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AIR CONDITIONING DESCRIPTION AND OPERATION 82-11 ATC ECU Inputs from sensors and the control panel switches are processed by the ATC ECU, which then outputs the ATC ECU connectors ATC ECU connector pin details Connector/Pin No. Description Input/Output C0791 1 Battery power supply Input 2 Ignition power supply Input 3 Sensor power supply Output 4 Earth - 5 Display illumination Input 6 Not used - 7 Not used - 8 Sensor earth - C0792 1 Night lighting/dimming Input 2 Vehicle speed Input 3 Hand of drive Input 4 Distribution flaps position Input 5 Heater coolant temperature Input 6 External air temperature Input 7 In-car air temperature Input 8 Blower power transistor collector voltage Input 9 Not used - 10 Not used - 11 Windscreen heater status Input 12 Rear screen heater status Input 13 Rear air conditioning ON Input |