Test O: The Power Lumbar Is Inoperative - Driver

PINPOINT TEST O: THE POWER LUMBAR IS INOPERATIVE - DRIVER

O1-O3:

O3-O4:

O5:

Normal Operation
The seat control switch is powered by battery voltage on circuit SBB45 (GY/RD) or SBP12 (GN/RD) (memory seat) and is supplied ground on circuit GD143 (BK/VT) or GD133 (BK) (memory seat). When the lumbar knob on the seat control switch is pressed, voltage and ground are supplied to the power lumbar motor. When pressing the switch in the opposite direction, voltage polarity to the power lumbar motor is reversed, moving the lumbar assembly 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.