Fiat 500 1.2 8v – ENGINE COOLING – – Manual air conditioning – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - ENGINE COOLING - Fiat 500 1.2 8v

ENGINE COOLING - WIRING DIAGRAM Fiat 500 1.2 8v

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COMPONENTS - ENGINE COOLING - Fiat 500 1.2 8v

Component Code	Description	Reference to the operation
A001	BATTERY
B001	JUNCTION UNIT
C045	FAN EARTH	-
K036	ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT
K120	LINEAR SENSOR FOR FANS
M010	ENGINE MANAGEMENT ECU
N011	FAN MOTOR
O010	ENGINE FAN ADJUSTMENT RESISTANCE - 1

COMPONENT LOCATION - ENGINE COOLING - Fiat 500 1.2 8v

ENGINE COOLING - COMPONENT LOCATION Fiat 500 1.2 8v

Get access to all wiring diagrams of the car

Component Code	Description	Reference to the operation
A001	BATTERY
B001	JUNCTION UNIT
C045	FAN EARTH	-
K036	ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT
K120	LINEAR SENSOR FOR FANS
M010	ENGINE MANAGEMENT ECU
N011	FAN MOTOR
O010	ENGINE FAN ADJUSTMENT RESISTANCE - 1

DESCRIPTION - ENGINE COOLING - Fiat 500 1.2 8v

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 operation of the fan at two different speeds (slow and high) is achieved by means of two dedicated relays located in the engine compartment junction unit.The fan supply lines are protected by two dedicated fuses located in the engine compartment junction unit.

FUNCTIONAL DESCRIPTION - ENGINE COOLING - Fiat 500 1.2 8v

Relay T06 and T07 of the engine compartment junction unit B001 manage the engagement of the fan N011 at the two speeds depending on the temperature of the engine coolant and the pressure in the air conditioning circuit.The coils for relays T06 and T07 are connected directly to the battery A001 (connector E) via pin 79 connector A of B001, whilst the power contacts are protected by fuses F06 and F07 of B001.Engine coolant sensor/sender unit K036 receives a reference earth from pin 36 of connector B of control unit M010 and sends a signal proportional to engine coolant temperature to pin 45 of connector B of the control unit.The linear sensor K120 notifies the control unit M010 (pin 5 of connector A) of the pressure of the refrigerant thereby allowing the control unit to exclude the engagement of the compressor if the above pressure values are not within the preset range.The linear sensor K120 receives a power supply and reference earth at pins 3 and 15 respectively of connector A of the engine management control unit M010.Corresponding to a 1st engine coolant temperature level or refrigerant pressure, the coil for relay T06 (pin 28 of connector B of B001) is energized by an earth signal coming from pin 63 of connector A of control unit M010; closing the dedicated contact, via pin 29 of connector B of B001, the power supply reaches fan N011 via the regulating resistance O010 which produces rotation at the 1st speed (slow).Corresponding to a higher engine coolant temperature level or refrigerant pressure, the coil for relay T07 (pin 27 of connector B of B001) is energized by an earth signal coming from pin 59 of connector A of control unit M010; closing the dedicated contact, via pin 26 of connector B of B001, the power supply reaches fan N011 which turns at the 2nd speed (high).The fan N011 is also connected to the fan earth C045.