The two-speed cooling fan increase the heat dissipation capacity of the radiator and/or air conditioning system condenser.They are controlled directly by the injection control unit in accordance with a specific operating strategy [DF 1056B].
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.:
