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Alfa Romeo GT 3.2 V6 – ENGINE COOLING – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

Wiring diagram - ENGINE COOLING - Alfa Romeo GT 3.2 V6

ENGINE COOLING - WIRING DIAGRAM Alfa Romeo GT 3.2 V6

Components - ENGINE COOLING - Alfa Romeo GT 3.2 V6

Component code	Description	Reference to the assembly
B1	JUNCTION UNIT
B1	JUNCTION UNIT
B5	MAXI FUSE-1 BOX	-
B99	MAXIFUSE BOX ON BATTERY
C1	BATTERY EARTH	-
C11	RIGHT FRONT EARTH ( FRONT )	-
H1	IGNITION SWITCH
J30	ENGINE FAN 1ST SPEED RELAY ( FRONT )	-
J31	FAN 2ND SPEED RELAY	-
J32	FAN 2ND SPEED RELAY	-
K10	4 STAGE PRESSURE SWITCH ( FRONT )
M10	ENGINE MANAGEMENT ECU	Op. 1056B ALIMENTAZIONE MULTI-POINT INJECTION (MPI)
M10	ENGINE MANAGEMENT ECU
N11	ENGINE FAN MOTOR - 1
N12	ENGINE FAN MOTOR - 2
O10	ENGINE FAN ADJUSTMENT RESISTOR - 1
O12	ENGINE FAN ADJUSTMENT RESISTOR -2

Component location - ENGINE COOLING - Alfa Romeo GT 3.2 V6

ENGINE COOLING - COMPONENT LOCATION Alfa Romeo GT 3.2 V6

Components - ENGINE COOLING - Alfa Romeo GT 3.2 V6

Component code	Description	Reference to the assembly
B1	JUNCTION UNIT
B1	JUNCTION UNIT
B5	MAXI FUSE-1 BOX	-
B99	MAXIFUSE BOX ON BATTERY
C1	BATTERY EARTH	-
C11	RIGHT FRONT EARTH ( FRONT )	-
H1	IGNITION SWITCH
J30	ENGINE FAN 1ST SPEED RELAY ( FRONT )	-
J31	FAN 2ND SPEED RELAY	-
J32	FAN 2ND SPEED RELAY	-
K10	4 STAGE PRESSURE SWITCH ( FRONT )
M10	ENGINE MANAGEMENT ECU	Op. 1056B ALIMENTAZIONE MULTI-POINT INJECTION (MPI)
M10	ENGINE MANAGEMENT ECU
N11	ENGINE FAN MOTOR - 1
N12	ENGINE FAN MOTOR - 2
O10	ENGINE FAN ADJUSTMENT RESISTOR - 1
O12	ENGINE FAN ADJUSTMENT RESISTOR -2

Description - ENGINE COOLING - Alfa Romeo GT 3.2 V6

The radiator and air conditioner condenser cooling system consists of two electric fans operated in parallel at two different speeds:the first speed is activated at an initial engine coolant temperature level or a certain air conditioning refrigerant fluid pressure;the second speed is engaged at a higher temperature or pressure.The fans are operated by means of three specific relays located near the engine compartment junction unit.The supply line for the fans is protected by two special MAXIFUSES.

Operational description - ENGINE COOLING - Alfa Romeo GT 3.2 V6

The relays J30, J31and J32located next to the engine management control unit manage the engagement of the two fans N11and N12at two speeds: the coils are supplied by the line for fuse F6 of the engine compartment junction unit B1A.The relays are energized by an earth signal coming from the engine management control unit M10.If the engine coolant reaches an initial temperature level, or the 4 stage pressure switch K10signals to the control unit M10pin 9 of connector A - that the initial pressure level has been reached, then the control unit M10sends a signal from pin 50 of connector A to the 1st speed relay J30, which then sends the power supply to the fan N11via the additional resistance O10and to the fan N12via the additional resistance O12: the two fans turn at the first speed (slow).If the engine coolant reaches a higher temperature level, or the 4 stage pressure switch K10signals to the control unit M10pin 41 of connector A that the higher pressure level has been reached, then the control unit M10sends a signal from pin 62 of connector A to the two 2nd speed relays J31and J32, which then send the power supply to the fan N11and to the fan N12directly: the two fans turn at the maximum speed.