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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1376 (Exterior Lighting System) >> Diagnosis And Testing >> Adaptive Headlighting >> Pinpoint Tests >> Pinpoint Test AH: DTC U3003:16 >> Pinpoint Test Ah: DTC U3003:16

Pinpoint Test Ah: DTC U3003:16

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY DISCONNECT .
  1. AH1 RECHECK THE HCM DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: HCM Self-Test.
    • Clear the DTCs. Repeat the HCM self-test.
    • Is DTC U3003:16 still present? 
    • Yes:  GO to  AH2.
    • No:  The system is operating correctly at this time. The DTC may have been set due to a previous low battery voltage condition.
  2. AH2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM 
    • Enter the following diagnostic mode on the scan tool: PCM Self-Test.
    • Carry out the PCM Key ON Engine OFF (KOEO) self-test.
    • Retrieve the continuous memory DTCs from all modules.
    • Is DTC P0620, P0622, P0625, P0626 or P065B set in the PCM? 
  3. AH3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE 
  4. AH4 CHECK THE HCM VOLTAGE SUPPLY 
    • Ignition OFF.
    • Disconnect: HCM C1600.
    • Ignition ON.
    • Measure and record the voltage at the battery.
    • Measure the voltage between the HCM C1600-10, circuit CBP42 (GN), harness side and ground.
      Fig 1: Measuring Voltage Between HCM C1600-10 & Ground
      G06257412Courtesy of FORD MOTOR CO.
    • Is the voltage within 0.2 volt of the recorded battery voltage? 
    • Yes:  GO to  AH5.
    • No:  REPAIR the circuit for high resistance. CLEAR the DTC. REPEAT the self-test.
  5. AH5 CHECK THE HCM GROUND CIRCUIT 
    • Ignition OFF.
    • Disconnect: Negative Battery Cable.
    • Measure the resistance between the HCM C1600-3, circuit GD121 (BK/YE), harness side and ground.
      Fig 2: Measuring Resistance Between HCM C1600-3 & Ground
      G06257413Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  INSTALL a new HCM. REFER to Removal and Installation . TEST the system for normal operation.
    • No:  REPAIR the circuit for high resistance. CLEAR the DTCs. REPEAT the self-test.
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