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
- VERIFY COMPLAINT
- Turn the ignition off.
- Move the front passenger seat to the full rear position. Verify that the seat is empty, the seat back is in the normal upright position and that the seat is not interfering with any interior components.
- Verify that all related connectors are properly seated and locked.
- Turn the ignition on.
- With the scan tool in OCM, select Data Display and note the Passenger Seat Weight Sensor voltage for all four sensors (Left Front, Right Front, Left Rear and Right Rear).
- Move the front passenger seat to the mid track position.
- Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors.
- Move the front passenger seat to the full forward position.
- Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.4 Volts.
to 3.6 Volts for each sensor in each position (full rear, mid track, and full forward).
Is any sensor voltage reading out of the acceptable range in any position?
Yes
- Go To 2.
No
- Perform the B1BA7-Occupant Classification System Verification Required. Refer to Diagnosis and Testing .
NOTE:If the test passes, the seat weight sensing system is working properly. Return to the procedure that directed you to this procedure. Refer to Diagnosis and Testing .
- CHECKING FOR BENT FLOOR PAN
- Turn the ignition off.
- Loosen all of the mounting screws retaining the front passenger seat to the vehicle crossmembers, but do not remove them. Verify that the seat is loose and that no binding exists between the seat and the crossmembers.
- Move the front passenger seat to the full rear position and then to the full forward position.
- Tighten all of the mounting screws to specification. Refer to Specifications .
- Move the front passenger seat to the full rear position.
- Turn the ignition on.
- Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors.
- Move the front passenger seat to the mid track position.
- Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors.
- Move the front passenger seat to the full forward position.
- Using the scan tool, note the Passenger Seat Weight Sensor voltage for all four sensors. The voltage should be from 1.4 Volts to 3.6 Volts for each sensor in each position.
Is any sensor voltage reading out of the acceptable range in any position?
Yes
- Go To 3.
No
- Perform the B1BA7-Occupant Classification System Verification Required. Return to the procedure that directed you to this procedure. Refer to Diagnosis and Testing .
NOTE:If the test passes, the seat weight sensing system is working properly. Return to the procedure that directed you to this procedure. Refer to Diagnosis and Testing .
- CHECKING SEAT TO RISER STRESS 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.
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.