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.
Diagnostic Test
- CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS AND BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM) NOTE:
Make sure that the battery is fully charged.
- Turn the ignition on, then off and then on again.
- With the scan tool, read the OCM DTCs.
Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?
Yes
- Diagnose and repair the DTC. for a complete list of DTCs. Refer to Diagnosis and Testing .
No
- Go To 2.
- VERIFY THAT DTC B1B82-PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR PERFORMANCE IS ACTIVE
- With the scan tool, read OCM DTCs.
Does the scan tool display active: B1B82- PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR PERFORMANCE?
Yes
- Go To 3.
No
- Perform the OCS INTERMITTENT TEST. Refer to OCS INTERMITTENT TEST .
- With the scan tool, read OCM DTCs.
- INSPECT PASSENGER SEAT HARNESS WIRES AND CONNECTORS WARNING:
Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
- Using the wiring diagram / schematic as a guide, inspect the Passenger Seat Harness wiring and connectors. Look for chafed, pierced, pinched or partially broken wires and broken, bent, pushed out, spread, corroded or contaminated terminals.
Are any of these conditions present?
Yes
- Replace the Passenger Seat Harness in accordance with the Service Information.
- Perform the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure. Refer to RE-ZERO OCM SEAT WEIGHT SENSORS .
NOTE:Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.
No
- Go To 4.
- Using the wiring diagram / schematic as a guide, inspect the Passenger Seat Harness wiring and connectors. Look for chafed, pierced, pinched or partially broken wires and broken, bent, pushed out, spread, corroded or contaminated terminals.
- PERFORM THE OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST NOTE:
Make sure that the battery is fully charged.
NO RELATED
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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.