Pinpoint Test K : The Door Locks Operate Only One Way

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

K1 CHECK FOR DOOR LOCK SWITCH DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Using a diagnostic scan tool, perform the self-test for the following modules:
  - DDM
  - PDM
Is DTC B108F:23 set in the DDM or PDM?

Yes GO to K2

No GO to K4

K2 ISOLATE THE DOOR LOCK CONTROL SWITCH
- Ignition OFF.
- Disconnect: Suspect door lock control switch.
- Ignition ON.
- Using a diagnostic scan tool, perform the self-test for the following modules:
  - DDM
  - PDM
Is DTC B108F:23 set in the DDM or PDM?

Yes GO to K3

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

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

Ignition OFF.

For DTC B108F:23 set in the DDM, Disconnect:
- DDM C501A .

For DTC B108F:23 set in the PDM, Disconnect:
- PDM C652A .

If DTC B108F:23 is set in the DDM, measure:

Positive Lead	Measurement / Action	Negative Lead
C501A-10	Courtesy of FORD MOTOR COMPANY	Ground
C501A-20	Courtesy of FORD MOTOR COMPANY	Ground

If DTC B108F:23 is set in the PDM, measure:

Positive Lead	Measurement / Action	Negative Lead
C652A-10	Courtesy of FORD MOTOR COMPANY	Ground
C652A-20	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes	For the DDM, GO to K8. For the PDM, GO to K9

No	REPAIR the circuit in question.

K4 CHECK THE LOCK REQUEST INPUT CIRCUIT

Ignition OFF.

Disconnect: Suspect door lock control switch.

For the LHF door lock control switch, connect:

Lead 1	Measurement / Action	Lead 2
C505-1	Courtesy of FORD MOTOR COMPANY	C505-2

For the RHF door lock control switch, connect:

Lead 1	Measurement / Action	Lead 2
C605-1	Courtesy of FORD MOTOR COMPANY	C605-2

Remove the fused jumper wire.

Do the doors lock?

Yes

GO to K6

GO to K5

K5 CHECK THE LOCK REQUEST INPUT CIRCUIT FOR AN OPEN

Disconnect: DDM C501A for vehicles with a driver door lock control switch concern.

Disconnect: PDM C652A for vehicles with a passenger door lock control switch concern.

For the LHF door lock control switch, measure:

Positive Lead	Measurement / Action	Negative Lead
C505-1	Courtesy of FORD MOTOR COMPANY	C501A-20

For the RHF door lock control switch, measure:

Positive Lead	Measurement / Action	Negative Lead
C605-1	Courtesy of FORD MOTOR COMPANY	C652A-20

Is the resistance less than 3 ohms?

Yes	* For a concern with the driver door lock control switch, GO to K8* For a concern with the passenger door lock control switch, GO to K9

No	REPAIR the circuit.

K6 CHECK THE UNLOCK REQUEST INPUT CIRCUIT

For the LHF door lock control switch, connect:

Lead 1	Measurement / Action	Lead 2
C505-3	Courtesy of FORD MOTOR COMPANY	C505-2

For the RHF door lock control switch, connect:

Lead 1	Measurement / Action	Lead 2
C605-3	Courtesy 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 .

GO to K7

K7 CHECK THE UNLOCK REQUEST INPUT CIRCUIT FOR AN OPEN

Disconnect: DDM C501A for vehicles with a driver door lock control switch concern.

Disconnect: PDM C652A for vehicles with a passenger door lock control switch concern.

For the LHF door lock control switch, measure:

Positive Lead	Measurement / Action	Negative Lead
C505-3	Courtesy of FORD MOTOR COMPANY	C501A-10

For the RHF door lock control switch, measure:

Positive Lead	Measurement / Action	Negative Lead
C605-3	Courtesy 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 K9. For a concern with the driver door lock control switch, GO to K8

No	REPAIR the circuit.

K8 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.

K9 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.