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Pinpoint Test A: The Vehicle Does Not Start With The IA Key In Certain Areas Of The Vehicle

  1. A1 CHECK THE IA KEY LOCATION 
    • Ignition ON.
    • Check the location of the IA  key. If it is placed in the far corners of the interior of the vehicle, move the IA  key out of these areas and attempt to start the vehicle.

    Does the vehicle start? 

    • Yes  : The system is operating correctly. INFORM the customer of the correct operation of the IA  feature.
    • No  : GO to A2  .
  2. A2 CHECK FOR ENVIRONMENTAL INTERFERENCE 
    • Check for the use of any charger or other wireless device that can cause interference with the IA  key. If any device is found, remove the device and attempt to start the vehicle.

    Does the vehicle start? 

    • Yes  : The system is operating correctly. INFORM the customer of the cause of the concern and the correct operation of the IA  feature.
    • No  : GO to A3  .
  3. A3 CHECK THE SUSPECT PASSIVE START ANTENNA 
    • Ignition OFF.
    • Disconnect: Suspect Passive Start Antenna.
    • Measure the resistance between the suspect passive start antenna pin 1, component side and suspect passive start antenna pin 2, component side.
      Fig 1: Checking Suspect Passive Start Antenna
      G06077594Courtesy of FORD MOTOR CO.

    Is the resistance between 0.3 and 0.6 ohms? 

    • Yes  : GO to A4  .
    • No  : INSTALL a new passive start antenna for the one in question.
  4. A4 CHECK THE PASSIVE START ANTENNA CIRCUITS FOR A SHORT TO VOLTAGE 
    • Disconnect: RFA  Module C2153A  .
    • Place an IA  key in the backup transceiver slot and press the start/stop switch to transition the ignition to RUN.
    • Measure the voltage between the suspect passive start antenna, harness side and ground as follows:
      Suspect Passive Start Antenna Connector-Pin Circuit
      Front C325-1  VPK05 (BN/GN)
      Front C325-2  RPK05 (YE/OG)
      Center C326-1  VPK06 (GY/VT)
      Center C326-2  RPK06 (BU/WH)
      Rear C4321-1  VPK08 (WH/OG)
      Rear C4321-2  RPK08 (BN/VT)
      Fig 2: Measuring Voltage Between Suspect Passive Start Antenna And Ground
      G06077595Courtesy of FORD MOTOR CO.

    Is any voltage present? 

    • Yes  : REPAIR the circuit in question.
    • No  : GO to A5  .
  5. A5 CHECK THE PASSIVE START ANTENNA CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between the suspect passive start antenna, harness side and ground as follows:
      Suspect Passive Start Antenna Connector-Pin Circuit
      Front C325-1  VPK05 (BN/GN)
      Front C325-2  RPK05 (YE/OG)
      Center C326-1  VPK06 (GY/VT)
      Center C326-2  RPK06 (BU/WH)
      Rear C4321-1  VPK08 (WH/OG)
      Rear C4321-2  RPK08 (BN/VT)
      Fig 3: Measuring Resistance Between Suspect Passive Start Antenna And Ground
      G06077596Courtesy of FORD MOTOR CO.

    Are the resistances greater than 10, 000 ohms? 

    • Yes  : GO to A6  .
    • No  : REPAIR the circuit in question.
  6. A6 CHECK THE PASSIVE START ANTENNA CIRCUITS FOR AN OPEN 
    • Measure the resistance between the suspect passive start antenna, harness side and the RFA  module, harness side as follows:
      Suspect Passive Start Antenna Connector-Pin Circuit RFA Module Connector-Pin
      Front C325-1  VPK05 (BN/GN) C2153A-1 
      Front C325-2  RPK05 (YE/OG) C2153A-2 
      Center C326-1  VPK06 (GY/VT) C2153A-3 
      Center C326-2  RPK06 (BU/WH) C2153A-4 
      Rear C4321-1  VPK08 (WH/OG) C2153A-5 
      Rear C4321-2  RPK08 (BN/VT) C2153A-14 
      Fig 4: Measuring Resistance Between Suspect Passive Start Antenna And RFA Module
      G08619178Courtesy of FORD MOTOR CO.

    Are the resistances less than 3 ohms? 

    • Yes  : GO to A7  .
    • No  : REPAIR the circuit in question.
  7. A7 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 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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