FATC 18 CONNECTOR B PIN DESCRIPTION 1, 2 Terminal 31 (Battery GND) 3 Not connected 4 Outside Sensor Temperature GND 5 Humidity Sensor GND 6 Not connected 7 Not connected 8 Not connected 9 Not Connected 10 Not Connected 11 Terminal 15 (ignition) 12 Not Connected 13 Not Connected 14 Not Connected 15, 16 Power terminal 30 battery 17 Not Connected 18 Humidity Sensor Vcc 19 Solar Sensor GND 20 Heater Rear Window (Package Protected) 21 Not connected 22 CAN L 23 Not connected 24 CAN H 25 Solar Sensor Signal 26 Not connected 27 AC output signal 28 Not connected 29 Not connected 30 Not connected 31 Not connected 32 Not connected 11. FATC UNIT The front HVAC unit comprises of the following parts: A. Blower B. Blower Controller C. Evaporator Coil and TXV D. Heater Coil E. Air Circulation Duct A. Blower The Blower is located at the left bottom side of the HVAC unit when viewed from inside the car. It acts as a centrifugal pump drawing in air from the center and pushing it out diagonally. The air flows through the evaporator and the heater coil and then to the cabin. The Blower speed is controlled using a blower resister. B. Blower Controller In case of FATC, a LPM or Blower controller is used to enable the ECU to control the blower speed in smaller increments. It is mounted on evaporator housing.
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