Fiat BRAVO 1.9 JTD 8v – AIR CONDITIONING – – Automatic air conditioning – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - AIR CONDITIONING - Fiat BRAVO 1.9 JTD 8v

AIR CONDITIONER - WIRING DIAGRAM Fiat BRAVO 1.9 JTD 8v

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COMPONENTS - AIR CONDITIONING - Fiat BRAVO 1.9 JTD 8v

Component code	Description	Reference to the operation
B001	JUNCTION UNIT
B002	JUNCTION UNIT UNDER DASHBOARD
B099	MAXI FUSE BOX ON BATTERY	-
C010	LEFT FRONT EARTH	-
C016	AIR CONDITIONING UNIT EARTH	-
C038	EARTH ON CENTRE TUNNEL	-
D008	AIR CONDITIONING-HEATER FRONT COUPLING	-
D031	PASSENGER FRONT DOOR COUPLING	-
E050	INSTRUMENT PANEL
H001	IGNITION SWITCH
K064	EXHAUST GAS PRESENCE SENSOR
K090	SOLAR SENSOR
K110	RIGHT UPPER AIR DISTRIBUTION TEMPERATURE SENSOR
K111	RIGHT LOWER AIR DISTRIBUTION TEMPERATURE SENSOR
K112	LEFT UPPER AIR DISTRIBUTION TEMPERATURE SENSOR
K113	LEFT LOWER AIR DISTRIBUTION TEMPERATURE SENSOR
M001	BODY COMPUTER
M070	CLIMATE CONTROL SYSTEM CONTROL UNIT
N078	LEFT MIXED AIR FLAP ACTUATOR
N079	RIGHT MIXED AIR FLAP ACTUATOR
N080	AIR DISTRIBUTION FLAP ACTUATOR
N082	OUTSIDE / RECIRCULATION AIR INTAKE FLAP ACTUATOR
N083	AIR DISTRIBUTION/DEFROST FLAP ACTUATOR
N085	PASSENGER COMPARTMENT AIR FAN
P061	PASSENGER DOOR MIRROR

COMPONENT LOCATION - AIR CONDITIONING - Fiat BRAVO 1.9 JTD 8v

AIR CONDITIONER - COMPONENT LOCATION Fiat BRAVO 1.9 JTD 8v

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Component code	Description	Reference to the operation
B001	JUNCTION UNIT
B002	JUNCTION UNIT UNDER DASHBOARD
B099	MAXI FUSE BOX ON BATTERY	-
C010	LEFT FRONT EARTH	-
C016	AIR CONDITIONING UNIT EARTH	-
C038	EARTH ON CENTRE TUNNEL	-
D008	AIR CONDITIONING-HEATER FRONT COUPLING	-
D031	PASSENGER FRONT DOOR COUPLING	-
E050	INSTRUMENT PANEL
H001	IGNITION SWITCH
K064	EXHAUST GAS PRESENCE SENSOR
K090	SOLAR SENSOR
K110	RIGHT UPPER AIR DISTRIBUTION TEMPERATURE SENSOR
K111	RIGHT LOWER AIR DISTRIBUTION TEMPERATURE SENSOR
K112	LEFT UPPER AIR DISTRIBUTION TEMPERATURE SENSOR
K113	LEFT LOWER AIR DISTRIBUTION TEMPERATURE SENSOR
M001	BODY COMPUTER
M070	CLIMATE CONTROL SYSTEM CONTROL UNIT
N078	LEFT MIXED AIR FLAP ACTUATOR
N079	RIGHT MIXED AIR FLAP ACTUATOR
N080	AIR DISTRIBUTION FLAP ACTUATOR
N082	OUTSIDE / RECIRCULATION AIR INTAKE FLAP ACTUATOR
N083	AIR DISTRIBUTION/DEFROST FLAP ACTUATOR
N085	PASSENGER COMPARTMENT AIR FAN
P061	PASSENGER DOOR MIRROR

