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.
- Verify all the radio speakers operate by adjust the radio balance and fade to each speaker.
- If any speaker does not operate properly
Refer to Speaker Malfunction (UQA) and Speaker Malfunction (UQS) .
- If the speakers operate properly
- If any speaker does not operate properly
- Verify the scan tool Driver Seat Belt Status and Passenger Seat Belt Status parameters are Buckled when both front seat belts are buckled.
- If not Buckled
Refer to Seat Belt Indicator Malfunction - Driver .
- If buckled
- If not Buckled
- Verify the scan tool Headlamp On Switch parameter is Inactive when the headlamps are OFF.
- If not Inactive
Refer to Headlamps Malfunction
- If Inactive
- If not Inactive
- Verify the scan tool Park Lamps Switch parameter is Inactive when the park lamp switch is OFF.
- If not Inactive
- If Inactive
- Verify the scan tool Left Turn Signal Switch and Right Turn Signal Switch parameters are Inactive while the turn signal switch is OFF.
- If not Inactive
- If Inactive
- Verify the scan tool Park Brake Switch parameter is Inactive when the park brake is OFF.
- If not Inactive
Refer to Park Brake System Diagnosis
- If Inactive
- If not Inactive
- Verify that all scan tool parameters listed below are Inactive when all the doors are closed.
- Driver Door Ajar Switch
- Passenger Door Ajar Switch
- If not Inactive
Refer to Door Ajar Indicator Malfunction
- If Inactive
- Verify the scan tool Key in Ignition Status parameter is Inactive when the key is out of the ignition.
- If not Inactive
Refer to Circuit/System Testing.
- If Active
- If not Inactive
- All OK
NO RELATED
Use the Manual With the Right Hardware
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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.