8-VALVE 1.4
ENGINE
FIAT PUNTO TRAINING OUTLINE
Fiat Auto S.p.A.
After Sales Training
4.5.14 Radiator electric fan control
The control unit directly controls the radiator electric fan operation depending on the engine
coolant temperature and the air-conditioning system actuation.
The electric fan is switched off when the temperature exceeds 95°C (1
st
speed) or 105°C (2
nd
speed).
The switch-off takes place with hysteresis 3°C lower than the actuation threshold (approximate
values varying according to the various models and based on experimental tests).
The high and low speed functions are managed by the actuation of special remote-control
switches placed in the air-conditioning system management control unit and driven by the
injection control unit.
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