2011.5 Citroen DS4 RHD check engine

The system is reactivated automaticallyat every new star t using the key.
Reactivation

This system requires a specific battery with aspecial specification and technology (reference numbers available from a CITROËN dealer or
a qualified workshop).
Fitting a battery not listed by CITROËN
introduces the risk of malfunction of the system. In the event of a malfunction with the s
ystem,
the "ECO OFF"switch warning lamp flashes,
then comes on continuously.
have it checked by a CITROËN dealer or a qualified workshop.


Operating fault
Maintenance

Before doing anything under the bonnet, deactivate the Stop & Start system to avoid any risk of injury resulting from automatic operation of STA R T mode.

The Stop & Star t system makes use of advanced technology. All work on this type of battery must be done only by a CITROËN dealer or a qualifiedworkshop. Pr
ess the "ECO OFF"switch again.
The system is active again; this is confirmed
by the switch warning lamp going off and the
display of a message.
In the event of a fault in STOP mode, thevehicle may stall. All of the instrumentpanel warning lamps come on.Depending on version, an alert message may also be displayed askingyou to put the gear lever into position Nand put your foot on the brake pedal.
It is then necessary to switch off the ignition, then restart the engine using the key.

215
Driving








Blind spot sensors


This driving assistance system warns the driver
of the presence of another vehicle in the blind
spot angle of their vehicle (areas masked from
the driver's field of vision), as soon as this presents a potential danger.

Operation


This system is designed to improve safety when driving and is in no circumstances a substitute for the use of the interior rear view mirror and door mirrors. It is the driver's responsibility to constantly check the traffic, to asses the distances and relative speeds of other vehicles and to predict their movements before deciding whether to change lane.
The blind spot sensor system can never replace the vigilance and responsibility of the driver.

)
On switching on the ignition, or engine
running, press this button to activate the
function; the warning lamp comes on.
Sensors fitted in the front and rear bumpers
monitor the blind spots. A warnin
g lamp appears in the door mirror on
the side in question:
- immediatel
y, when being overtaken,
- after a delay of about one second, when
over taking a vehicle slowly.

231Checks











Bonnet


Opening
)Open the front left door.)Pull the interior bonnet release lever A ,
located at the bottom of the door aperture.
) Push the exterior safety catch Bto the leftand raise the bonnet.
)
Unclip the stay C
from its housing on the back of the bonnet. )
Fix the stay in the notch to hold the bonnet open.


The location of the interior bonnet release lever prevents opening of the bonnet while the front left door isclosed.


Do not open the bonnet in high winds. When the engine is hot, handle theexterior safety catch and the bonnet
stay with care (risk of burns).
Before doing anything under the bonnet, switch off the Stop & Startsystem to avoid any risk of injury
resulting from an automatic change toSTA R T m o d e .


Closing
)
Take the stay out of the support notch. )
Clip the stay in its housing on the back of
the bonnet.) Lower the bonnet and release it at the endof its travel. )
Pull on the bonnet to check that it is secured correctly.

233Checks














Petrol engines

The various caps and covers allow access for
checking the levels of the various fluids and for
replacing cer tain components.
1. Power steering reservoir.2.Screenwash and headlamp wash reservoir.3.Coolant reservoir.4.
Brake fluid reservoir.
5. Battery/Fuses.
6.Fusebox.
7. Air filter.8.Engine oil dipstick.9.
Engine oil filler cap.

Diesel engines
The various caps and covers allow access for
checking the levels of the various fluids, for replacing cer tain components and for primingthe fuel system.
1.
Power steering reservoir.2.
Screenwash and headlamp wash reservoir.3.
Coolant reser voir. 4.
Brake fluid reservoir.5.
Battery/Fuses.
6.Fusebox.7. Air filter.8.Engine oil dipstick. 9.
Engine oil filler cap.10.Priming pump *
. 11.
Bleed screw *
.
*
Accordin
g to engine.

235
Checks

























Checking levels
Check all of these levels regularly and top them up if necessary, unless other wise indicated.
If a level drops si
gnificantly, have the corresponding system checked by a CITROËN dealer or a qualified workshop.


Oil level
Engine oil change
Refer to the servicing booklet for the inter val
for this operation.
In order to maintain the reliabilit
y of the engine and emission control system, the use of additives in the engine oil is prohibited.
Oil specifi cation
The oil must correspond to your engineand conform to the manufacturer'srecommendations.



Brake fluid level


Changing the fl uid

Refer to the servicing booklet for the inter valfor this operation.


Fluid specifi cation

The brake fluid must conform to themanufacturer's recommendations and meet
the DOT4 s t a n d a r d . Th
e brake fluid level should be closeto the "MA X" mark. If it is not, check
the brake pad wear.
The readin
g will only be correct if the
vehicle is on level ground and the engine has been off for more than 30 minutes.
The check is carried out either when theignition is switched on using the oil level
indicator in the instrument panel, or usingthe dipstick.
When working under the bonnet, take care, as cer tain areas of the engine may be extremely hot (risk of burns).
It is normal to top up the oil level
between two services. CITROËN recommends that you check the oillevel, and top up if necessary, every 3 000 miles (5 000 kilometres).

Changing the coolant
The coolant does not have to be changed.


Coolant specifi cation

The coolant must conform to the
manufacturer's recommendations.

Coolant level
The coolant level should be close
to the "MA X" mark but should never exceed it. When the engine is warm, the
temperature of the coolant is regulated by the fan. This can operate with the ignition off.
On vehicles which are fitted with a par ticle
emission filter, the fan may operate after
the vehicle has been switched off, even if
the en
gine is cold.
In addition, as the cooling system is pressurised,
wait at least one hour after switching off the engine before carrying out any work.
To a v o i d a ny risk of scalding, unscrew the cap by two turns to allow the pressure to drop. When the pressure has dropped, remove the cap and top up the level.
Power steering fluid level
The power steering fluid level should
be close to the "MA X" mark. Unscrew
the cap, with the engine cold,
to check the level. To check the level or top up the
fluid on vehicle fitted with headlamp
washers
, immobilise the vehicle and switch of the engine.

Screenwash/headlamp wash
level

Checks


Air filter and passenger compartment filter


Oil filter
Unless other wise indicated, check these components in accordance with the ser vicing booklet and according to your engine.
Other wise, have them checked b
y a CITROËN dealer or a qualified workshop.
The batter
y does not require anymaintenance.
However, check that the terminals
are clean and correctl
y 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 itsreconnection. Re
fer to the ser vicing booklet 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 necessary(refer to the "Engines" section). y A clogged passenger compar tment filter mayhave an adverse effect on the performance
of the air conditioning system and generate undesirable odours.
Re
place the oil filter each timethe engine oil is changed.
Refer to the ser vicing booklet for
details of the replacement inter val for
this component.
The presence of this label, in particular with the Stop & Star t system, indicates the use of a specific 12 V lead-acid battery with special technology and specification. The involvement of a CITROËN dealer or a qualified workshop is essential when replacingor disconnecting the battery.