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Pinpoint Test Y: B10B8:63

WARNING: This page is about a different car, the 2023 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to MANUAL CLIMATE CONTROL SYSTEM for schematic and connector information.

    Normal Operation and Fault Conditions 

    Climate control system buttons held too long may set this DTC.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    HVAC B10B8:63 Push Buttons: Circuit/Component Protection Time-Out Buttons held too long may set this DTC. At least one button is stuck. This includes also the external buttons for Start/Stop and Eco Mode (Vehicle Drive Mode). DTC will log if failure condition is present for more than 120s

    Possible Sources 

    • HVAC control module

    NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

  2. Y1 CLEAN HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE BUTTONS

    • Ignition OFF.

    • Disconnect all HVAC control module connectors.

    • Attempt to clean the buttons on the HVAC controls. For additional information about recommended cleaning products, refer to the Owner's Literature.

    • Connect all disconnected electrical connectors. Make sure they seat and latch correctly.

    • Ignition ON.

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) on the module in question. Carry out the HVAC control module self-test.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  GO to Y2 
    No  The system is operating correctly at this time. The concern may have been caused by a stuck or a dirty button.

  3. Y2 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION

    • Ignition OFF.

    • Disconnect and inspect all HVAC control module electrical connectors.

    • Repair:

      • corrosion (install new connector or terminal - clean module pins)
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary

    • Connect all HVAC control module electrical connectors. Make sure they seat and latch correctly. WAIT 20 seconds for the range calibration to be executed after reconnecting of the module before any further assessment or measurement is made. If the actuator range calibration does not start, or has been interrupted, PERFORM the HVAC Calibration Routine, using a diagnostic scan tool.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC control module. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module .
    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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