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Pinpoint Test O: The Trailer Camera Is Inoperative

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  1. NOTE: Before disconnecting the camera or trailer electrical connections, verify that the connectors are properly seated and latched.

    Refer to PARKING AID for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Parking Aid - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    IPMA B152F:12 Base Camera: Circuit Short To Battery A continuous and on-demand DTC that sets in the IPMA when there is a circuit shorted to battery on the trailer camera wiring.

    Possible Sources 

    • Fuse
    • Wiring, terminals or connectors
    • Communication network concern
    • Camera
    • TR input concern
    • IPMA

    Visual Inspection and Pre-checks 

    • BJB fuse 25 (10A).
    • Verify the tailgate is fully closed.
    • Verify the trailer electrical connection is properly seated and latched.

  2. O1 CHECK AND CLEAN THE CAMERA LENS

    • Clean and make sure the affected camera lens is clear of any debris.

    • Ignition ON.

    • Test the parking aid camera system and monitor the video images.

    Is the concern still present? 

    Yes  GO to  O2
    No  The system is operating correctly at this time. The concern may have been caused by dirt or debris on the camera lens.

  3. O2 CHECK FOR CORRECT GEAR INPUT AT THE IPC (INSTRUMENT PANEL CLUSTER)

    • While monitoring the IPC PRNDL indicator, briefly select each gear in the entire range.

    Does the IPC PRNDL indicator match the actual gear selection? 

    Yes  GO to  O3
    No  DIAGNOSE the PRNDL indicator. REFER to: Instrumentation, Message Center and Warning Chimes .

  4. O3 PERFORM A NETWORK TEST

    • Using a diagnostic scan tool, perform a network test.

    Do all modules pass the network test? 

    Yes  GO to  O4
    No  See the Symptom Chart: Communication Network. REFER to: ETHERNET MODULE COMMUNICATIONS NETWORK .

  5. O4 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE IPMA (IMAGE PROCESSING MODULE A) SELF-TEST

    • Using the diagnostic scan tool, perform the IPMA self-test.

    Are any Diagnostic Trouble Codes (DTCs) retrieved? 

    Yes  REFER to the IPMA DTC Chart in Diagnostic Trouble Code (DTC) Chart .
    No  GO to  O5

  6. O5 CHECK FOR VOLTAGE AT THE TRAILER CAMERA

    • Ignition OFF.

    • Disconnect Trailer tow connector C439.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C439-1
      GFD560558Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  O6
    No  INSPECT BJB fuse 25 (10A). If the fuse is OK, repair the circuit for an open. If the fuse is not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the short circuit.

  7. O6 CHECK FOR GROUND AT THE TRAILER CAMERA

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C439-1
      GFD560558Courtesy of FORD MOTOR COMPANY
      		 C439-8

    Is the voltage greater than 11 volts? 

    Yes  GO to  O8
    No  GO to  O7

  8. O7 CHECK THE TRAILER CAMERA GROUND/SHIELD CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect IPMA C242C.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C242C-18
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C439-8

    Is the resistance less than 3 ohms? 

    Yes  GO to  O14
    No  REPAIR the circuit.

  9. O8 CHECK THE VIDEO SIGNAL CIRCUITS BETWEEN THE TRAILER TOW CONNECTOR AND IPMA (IMAGE PROCESSING MODULE A) FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect IPMA C242C.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C439-9
      GFD560558Courtesy of FORD MOTOR COMPANY
      		 Ground
      C439-10
      GFD560558Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit in question.
    No  GO to  O9

  10. O9 CHECK THE VIDEO SIGNAL CIRCUITS BETWEEN THE TRAILER CAMERA AND IPMA (IMAGE PROCESSING MODULE A) FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C439-9
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 Ground
      C439-10
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  O10
    No  REPAIR the circuit in question.

  11. O10 CHECK THE VIDEO SIGNAL CIRCUITS BETWEEN THE TRAILER TOW CONNECTOR AND IPMA (IMAGE PROCESSING MODULE A) FOR A SHORT TO THE VIDEO SHIELD

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C439-9
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C439-8
      C439-10
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C439-8

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  O11
    No  REPAIR the circuit in question.

  12. O11 CHECK VIDEO SIGNAL CIRCUITS BETWEEN THE TRAILER TOW CONNECTOR AND IPMA (IMAGE PROCESSING MODULE A) FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C242C-9
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C439-9
      C242C-8
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C439-10

    Are the resistances less than 3 ohms? 

    Yes  GO to  O12
    No  REPAIR the circuit in question.

  13. O12 CHECK THE TRAILER HARNESS PARKING AID CAMERA HARNESS

    • Inspect the trailer harness between C439 and the trailer parking aid camera for:

      • open or short circuits
      • damaged or pushed out pins
      • corrosion

    Is the harness OK? 

    Yes  GO to  O13
    No  REPAIR the harness.

  14. O13 CHECK FOR CORRECT TRAILER CAMERA OPERATION

    • Ignition OFF.

    • Disconnect and inspect the trailer camera connector.

    • 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 trailer camera connector. Make sure it seats and latches correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new trailer camera.If the concern is still present after camera replacement, GO to  O14
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

  15. O14 CHECK FOR CORRECT IPMA (IMAGE PROCESSING MODULE A) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the IPMA.

    • 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 IPMA. 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 OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPMA. REFER to: Image Processing Module A (IPMA) .
    No  The system is operating correctly at this time. The 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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