IN-VEHICLE CALIBRATION & DTC CHECK
Note. Changing any ATC control head selector or button position unless instructed to do so, will abort door/actuator calibration and Diagnostic Trouble Code (DTC) check. System will return to normal operation. During in-vehicle calibration and DTC check, engine must be running and vehicle not moving.
- ATC system door/actuator calibration compensates for mechanical differences in actuators and A/C-heater assembly. Floor, mix, and front defrost buttons and blower motor control selector are used for ATC system door/actuator calibration and to check for any ATC system DTC stored in BCM.
- Set parking brake and place transmission in Park position. Start engine and ensure vehicle does not move. Set ATC control head temperature to 75°F so that any displayed DTC will not be confused with a displayed temperature.
- Turn blower motor control selector counterclockwise, to off position. Simultaneously press and hold floor, mix, and front defrost buttons. (Схема №1) Release buttons when ATC control head display begins to blink, indicating ATC control head has entered calibration/diagnostic mode. ATC control head display will continue to blink until door/actuator calibrations and ATC system DTC check are completed.
- If ATC system is okay and there are no stored DTCs, system will return to normal operation and temperature symbol "F" or "C" will be displayed. If there is a stored DTC, a two-digit DTC will be displayed. See «RETRIEVING DIAGNOSTIC TROUBLE CODES»(ref-211-S09304415412000030800000) under SELF-DIAGNOSTICS for DTC identification. To exit calibration/diagnostic mode, turn ignition off.