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WIRING DIAGRAM - ENGINE COOLING - Alfa Romeo 159 1.9 JTD 8V Da 01/06
COMPONENTS - ENGINE COOLING - Alfa Romeo 159 1.9 JTD 8V Da 01/06
| 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 | |
| M010 | ENGINE MANAGEMENT ECU | |
| N011 | FAN MOTOR | |
| O010 | ENGINE FAN ADJUSTMENT RESISTANCE - 1 |
COMPONENT LOCATION - ENGINE COOLING - Alfa Romeo 159 1.9 JTD 8V Da 01/06
| 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 | |
| M010 | ENGINE MANAGEMENT ECU | |
| N011 | FAN MOTOR | |
| O010 | ENGINE FAN ADJUSTMENT RESISTANCE - 1 |
DESCRIPTION - ENGINE COOLING - Alfa Romeo 159 1.9 JTD 8V Da 01/06
The radiator and air conditioner condenser cooling system consists of an electric fan 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 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.
FUNCTIONAL DESCRIPTION - ENGINE COOLING - Alfa Romeo 159 1.9 JTD 8V Da 01/06
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 .Both are energized by an earth control signal coming from the engine management control unit M10.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 1st speed fan relay T6 which sends the power supply to the fan N11 via the additional resistance O10: the fan turns 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.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 2nd speed fan relay T7 which sends the power supply directly to the fan N11: the fan turns at the maximum speed.
