Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test Ac: B10B8:63
- Refer to Wiring Diagrams 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. 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.
- AC1 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 AC2 No The system is operating correctly at this time. The concern may have been caused by a stuck or a dirty button. - AC2 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, carry out 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 the appropriate REMOVAL AND INSTALLATION . 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.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.