Pinpoint Test C : The Power Lumbar Is Inoperative - Driver, Without Multi-Contour Seats
WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- 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 .
- While pushing the lumbar switch in both directions, measure:
Positive Lead Measurement / Action Negative Lead C3215-A C3215-B
NOTE: The voltage being measured changes polarity depending upon which direction the seat control switch is activated.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 Lumbar Assembly . GO to C3 No GO to C2 - C2 CHECK THE SEAT LUMBAR MOTOR CIRCUITS FOR AN OPEN
- If equipped with 8-way seat, measure:
Positive Lead Measurement / Action Negative Lead C360-4 C3215-B C360-3 C3215-A
- If equipped with 10-way seat, measure:
Positive Lead Measurement / Action Negative Lead C3387-2 C3215-B C3387-6 C3215-A
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 - If equipped with 8-way seat, measure:
- 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) .
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.