Pinpoint Test I: The Illuminated Entry is Inoperative: 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.

I1 CHECK CIRCUIT 53 (BK/LB) FOR AN OPEN
- Key in OFF position.
- Disconnect: Smart Junction Box C2280e.
- Disconnect: Overhead Console (w/o roof opening panel) C929 or (with roof opening panel) C930.
- Measure the resistance between SJB C2280e-7, circuit 53 (BK/LB) and:
  - overhead console (with roof opening panel) C930-7, circuit 53 (BK/LB).
  - overhead console (without roof opening panel) C929-3, circuit 53 (BK/LB).
    
    Fig 1: Measuring Resistance Between SJB C2280E-7, Circuit 53 (BK/Lb)
    Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to I2.
- No : REPAIR circuit 53 (BK/LB) for an open. TEST the system for normal operation.
I2 CHECK THE VEHICLE EQUIPMENT
- Check to see if the vehicle is equipped with remote keyless entry (RKE) and keyless entry keypad.
- Is the vehicle equipped with remote keyless entry (RKE) and keyless entry keypad?
- Yes : GO to I3.
- No : GO to I5.
I3 CHECK THE RKE TRANSMITTER
- Using the RKE transmitter, lock and unlock the doors.
- Do the doors lock and unlock?
- Yes : GO to I4.
- No : REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS to continue diagnosis of the RKE system.
I4 CHECK THE KEYLESS ENTRY KEYPAD
- Using the keyless entry keypad, lock and unlock the doors.
- Do the doors lock and unlock?
- Yes : GO to I5.
- No : REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS to continue diagnosis of the keyless entry keypad system.
I5 CHECK SJB PINS AND CONNECTORS
- Disconnect all SJB module connectors. Check for:
  - corrosion
  - pushed-out pins
- Connect all SJB module 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. Concern may have been caused by a loose or corroded connector.