Wiring diagram - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK
Components - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK
Component code | Description | Reference 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
Components - ENGINE COOLING - Alfa Romeo GT 1.8 T.SPARK
Component code | Description | Reference 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.