Test H

PINPOINT TEST H: THE POWER LUMBAR IS INOPERATIVE - DRIVER

Test H1:

Test H2:

Test H3-H4:

Normal Operation
The power lumbar operation is incorporated into the power seat switch. The driver power seat switch is powered by battery voltage on circuit 1001 (WH/YE) and is supplied ground on circuit 1205 (BK). When the lumbar knob of the power seat switch is pressed, voltage and ground are supplied to the power lumbar motor. When pressing the lumbar knob in the opposite direction, the power seat switch reverses the polarity to the power lumbar motor, which moves the lumbar mechanism in the opposite direction.

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