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PINPOINT TEST S : The APIM Does Not Respond To The Scan Tool

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. REFER to Battery, Mounting and Cables

  1. S1 CHECK THE APIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

    • Ignition OFF.
    • Disconnect: APIM.
    • Ignition ON.
    • Measure:

      4.2-inch and 8-inch display 

      Positive Lead Measurement / Action Negative Lead
      C2383-1
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  S2.
    No  VERIFY the BCM fuse 9 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

  2. S2 CHECK THE APIM GROUND CIRCUITS FOR AN OPEN

    • Ignition OFF.
    • Disconnect: Negative Battery Cable.
    • Measure:

      4.2-inch display 

      Positive Lead Measurement / Action Negative Lead
      C2383-37
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2383-38
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

      8-inch display 

      Positive Lead Measurement / Action Negative Lead
      C2383-37
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  S3.
    No  REPAIR the circuit.

  3. S3 CHECK THE HS-CAN CIRCUITS BETWEEN THE APIM AND THE DLC FOR AN OPEN

    • Measure:

      4.2-inch and 8-inch display 

      Positive Lead Measurement / Action Negative Lead
      C2383-53
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C251-6
      C2383-54
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C251-14

    Are the resistances less than 3 ohms? 

    Yes  If the vehicle is equipped with an 8-inch touchscreen, GO to  S4. If the vehicle is not equipped with an 8-inch touchscreen, CONNECT the negative battery cable. GO to  S5.
    No  REPAIR the circuit in question.

  4. S4 CHECK THE MS-CAN CIRCUITS BETWEEN THE APIM AND THE DLC FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2383-16
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C251-3
      C2383-17
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C251-11

    Are the resistances less than 3 ohms? 

    Yes  CONNECT the negative battery cable. GO to  S5.
    No  REPAIR the circuit in question.

  5. S5 CHECK FOR CORRECT APIM OPERATION

    • Ignition OFF.
    • Disconnect and inspect the APIM connector and related in-line 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 APIM connector and related in-line connectors. Make sure they seat and latch correctly.
    • Operate the system and determine the concern is still present.

    Is the concern still present? 

    Yes  CHECK 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, Refer to APIM HARDWARE TESTING .
    No  The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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