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Pinpoint Test E : The Power Lumbar Is Inoperative -- Passenger

  1. 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.

  2. E1 CHECK FOR VOLTAGE TO THE SEAT LUMBAR MOTOR

    • WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

      Ignition OFF.

    • Disconnect: Passenger Side Airbag In-line C3206.

    • Disconnect: Passenger Seat Lumbar Motor C3216.

    • 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
      C3216-A
      GFD484965Courtesy of FORD MOTOR COMPANY
      		 C3216-B

    Is the voltage greater than 11 volts when the seat control switch is operated in both directions? 

    Yes  INSTALL a new passenger seat power lumbar assembly. REFER to: Front Seat Lumbar Assembly  . GO to  E3
    No  GO to  E2

  3. E2 CHECK THE SEAT LUMBAR MOTOR CIRCUITS FOR AN OPEN

    • Disconnect: Passenger Seat Control Switch C3388.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3388-20
      GFD484570Courtesy of FORD MOTOR COMPANY
      		 C3216-B
      C3388-2
      GFD484570Courtesy of FORD MOTOR COMPANY
      		 C3216-A

    Are the resistances less than 3 ohms? 

    Yes  INSTALL a new passenger seat control switch. REFER to: Front Seat Control Switch  . GO to  E3
    No  REPAIR the circuit in question. GO to  E3

  4. E3 CHECK FOR SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)

    • WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

      Ignition OFF.

    • Connect: Passenger Side Airbag In-line C3206.

    • Connect all previously disconnected connectors.

    • Ignition ON.

    • Using a diagnostic scan tool, clear the RCM Diagnostic Trouble Codes (DTCs).

    • Cycle the ignition OFF then ON.

    • Using a diagnostic scan tool, perform RCM self-test.

    Are any RCM Diagnostic Trouble Codes (DTCs) retrieved during self-test? 

    Yes  REFER to: Airbag Supplemental Restraint System (SRS) .
    No  Repair is complete. RETURN the vehicle to the customer.
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