Circuit/System Verification

Ignition ON.
Verify the scan tool Park Assist Switch parameter while pressing and releasing the parking assist switch. The parameter should change between Active and Inactive.
- 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
Command the Park Assist Switch LED output control On and Off with the scan tool. The parking assist switch indicator should turn On and Off when changing between the commanded states.
- 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.
- If the parameter is Enabled
All OK.