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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 Ai : B1A69:11, B1A69:15 >> Pinpoint Test Ai : B1A69:11, B1A69:15

Pinpoint Test Ai : B1A69:11, B1A69:15

  1. AI1 CHECK FOR HVAC MODULE DTCs

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

    Are DTCs C1B14:11 or C1B14:12 present? 

    Yes  GO to Pinpoint Test C .
    No  GO to  AI2.

  2. AI2 CHECK FOR VOLTAGE TO THE IN-VEHICLE TEMPERATURE AND HUMIDITY SENSOR

    • Ignition OFF.
    • Disconnect: In-Vehicle Temperature and Humidity Sensor.
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2247-3
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage between 4.7 and 5 volts? 

    Yes  For DTC B1A69:11, GO to  AI3. For DTC B1A69:15, GO to  AI4.
    No  REPAIR the circuit.

  3. AI3 CHECK THE HUMIDITY SIGNAL CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Disconnect: HVAC Module C228A
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2247-4
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AI6.
    No  REPAIR the circuit.

  4. AI4 CHECK THE HUMIDITY SIGNAL CIRCUIT FOR AN OPEN CIRCUIT

    • Ignition OFF.
    • Disconnect: HVAC Module C228B.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2247-4
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C228B-18

    Is the resistance less than 3 ohms? 

    Yes  GO to  AI5.
    No  REPAIR the circuit.

  5. AI5 CHECK THE HUMIDITY SIGNAL CIRCUIT FOR A SHORT TO POWER

    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2247-4
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  AI6.

  6. AI6 ISOLATE THE IN-VEHICLE TEMPERATURE AND HUMIDITY SENSOR

    • Ignition OFF.
    • Connect: HVAC Module C228A.
    • Connect: HVAC Module C228B.
    • Ignition ON.
    • Using a diagnostic scan tool, perform a HVAC module self-test.

    Does the DTC return? 

    Yes  GO to  AI7.
    No  The cause of the concern was an inoperative in-vehicle temperature and humidity sensor.

  7. AI7 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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