DESCRIPTION - AIR CONDITIONING - Fiat BRAVO 1.9 JTD 8v

An automatic system manages the passenger compartment climate control, in other words the temperature and the ventilation, with recirculation and direction of the air flows, with separate management for the left and right sides of the passenger compartment.A special control unit manages the operation of the system by controlling:- air temperature at the vents (driver''s/passenger side);- air distribution to the vents;- fan speed (continuous variation);- compressor engagement (air refrigeration circuit);- air recirculation engagement;- the MAX-DEF rapid defrosting function (which consists of a collection of measures which make it possible to demist both the windscreen and the rearscreen quickly);The control unit sets the above parameters so that temperature of the passenger compartment is adjusted to the desired temperature. The system controls are located on the outside of the container which houses the control unit.The following parameters/functions can be altered manually:- fan speed;- distribution arrangement;- compressor disabling;- defrosting/demisting;- recirculation.Manual selections always take priority over automatic ones and are memorized until the user cancels the command by returning to automatic operation.The control unit acquires information on the temperature and climate conditions both inside and outside the vehicle by means of special sensors:- outside temperature sensor, located on the passenger door mirror: the sensor value is acquired by the Body Computer and is then sent, via the CAN, to the climate control system control unit as well as to the instrument panel and to other consumers;- solar sensor, which measures the sun rays on the windscreen;- four treated air sensors: measures the temperature at the vent outlet and send this information to the control unit;- exhaust gas presence sensor (A.Q.S.: Air Quality Sensor): provides a signal when the air pollution index exceeds the pre-set levels: this signal engages the recirculation in order to prevent polluted air from entering the passenger compartment; A.Q.S.- passenger compartment air sensor: this is incorporated in the control unit; it is also suitably ventilated and measures the temperature inside the vehicle.On the basis of the calculations made, the following are set:- the speed of the air introduced in the passenger compartment by means of an electronic governor that controls the fan;- the temperature of the actual air by means of two mixture actuators (one for the right side of the passenger compartment and one for the left side)- the distribution of the flows with another two actuators;- the interior/exterior air recirculation function by means of another specific actuator.All actuators are controlled by an electronic control unit.If the conditions require, the control unit also switches on the air cooling and dehumidification circuit, activating the air conditioning compressor767For more details,When the outside temperature measured is below 3 °C, the message "Danger Ice" and the snowflake symbol flash in the instrument panel display.There is an additional electric heater available as an option which comes on if the temperature of the engine coolant reaching the heater is extremely low.The climate control system control unit M70 receives a power supply via two lines, one direct and one ignition-operated, protected by fuses in the junction unit under the dashboard; the fan receives a power supply through a line protected by a specific fuse and a specific relay in the engine compartment junction unit.

FUNCTIONAL DESCRIPTION - AIR CONDITIONING - Fiat BRAVO 1.9 JTD 8v

The climate control system control unit M70 receives an ignition-controlled power supply (INT) at pin 1 of connector C from the line protected by fuse F51 of the junction unit under the dashboard B2; it receives a direct power supply at pin 12 of connector C from the line protected by fuse F39 of the junction unit under the dashboard B2. Pin 6 of connector C of M70 is earthed.Control unit M70 is connected, via the CAN line, from pins 2 and 3 of connector C to the Body Computer M1 and to the other nodes exchanging the following signals:- outside temperature signal;- speedometer signal;- windscreen washer engagement signal for activating recirculation;- window closing control; - battery voltage signal.Sensors K111 and K113 (right and left lower treated air) and K110 and K112 (right and left upper treated air) are connected to control unit M70: these sensors receive a reference earth from pin 14 of connector A and send the signals to pins 11, 1, 12 and 10 of connector A of M70.The solar sensor K90 informs the control unit of the heat coming from the sun''s rays: it receives a 5V power supply from pin 18 of connector A of control unit M70 and gives out two signals: to pin 7 for the right area, to pin 6 for the left area.The exhaust gas presence sensor (A.Q.S.) K64 provides a recirculation control signal when the air pollution index exceeds the pre-set harmful levels: it receives a power supply at pin 1 from the ignition-controlled line (INT) protected by fuse F51 of the junction unit under the dashboard B2; pin 2 is earthed and pin 3 sends a signal to pin 10 of connector C of M70.The sensor which measures the outside temperature is located on the passenger door mirror P61: the sensor is connected to Body Computer M1 and from there, via the CAN, to M70.The Body Computer M1 receives a direct supply from the battery via the line protected by maxifuse B99 at pin 18 of connector F of the interface with the junction unit under the dashboard B2; the ignition-controlled supply (INT) reaches pin 9 of connector F of the interface with the junction unit B2.Mixer actuators N78 and N79 are controlled by control unit M70 from pins 9-11 and 3-4 respectively of connector B, they receive a power supply for control of the potentiometer from pin 17 of connector A of M70, a referenence earth from pin 14 of connector A of M70, and send a feedback signal to pins 2 and 3 of M70.Distribution actuators N83 and N80 are controlled by control unit M70 from pins 12-10 and 5-6 respectively of connector B, they receive a power supply for control of the potentiometer from pin 17 of connector A of M70, a referenence earth from pin 14 of connector A of M70, and send a feedback signal to pins 12 and 13 of connector A of M70.Recirculation actuator N82 is controlled by control unit M70 by pins 1 and 2 of connector B.The fan N85 (with built-in electronic speed adjustment) receives an ignition-controlled power supply (INT/A) from the line protected by fuse F31 of the junction unit under the dashboard B2 and controlled by relay T8 and dedicated fuse F8 of the engine compartment junction unit B1; it receives an input control signal from the control unit for the various speeds from pin 11 of connector C of M70 and returns a feedback signal to pin 8 of connector A of M70.Pin 4 of connector C of M70 controls compressor activation:Pins 7 and 8 of connector B of M70 control the engagement of the additional electric heater: