Test A: The Power Seat Is Inoperative

PINPOINT TESTS

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

Refer to Inspection and Verification and the Symptom Chart for direction to the appropriate Pinpoint Test. Inspection and Verification Symptom Related Diagnostic Procedures


PINPOINT TEST A: THE POWER SEAT IS INOPERATIVE

A1-A2:

A3-A4:

Normal Operation
The seat control switch is powered by battery voltage to circuit 517 (BK/WH) and is supplied ground on circuit 57 (BK). The seat control switch applies battery power and ground directly to one of 3 bi-directional seat track motors, respectively, to move the seat. Toggling the seat control switch to the opposite position reverses the voltage polarity applied to the respective seat motor and moves the seat in the opposite direction.

Possible Causes
An inoperative power seat can be caused by:
- a faulty circuit breaker.
- a faulty circuit.
- a faulty seat control switch.
- a faulty seat track.