Grand Caravan V6-3.3L VIN R (2005)
Control Assembly: Service and Repair
A/C Heater Control Calibration - Front
The A/C-heater control module must be recalibrated each time an actuator motor or the A/C-heater control is replaced. If the vehicle is so equipped, the
calibration procedure also includes rear HVAC positions for each actuator motor.
1. Turn the ignition switch to the On position.
2. If equipped with the manual temperature control (MTC) system, press and hold the Rear Wipe/ Wash and Recirculation buttons for at least five
seconds. If equipped with the automatic temperature control (ATC) system, simultaneously press and hold the Power and Recirculation buttons on
the A/Cheater control for at least five seconds. The MTC A/C-heater control Rear Wipe/Wash button light emitting diode (LED) and
Recirculation button LED, or the ATC A/C-heater control Delay and Recirculation graphics will begin to flash when the calibration procedure has
begun.
3. The calibration procedure should take less than two minutes to complete for the manual A/C-heater control, and less than twenty seconds for the
ATC A/C-heater control. When the LEDs or graphics stop flashing, the calibration procedure is complete.
4. If the LEDs or graphics continue to flash beyond the two minute (manual) or twenty second (ATC) calibration time, it indicates that the
A/Cheater control has detected a failure and a Diagnostic Trouble Code (DTC) has been set. 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).
