A/C Heater Control Calibration

The heater-A/C control module must be recalibrated each time an actuator motor or the control module is replaced.

1. Turn the ignition switch to the On position.
2. Simultaneously depress and hold the Power and Recirculation buttons on the heater-A/C control for at least five seconds. The Automatic Temperature Control (ATC) heater-A/C control Delay and Recirculation graphics will begin to flash when the calibration procedure has begun.
3. The calibration procedure should take less than twenty seconds. When the LEDs or graphics stop flashing, the calibration procedure is complete.
4. If the LEDs or graphics continue to flash beyond the normal twenty second (ATC) calibration time, it indicates that the heater-A/C control has detected a failure and a Diagnostic Trouble Code (DTC) has been set. Refer to Body Diagnostic Procedures to perform further diagnosis. 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 13 kilometers (8 miles).