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

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Test Step

J1 CHECK THE REMOTE KEYLESS ENTRY (RKE) KEYPAD SWITCH PIDS
- Enter the following diagnostic mode on the diagnostic 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?
Result / Action to Take
- 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 diagnostic 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 pin 5, circuit 57 (BK), harness side and ground.
  
  Fig 1: Measuring Resistance Between RKE Keypad C500 Pin 5 Harness Side And Ground
  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 pin 2, circuit 1013 (BN/LG), harness side and the vehicle security module C2113c pin 6, circuit 66 (LB), harness side.
  
  Fig 2: Measuring Resistance Between RKE Keypad C500 Pin 2 And Vehicle Security Module C2113C Pin 6
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new RKE keypad. REFER to REMOTE KEYLESS ENTRY KEYPAD in this article. 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.