Wiring diagram - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
Components - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
Component code | Name | Assembly reference |
B1 | Engine compartment junction unit | |
B99 | Maxifuse box on battery | |
H80 | Climate control controls | |
H81 | Climate control fan control | |
K86 | Frost sensor | - |
K87 | Lower treated air sensor | |
K88 | Upper treated air sensor | |
M1 | Body computer | |
M70 | Climate control system control unit | |
N79 | Right air mixture flap actuator | |
N82 | Outside / recirculation air intake flap actuator | |
N83 | Air distribution/defrost flap actuator | |
O30 | Air fan adjustment resistance | - |
O30 | Passenger compartment air fan adjustment resistor | - |
P60 | Driver''s external rear view mirror |
Location of components - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
Components - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
Component code | Name | Assembly reference |
B1 | Engine compartment junction unit | |
B99 | Maxifuse box on battery | |
H80 | Climate control controls | |
H81 | Climate control fan control | |
K86 | Frost sensor | - |
K87 | Lower treated air sensor | |
K88 | Upper treated air sensor | |
M1 | Body computer | |
M70 | Climate control system control unit | |
N79 | Right air mixture flap actuator | |
N82 | Outside / recirculation air intake flap actuator | |
N83 | Air distribution/defrost flap actuator | |
O30 | Air fan adjustment resistance | - |
O30 | Passenger compartment air fan adjustment resistor | - |
P60 | Driver''s external rear view mirror |
Description - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
An automatic system manages the passenger compartment climate control, i.e. temperature and ventilation with recirculation and air flow orientation, with separate management of the temperature for the left and right hand sides of the passenger compartment.
Description - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
On Diesel versions there is an additional electric heater which is switched on if the temperature of the coolant reaching the heater is low.
Description - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
For more details,.The climate control system ECU receives a signal from the body computer to indicate that the windscreen washer is on and activates the recirculation function to prevent the liquid detergent smell from entering the passenger compartment.The vehicle speed signal - received by the CAN network - is used to filter outdoor temperature and adjust ventilation and the dynamic air intake according to car speed.The body computer continually downloads a battery voltage signal for comparison with its limit value. If the recorded battery voltage is lower than the threshold, the computer cuts in via the CAN network to send a signal to disable a series of appliances: this includes the fan control.The climate control system control unit is supplied by two lines, one direct and one controlled by the ignition, protected by fuses in the underdashboard control unit. the fan is supplied by a line protected by a special fuse and by a specific relay in the engine compartment control unit.
Functional description - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
Climate control control unit M70 is supplied when the ignition is turned on (INT) at pin 1 of connector C from a line protected by fuse F49 of underfacia junction unit B2. it is supplied directly at pin 12 of connector C from a line protected by fuse F39 of underfacia control unit B2. Pin 6 of connector C of M70 is earthed.Control unit M70 is also connected to sensors K87 (right lower treated air - connector B - and left - connector A), K88 (right upper treated air - connector B - and left - connector A); these sensors receive a reference earth from pin 14 of connector A and send signals to pins 11, 1, 12 and 10 of M70.
Functional description - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
The frost sensor K86 receives a reference earthfrom pin 14 of connector A and sends a signal to pin 5 of connector A of M70 if the evaporator temperature is too low.
Functional description - AIR CONDITIONING - Fiat STILO 1.2 16v da 01/04
The solar ray sensor K90 informs the control unit of the solar radiation heat : it receives a 5V supply from pin 18 of control unit M70 and returns two signals: to pin 7 for the right area and to pin 6 for the left area.The exhaust gas presence sensor (A.Q.S.) K64 supplies a recirculation control signal when the air pollution exceeds pre-set levels: it is supplied at pin 1 from the line controlled by the ignition (INT/A) protected by fuse F31 of underfacia control unit B2 . pin 2 is earthed and pin 3 sends a signal to pin 10 of connector C of M70.The air conditioning system is equipped with one recirculation actuator ( N82 ), two air blending actuators (N78 and N79) and two air districution actuators ( N80 and N83 ).Recirculation actuator N82 is controlled by control unit M70, via pins 1 and 2 of connector B.The blend actuators N78 and N79 are operated by the control unit M70 by pins 9-11 and 3-4 of connector C, respectively, receiving the supply for controlling the potentiometer from pin 17 of connector A of M70, a reference earth from pin 14 of connector A of M70 and sending a feedback signal to pins 2 and 3 of connector A of M70.The distribution actuators N83 and N80 are operated by the control unit M70 by pins 12-10 and 5-6 of connector B, respectively, receive a supply for controlling the potentiometer from pin 17 of connector A of M70 , a reference earth from pin 14 of connector A of M70 and send a feedback signal to pins 12 and 13 of connector A of M70 .Fan N85 (with built-in electronic speed regulation circuit) is ignition-operated (INT) by a line protected by fuse F31 of underfacia control unit B2 and controlled by relay T8 and dedicated fuse F8 of engine bay control unit B1 -..it receives an input signal from the control unit controlling the various speeds from pin 11 of connector C of M70 and returns a feedback signal to pin 8 of connector A of M70Pin 4 of connector C of M70 controls engagement of the compressor.The outdoor temperature sensor is located on door mirror P60: the sensor is connected to the control unit on door M66 and thence, via the CAN network, to M70.