The supply for the fan N11 arrives directly from the battery via relay R6 housed in the engine compartment junction unit B01 from the line entering at pin 1 connector A of the actual unit.This supply line is protected by fuse F6 housed in the junction unit B01 .The relay R6 is enerigzed by an earth signal coming from the engine management control unit M10 . The engine temperature sensor K45 measures the temperature of the engine coolant and, if the values for this parameter are high, the control unit M10 sends an earth signal from pin 8 of connector B (1242 8 V engine; in the case of the 1596 16V version, the energizing signal for the relay R6 comes out of the engine management control unit at pin 55 of connector A) and an earth signal to the relay which energizes the coil. The relay sends the supply to the fan N11 from pin C connector C of the junction unit B01 .
Functional description
The supply for the fan N11 arrives directly from the battery via relays R6 and R7 housed in the engine compartment junction unit B01 from the line entering pin 1 connector A of the actual junction unit.The supply for the relays is protected by fuse F7 for relay R7 and fuse F6 for relay R6 .They are energized by an earth signal coming from the engine control unit M10 .The engine temperature sensor K45 measures the temperature of the engine coolant and, if the values for this parameter are high, the control unit M10 sends an earth signal from pin 8 of connector B (1242 8V engine, for the 1596 16V version the energizing signal for the relay R6 comes out of the engine management control unit from pin 55 of connector A) to the 1st speed relay for the fan R6 which energizes the coil. The relay R6 then sends the supply, through the resistance O10 , operating the fan N11 at the first speed (slow).The high pressure in the climate control system, measured by the 4 stage pressure switch, determines the switching on of the second speed ( See E6021 COMPRESSOR ENGAGEMENT).If the engine coolant reaches a higher temperature, the control unit N10 sends from pin 18 of connector B (1242 8V engine; in the case of the 1596 16V version the energizing signal for the relay R7 comes out of the engine management control unit at pin 59 of connector A) an earth signal to relay R7 which sets the second fan N11 speed so that it rotates at maximum speed.This signal comes out of pin A connector C of the engine compartment junction unit B01 .