automatic Citroen C4 PICASSO 2008 1.G Service Manual

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Sensors
The automatic regulation of the air conditioning inside the cabin uses a number of sensors that relieve you of the need to make adjust-ments outside the displayed tem-perature.
Be careful not to obstruct the sun-light sensor located on the dash-board.
Air inlet
Check that the exterior grille for the air inlet, at the bottom of the windscreen, is clean and free of dead leaves, snow, etc.
Air vents
The air vents to the face have grilles and thumbwheels so that you can adjust the air fl ow and direction (up-down, right-left).
Air circulation
Air vents on the fl oor underneath the front seats provide enhanced heating for the rear seat positions : take care not to obstruct them.
Dust fi lter / odour fi lter (active carbon)
There is a fi lter for excluding odours and dust.
This fi lter has to be changed in accordance with the vehicle main-tenance schedule (see the Main-tenance Guide).
Air conditioning
To ensure that your system oper-ates correctly, it is recommended to have it checked regularly.
Water arising from condensation in the air conditioning drains away through a hole provided for this purpose. A pool of water may thus form under the vehicle when sta-tionary.
To keep the air conditioning com-pressor well sealed, it is essential to operate the air conditioning at least once in every month.
To be effective, the air condition-ing should only be used with the windows closed.
If after a lengthy stop in bright sunlight the interior temperature is excessive, ventilate the passen-ger compartment by opening the windows for a few moments, then close them again.
The air conditioning operates by using power from the engine. This results in a slight increase in fuel consumption.
V E N T I L A T I O N - H E A T I N G A I R C O N D I T I O N I N G

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B. PASSENGER’S CONTROL PANEL
Adjustment of temperature
- Press on button 1 to take over control of the tem-perature. The warning lamp on button 1 lights up.
- Rotate button 1 to adjust your temperature.
Note : The adjustment of the temperature is continuous and progressive starting from one side.
V E N T I L A T I O N - H E A T I N G M A N U A L A I R C O N D I T I O N I N G
Observation : If your vehicle is not equipped with air conditioning, you will have the same control panel but without the A/C button.
6 - Deicing / demisting of the rear screen
This operates only if the engine is running.
- Press on button 6 to activate/deactivate the electric deicing/demisting of the rear screen and the exterior rear view mirrors. The warning lamp lights up.
The deicing/demisting switches off automatically to prevent excessive consumption of power.
7 - Rapid deicing / demisting of front and rear windows and rear view mirrors
- Press on button 7. The warning lamp lights up.
This function simultaneously activates :
- front deicing/demisting,
- optimum fl ow of air,
- recirculation prohibition,
- deicing/demisting of rear view mirrors and heated rear screen,
- air conditioning if necessary.
To stop the function, press again on button 7.
8 - Adjustment of the air blower temperature
This control is for adjusting the temperature of the air in the passenger compartment. It can be used in cold weather as well as in hot weather, provided the air conditioning is active.
Note : The adjustment of the temperature is continuous and progressive starting from one side.

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- Heating /Manual air conditioning
To make the best use of the system, we recommend :
- Automatic air conditioning
With automatic air conditioning, you are recommended to choose AUTO operation.
V E N T I L A T I O N - H E A T I N G -
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A U T O M A T I C A I R C O N D I T I O N I N G
1 - Automatic comfort regulation
A press on this button, confi rmed by the dis-play of the A/C warning lamp and of AUTO on the screen, provides automatic control, at the temperature selected, of all the following 5 functions :
- air fl ow,
- cabin temperature, on left hand side and right hand side,
- air distribution,
- air conditioning,
- automatic air recirculation.
For this facility to operate, it is recommended to keep all the air vents open.
Using the AUTO mode will prevent misting inside the vehicle in cold or humid weather.
Note : When starting from cold, in order to avoid a rush of cold air, the blower attains its optimum level progressively.
Manual resumption of one or more functions
It is possible to adjust each of the functions 4, 6 and 10 manually. The display of the "AUTO" function will then go off.
Resumption by the driver of the adjustment of cabin temperatures (for the front and rear passengers)
-A long press on this button will realign the tem-peratures for all passengers with the preferences of the driver.
A. DRIVER’S CONTROL PANEL

