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Pinpoint Test H: DTC C1920 and B2373 LED No. 1 Circuit Failure: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
  1. H1 RETRIEVE THE RECORDED DTC FROM BOTH THE CONTINUOUS AND ON-DEMAND PARKING AID MODULE SELF-TESTS 
    • Retrieve the recorded parking aid module DTCs from the continuous and on-demand self-tests.
    • Are any DTCs recorded? 
  2. H2 CHECK CIRCUIT 1436 (VT/OG) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Parking Aid Switch C2114.
    • Disconnect: Parking Aid Module C3267.
    • Measure the resistance between the parking aid module C3267-5, circuit 1436 (VT/OG), harness side and ground.
      Fig 1: Checking Circuit 1436 (VT/OG) For Short To Ground
      G03902673Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to H3.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  3. H3 CHECK CIRCUIT 1436 (VT/OG) FOR AN OPEN 
    • Measure the resistance between the parking aid module C3267-5, circuit 1436 (VT/OG), harness side and the parking aid switch C2114-9, circuit 1436 (VT/OG), harness side.
      Fig 2: Checking Circuit 1436 (VT/OG) For Open
      G03992642Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to H4.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  4. H4 CHECK CIRCUIT 1436 (VT/OG) FOR A SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between the parking aid module C3267-5, circuit 1436 (VT/OG), harness side and ground.
      Fig 3: Checking Circuit 1436 (VT/OG) For Short To Voltage
      G03902675Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
    • No  : GO to H5.
  5. H5 CHECK THE PARKING AID SWITCH 
    • Install a known good traction assist/parking aid switch.
    • Test the system for normal operation.
    • Is the concern still present? 
    • Yes  : GO to H6.
    • No  : INSTALL a new parking aid switch. REFER to PARKING AID SWITCH . CLEAR the DTCs. REPEAT the self-test.
  6. H6 CHECK FOR CORRECT PARKING AID MODULE OPERATION 
    • Disconnect the parking aid module connector.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect the parking aid module connector and make sure it seats correctly.
    • Operate the system and determine if 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. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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