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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2171 (Handles, Locks, Latches And Entry Systems) >> Diagnosis And Testing >> Handles, Locks, Latches and Entry Systems >> Pinpoint Tests >> Pinpoint Test G: The Doors Do Not Lock/Unlock Using The Keyless Entry Keypad >> Pinpoint Test G: The Doors Do Not Lock/Unlock Using The Keyless Entry Keypad

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

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .
  1. G1 CHECK THE SJB KEYCODE PID 
    • Enter the following diagnostic mode on the scan tool: SJB  DataLogger.
    • Observe the SJB  PID (KEYCODE). Read and record the 5-digit factory set entry code.
    • Enter the 5-digit factory set entry code on the keyless entry keypad, then press the 3/4 button.
    • Do the doors unlock? 
    • Yes:  The system is operating as designed. INFORM the customer of the correct system operation.
    • No:  GO to G2  .
  2. G2 RETRIEVE THE RECORDED SJB DTCs FROM THE ON-DEMAND SELF-TEST 
    • Check for recorded SJB  DTCs from the on-demand self-test.
    • Is DTC B2A26 recorded? 
    • Yes:  GO to G3  .
    • No:  GO to  G5.
  3. G3 REPEAT THE SJB ON-DEMAND SELF-TEST 
    • Disconnect: Keyless Entry Keypad C500.
    • Clear the DTCs, then repeat the SJB  on-demand self-test.
    • Is DTC B2A26 recorded? 
    • Yes:  GO to G4  .
    • No:  INSTALL a new keyless entry keypad. REFER to KEYLESS ENTRY KEYPAD . TEST the system for normal operation.
  4. G4 CHECK THE KEYPAD INPUT CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: SJB  C2280c.
    • Measure the resistance between the keypad, harness side and ground as follows:
      RESISTANCE SPECIFICATION

      Connector-Pin Circuit
      C500-7 CPK29 (GY/BU)
      C500-5 CPK30 (VT/GN)
      C500-1 CPK31 (YE/GN)
      Fig 1: Measuring Resistance Between Keypad, Harness Side And Ground
      G06259723Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes:  GO to  G10.
    • No:  REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  5. G5 CHECK THE SJB KEY_PAD PID 
    • Enter the following diagnostic mode on the scan tool: SJB  DataLogger.
    • Press each keyless entry keypad button while observing the SJB  PID (KEY_PAD).
    • Does the PID display the correct values? 
    • Yes:  GO to  G10.
    • No:  GO to G6  .
  6. G6 CHECK THE KEYPAD GROUND CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: Negative Battery Cable.
    • Disconnect: Keyless Entry Keypad C500.
    • Measure the resistance between the keyless entry keypad C500-2, circuit GD133 (BK), harness side and ground.
      Fig 2: Measuring Resistance Between Keyless Entry Keypad C500-2, Circuit GD133 (BK), Harness Side And Ground
      G06259724Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to G7  .
    • No:  REPAIR the circuit. TEST the system for normal operation.
  7. G7 CHECK THE KEYLESS ENTRY KEYPAD 
    • Connect: Negative Battery Cable.
    • Connect a fused jumper wire between the keyless entry keypad harness side, while monitoring the SJB  PID (KEY_PAD) as follows:
      KEYLESS ENTRY KEYPAD CONNECTOR PIN REFERENCE

      Keyless Entry Keypad Connector-Pin/Circuit Keyless Entry Keypad Connector-Pin/Circuit SJB PID (KEY_PAD) Value
      C500-7 CPK29 (GY/BU) C500-2 GD133 (BK) 1/2
      C500-5 CPK30 (VT/GN) C500-2 GD133 (BK) 7/8
      C500-1 CPK31 (YE/GN) C500-2 GD133 (BK) 9/0
      Fig 3: Checking Keyless Entry Keypad
      G06259725Courtesy of FORD MOTOR CO.
    • Does the PID display the correct values? 
  8. G8 CHECK THE KEYPAD INPUT CIRCUITS FOR AN OPEN 
    • Disconnect: SJB  C2280c.
    • Measure the resistance between the SJB  , harness side and the keyless entry keypad, harness side as follows:
      RESISTANCE SPECIFICATION

      SJB Connector-Pin Circuit Keyless Entry Keypad Connector-Pin
      C2280c-5 CPK29 (GY/BU) C500-7
      C2280c-18 CPK30 (VT/GN) C500-5
      C2280c-6 CPK31 (YE/GN) C500-1
      Fig 4: Measuring Resistance Between SJB, Harness Side And Keyless Entry Keypad
      G06383664Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes:  GO to G9  .
    • No:  REPAIR the circuit in question. TEST the system for normal operation.
  9. G9 CHECK THE KEYPAD INPUT CIRCUITS FOR A SHORT TO EACH OTHER 
    • Measure the resistance between the keypad, harness side as follows:
      RESISTANCE SPECIFICATION

      Keypad Connector-Pin/Circuit Keypad Connector-Pin/Circuit
      C500-7 CPK29 (GY/BU) C500-5 CPK30 (VT/GN)
      C500-7 CPK29 (GY/BU) C500-1 CPK31 (YE/GN)
      C500-5 CPK30 (VT/GN) C500-1 CPK31 (YE/GN)
      Fig 5: Checking Keypad Input Circuits For A Short To Each Other
      G06400056Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes:  GO to G10  .
    • No:  REPAIR the circuit in question. TEST the system for normal operation.
  10. G10 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB  connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the SJB  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. The concern may have been caused by a loose or corroded connector.
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