192004735 - E5020 ENGINE COOLING - DESCRIPTION

Description

The engine radiator and air conditioner condenser cooling system consists of one fan operated at two different speeds:

• the first speed is activated by the engine management control unit at a first temperature level of the engine coolant or at a certain air conditioner coolant pressure;
• The second speed cuts in at a higher temperature or pressure threshold.

The fan is managed by an electronic control unit which receives a PWM signal from the engine management control unit and manages the fan operation.The fan supply line is protected by a specific fuse, located in the engine compartment unit; another fuse - again in the engine compartment unit - protects the supply to the control electronics.