LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1186 (Seating System - Front) >> Diagnosis And Testing >> Front Seats >> Pinpoint Test(s) >> Pinpoint Test Z : DTC B19A5 >> Pinpoint Test Z : DTC B19A5

Pinpoint Test Z : DTC B19A5

WARNING: This page is about a different car, the 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
  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. Z1 CHECK CUSHION BLOWER MOTOR SPEED CONTROL CIRCUIT FOR A SHORT TO GROUND

    • Disconnect: Passenger Side Airbag In-line C3049 .

    • Disconnect: Passenger Cushion Blower Motor C3040 .

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3265C-3
      GFD229380Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  Z2
    No  REPAIR the circuit. GO to  Z5

  3. Z2 CHECK CUSHION BLOWER MOTOR SPEED CONTROL CIRCUIT AND BLOWER GROUND CIRCUIT FOR A SHORT TOGETHER

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3265C-3
      GFD229380Courtesy of FORD MOTOR COMPANY
      		 C3265C-7

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  Z3
    No  REPAIR the circuits. GO to  Z5

  4. Z3 DETERMINE CUSHION BLOWER MOTOR OR SCME (FRONT SEAT CLIMATE CONTROL MODULE) FAILURE

    • Remove the cushion blower motor from the driver seat and install it on the passenger seat.

    • Connect: Passenger Cushion Blower Motor C3040 .

    • Start the engine and check operation of the passenger seat climate controlled seat system.

    Does the seat operate with the cushion blower motor from the other seat installed? 

    Yes  INSTALL a new seat cushion blower motor. REFER to: Front Seat Cushion Blower Motor . GO to  Z5
    No  GO to  Z4

  5. Z4 CHECK THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all of the SCME connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins as necessary
      • pushed-out pins - install new pins as necessary

    • Reconnect the SCME connectors. Make sure they seat and latch correctly.

    • NOTE: Do not reconnect Passenger Side Airbag In-line C3049 at this time.

      Reconnect all previously disconnected connectors.

    • Ignition ON.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new SCME. REFER to: Front Seat Climate Control Module [SCME] . GO to  Z5
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. GO to  Z5

  6. Z5 VERIFY THE SRS (SUPPLEMENTAL RESTRAINT SYSTEM) PROVES OUT SUCCESSFULLY

    • Connect: Passenger Side Airbag In-line C3049 .

    • Connect all previously disconnected connectors.

    Did the SRS prove out successfully? 

    Yes  Repair is complete. RETURN the vehicle to the customer.
    No  REFER to: Airbag Supplemental Restraint System (SRS) .
scientia non olet · About LEMON Manuals