Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit/System Verification
- Ignition ON, transmission in R.
- Verify the scan tool Parking 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 InactiveÂ
Refer to Parking Assist Switch Circuit Malfunction below.
- If the parameter changes between Active and InactiveÂ
- If the parameter does not change between Active and InactiveÂ
- Verify the parking assist switch indicator turns On and Off when commanding the Parking Assist Switch LED output control On and Off with a scan tool.
- If the indicator does not turn ON and OFFÂ
Refer to Parking Assist Switch Indicator Circuit Malfunction below.
- If the indicator turns ON and OFFÂ
- If the indicator does not turn ON and OFFÂ
- Transmission in R, verify the scan tool Calculated Transmission Range parameter is Reverse.
- If the parameter is not ReverseÂ
Refer to Backup Lamps Malfunction (Manual Transmission) or Backup Lamps Malfunction (Automatic transmission) .
- If the parameter is ReverseÂ
- If the parameter is not ReverseÂ
- Transmission in R, verify the scan tool Parking Assist System Status parameter is Enabled.
- If the parameter is not EnabledÂ
Refer to Diagnostic Aids above to determine the cause of the inhibit.
- If the parameter is EnabledÂ
- If the parameter is not EnabledÂ
- All OK.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.