9-3 Arc/Aero (9440) L4-2.0L Turbo (2.0 T) (2004)
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Connection
The ventilation fan motor is connected to the corresponding fan control unit.
ACC
The fan control unit contains two connectors; a four-pin connector connected to the ACC unit and a two-pin connector which is directly-connected on the
ventilation fan motor. Four-pin connector: control unit B+ feed to pin 4 from fuse 23 (fuse board 22) and is connected to ground through pin 1 on
grounding point G41.
Fan speed is controlled from ACC unit pin 5 through control unit pin 3 with a 2 kHz PWM. Fan control unit pin 2 is connected to ACC unit pin 25 with
a return feed for diagnostics information. The control unit sends a 2 kHz PWM to the corresponding fan speed input. If a fault is detected, the control
