Fiat 500 1.4 16v – ENGINE COOLING – – Manual air conditioning – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - ENGINE COOLING - Fiat 500 1.4 16v

ENGINE COOLING - WIRING DIAGRAM Fiat 500 1.4 16v

Get access to all wiring diagrams of the car

COMPONENTS - ENGINE COOLING - Fiat 500 1.4 16v

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 1.4 16v

ENGINE COOLING - COMPONENT LOCATION Fiat 500 1.4 16v

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 1.4 16v

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 activation of the fan at two different speeds (slow and fast) 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 1.4 16v

Relays 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 coil for relays T06 and T07 are connected directly to the battery A001 (connector E) via pin 79 connector A of B001, whilst the power contact is protected by fuses F06 and F097 of B001.Engine coolant sensor/sender unit K036 receives a reference earth from pin 29 of connector B of control unit M010 and sends a signal proportional to engine coolant temperature to pin 43 of the control unit.The linear sensor K120 notifies the control unit M010 (pin 57 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 28 and 7 respectively of connector A of the engine management control unit M010.At the 1st engine coolant temperature level or refrigerant fluid pressure, the coil for relay T06 (pin 28 of connector B of B001) is energized by an earth signal coming from pin 13 of connector A of control unit M010; when the dedicated contact closes, the power supply reaches the fan N011, via pin 29 of connector B of B001, through the adjustment resistance O010 which determines the rotation at the 1st speed (slow).For a higher engine coolant temperature level or refrigerant fluid pressure, the coil for relay T07 (pin 27 of connector B of B001) is energized by an earth signal coming from pin 12 of connector A of control unit M010; when the dedicated contact closes, the power supply reaches the fan N011, via pin 26 of connector B of B001, which rotates at the 2nd speed (fast).The fan N011 is also connected to the fan earth C045.