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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 740 (Parking Aid System - F-150 & Mark LT) >> Diagnostic Tests >> Parking Aid >> Pinpoint Tests >> Pinpoint Test H: DTC C1920 - Status LED No. 1 Circuit Failure and DTC B2373 - LED No. 1 Circuit Short to Battery >> Pinpoint Test H: DTC C1920 - Status Led No. 1 Circuit Failure And DTC B2373 - Led No. 1 Circuit Short To Battery

Pinpoint Test H: DTC C1920 - Status Led No. 1 Circuit Failure And DTC B2373 - Led No. 1 Circuit Short To Battery

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. H1 CHECK THE DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PARKING AID MODULE SELF-TESTS 
    • Check the parking aid module DTCs from the continuous and on-demand self-tests.
    • Is DTC C1920 present? 
    1. YES  : Go to  H2 .
    2. NO  : For DTC B2373, go to  H4 .

      For all other DTCs, REFER to the Parking Aid Module Diagnostic Trouble Code (DTC) Index in this article.

  2. H2 CHECK CIRCUIT 1436 (VT/OG) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Parking Aid Switch C2035
    • Disconnect: Parking Aid Module C2023
    • Measure the resistance between the parking aid module C2023-5, circuit 1436 (VT/OG), harness side and ground.
      • Fig 1: Checking Circuit 1436 (VT/OG) For Short To Ground
      GF0004514Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  H3.
    2. 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 C2023-5, circuit 1436 (VT/OG), harness side and the parking aid switch C2035-6, circuit 1436 (VT/OG), harness side.
      • Fig 2: Checking Circuit 1436 (VT/OG) For Open
      GF0004515Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  H5.
    2. 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 C2023-5, circuit 1436 (VT/OG), harness side and ground.
      • Fig 3: Measuring Voltage Between Parking Aid Module C2023-5, Circuit 1436 Harness Side And Ground
      GF0004516Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. YES  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  H5.
  5. H5 CHECK THE PARKING AID SWITCH 
    • Install a known good parking aid switch.
    • Test the system for normal operation.
    • Is the concern still present? 
    1. YES  : Go to  H6.
    2. NO  : INSTALL a new parking aid switch. REFER to Parking Aid Switch  in this article. 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
      • damaged pins
      • 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? 
    1. YES  : INSTALL a new parking aid module. REFER to Parking Aid Module  in this article. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the scan tool data link test.
    2. 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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