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
This system is serviced as a kit (seat foam, module and/or sensing mat). Perform a Passenger Presence System Preload whenever a component is replaced, refer to Passenger Presence System Rezeroing . Inspect component connectors for damage or corrosion. Repair or replace the affected component/connector:
- Passenger presence module
- Passenger presence module harness connector
- Seat wiring harness to vehicle harness connector
The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click.
- Verify the DTC remains current while moving the passenger seat forward and backward through it's full range of motion.
- If the DTC changes to History
If the status changes this could be indication of a seat to vehicle harness connection issue, refer to Circuit/System Testing.
- Go to next step: If the DTC remains Current
- If the DTC changes to History
- Verify with the scan tool, the fault does not change status while moving the harness near each connector listed below.
- K85 Passenger Presence Module
- B60 Passenger Presence Sensor
- Any seat harness inline
- If the status changes
If the reading is erratic while moving the harness, perform the following:
- If the status changes
- Inspect each connector terminal for damage or corrosion and repair as necessary.
- Ensure each connector and CPA is correctly seated.
- Go to next step: If the status does not change
- 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.