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Alfa Romeo GT 1.8 T.SPARK – ENGINE COOLING – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

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Wiring diagram - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK



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Components - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK



Component codeDescriptionReference to the assembly
B1 Engine compartment junction unit 5505A
B99 Maxifuse box on battery 5530B
C1 Battery earth-
C11 Right front earth-
H1 Ignition switch 5520A
K10 4 stage pressure switch 5040B
M10 Engine management control unit 1056B
N11 Engine fan motor 1088E
O10 Engine fan adjustment resistance 1088E

Component location - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK



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Components - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK



Component codeDescriptionReference to the assembly
B1 Engine compartment junction unit 5505A
B99 Maxifuse box on battery 5530B
C1 Battery earth-
C11 Right front earth-
H1 Ignition switch 5520A
K10 4 stage pressure switch 5040B
M10 Engine management control unit 1056B
N11 Engine fan motor 1088E
O10 Engine fan adjustment resistance 1088E

Description - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK


The radiator and air conditioner condenser cooling system consists of an electric fan operated 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 fan is operated by means of two specific relays located near the engine compartment junction unit.The supply line for the fan is protected by two special fuses, located in the engine compartment junction unit.The fan only comes on with the ignition ON.

Operational description - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK


The relays T6and T7of the engine compartment junction unit B1manage the engagement of the fan N11at two speeds: the coils are supplied by the ignition-operated line (15/54) whilst the power lines are protected by fuses F6 and F7, in the engine compartment junction unit B1...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 fan speed relay T6, which then sends the power supply to the fan N11via the additional resistance O10the fan turns 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 2nd fan speed relay T7, which then sends the power supply to the fan N11directly: the fan turns at the maximum speed.