630282 - DESCRIPTION OF COMPONENTS

FANS

Specifications

Function

The two speed cooling fans make it possible to increase the capacity dissipate heat from the radiator and/or air conditioning system condenser.They are controlled directly by the injection control unit in accordance with a specific operating logic [DF 1060].

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.:

  • reduces injected fuel quantity (reduces engine power)
  • controls the cooling fan via the fan control interface
  • turns on the coolant warning light on the instrument panel.