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Pinpoint Test BE: C1920, B2373 Led No. 1 Circuit Failure

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
  1. BE1 USE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PARKING AID MODULE SELF-TEST 
    • Use the recorded results from the parking aid module self-test.
    • Are any DTCs recorded? 

    Yes 

    For DTC C1920 or B2373, GO to BE2.

    All others, go to the PARKING AID MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

    No 

    Go To PINPOINT TEST AY: PARKING AID IS INOPERATIVE .

  2. BE2 CHECK CIRCUIT 1436 (VT/OG) FOR SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Parking Aid Disable Switch C2114.
    • Disconnect: Parking Aid Module. Measure the resistance between the parking aid module C4226-5, circuit 1436 (VT/OG), harness side and ground; or between the parking aid module C4014-19, circuit 1436 (VT/OG), harness side and ground.
      • Fig 1: Checking Circuit 1436 (VT/OG) For Short To Ground
      G03245819Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes 

    GO to BE3

    No 

    REPAIR the circuit. TEST the system for normal operation.

  3. BE3 CHECK CIRCUIT 1436 (VT/OG) FOR AN OPEN 
    • Measure the resistance between the parking aid module C4226-5, circuit 1436 (VT/OG), harness side and the parking aid disable switch C2114-6, circuit 1436 (VT/OG), harness side; or between the parking aid module C4014-19, circuit 1436 (VT/OG), harness side and the parking aid disable switch C2114-6, circuit 1436 (VT/OG), harness side.
      • Fig 2: Checking Circuit 1436 (VT/OG) For An Open
      G03245820Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes 

    GO to BE4

    No 

    REPAIR the circuit. TEST the system for normal operation.

  4. BE4 CHECK CIRCUIT 1436 (VT/OG) FOR A SHORT TO POWER 
    • Measure the voltage between the parking aid module C4226-5, circuit 1436 (VT/OG), harness side and ground; or between the parking aid module C4014-19, circuit 1436 (VT/OG), harness side and ground.
      • Fig 3: Checking Circuit 1436 (VT/OG) For A Short To Power
      G03245821Courtesy of FORD MOTOR CO.
    • Is there any voltage present? 

    Yes 

    REPAIR the circuit. TEST the system for normal operation.

    No 

    GO to BE5.

  5. BE5 CHECK THE TRACTION ASSIST/PARKING AID DISABLE SWITCH 
    • Install a known good traction assist/parking aid disable switch.
    • Test the system for normal operation.
    • Is the concern still present? 

    Yes 

    GO to BE6

    No 

    INSTALL a new traction assist/parking aid disable switch. Refer to ANTI-LOCK CONTROL . TEST the system for normal operation.

  6. BE6 CHECK FOR CORRECT PARKING AID OPERATION 
    • Disconnect all the parking aid module connectors.
    • Check for:
      • Corrosion
      • pushed-out pins
    • Connect all the parking aid 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 parking aid module. Refer to PARKING AID MODULE . CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.

    No 

    The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

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