2009.5 Citroen DS3 air filter

Ventilation
Air intake
The air circulating in the passenger compartment is filtered and originates either from the outside via the grille located at the base of the windscreen or from the inside in air recirculation mode.
Air treatment
The incoming air follows various routes depending on the controls selected by the driver: - direct arrival in the passenger compar tment (air intake), - passage through a heating circuit (heating), - passage through a cooling circuit (air conditioning). The temperature control enables you to obtain the level of comfor t required by mixing the air of the various circuits. The air distribution control enables you to diffuse the air in the passenger compar tment combining several air vents. The air flow control enables you to increase or reduce the speed of the ventilation blower.
Control panel
The controls of this system are grouped together on control panel A on the centre console. Depending on the model, the functions offered are: - the level of comfor t required, - air flow, - air distribution, - demisting-defrosting, - manual or digital air conditioning controls.
Air distribution
1. Windscreen demisting-defrosting vents. 2. Front side window demisting-defrosting vents. 3. Side adjustable air vents. 4. Central adjustable air vents. 5. Air outlets to the front footwells. 6. Air outlets to the rear footwells.

59Comfort
Recommendations for ventilation and air co nditioning
If after an extended stop in sunshine, the interior temperature is very high, first ventilate the passenger compar tment for a few moments.
Put the air flow control at a setting high enough to quickly change the air in the passenger compar tment. The air conditioning system does not contain chlorine and does not present any danger to the ozone layer.
In order for these systems to be fully effective, follow the operation and maintenance guidelines below:  To obtain an even air distribution, take care not to obstruct the exterior air intake grilles located at the base of the windscreen, the nozzles, the vents and the air outlets, as well as the air extractor located in the boot.  Do not cover the sunshine sensor, located on the d ashboard; this is used for regulation of the air conditioning system.  Operate the air conditioning system for at least 5 to 10 minutes, once or twice a month to keep it in per fect working order.  Ensure that the passenger compar tment filter is in g ood condition and have the filter elements replaced regularly (refer to the "Checks" secti on). We recommend the use of a combined passenger compa r tment filter. Thanks to its special active additive, it contributes to the purification of the air breathed by the occupants and the cleanliness of the passenger compar t ment (reduction of allergic symptoms, bad odours and greasy deposits).  To guarantee correct operation of the air conditioning system, you are also advised to have it checked regularly as recommended in the Maint enance and Warranty Guide.
 If the system does not produce cold air, deactivate it and contact a CITROËN dealer. When towing the maximum load on a steep gradient in high temperatures, switching off the air conditioning increases the available engine power and so improves the towing ability.
The condensation created by the air conditioning results in a discharge of water under the vehicle which is per fectly normal.

167Checks
* According to engine.
Petrol engines
1. Screenwash reser voir. 2. Coolant header tank. 3. Air filter * .
4. Brake fluid reser voir. 5. Battery. 6. Fusebox. 7. Engine oil dipstick. 8. Engine oil filler cap.

* According to engine.
Diesel engines
1. Screenwash reser voir. 2. Coolant header tank. 3. Air filter * .
4. Brake fluid reser voir. 5. Battery. 6. Fusebox. 7. Engine oil dipstick. 8. Engine oil filler cap. 9. Priming pump * .

Checks
Battery
Air filter and passenger compartment filter
Oil filter
Particle emission filter
(Diesel)
It is imperative that the maintenance of the par ticle emission filter is carried out by a CITROËN dealer.
Following prolonged operation of the vehicle at very low speed or at idle, you may, in exceptional circumstances, notice the emission of water vapour at
the exhaust on acceleration. This does not affect the behaviour of the vehicle or the environment.
Unless other wise indicated, check these components in accordance with the Maintenance and Waranty Guide a nd according to your engine. Other wise, have them checked by a CITROËN dealer.
The battery does not require any maintenance. However, check that the terminals are clean and correctly tightened, particularly in summer and winter. When carrying out work on the battery, refer to the "Practical information" section for details of the precautions to be taken before disconnecting the battery and following its reconnection.
Refer to the Maintenance and Warranty Guide for details of the replacement inter vals for these components. Depending on the environment (e.g. dusty atmosphere) and the use of the vehicle (e.g. city driving), replace them twice as often if necessar y (refer to the "Engines" paragraph). A clogged passenger compar tment filter may have an adverse effect on the per formance of the air conditioning system and generate undesirable odours.
Replace the oil filter each time the engine oil is changed. Refer to the Maintenance and Warranty Guide for details of the replacement interval for this component.

195Practical information
Dashboard fusebox
The fusebox is loacted inside the glove box.
Access to the fuses
 Refer to the paragraph "Access to the tools".
Fuse tables
Fuse N°RatingFunctions
FH365 A Trailer relay unit.
FH37- Not used.
FH3820 A Hi-Fi amplifier.
FH39- Not used.
FH4030 A Trailer relay unit.
RatingFunctions
F115 A Rear wiper.
F2- Not used.
F35 A Airbags and pretensioners control unit.
F410 A
Air conditioning, clutch switch, electrochromatic mirror,
par ticle filter pump (Diesel), diagnostic socket, airflow sensor (Diesel).
F530 A Electric windows panel, passenger’s electric window co ntrol,
front electric window motor.
F630 A Driver’s electric window motor.
F75 A Cour tesy lamp.

Fuse table
Fuse N°RatingFunctions
F120 A Engine control unit supply, cooling fan unit control relay, multifunction engine control main relay, injection pump (Diesel).
F215 A Horn.
F310 A Front /rear wash-wipe.
F420 A LED lamps.
F515 A Diesel heater (Diesel), par ticle filter additive pum p (Diesel), air flow sensor (Diesel), blow-by heater and electroval ves (VTi).
F610 A ABS/ESP control unit, secondary stop switch.
F710 A Electric power steering, automatic gearbox.
F825 A Star ter control.
F910 A Switching and protection unit (Diesel).
F1030 A Fuel heater (Diesel), blow-by heater (Diesel), fuel pump (VTi), injectors and ignition coils (petrol).
F1140 A Heater blower.