
- If the park assist system is not enabled
  Refer to the vehicle owners manual for instructions on enabling the system.
- If the park assist system is enabled
Verify the scan tool Park Assist Switch parameter changes between Active and Inactive while pressing and releasing the parking assist switch.
- If the parameter does not change between Active and Inactive
  Refer to Circuit/System Testing - Parking Assist Switch Circuit Malfunction .
- If the parameter changes between Active and Inactive
Verify the parking assist switch indicator turns On and Off while commanding the Park Assist Switch LED On and Off with a scan tool.
- If the indicator does not turn ON and OFF
  Refer to Circuit/System Testing - Parking Assist Switch Indicator Circuit Malfunction .
- If the indicator does turn ON and OFF
Transmission in R.
Verify the Engine Control Module (ECM) scan tool Reverse Position Switch parameter is Active.
- If the parameter is not Active
  Refer to Backup Lamps Malfunction .
- If the parameter is Active
Transmission in R.
Verify the scan tool Park Assist System Status parameter displays Enable.
- If the parameter is not Enabled
  Refer to Diagnostic Aids to determine the cause of the inhibit.
- If the parameter is Enabled
All OK.