Pinpoint Test C: The Door Locks Operate Only One Way
WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- C1 CHECK THE RECORDED SJB DTCs FROM ON-DEMAND SELF-TEST
- Check the recorded results from the SJB self-test.
- Is DTC B2A25 present?
- YES : Go to Pinpoint Test E .
- NO : Go to C2.
- C2 VERIFY THE OPERATION OF BOTH DOOR LOCK CONTROL SWITCHES
- Key in OFF position.
- Press the LOCK and UNLOCK button of both door lock control switches while observing the door lock operation.
- Do the door locks operate only one way from both switches?
- C3 CHECK CIRCUIT CPL42 (GY/YE) (LOCK INPUT) OR CIRCUIT CPL43 (VT/GY) (UNLOCK INPUT) FOR AN OPEN (SINGLE SWITCH INOPERATIVE)
- Disconnect: Suspect Door Lock Control Switch
- Unlock the doors from the working door lock control switch.
- Observe the door locks while connecting a fused (5A) jumper wire between the LH door lock control switch C505-1, circuit CPL42 (GY/YE), harness side and the LH door lock control switch C505-4, circuit GD133 (BK), harness side; or between the RH door lock control switch C605-1, circuit CPL42 (GY/YE), harness side and the RH door lock control switch C605-4, circuit GD140 (BK/GN), harness side.
- Remove the jumper wire.
- Observe the door locks while connecting a fused (5A) jumper wire between the LH door lock control switch C505-3, circuit CPL43 (VT/GY), harness side and the LH door lock control switch C505-4, circuit GD133 (BK), harness side; or between the RH door lock control switch C605-3, circuit CPL43 (VT/GY), harness side and the RH door lock control switch C605-4, circuit GD140 (BK/GN), harness side.
- Do the doors lock and unlock with the jumper wire?
Fig 1: Connecting Fused (5A) Jumper Wire Between LH Door Lock Control Switch C505-1, Circuit CPL42 (GY/YE)Courtesy of FORD MOTOR CO.
Fig 2: Connecting Fused (5A) Jumper Wire Between LH Door Lock Control Switch C505-3, Circuit CPL43 (VT/GY)Courtesy of FORD MOTOR CO.
- YES : INSTALL a new door lock control switch. REFER to Door Lock Control Switch . TEST the system for normal operation.
- NO : REPAIR the input circuit in question. TEST the system for normal operation.
- C4 CHECK CIRCUIT CPL42 (GY/YE) (LOCK INPUT) OR CIRCUIT CPL43 (VT/GY) (UNLOCK INPUT) FOR AN OPEN (BOTH SWITCHES INOPERATIVE)
- Disconnect: LH Door Lock Control Switch C505
- Disconnect: SJB C2280c
- If the doors do not lock, measure the resistance between the SJB C2280c-17, circuit CPL42 (GY/YE), harness side and the LH door lock control switch C505-1, circuit CPL42 (GY/YE), harness side.
- If the doors do not unlock, measure the resistance between the SJB C2280c-4, circuit CPL43 (VT/GY), harness side and the LH door lock control switch C505-3, circuit CPL43 (VT/GY), harness side.
- Is the resistance less than 5 ohms?
Fig 3: Measuring Resistance Between SJB C2280C-17, Circuit CPL42 (GY/YE) & LH Door Lock Control Switch C505-1Courtesy of FORD MOTOR CO.
Fig 4: Measuring Resistance Between SJB C2280C-4, Circuit CPL43 (VT/YE) & LH Door Lock Control Switch C505-3Courtesy of FORD MOTOR CO.
- YES : Go to C5.
- NO : REPAIR the circuit in question. TEST the system for normal operation.
- C5 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- YES : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
- NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.