Alfa Romeo 159 2.4 JTD 20V Fino a 12/05 – ENGINE COOLING – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - ENGINE COOLING - Alfa Romeo 159 2.4 JTD 20V Fino a 12/05

ENGINE COOLING - WIRING DIAGRAM Alfa Romeo 159 2.4 JTD 20V Fino a 12/05

COMPONENTS - ENGINE COOLING - Alfa Romeo 159 2.4 JTD 20V Fino a 12/05

Component code	Description	Reference to the operation
B001	JUNCTION UNIT
B099	MAXIFUSE BOX ON BATTERY
C001	BATTERY EARTH	-
D009	FRONT/RADIATOR COUPLING	-
K120	LINEAR SENSOR FOR FANS
J030	ENGINE FAN SPEED 1 RELAY	-
M010	ENGINE MANAGEMENT ECU
N011	FAN MOTOR
N012	ENGINE FAN MOTOR - 2
O010	ENGINE FAN ADJUSTMENT RESISTANCE - 1
O012	ENGINE FAN 2 ADJUSTMENT RESISTANCE

COMPONENT LOCATION - ENGINE COOLING - Alfa Romeo 159 2.4 JTD 20V Fino a 12/05

ENGINE COOLING - COMPONENT LOCATION Alfa Romeo 159 2.4 JTD 20V Fino a 12/05

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Component code	Description	Reference to the operation
B001	JUNCTION UNIT
B099	MAXIFUSE BOX ON BATTERY
C001	BATTERY EARTH	-
D009	FRONT/RADIATOR COUPLING	-
K120	LINEAR SENSOR FOR FANS
J030	ENGINE FAN SPEED 1 RELAY	-
M010	ENGINE MANAGEMENT ECU
N011	FAN MOTOR
N012	ENGINE FAN MOTOR - 2
O010	ENGINE FAN ADJUSTMENT RESISTANCE - 1
O012	ENGINE FAN 2 ADJUSTMENT RESISTANCE

DESCRIPTION - ENGINE COOLING - Alfa Romeo 159 2.4 JTD 20V Fino a 12/05

The radiator and air conditioner condenser cooling system consists of two electric fans operated at two different speeds:- the first speed is activated at a first engine coolant temperature level and a certain air conditioning refrigerant fluid pressure;- the second speed comes on at a higher temperature or pressure.The activation of the fans is achieved by means of two specific relays located in the engine compartment junction unit and a third relay located on the duct for the actual fans.The supply line for the fans is protected by two special fuses, located in the engine compartment junction unit.

FUNCTIONAL DESCRIPTION - ENGINE COOLING - Alfa Romeo 159 2.4 JTD 20V Fino a 12/05

The relay J30, located on the fan duct, manages the engagement of the fans N11 and N12 at the first speed: the coil and the power line are supplied by the line protected by fuse F6 of the engine compartment junction unit B1.If the engine coolant reaches an initial temperature level, or the linear sensor K120 signals to the control unit M10 - pin 13 of connector A - that a certain pressure level has been reached, then the control unit M10 sends a signal - from pin 90 of connector A - which energizes the relay J30, which sends the power supply to the fans N11 and N12 via the additional resistances O10 and O12: the two fans turn together at the first speed (slow).The linear sensor K120 receives a power supply and reference earth from the engine management control unit M10, pin 12 and 22 of connector A.Relays T6 and T7 of the engine compartment junction unit B1 manage the switching on of the two speed fan N11: the coil power lines are protected by fuses F6 and F7 , also in engine compartment control unit B1 .If the engine coolant reaches a higher temperature level, or the linear sensor K120 signals to the control unit M10 - pin 13 of connector A - that a higher pressure level has been reached, then the control unit M10 sends a signal - from pin 69 of connector A - which energizes the two relays T6 and T7 which send the power supply directly to the fans N11 and N12 which turn together at the maximum speed.