Circuit/System Verification

Ignition ON.
Verify that no DTCs are set.
- If any DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no DTCs are set
Verify the appropriate scan tool Driver or Passenger seat switch parameters listed below change between Inactive and Forward/Rearward or Up/Down when pressing the appropriate switch.
- Seat Horizontal Switch
- Seat Cushion Front Vertical Switch
- Seat Cushion Rear Vertical Switch
- Seat Back Switch
- If the parameter does not change
  Test or replace the S64 Seat Adjuster Switch.
- If the parameter changes
Verify the seat directional motors listed below operate while operating the appropriate seat switches in both directions.
- M50 Seat Front Vertical Motor
- M55 Seat Rear Vertical Motor
- M51 Seat Horizontal Motor
- M56 Seat Recline Motor
- If any seat motor does not operate
  Refer to Circuit/System Testing.
- If all seat motors operate
All OK.