3363712 - Introduction - AIR CONDITIONING CASING AND COMPONENTS
SPECIFICATIONS
INTRODUCTION
The climate control system fitted on the vehicle is a system which allows the alteration of the ambient characteristics of the air introduced into the passenger compartment (temperature and humidity) making it possible to demist the glass surfaces and prevent the intake of pollutant substances in an attempt to make the environment in the passenger compartment healthier.The air conditioning system is a feature which contributes greatly to improving the feeling of well being.TYPE
This vehicle is fitted with a climate control system and a heater unit.The split automatic climate control system controls the temperature on both the driver and passenger sides, heating or cooling the air introduced into the passenger compartment so that it reaches the desired level. The heater unit differs from the climate control through the absence of the refrigeration circuit and the lack of the partition dividing the mixture flaps.The variation in the temperature and the humidity of the air in the passenger compartment is achieved by the following two systems:
- manually operated climate control system, which is fitted as standard on the vehicle.
- automatically controlled temperature (twin zone) and ventilation climate control system, available as an option of vehicles with higher specification levels.
AUTOMATIC CLIMATE CONTROL SYSTEM CONTROL UNIT
The controls for the automatic climate control system are located on the electronic control unit user interface.The system is managed by a control unit which is capable of controlling the temperature in two areas of the passenger compartment, heating or cooling the incoming air so that it reaches the desired temperature.The diagram below shows the location of the passenger compartment air temperature sensor (1)
Control unit pin out
The diagram below shows the layout of the connectors.
| PIN. | FUNCTION |
|---|---|
| 01 | Closed recirculation control |
| 02 | Open recirculation control |
| 03 | Right mixer control |
| 04 | General right mixer |
| 05 | General distribution 2 (FLOOR-VENT) |
| 06 | Distribution 2 control (FLOOR-VENT) |
| 07 | PTC 2 relay feed |
| 08 | PTC 1 relay feed |
| 09 | Left mixer control |
| 10 | Distribution 1 control (DEF) |
| 11 | General left mixer |
| 12 | General distrbution 1 (DEF) |
| PIN. | FUNCTION |
|---|---|
| 01 | Treated temperature sensor |
| 02 | Left mixer feedback |
| 03 | Right mixer feedback |
| 04 | Distribution feedback (DEF) 1200 cc only |
| 05 | Frost sensor |
| 06 | Left solar radiation sensor |
| 07 | Right solar radiation sensor |
| 08 | Fan feedback |
| 09 | Not connected |
| 10 | Right VENT treated temperature sensor |
| 11 | Left FLOOR treated temperature sensor |
| 12 | Left VENT treated temperature sensor |
| 13 | Distribution 2 feedback (FLOOR-VENT) |
| 14 | Analogue earth |
| 15 | Tx serial |
| 16 | Rx serial |
| 17 | 5V outside supply |
| 18 | Solar radiation sensors supply |
| PIN. | FUNCTION |
|---|---|
| 01 | Signal + key |
| 02 | CAN L line |
| 03 | CAN H line |
| 04 | Compressor relay feed |
| 05 | Heated rear windscreen operation |
| 06 | Power earth |
| 07 | Not connected |
| 08 | Not connected |
| 09 | Misting sensor |
| 10 | Pollution sensor |
| 11 | Fan control |
CONTROL PANEL
The control unit which manages the automatic climate control is capable of producing and maintaining the desired comfort in two areas of the passenger compartment by controlling the following parameters and functions:
- Air temperature at the driver/passenger vents;
- Speed of the fan (varies continuously);
- Air distribution;
- Compressor engagement;
- Recirculation;
The dual-zone system regulates the following parameters automatically:
- temperature of the air at the driver and passenger vents
- distribution of the air at the vents;
- fan speed (flow rate);
- enabling the compressor;
- recirculation
Self-learning procedure
The AUTO and MONO buttons must be pressed simultaneously within 40 seconds of the ignition being turned to the ON position in order to active this procedure. A few seconds later a figure will appear on the display (in place of the driver's side set temperature) which will count down to indicate the time remaining before the start of the procedure. At the same time (i.e. whilst the count down is taking place) the previous self-learning status is signalled on the passenger temperature setting:
- '1' flashes if the previous self-learning procedure failed
- '0' indicates that the previous self-learning procedure was successful
 | Exiting the procedure zeroes the 40 second counting period from when the ignition is switched ON, to allow the procedure to be repeated without having to switch the ignition OFF. |
 | Each time a new control unit is fitted, the flap actuator learning test must be carried out using the diagnostic equipment and the unit must be personalized through programming. |
Introduction
All the buttons (except the adjustment ones) have dual functions (ON/OFF) including the recirculation which has rolling managementThe diagram below illustrates the climate control system control unit panel
the request by the user (driver knob 1 or passenger knob 2) for the HI or maximum heating condition switches off the FULL AUTO icon (A on the display) and forces the MONO condition (B on the display) regulating the following parameters:
- The recirculation and compressor status remain unaltered;
- The mixture flaps are in the fully hot position;
- The distribution flap is in the FLOOR position and the LED (in button 5) is on;
- The air flow rate value is max.
The LO or maximum cooling setting (shown on the display in range E1 and E2) switches off the FULL AUTO icon condition and forces the MONO condition involving the following actions:
- Enabling of the compressor (display I);
- Mixture flaps in fully cold position;
- Max air flow rate value;
- Recirculation remains unaltered as requested by user
Pressing this button (1A) causes the FULL AUTO logo to appear and the system is managed automatically controlling the:
- Air distribution;
- Fan speed;
- Compressor;
- Recirculation.
| Pressing the compressor deactivation button (6) will not necessarily switch off the FULL AUTO logo. |
MAIN DISTRIBUTIONS:
- DEF (hot/cold air or a mixture for defrosting) (button 3)
- VENT (hot/cold ventilated air or front mixture) (button 4)
- FLOOR (hot/cold air or a mixture at the floor) (button 5)
Combined Distributions:
- BILEVEL (VENT-FLOOR) (4-5)
- HEAT (DEF-FLOOR) (3-5)
- DEF-VENT (3-4)
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