Test A: The Power Seat Is Inoperative - Driver, With Power Recliner

PINPOINT TESTS

CAUTION: Electronic modules are sensitive to electrostatic discharge. If exposed to these charges, damage can result.

Refer to Inspection and Verification, the Driver Seat Module (DSM) Diagnostic Trouble Code (DTC) Index and the Symptom Chart for direction to the appropriate Pinpoint Test. Inspection and Verification Diagnostic Trouble Code Tests and Associated Procedures Symptom Related Diagnostic Procedures

PINPOINT TEST A: THE POWER SEAT IS INOPERATIVE - DRIVER, WITH POWER RECLINER

A1:

A2:

Normal Operation
The driver seat control switch is powered by battery voltage to the driver seat control switch, circuit 566 (DG), and is supplied ground on driver circuit 1205 (BK). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor or power recliner motor to move the seat or backrest. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor or power recliner motor, which moves the seat or backrest in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (FORWARD/REARWARD) and vertically (front UP/DOWN and rear UP/DOWN). There is an additional motor in the power recliner mechanism to move the seat backrest forward and rearward. If a new motor needs to be installed, it is necessary to install an entire power seat track or power recliner mechanism.

Possible Causes
An inoperative driver power seat can be caused by:
- a fuse.
- wiring, terminals or connectors.
- a faulty seat control switch.
- a faulty power seat motor (power seat track).