Test O: The Power Lumbar Is Inoperative

PINPOINT TEST O: THE POWER LUMBAR IS INOPERATIVE

O1:

O1-O3:

O3-O4:

O5:

Normal Operation
The seat control switch is powered by battery voltage on circuit SBB14 (BN/RD) (power seat) or SBP01 (RD) (memory seat) and is supplied ground on circuit GD133 (BK). When the knob of the seat control switch is pressed, voltage and ground are supplied to the power lumbar motor. When pressing the lumbar knob in the opposite direction, the lumbar control switch reverses the polarity to the power lumbar motor, which moves the lumbar mechanism in the opposite direction.

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