The two-speed cooling fan increases the heat dissipation capacity of the radiator and/or air conditioning condenser.They are driven directly by the injection control unit on the basis of a specific operating strategy [DF 1056].
Fan control
According to coolant temperature and coolant pressure in the air conditioning system, the engine control node communicates with the fan control interface to provide enablement for:
fan activation at first or second speeds.
Engine coolant temperature control
The engine control node with coolant temperature higher than 105° C.:
