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 / Vehicle - In Service Mode
- Verify the scan tool parameter: Brake Pedal Applied = Inactive
- If not the specified state
- Refer to Stop Lamps Malfunction
- Go to next step: If the specified state
- Verify the scan tool Driver Seat Belt Status and Passenger Seat Belt Status parameter changes between Buckled and Unbuckled when the seat belt is buckled and unbuckled.
- If the Driver Seat Belt Status and Passenger Seat Belt Status parameter does not change
Refer to Symptoms - Seat Belts
- Go to next step: If the Driver Seat Belt Status and Passenger Seat Belt Status parameter changes
- If the Driver Seat Belt Status and Passenger Seat Belt Status parameter does not change
- Operate the component: Brake Pedal - Pressed
Operate the component: S3 Transmission Shift Lever - Park & Drive
- If not the specified state
Refer to: Circuit/System Testing
- Go to next step: If the specified state
- If not the specified state
- All OK.
Vehicles with the Safety Belt Assurance System, will not allow the vehicle to shift out of PARK if the driver and front outboard passenger, if present, do not have safety belt(s) buckled. Buckle the safety belt(s) to unlock the shifter. This system may not allow the vehicle to shift out of PARK if an object such as a briefcase, handbag, grocery bag, laptop, or other electronic devices is on the front outboard passenger seat. If this happens, remove the object from the seat or buckle the safety belt.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.