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Pinpoint Test K: The Luggage Compartment/Liftgate IA Is Inoperative

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. K1 CHECK THE RKE OPERATION 
    • Press the unlock button on an IA key.
    • Does the driver door unlock? 
  2. K2 CHECK THE LUGGAGE COMPARTMENT LID/LIFTGATE LATCH RELEASE OPERATION 
    • Press the luggage compartment lid/liftgate release switch located on the luggage compartment lid/liftgate.
    • Does the luggage compartment lid/liftgate latch release? 
  3. K3 CHECK THE IA KEY 
  4. K4 CHECK THE RFA MODULE TRUNK/LIFTGATE RELEASE SWITCH (TR_UNLK_H_SW) PID 
    • Enter the following diagnostic mode on the scan tool: RFA DataLogger.
    • Press the external luggage compartment lid/liftgate release switch while monitoring the RFA module PID TR_UNLK_H_SW.
    • Does the PID indicate the switch is being pressed? 
      • Yes  : GO to  K6.
      • No  : GO to  K5.
  5. K5 CHECK THE LUGGAGE COMPARTMENT LID/LIFTGATE RELEASE SWITCH INPUT CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: RFA Module C3503B.
    • Disconnect: BCM C2280G.
    • Measure the resistance between the BCM C2280G-20, circuit CPL10 (GN/WH), harness side and the RFA module C3503B-9, circuit CPL10 (GN/WH), harness side.
      Fig 1: Measuring Resistance Between BCM C2280G-20, Circuit CPL10 (GN/WH) And RFA Module C3503B-9, Circuit CPL10 (GN/WH)
      G06938650Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes  : GO to  K9.
      • No  : REPAIR circuit CPL10 (GN/WH) for an open. TEST the system for normal operation.
  6. K6 CHECK THE LUGGAGE COMPARTMENT ANTENNA CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: RFA Module C3503E.
    • Disconnect: Luggage Compartment/Liftgate IA Antenna C4082.
    • Disconnect: Smart Keyless Entry Ignition Relay.
    • Connect a fused jumper wire between the smart keyless entry ignition relay pin 3, circuit SBP01 (RD), Central Junction Box (CJB) face side and the smart keyless entry ignition relay pin 5, circuit CDC32 (BN/YE), CJB face side.
      Fig 2: Connecting Fused Jumper Wire Between Smart Keyless Entry Ignition Relay Pin 3 And Smart Keyless Entry Ignition Relay Pin 5
      G06938462Courtesy of FORD MOTOR CO.
    • Measure the voltage between the luggage compartment/liftgate IA antenna C4082-1, circuit VPK07 (VT), harness side and ground, and between the luggage compartment/liftgate IA antenna C4082-2, circuit RPK07 (GN/OG), harness side and ground.
      Fig 3: Measuring Voltage Between Luggage Compartment/Liftgate IA Antenna C4082-1, Circuit VPK07 (VT), Harness Side And Ground
      G06077595Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
      • Yes  : REMOVE the jumper wire. INSTALL the smart keyless entry ignition relay. REPAIR the circuit in question for a short to voltage. CLEAR the DTCs. REPEAT the self-test.
      • No  : REMOVE the jumper wire. INSTALL the smart keyless entry ignition relay. GO to  K7.
  7. K7 CHECK THE LUGGAGE COMPARTMENT/LIFTGATE ANTENNA CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between the luggage compartment/liftgate IA antenna C4082-1, circuit VPK07 (VT), harness side and ground, and between the luggage compartment/liftgate IA antenna C4082-2, circuit RPK07 (GN/OG), harness side and ground.
      Fig 4: Measuring Resistance Between Luggage Compartment/Liftgate IA Antenna C4082-1, Circuit VPK07 (VT), Harness Side And Ground
      G06077596Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
      • Yes  : GO to  K8.
      • No  : REPAIR the circuit in question for a short to ground. CLEAR the DTCs. REPEAT the self-test.
  8. K8 CHECK THE ANTENNA CIRCUITS FOR AN OPEN 
    • Measure the resistance between the luggage compartment/liftgate antenna, harness side and the RFA module, harness side as follows:
      RFA Module Connector-Pin Luggage Compartment/Liftgate IA Antenna Connector-Pin Circuit
      C3503E-16 C4082-1 VPK07 (VT)
      C3503E-7 C4082-2 RPK07 (GN/OG)
      • Fig 5: Measuring Resistance Between Luggage Compartment/Liftgate Antenna, Harness Side And RFA Module, Harness Side
      G06938654Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
      • Yes  : INSTALL a new luggage compartment/liftgate IA antenna. REFER to Intelligent Access (IA) Antenna . CLEAR the DTCs. REPEAT the self-test. If the concern is still present, GO to  K9.
      • No  : REPAIR the circuit in question for an open. CLEAR the DTCs. REPEAT the self-test.
  9. K9 CHECK FOR CORRECT RFA MODULE OPERATION 
    • Disconnect all the RFA module connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the RFA 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 RFA 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.
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