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Ventilation fan

Ventilation fan





The fan is supplied with +30 current from fuse 22. The control module regulates a control unit that supplies the fan motor on the ground side. The fan control unit is fitted on the driver's side of the climate housing and is cooled by the air flow in the evaporator housing. It is supplied with B+ from pin 13 on the MCC unit and power grounded from grounding point G41P. The ground lead is also reference ground from pin 35 on the control module. The fan control unit is controlled by an analogue voltage of 0-5 V from pin 14 on the MCC unit. The fan current increases as the control voltage increases.

The control voltage has the following values in the various knob positions:

0

0.00 V

1

0.93 V

2

1.40 V

3

2.20 V

4

5.00 V



Diagnostics

There is no diagnostics for the fan function.