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Pinpoint Test Ai : The Doors Do Not Lock/Unlock Using The Keyless Entry Keypad

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. AI1 CHECK POWER LOCK OPERATION FROM THE DOOR LOCK CONTROL SWITCH

    • Press the lock and unlock button on the door lock control switch.

    Do the doors lock and unlock? 

    Yes  GO to  AI2.
    No  GO to Pinpoint Test AD .

  2. AI2 CHECK FOR RFA MODULE DTC B121B:11

    • Ignition ON.
    • Using a diagnostic scan tool, carry out the RFA module self-test.

    Is DTC B121B:11 present? 

    Yes  GO to  AI3.
    No  GO to  AI5.

  3. AI3 ISOLATE THE KEYLESS ENTRY KEYPAD

    • Ignition OFF.
    • Disconnect: Keyless Entry Keypad C500 .
    • Ignition ON.
    • Using a diagnostic scan tool, clear the RFA module DTCs.
    • Using a diagnostic scan tool, carry out the RFA module self-test.

    Is DTC B121B:11 still present? 

    Yes  GO to  AI4.
    No  INSTALL a new keyless entry keypad. REFER to Keyless Entry Keypad .

  4. AI4 CHECK THE KEYLESS ENTRY KEYPAD INPUT CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.
    • Disconnect: RFA Module C4392B .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C500-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C500-3
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C500-6
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  AI10.
    No  REPAIR the circuit in question.

  5. AI5 CHECK THE BCM KEYPAD CODE

    • Using a diagnostic scan tool, view the factory keyless entry code.
    • Enter the 5-digit factory set entry code on the keyless entry keypad, then press the 3/4 button.
    • Simultaneously press the 7/8 and 9/0 buttons for 3 seconds.

    Do the doors unlock when the factory code is entered and lock when the 7/8 and 9/0 buttons are pressed? 

    Yes  The system is operating as designed. INFORM the customer of the correct system operation.
    No  GO to  AI6.

  6. AI6 CHECK THE KEYLESS ENTRY KEYPAD PIDs

    • Using a diagnostic scan tool, view the RFA module PIDs.
    • Press each keyless entry keypad button while observing the following BCM PIDs :
      • Key Pad 1_2 Switch Status (Keypd_SW_1_2)
      • Key Pad 3_4 Switch Status (Keypd_SW_3/4)
      • Key Pad 5_6 Switch Status (Keypd_SW_5/6)
      • Key Pad 7_8 Switch Status (Keypd_SW_7/8)
      • Key Pad 9_0 Switch Status (Keypd_SW_9/0)

    Do all of the PIDs indicate the buttons operate correctly? 

    Yes  GO to  AI11.
    No  GO to  AI7.

  7. AI7 CHECK THE KEYLESS ENTRY KEYPAD GROUND CIRCUIT FOR AN OPEN

    • Ignition OFF.
    • Disconnect: Keyless Entry Keypad C500 .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C500-5
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  AI8.
    No  REPAIR the circuit.

  8. AI8 BYPASS THE KEYLESS ENTRY KEYPAD

    • Ignition ON.
    • Using a diagnostic scan tool, view the RFA module PIDs.
    • Using a diagnostic scan tool, monitor the following RFA module PIDs :
      • Key Pad 1_2 Switch Status (Keypd_SW_1_2)
      • Key Pad 7_8 Switch Status (Keypd_SW_7/8)
      • Key Pad 9_0 Switch Status (Keypd_SW_9/0)
    • Connect:

      Keypad Button 1/2 

      Lead 1 Measurement / Action Lead 2
      C500-1
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C500-5
    • Remove the fused jumper wire.
    • Connect:

      Keypad Button 7/8 

      Lead 1 Measurement / Action Lead 2
      C500-3
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C500-5
    • Remove the fused jumper wire.
    • NOTE: Keypad button 9/0

      Connect:

      Keypad Button 9/0 

      Lead 1 Measurement / Action Lead 2
      C500-6
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C500-5
    • Remove the fused jumper wire.

    Do the PIDs indicate correctly when the jumper wire is connected? 

    Yes  INSTALL a new keyless entry keypad. REFER to Keyless Entry Keypad .
    No  GO to  AI9.

  9. AI9 CHECK THE KEYLESS ENTRY KEYPAD INPUT CIRCUITS FOR AN OPEN

    • Ignition OFF.
    • Disconnect: RFA Module C4392B .

    Are the resistances less than 3 ohms? 

    Yes  GO to  AI10.
    No  REPAIR the circuit in question.

  10. AI10 CHECK THE KEYLESS ENTRY KEYPAD INPUT CIRCUITS FOR A SHORT TO EACH OTHER

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C500-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C500-3
      C500-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C500-6
      C500-3
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C500-6

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  AI11.
    No  REPAIR the circuits in question.

  11. AI11 CHECK FOR CORRECT RFA MODULE OPERATION

    • Disconnect and inspect all the RFA module connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the RFA module connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK On-Line Automotive Service Information System(OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new RFA module. REFER to Multifunction Electronic Modules .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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