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Home >> Ford >> 2015 >> Explorer Limited, 3.5L Eng VIN 8, AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control - DATC >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test H : U3003:16, U3003:17 >> Pinpoint Test H : U3003:16, U3003:17

Pinpoint Test H : U3003:16, U3003:17

  1. H1 CLEAR DTCs

    • Ignition ON.
    • Using a diagnostic scan tool, clear all DTCs.
    • Using a diagnostic scan tool, perform a HVAC module self-test.

    Is DTC U3003:16 or U3003:17 present? 

    Yes  GO to  H2.
    No  The system is operating normally at this time. The DTC may have been set due to a previous battery condition.

  2. H2 RETRIEVE PCM DTCs

    • Start the engine.
    • Using a diagnostic scan tool, perform PCM self-test.

    Are any charging system DTCs present in the PCM ? 

    Yes  REFER to Charging System , Symptom Chart: Charging System for diagnosis of the battery and charging system.
    No  GO to  H3.

  3. H3 CHECK BATTERY CONDITION

    • Ignition OFF.

    Does the battery pass the condition test? 

    Yes  GO to  H4.
    No  INSTALL a new battery. REFER to Battery, Mounting and Cables .

  4. H4 CHECK THE CHARGING SYSTEM VOLTAGE

    • Start the engine.
    • Measure the voltage of the battery:
      • For DTC U3003:17, turn off all accessories and run the engine at 1, 500 Revolutions Per Minute (RPM) for a minimum of 2 minutes.
      • For DTC U3003:16, turn on headlights and HVAC fan on high and run engine at 1, 500 Revolutions Per Minute (RPM) for a minimum of 2 minutes.

    Is the battery voltage between 13-15.2 volts? 

    Yes  For DTC U3003:16, GO to  H5. For DTC U3003:17, GO to  H7.
    No  REFER to Charging System , Symptom Chart: Charging System to diagnose the charging system.

  5. H5 CHECK THE HVAC MODULE VOLTAGE SUPPLY CIRCUIT FOR HIGH RESISTANCE

    • Ignition OFF.
    • Measure and record the voltage at the battery.
    • Disconnect: HVAC Module C228A.
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C228A-26
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage within 0.2 volt of the recorded battery voltage? 

    Yes  GO to  H6.
    No  REPAIR the circuit.

  6. H6 CHECK THE HVAC MODULE GROUND CIRCUIT FOR HIGH RESISTANCE

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C228A-10
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  H7.
    No  REPAIR the circuit.

  7. H7 CHECK FOR CORRECT HVAC MODULE OPERATION

    • Ignition OFF.
    • Disconnect and inspect all HVAC module connectors.
    • 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 HVAC module connectors. 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new HVAC module. REFER to Climate Control - EMTC .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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