Pinpoint Test C : The Power Lumbar Is Inoperative -- Driver
WARNING: This page is about a different car, the 2018 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
- WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
- C1 CHECK FOR VOLTAGE TO THE SEAT LUMBAR MOTOR
- REFER to: Supplemental Restraint System (SRS) Depowering .
- Disconnect: Driver Side Airbag In-line C3051.
- Disconnect: Driver Seat Lumbar Motor C3215.
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NOTE: The voltage being measured changes polarity depending upon which direction the seat control switch is activated.
While pushing the lumbar switch in both directions, measure:
Positive Lead Measurement / Action Negative Lead C3215-A C3215-B
Is the voltage greater than 11 volts when the seat control switch is operated in both directions?
Yes INSTALL a new driver seat power lumbar assembly. REFER to: Front Seat Power Lumbar Assembly . GO to C3 No GO to C2 - C2 CHECK THE SEAT LUMBAR MOTOR CIRCUITS FOR AN OPEN
- Disconnect: Driver Seat Control Switch C369.
Are the resistances less than 3 ohms?
Yes INSTALL a new driver seat control switch. REFER to: Front Seat Control Switch . GO to C3 No REPAIR the circuit in question. GO to C3 - C3 VERIFY THE SRS (SUPPLEMENTAL RESTRAINT SYSTEM) PROVES OUT SUCCESSFULLY
- REFER to: Supplemental Restraint System (SRS) Depowering .
- Connect: Driver Side Airbag In-line C3051.
- Connect all previously disconnected connectors.
- REFER to: Supplemental Restraint System (SRS) Repowering .
Did the SRS prove out successfully?
Yes Repair is complete. RETURN the vehicle to the customer. No REFER to: Airbag Supplemental Restraint System (SRS) .