Pinpoint Test J: The Remote Keyless Entry Keypad Illumination Is Inoperative

WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

J1 CHECK THE REMOTE KEYLESS ENTRY (RKE) KEYPAD SWITCH PIDS
- Enter the following diagnostic mode on the scan tool: Vehicle Security Module KEYPAD PIDS.
- Press each RKE keypad button while viewing vehicle security module KEYPAD PIDS.
- Do the PID values agree with the RKE keypad button positions?
Yes : GO to J2.

No : GO to PINPOINT TEST F .
J2 CHECK THE VEHICLE SECURITY MODULE OUTPUT FUNCTION
- Enter the following diagnostic mode on the scan tool: Vehicle Security Module Active Commands.
- Activate the RKE keypad backlighting on and off active commands.
- Trigger LIGHT ON then OFF.
- Does the RKE keypad backlighting turn on for 2 seconds as commanded?
Yes : GO to J5.

No : GO to J3.
J3 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Disconnect: RKE Keypad C500.
- Measure the resistance between the RKE keypad C500-5, circuit 57 (BK), harness side and ground.
  
  Fig 1: Checking Circuit 57 (BK) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to J4.

No : REPAIR the circuit. TEST the system for normal operation.
J4 CHECK CIRCUIT 66 (LB) FOR AN OPEN
- Disconnect: Vehicle Security Module C2113c.
- Measure the resistance between the RKE keypad C500-2, circuit 1013 (BN/LG), harness side and the vehicle security module C2113c-6, circuit 66 (LB), harness side.
  
  Fig 2: Checking Circuit 66 (LB) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new RKE keypad. REFER to REMOTE KEYLESS ENTRY KEYPAD . TEST the system for normal operation.

No : REPAIR the circuit. TEST the system for normal operation.
J5 CHECK FOR CORRECT VEHICLE SECURITY MODULE OPERATION
- Key in OFF position.
- Disconnect all the vehicle security module connectors.
- Check for:
  - for corrosion
  - for pushed-out pins
- Connect all the vehicle security 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 vehicle security module. 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. TEST the system for normal operation.