Pinpoint Test A: The Alarm System Does Not Disarm - Using The Driver Door Disarm Switch: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK THE SMART JUNCTION BOX (SJB) DTCs
- Use the recorded results from the SJB self-test.
- Is DTC B2116 retrieved?
- Yes : GO to PINPOINT TEST C .
- No : GO to A2.
A2 CHECK THE DRIVER DOOR DISARM SWITCH OPERATION
- Key in OFF position.
- Disconnect: Smart Junction Box (SJB) C2280c.
- Insert the key in the driver door lock cylinder.
- Turn the key cylinder to UNLOCK.
- Measure the resistance between the SJB C2280c-4, circuit 1313 (LB/BK), harness side and ground.
  
  Fig 1: Measuring Resistance Between SJB C2280C-4, Circuit 1313 (LB/BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to A5.
- No : GO to A3.
A3 CHECK CIRCUIT 1313 (LB/BK) FOR AN OPEN
- Disconnect: Driver Door Disarm Switch C509.
- Measure the resistance between the SJB C2280c-4, circuit 1313 (LB/BK), harness side and the driver door disarm switch C509-1, circuit 1313 (LB/BK).
  
  Fig 2: Measuring Resistance Between SJB C2280C-4, Circuit 1313 (LB/BK), Harness Side And Driver Door Disarm Switch C509-1, Circuit 1313 (LB/BK)
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to A4.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
A4 CHECK CIRCUIT 1205 (BK) FOR AN OPEN TO THE DRIVER DOOR DISARM SWITCH
- Connect: SJB C2280c.
- Measure the resistance between the driver door disarm switch C509-2, circuit 1205 (BK), harness side and ground.
  
  Fig 3: Measuring Resistance Between Driver Door Disarm Switch C509-2, Circuit 1205 (BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new driver door disarm switch. REFER to DOOR DISARM SWITCH . CLEAR the DTCs. REPEAT the self-test.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
A5 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - 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. CLEAR the DTCs. REPEAT the self-test.