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Home >> Ford >> 2018 >> Focus SEL, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Climate Control System - General Information And Diagnostics) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test F : B1A63:11, B1A63:15, B1A64:11, B1A64:15 >> Pinpoint Test F : B1A63:11, B1A63:15, B1A64:11, B1A64:15

Pinpoint Test F : B1A63:11, B1A63:15, B1A64:11, B1A64:15

WARNING: This page is about a different car, the 2016 Ford Expedition. 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 cause damage to the connector.

  1. F1 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: Sunload sensor C286.
    • Disconnect: BCM C2280B.
    • Disconnect: HVAC control module - EATC C228B.
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C286-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C286-2
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C286-3
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit in question.
    No  GO to  F2.

  2. F2 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C286-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C286-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C286-3
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  F3.
    No  REPAIR the circuit in question.

  3. F3 CHECK THE SUNLOAD SENSOR CIRCUITS FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C286-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C228B-22
      C286-3
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C228B-23
      Positive Lead Measurement / Action Negative Lead
      C286-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C2280B-30
      Positive Lead Measurement / Action Negative Lead
      C286-4
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances less than 3 ohms? 

    Yes  GO to  F4.
    No  REPAIR the circuits in question.

  4. F4 CHECK THE IN-VEHICLE TEMPERATURE AND HUMIDITY SENSOR CIRCUITS FOR A SHORT TOGETHER

    Are the resistances greater than 10, 000 ohms? 

    Yes  INSTALL a new sunload sensor. REFER to Climate Control . TEST the system for normal operation. If the concern is still present, GO to  F5.
    No  REPAIR the circuits in question.

  5. F5 CHECK FOR CORRECT HVAC CONTROL MODULE OPERATION

    • Disconnect and inspect all HVAC control 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 all HVAC control module connectors. Make sure they seat and latch correctly.
    • Operate the system and verify 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 TSB addresses this concern, INSTALL a new HVAC control module. REFER to Climate Control .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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