312001202 - INTRODUCTION - CLIMATE CONTROL - MISCELLANEOUS
Interior air distribution diagram
The distribution of the air in the passenger compartment is illustrated in the diagram.
This vehicle can be equipped with two different climate control systems for the passenger compartment:
- manual climate control
- mono-zone automatic climate control
The difference between the two types of system, manual and automatic, lies purely in the management of the system:
- manual climate control: the user sets the air temperature, distribution and flow rate and they remain like that until they are altered by the user later on
- automatic climate control: the user can set the parameters and select automatic system management. If they so wish, the user can retain the facility to manage the system manually.
Manual climate control
The manual climate control system control panel is illustrated in the diagram below
Operating strategy
The manual air conditioning also allows the user to manage the temperature and the intake of air into the passenger compartment using the various control knobs.The following parameters/functions can be altered manually:
- Temperature
- Distribution in 5 positions
- Fan speed.
- Compressor enablement
- Defrosting/demisting function
- Recirculation
There are some limitations set by the outside temperature, measured by the outside temperature sensor incorporated in the left exterior rear view mirro, which restrict the operation of the compressor:
- if the outside temperature < -1°C the compressor is disabled
- if the outside temperature > 1°C the compressor is enabled
Automatic climate control
The automatic climate control is the mono zone type with a pollen filter.This system can be managed automatically by an electronic control unit known as the Climate Control Node (NCL) which is charged with keeping the air climate control conditions set, and therefore desired, by the user unchanged.The NCL is connected to the vehicle''s electrical system B-CAN.The NCL is incorporated in the climate control system control panel fitted in the dashboard in the middleThe diagram below illustrates the back of the control unit showing the connections to the electrical system and the connector pin out.
Automatic climate control
Connector A blue 12 pin| PIN | FUNCTION |
|---|---|
| 01 | Mixture feedback |
| 02 | 5V power supply |
| 03 | n.c. |
| 04 | n.c. |
| 05 | Recirculation control (+) |
| 06 | Dynamic control (-) |
| 07 | Distribution feedback |
| 08 | Compressor activation/deactivation |
| 09 | Mixture control (+) |
| 10 | Mixture control (-) |
| 11 | Distribution control (+) |
| 12 | Distribution control (-) |
| PIN | FUNCTION |
|---|---|
| 01 | + 30 Battery |
| 02 | Key signal + |
| 03 | Electronic earth |
| 04 | n.c. |
| 05 | Analogue earth |
| 06 | Frost sensor |
| 07 | Fan feedback |
| 08 | Fan control |
| 09 | CAN B (High) |
| 10 | CAN B (Low) |
| 11 | FLOOR temperature sensor |
| 12 | VENT temperature sensor |
 | After the control unit or one of the actuators has been replaced the self-learning procedure for the position of the flaps must be carried out using the Examiner. |
Operating strategy
The front section of the control panel is illustrated in the diagram below:
Operating strategy
The manual system parameters/functions can be altered manually:
- Temperature
- Distribution in 5 positions
- Fan speed.
- Compressor enablement
- Defrosting/demisting function
- Recirculation
Introduction to functional status display.
The display of the climate control system function status is shown through the LED and the DISPLAY:
- RECIRCULATION function: button with vehicle profile and amber LED, signals the recirculation function engaged if on
- Compressor Enablement Function LED: button with snowflake symbol and amber LED if on, signals the compressor enabled status.
- AUTO LED: button with the word AUTO and amber LED if on signals that all the functions are managed by the control system. The AUTO LED switches off if there is at least one flow rate, distribution, Compressor or Recirculation manual control.
- LED for MAX-DEF function: button with amber LED which, if on, signals the activation of the MAX DEF function.
- HEATED REAR WINDSCREEN function LED: YELLOW, signals the heated rear windscreen function on.
- DISPLAY: NEGATIVE TRANSREFLECTIVE type displays the passenger compartment fan air flow rate, temperature settings ( in °C or °F ) by means of bars.
- LED OFF: button with word OFF and amber LED if on, signals the control unit off.
- Distribution status LED: amber signalling the status of the air distribution in the passenger compartment.
Switching on after vehicle has been stopped
On switching on the various parameters are controlled manually or automatically depending on the selections made by the user before switching off.Therefore all the manual interventions before the vehicle stopped are memorized and maintained until the subsequent starting, except those involving safety (demisting, etc.) which are described below.This is also valid for the OFF function; if it was OFF before switching off, the system will be OFF again when the vehicle is started up.If at the previous key-off, the control was at Max Def, at the next key-on the system will assume the condition memorized before the Max Def.Control of the temperature
Selection of temperature setting.The choice of the passenger compartment temperature setting is made by the control unit each time the battery is connected at 22 °C. The user can alter the temperatures set using the appropriate buttons.The variations are in steps of 0.5 ºC.The variation in the temperature range goes from 16°C to 32°C; below 16°C the value set becomes "LO", whilst above 32°C the value set becomes "HI".When the control unit is switched off, the temperature value set, shown on the display, is memorized and restored at the next key-on.Winter starting transitionIn order not to create problems for the user, such as blasts of cold air and/misting up of the windscreen, in certain temperature conditions, when the control unit is switched on, the system activates the management of the "WINTER STARTING TRANSITION".This procedure involves the control unit checking for the simultaneous existence of the following conditions:
- engine coolant temperature is below - 4°C
- outside temperature below 19°C
If these conditions exist, the control unit launches the "winter transition starting" procedure, setting:
- the air flow rate at the first bar
- the distibution is in Def
- the mixture in AUTO conditions
This request by the user involves the following actions:
- Mixer: the air mixture flap should be controlled in the ALL COLD position
- Distribution: the distribution flap is in the VENT position (by default) and the LED comes on (visible to the user)
- Ventilation: the air flow rate (by default) is displayed through 10 bars
- Recirculation: the user setting remains with all the rules defined in the recirculation rules
- Compressor: enabled (LED on if previously switched off).
The interruption of the management function of the maximum cold state takes place as a result of one of the following functions taking priority over the maximum cold state management (LO):
- +KEY OFF status management function;
- OFF status management function;
- MAX-DEF status management function.
This request by the user involves the following actions:
- Mixer: the air mixture flap should be controlled in the ALL HOT position
- Distribution: the distribution flap is in the FLOOR position (by default) with XX% flow to the DEF and the LED comes on (visible to the user)
- Ventilation: the air flow rate (by default) is displayed through 10 bars (with limits due to winter transition)
- Recirculation: the user setting remains with all the rules defined in the recirculation rules
- Compressor: remains as set by the user
The interruption of the management function of the maximum cold state takes place as a result of one of the following functions taking priority over the maximum cold state management (HI):
- +KEY OFF status management function;
- OFF status management function;
- MAX-DEF status management function.
Pressing the AUTO button, signalled by the LED coming on, returns the control of the following functions to the automatic mode:
- Air distribution
- Fan speed
- Compressor
- Recirculation
As a result:
- switching on of AUTO LED
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