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2 - Adjustment of temperature
The system can regulate temperature on an indepen-dent basis for the left hand side and right hand side as well as for the rear of the passenger compartment. Front and rear passengers can thus adjust their own temperatures.
To display the desired temperature, press button :
- – to decrease the temperature,
- + to increase the temperature.
An adjustment around 21 will provide an agreeable temperature level. However, depending on your prefe-rence, anything between 18 and 24 is quite normal.
For optimum comfort, it is recommended to avoid an adjustment difference greater than 3 between right and left.
Note : Actual temperatures experienced in the passenger compartment are dependent on external factors and for this reason might not be identical to those displayed.
On entering the vehicle, the inside temperature may be much colder (or hotter) than would be comfortable. It serves no purpose to alter the temperature displayed in an attempt to attain your preference more rapidly. The system automatically does all in its power to make up the difference in temperature as soon as possible.
A U T O M A T I C A I R C O N D I T I O N I N G
3 - Adjustment of the air blower speed
The air blower operates only when the engine is run ning (except when the REST function is activated).
To adjust the fl ow of air, press on the button :
to increase the air fl ow
to decrease the air fl ow (this button also has the REST function)
The level of air fl ow is indicated on the display by the progressive fi lling of the ventilator blades.
Note : If you place the air blower on position 0, the system is deactivated. The air blower display will be empty, with the indication OFF.
Function for retaining ventilation with the engine switched off
The REST function is available when you switch on the ignition and when you stop the engine.
This function allows you to retain ventilation in the passenger compartment for a few minutes, even with the engine stopped.
When you leave the vehicle, any passengers present can still have the benefi t of air circulation, even though the engine is not running.

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A U T O M A T I C A I R C O N D I T I O N I N G
(Function for retaining ventilation with the engine switched off : REST function, continued…)
Engine stopped, ignition switched on :- The displays will light up, with the air blower shown empty as long as the function is available.- A press on the REST button activates the function for a timing of just a few minutes. Two blades of the blower will fi ll to signify that the function is active.- It can be deactivated and reactivated during the timing.- At the end of the timing, the display will go off.
On stopping the engine :- The displays remain lit up, the blower is shown em pty and the function can be activated for 30 seconds.- A press on the REST button during the next 30 sec-onds activates the function for a timing of several min-utes. The duration and availability of the function are variable according to the state of charge of the battery (a protection to guarantee engine starting). Two blower blades fi ll up to signify that the function is active. It re-mains active, even after the doors have been locked , until the end of the timing.- A further press before the end of the timing defi nitively stops the function.
Note : This button does not activate the air conditioning, only the air blowers. In the REST function, the air fl ow and distribution are controlled automatically and you c annot modify them.
4 - Adjustment of the air distribution- Press on button 4 so that the air fl ows scroll succes-sively on the display.
5 - Air recirculation
This button activates the recirculation of air within the passenger compartment and also has an automatic function.
The air distribution you have chosen is con-fi rmed by the lighting of the corresponding warning lamps in the display.
There are 7 possible adjustments.
Entry of air in automatic mode (activated by default, in automatic comfort regulation)
Automatic mode makes use of an air quality sensor. This analyses the air and isolates the passenger com-partment from the exterior as soon as it detects the presence of pollutants. Then it automatically activates recirculation of cabin air.
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Closing of the air inlet
- Press on button 5 to close off the entry of air from outside.2
Whilst retaining the other adjustments, this position enables the driver at any time to exclude any disa-greeable odours or fumes coming from outside the vehicle.
It should be cancelled as soon as possible to permit renewal of cabin air and to prevent misting.
- Press once on button 5 to return to the initial status (entry of air in automatic mode).
Note : The airrecirculation can also be accessed by means of a press on the control located low down to one side of the steering wheel (see “Fixed centred controls steering wheel").
Entry of air (manual mode)
- Press on button 5 to activate entry of air from the outside. The warning lamp goes out. 3

