WIRING DIAGRAM - AIR CONDITIONING - Fiat GRANDE PUNTO 1.9 Multijet
COMPONENTS - AIR CONDITIONING - Fiat GRANDE PUNTO 1.9 Multijet
| Component code | Description | Reference to the operation |
| B001 | JUNCTION UNIT | |
| B099 | MAXI FUSE BOX ON BATTERY | |
| C015 | DASHBOARD EARTH, DRIVER'S SIDE | - |
| C016 | AIR CONDITIONING UNIT EARTH | - |
| D021 | DASHBOARD/AIR CONDITIONING-HEATER COUPLING | - |
| D031 | PASSENGER FRONT DOOR COUPLING | - |
| H001 | IGNITION SWITCH | |
| 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 | |
| M072 | FAN SPEED VARIATOR | |
| N078 | LEFT MIXED AIR FLAP ACTUATOR | |
| N079 | RIGHT MIXED AIR FLAP ACTUATOR | |
| N082 | OUTSIDE / RECIRCULATION AIR INTAKE FLAP ACTUATOR | |
| N085 | PASSENGER COMPARTMENT AIR FAN | |
| N112 | RIGHT AIR DISTRIBUTION ACTUATOR | |
| N113 | LEFT AIR DISTRIBUTION ACTUATOR | |
| P061 | RIGHT EXTERNAL REAR VIEW MIRROR |
COMPONENT LOCATION - AIR CONDITIONING - Fiat GRANDE PUNTO 1.9 Multijet
| Component code | Description | Reference to the operation |
| B001 | JUNCTION UNIT | |
| B099 | MAXI FUSE BOX ON BATTERY | |
| C015 | DASHBOARD EARTH, DRIVER'S SIDE | - |
| C016 | AIR CONDITIONING UNIT EARTH | - |
| D021 | DASHBOARD/AIR CONDITIONING-HEATER COUPLING | - |
| D031 | PASSENGER FRONT DOOR COUPLING | - |
| H001 | IGNITION SWITCH | |
| 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 | |
| M072 | FAN SPEED VARIATOR | |
| N078 | LEFT MIXED AIR FLAP ACTUATOR | |
| N079 | RIGHT MIXED AIR FLAP ACTUATOR | |
| N082 | OUTSIDE / RECIRCULATION AIR INTAKE FLAP ACTUATOR | |
| N085 | PASSENGER COMPARTMENT AIR FAN | |
| N112 | RIGHT AIR DISTRIBUTION ACTUATOR | |
| N113 | LEFT AIR DISTRIBUTION ACTUATOR | |
| P061 | RIGHT EXTERNAL REAR VIEW MIRROR |
DESCRIPTION - AIR CONDITIONING - Fiat GRANDE PUNTO 1.9 Multijet
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: measusre the temperature at the vent outlet and send this information to the control unit;- 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 (left and right);- 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 compressor
FUNCTIONAL DESCRIPTION - AIR CONDITIONING - Fiat GRANDE PUNTO 1.9 Multijet
Climate control unit M70 is supplied directly at pin 30 from a line protected by fuse F38 of engine compartment control unit B1 while pin 39 receives a supply from the line of fuse F24 of relay T6 of B1: this ignition-operated supply (INT) is controlled from pin 1 of connector A of M1;Pin 40 of M70 is earthed.Climate control unit M70 is connected – from pins 1 and 2 - via the CAN line, to Body Computer M1 and to the other network nodes.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 7 of control unit M70 and gives out two signals: to pin 19 for the right area, to pin 10 for the left area.Sensors K111 (right lower treated air) and K113 (left lower treated air), K110 (right upper treated air) and K112 (left upper treated air) are connected to control unit M70: these sensors receive a reference earth from pin 11 and send signals to pins 20, 17, 9 and 18 of M70:The recirculation actuator N82 is operated by the control unit M70 from pins 12 and 22.Mixer actuators N78 and N79 are controlled by control unit M70 from pins 32-37 and 35-24 respectively, they receive a power supply for control of the potentiometer from pin 31 of M70, a referenence earth from pin 11 of M70, and send a feedback signal to pins 25 and 26 of M70.Mixer actuators N112 and N113 are controlled by control unit M70 from pins 33-34 and 36-38 respectively, they receive a power supply for control of the potentiometer from pin 31 of M70, a reference earth from pin 11 of M70, and send a feedback signal to pins 27 and 28 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.Body Computer M1 - connector G - is supplied directly from the battery from a line protected by maxifuse F2 of engine compartment control unit B1. It is ignition-operated (INT) at pin 32 of connector D. Pin 10 of connector H of M1 supplies a reference earth to the Body Computer.Fan N85 si supplied from a line protected by fuse F18 of engine compartment control unit B1 and from relay T5 of B1: this is an "ignition-operated except during start-up (INT/A)" supply controlled from pin 13 of connector A of M1.It receives the different speed controls from electronic governor M72: this receives the PWM regulation signal from pin 5 of control unit M70 and sends a feedback signal to pin 29 of M70.
