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Pinpoint Test K: The Door Locks Operate Only One Way

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to REMOTE KEYLESS ENTRY AND ALARM for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Handles, Locks, Latches and Entry Systems - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    DDM B108F:23 Cabin Lock/Unlock Switch: Signal Stuck Low Sets when the DDM detects a short to ground from one of the door lock control switch input circuits.
    PDM B108F:23 Cabin Lock/Unlock Switch: Signal Stuck Low Sets when the PDM detects a short to ground from one of the door lock control switch input circuits.

    Possible Sources 

    • Wiring, terminals or connectors
    • Door lock control switch
    • PDM
    • DDM

  2. K1 CHECK FOR DDM (DRIVER DOOR MODULE) / PDM (PASSENGER DOOR MODULE) DTC (DIAGNOSTIC TROUBLE CODE) B108F:23

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the DDM and the PDM self-tests.

    Is DTC B108F:23 present? 

    Yes  GO to  K2
    No  GO to  K4

  3. K2 ISOLATE THE DOOR LOCK CONTROL SWITCH

    • Ignition OFF.

    • Disconnect Driver Door Lock Control Switch C505 (without memory seats) or C541 (with memory seats) (DTC set in DDM).

    • Disconnect Passenger Door Lock Control Switch C605 (DTC set in PDM).

    • Ignition ON.

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

    • Using a diagnostic scan tool, carry out the DDM or the PDM self-test.

    Is DTC B108F:23 still present? 

    Yes  GO to  K3
    No  INSTALL a new door lock control switch. REFER to: Front Door Lock Control Switch .

  4. K3 CHECK THE DOOR LOCK CONTROL SWITCH INPUT CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect DDM C501A (DTC set in DDM).

    • Disconnect PDM C652A (DTC set in PDM).

    • If the DTC set in the DDM, measure:
      Positive Lead Measurement / Action Negative Lead
      C501A-10
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 Ground
      C501A-20
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 Ground

    • If the DTC set in the PDM, measure:
      Positive Lead Measurement / Action Negative Lead
      C652A-10
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 Ground
      C652A-20
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  For a concern with the passenger door lock control switch, GO to  K8 For a concern with the driver door lock control switch, GO to  K9
    No  REPAIR the circuit in question.

  5. K4 CHECK THE LOCK REQUEST INPUT CIRCUIT

    • Ignition OFF.

    • Disconnect the suspect door lock control switch.

    • For the driver door lock control switch, connect:
      Positive Lead Measurement / Action Negative Lead
      C541-2, (with memory seats)
      GFD562064Courtesy of FORD MOTOR COMPANY
      		 C541-3
      Positive Lead Measurement / Action Negative Lead
      C505-4, (without memory seats)
      GFD562064Courtesy of FORD MOTOR COMPANY
      		 C505-3

    • For the passenger door lock control switch, connect:
      Positive Lead Measurement / Action Negative Lead
      C605-1
      GFD562064Courtesy of FORD MOTOR COMPANY
      		 C605-2

    • Remove the fused jumper wire.

    Do the doors lock? 

    Yes  GO to  K6
    No  GO to  K5

  6. K5 CHECK THE LOCK REQUEST INPUT CIRCUIT FOR AN OPEN

    • Disconnect DDM C501A (driver door lock control switch).

    • Disconnect PDM C652A (passenger door lock control switch).

    • For the driver door lock control switch, measure:
      Positive Lead Measurement / Action Negative Lead
      C541-2, (with memory seats)
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 C501A-20
      Positive Lead Measurement / Action Negative Lead
      C505-4, (without memory seats)
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 C501A-20

    • For the passenger door lock control switch, measure:
      Positive Lead Measurement / Action Negative Lead
      C605-1
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 C652A-20

    Is the resistance less than 3 ohms? 

    Yes  For a concern with the passenger door lock control switch, GO to  K8 For a concern with the driver door lock control switch, GO to  K9
    No  REPAIR the circuit.

  7. K6 CHECK THE UNLOCK REQUEST INPUT CIRCUIT

    • For the driver door lock control switch, connect:
      Positive Lead Measurement / Action Negative Lead
      C541-1, (with memory seats)
      GFD562064Courtesy of FORD MOTOR COMPANY
      		 C541-3
      Positive Lead Measurement / Action Negative Lead
      C505-2, (without memory seats)
      GFD562064Courtesy of FORD MOTOR COMPANY
      		 C505-3

    • For the passenger door lock control switch, connect:
      Positive Lead Measurement / Action Negative Lead
      C605-3
      GFD562064Courtesy of FORD MOTOR COMPANY
      		 C605-2

    • Remove the fused jumper wire.

    Do the doors unlock? 

    Yes  INSTALL a new door lock control switch. REFER to: Front Door Lock Control Switch .
    No  GO to  K7

  8. K7 CHECK THE UNLOCK REQUEST INPUT CIRCUIT FOR AN OPEN

    • Disconnect DDM C501A (driver door lock control switch).

    • Disconnect PDM C652A (passenger door lock control switch).

    • For the driver door lock control switch, measure:
      Positive Lead Measurement / Action Negative Lead
      C541-1, (with memory seats)
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 C501A-10
      Positive Lead Measurement / Action Negative Lead
      C505-2, (without memory seats)
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 C501A-10

    • For the passenger door lock control switch, measure:
      Positive Lead Measurement / Action Negative Lead
      C605-3
      GFD561510Courtesy of FORD MOTOR COMPANY
      		 C652A-10

    Is the resistance less than 3 ohms? 

    Yes  For a concern with the passenger door lock control switch, GO to  K8 For a concern with the driver door lock control switch, GO to  K9
    No  REPAIR the circuit.

  9. K8 CHECK FOR CORRECT PDM (PASSENGER DOOR MODULE) OPERATION

    • Disconnect and inspect all the PDM connectors.

    • Repair:

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

    • Reconnect the PDM connectors and make sure they seat and latch correctly.

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

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM, or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new PDM. REFER to: Passenger Door Module (PDM) .
    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.

  10. K9 CHECK FOR CORRECT DDM (DRIVER DOOR MODULE) OPERATION

    • Disconnect and inspect all the DDM connectors.

    • Repair:

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

    • Reconnect the DDM connectors and make sure they seat and latch correctly.

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

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM, or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new DDM. REFER to: Driver Door Module (DDM) .
    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.
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