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.
HVAC Control Calibration
The HVAC control module must be recalibrated each time an actuator motor or the control module is replaced. If the vehicle is so equipped, the calibration procedure also includes rear HVAC positions for each actuator motor.
- Turn the ignition switch to the ON position.
- Simultaneously depress and hold the Power and Recirculation buttons on the HVAC control for at least 5 seconds. The manual HVAC control power Light Emitting Diode (LED) and Recirculation LED, or the Automatic Temperature Control (ATC) HVAC control Delay and Recirculation graphics will begin to flash when the calibration procedure has begun.
- The calibration procedure should take less than 2 minutes to complete for the manual HVAC control and less than 20 seconds for the ATC HVAC control. When the LEDs or graphics stop flashing, the calibration procedure is complete.
- If the LEDs or graphics continue to flash beyond the normal 3 minute (manual) or 20 second (ATC) calibration time, it indicates that the HVAC control has detected a failure and a Diagnostic Trouble Code (DTC) has been set. Use a DRBIII® scan tool to perform further diagnosis. See SELF-DIAGNOSTIC SYSTEM . The LEDs or graphics will continue to flash even after the ignition switch is cycled Off and On, until a successful calibration is completed or until the vehicle has been driven about 8 miles (13 kilometers).
Use the Manual With the Right Hardware
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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.
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