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A U T O M A T I C A I R C O N D I T I O N I N G
6 - Adjustment mode for the rear passengers8 - Deicing / demisting of the rear screen
This can only operate when the engine is running.
- Press on button 8 to activate/deactivate the electric deicing of the rear screen and, according to version, of the exterior rear view mirrors. The warning lamp lights up and the symbol appears on the display.
It switches off automatically to prevent excessive con-sumption of power
9 - Rapid deicing / demisting of the front and rear windows
- Press on button 9. The warning lamp lights up.
This button decides whether or not the rear passengers may use their adjustment controls.
There are three possible statuses for this button :
Locking of the rear passenger controlsThe driver imposes his adjustment on the rear passengers.
Authorisation of the rear passenger controls
The rear passengers can use their adjustment controls at their conven-ience.
Closing of the air fl ow for the rear passengers
The supply of air is cut off.
7 - Panel display mode : black panel function
This function turns the displays and panel backlighting on or off.
- Function activated, a press on any button will light up the screen temporarily.
- A press on button 7 deactivates the function, lighting of buttons and screen is again permanent.
Note : This function optimises notably the visual com-fort for driving at night.
This function gives a rapid deicing / demisting of the vehicle simultaneously with :
- front deicing at optimum temperature,
- optimum air fl ow,
- recirculation prohibition,
- deicing of the rear view mirrors and heated rear screen,
- air conditioning, if necessary.
Press again on button 9 or on " AUTO " to stop the function. Deicing of the rear view mirrors and heated rear screen remains activated.
10 - Air conditioning
- Press on button 10 to activate the air conditioning.
The A/C warning lamp lights up.
With additional air conditioning, in cold weather you are advised to close the supply of air to the rear pas-sengers (no hot air distribution possible via these air vents).

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AUTOMATIC AIR CONDITIONINGA D D I T I O N A L A I R C O N D I T I O N I N GC. REAR PASSENGER CONTROL PANELS
(RIGHT / LEFT)
1. Adjustment of temperature
The rear passengers can adjust their temperature controls independently via buttons + and -.
Note : Their preference cannot be greater than that of the driver by more than 2. The reaching of this maximum preference is confi rmed by th e fl ash-ing of its display.
2. Adjustment of air blower speed
The air blower operates only when the engine is running.
To adjust the fl ow of air, press on button :
to increase the air fl ow
to decrease the air fl ow
The level of air fl ow is indicated on the display by the progressive fi lling of the ventilator blades.
By decreasing the fl ow to zero, you deactivate the air conditio ning system (OFF).
Note : you can adjust the temperature and the air fl ow only if the driver enables you to (see button 6 of the driver’s control panel).
This warning lamp signifi es that the passenger controls are locked, you can adjust neither the temperature nor the air fl ow, which remain aligned on the preferences of the driver.
This warning lamp indicates that the supply of air is cut off.
Additional air conditioning allows you to optimise comfort levels in warm weather conditions. It pro-duces additional fresh air which is supplied using the rear air vents. The supply of warm air via the rear air vents is not possible using this system.
This position is recommended in cold weather conditions, as th e air vents do not supply warm air.

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- Heating /Manual air conditioning
To make the best use of the system, we recommend :
- Automatic air conditioning
With automatic air conditioning, you are recommended to choose AUTO operation.
V E N T I L A T I O N - H E A T I N G -
A I R C O N D I T I O N I N G

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Heated seats
The front seats can be heated independently. Use the controls on the inner sides of the seats and choose one of the three heat intensities below
0 : Off.
1 : Slight heat.
2 : Medium heat.
3 : Strong heat.
The seat temperature will adjust automatically.
Note : the heated seats only func-tion when the engine is running.
Note : The seats can also be adjusted on a temporary basis :
- on opening one of the front doors.
- after switching off the ignition.
Electric adjustments :
Adjustment of seat height and angle, longitudinal adjustment
Adjustment of backrest angle and lumbar support
Raise or lower the front of control 1 to raise or lower the front of the seat base (on driver’s seat).
Raise or lower the rear of control 1 to raise or lower the seat.
Action control 1 forwards or rearwards to slide the seat forwards / backwards.
Push the top of control 2 forwards or rearwards to adjust the backrest angle.
Raise or lower control 2 to increase or decrease the lumbar support.
F R O N T S E A T S E L E C T R I C A D J U S T M E N T S