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Pinpoint Test B: The Doors Do Not Lock/Unlock Using The Remote Keyless Entry (RKE) Keypad

  1. B1 CHECK THE VEHICLE SECURITY MODULE 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? 
    • Yes  : GO to B5.
    • No  : GO to B2.
  2. B2 CHECK CIRCUITS 121 (YE/BK), 122 (YE) AND 123 (RD) FOR RESISTANCE TO GROUND 
    • Key in OFF position.
    • Disconnect: Vehicle Security Module C2113c.
    • Using the following table, measure the resistance between the vehicle security module C2113c, harness side and ground:
      CIRCUITS 121 (YE/BK), 122 (YE) AND 123 (RD) INSPECTION

      Vehicle Security Module C2113c Circuit
      pin 2 121 (YE/BK)
      pin 3 123 (RD)
      pin 9 122 (YE)
      Fig 1: Measuring Resistance Between Connector Terminals And Ground
      G03911770Courtesy of FORD MOTOR CO.
    • Is any resistance less than 10,000 ohms? 
    • Yes  : GO to B3.
    • No  : GO to B4.
  3. B3 CHECK CIRCUITS 121 (YE/BK), 122 (YE) AND 123 (RD) FOR A SHORT TO GROUND 
    • Disconnect: RKE Keypad C500.
    • Using the following table, measure the resistance between the vehicle security module C2113c harness side and ground:
      CIRCUITS 121 (YE/BK), 122 (YE) AND 123 (RD) INSPECTION

      Vehicle Security Module C2113c Circuit
      pin 2 121 (YE/BK)
      pin 3 123 (RD)
      pin 9 122 (YE)
      Fig 2: Measuring Resistance Between Connector Terminals And Ground
      G03911770Courtesy of FORD MOTOR CO.
    • Is any resistance less than 10,000 ohms? 
    • Yes  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.
    • No  : INSTALL a new RKE keypad. REFER to REMOTE KEYLESS ENTRY KEYPAD  in this article. CLEAR the DTCs. REPEAT the self-test.
  4. B4 CHECK CIRCUITS 121 (YE/BK), 122 (YE), 123 (RD) AND 124 (BR) FOR AN OPEN 
    • Disconnect: RKE Keypad C500.
    • Using the following table, measure the resistance between the vehicle security module C2113c, harness side and RKE keypad C500, harness side:
      CIRCUITS 121 (YE/BK), 122 (YE), 123 (RD) AND 124 (BR) INSPECTION

      Vehicle Security Module C2113c Circuit RKE Keypad C500
      pin 2 121 (YE/BK)/ 78 (LB/YE) pin 1
      pin 3 123 (RD)/ 121 (YE/BK) pin 7
      pin 4 124 (BN) pin 6
      pin 9 122 (YE)/ 79 (LG/RD) pin 3
      Fig 3: Checking Circuits 121 (YE/BK), 122 (YE), 123 (RD) And 124 (BR) For Open
      G03925925Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes  : INSTALL a new RKE keypad. REFER to REMOTE KEYLESS ENTRY KEYPAD  in this article. CLEAR the DTCs. REPEAT the self-test.
    • No  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.
  5. B5 CHECK FOR CORRECT VEHICLE SECURITY MODULE OPERATION 
    • Disconnect all the vehicle security module connectors.
    • Check for:
      • corrosion
      • 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 . CLEAR the DTCs. REPEAT the self-test.
    • 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.
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