Symptom Related Diagnostic Procedures

*POWER SEAT MOTOR(S) INOPERATIVE

For a complete wiring diagram Consult Diagrams/Electrical





Diagnostic Test

1. DTC PRESENT
Turn the ignition on.
With the scan tool, check for related DTC's set in the MHSAPM and either the DDM and/or the PDM.

NOTE: If there is DTC that is stored, do a wiggle test with related connectors and wiring to attempt to recreate condition.

Does the scan tool display any active DTC's?

Yes

- Diagnose and repair the DTC(s).
- Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Testing and Inspection

No

- Go To2

2. MONITOR SEAT SWITCH
Turn the ignition on.
With the scan tool in door module input/outputs, read the power seat switch position while moving the power seat switch.
Does the switch display change to the correct position?

Yes

- Go To3

No

- Check the seat Switch MUX and MUX Return wires from the switch to the door module for an open condition. If OK, replace the power seat switch.
- Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Testing and Inspection

3. DOOR MODULE
Turn the ignition on.
With the scan tool in MSM, actuate the inoperative seat position.
Does the seat move?

Yes

- Replace the appropriate door module.
- Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Testing and Inspection

No

- Go To4

4. POWER SEAT MOTOR CIRCUIT




Disconnect the inoperative power seat motor connector.
Connect a test light across the power seat motor driver circuits.
With the scan tool in MSM, actuate the inoperative seat motor and observe the test light.
Does the test light illuminate brightly?

Yes

- Replace the power seat motor as necessary.
- Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Testing and Inspection

No

- Check the wiring from the seat motor to the MHSAPM for an open condition. If OK, replace the MHSAPM.
- Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1. Testing and Inspection