Pinpoint Test A: All Door Locks Are Inoperative From One Switch

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK THE SUSPECT DOOR LOCK CONTROL SWITCH
- Key in OFF position.
- Disconnect: Suspect Door Lock Control Switch Connector.
- Carry out the door lock control switch component testing.
  Refer to the appropriate SYSTEM WIRING DIAGRAMS for schematic and connector information.
- Is the suspect door lock control switch OK?
1. Yes : If no DTCs were retrieved, GO to A2.
  If DTCs B1309 or B1341 were retrieved, DISCONNECT smart junction box (SJB) C2280c and GO to A4.
2. No : INSTALL a new door lock control switch. CLEAR the DTCs. REPEAT the self-test.
A2 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between the suspect door lock control switch connector pin 3, circuit 57 (BK), harness side and ground.
  
  Fig 1: Checking Circuit 57 (BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes : GO to A3.
2. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

A3 CHECK DOOR LOCK CONTROL SWITCH CIRCUITS FOR AN OPEN

Disconnect: Smart Junction Box (SJB) C2280c.

Measure the resistance between the suspect door lock control switch connector, harness side and the SJB C2280c, harness side as follows:

Door Lock Control Switch Connector	Circuit	SJB C2280c
C505 pin 1 (Driver side)	120 (PK/LG)	Pin 9
C505 pin 5 (Driver side)	119 (PK/YE)	Pin 5
C605 pin 1 (Passenger side)	1297	(YE/RD) pin 14
C605 pin 5 (Passenger side)	1296	(OG/BK) pin 10

Fig 2: Checking Door Lock Control Switch Circuits For An Open

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : GO to A4.
No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

A4 CHECK DOOR LOCK CONTROL SWITCH CIRCUITS FOR SHORT TO GROUND
- If the driver side door lock control switch is inoperative, measure the resistance between the driver door lock control switch C505 pin 1, circuit 120 (PK/LG), harness side and ground; and between the driver door lock control switch C505 pin 5, circuit 119 (PK/YE), harness side and ground.
  
  Fig 3: Checking Door Lock Control Switch Circuits For Short To Ground - Circuits 120 & 119
  Courtesy of FORD MOTOR CO.
- If the passenger side door lock control switch is inoperative, measure the resistance between the passenger door lock control switch C605 pin 1, circuit 1297 (YE/RD), harness side and ground; and between the passenger door lock control switch C605 pin 5, circuit 1296 (OG/BK), harness side and ground.
  
  Fig 4: Checking Door Lock Control Switch Circuits For Short To Ground - Circuits 1297 & 1296
  Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10,000 ohms?
1. Yes : GO to A5.
2. No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
A5 CHECK THE SJB FOR CORRECT OPERATION
- Disconnect all SJB connectors.
- Check for:
  - Corrosion
  - Pushed-out pins
- Connect all SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
1. Yes : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . CLEAR the DTCs. REPEAT the self-test.
2. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.