2010.5 Citroen DS4 DAG Brake

41Monitoring
Warning lampis onCauseAction/Obser vations
Batter y charge fixed. The battery charging circuit has a fault (dir ty or loose terminals, slack or cut alternator belt, ...).
The warning lamp should go off when the engine is star ted. If it does not go off, contact a CITROËN dealer or a qualified workshop.
Braking
fixed, associated with the STOP warning lamp.
The braking system fluid level has dropped significantly. You must stop as soon as it is safe to do so. Top up with brake fluid recommended by CITROËN. If the problem persists, have the system checked by a CITROËN dealer or a qualified workshop.
+
fixed, associated with the electric parking brake fault warning lamp, if the parking brake is released.
The braking system has a fault. You must stop as soon as it is safe to do so. Park, switch off the ignition and contact a CITROËN dealer or a qualified workshop.
+
fixed, associated with the STOP and ABS warning lamps.
The electronic brake force distribution (EBFD) system has a fault. You must stop as soon as it is safe to do so. Have it checked by a CITROËN dealer or a qualified workshop.

Warning lampis onCauseAction/Obser vations
Electric parking brake flashing. The application or release of the electric parking brake was interrupted. You must stop as soon as it is safe to do so. Park on level ground, switch off the ignition and contact a CITROËN dealer or a qualified workshop.
+
Electric parking brake fault fixed. The electric parking brake has a fault. Automatic application/release is no longer possible. Contact a CITROËN dealer or a qualified workshop without delay. The parking brake can be released manually using th e emergency release procedure. For more information on the electric parking brake, refer to the "Driving" section.
Door(s) open
fixed if the speed is below 6 mph (10 km/h).
A door or the boot is still open. Close the door or boot. fixed and accompanied by an audible signal if the speed is above 6 mph (10 km/h).
* According to country.
Seat belt not fastened/unfastened *
fixed, then flashing, accompanied by an increasing audible signal.
The driver or front passenger has not buckled or has unbuckled their seat belt. Pull on the belt in question and inser t the tongue in the buckle. This warning repeats the seat belt information given by the roof console warning lamps. At least one rear passenger has unbuckled their seat belt.

Monitoring
Power steering fixed. The power steering has a fault. Drive carefully at reduced speed. Have it checked by a CITROËN dealer or a qualified workshop.
Under-inflated tyre fixed. The pressure in one or more wheels is too low. Check the pressure of the tyres as soon as possible. This check should preferably be carried out when the tyres are cold.
Directional headlamps flashing. The directional headlamps system has a fault. Have it checked by a CITROËN dealer or a qualified workshop.
Warning lampis onCauseAction/Obser vations
Foot on the brake pedal
fixed. The brake pedal is not pressed. With the 6 -speed electronic gearbox system, press the brake pedal to star t the engine (lever in position N ). If you wish to release the parking brake without pressing the brake pedal, this warning lamp will remain on.
flashing. With the 6 -speed electronic gearbox system, if you hold the vehicle on an incline using the accelerator for too long, the clutch overheats.
Use the brake pedal and/or the electric parking brak e.
Airbags
temporarily. This lamp comes on for a few seconds when you turn on the ignition, then goes off.
This lamp should go off when the engine is star ted. If it does not go off, contact a CITROËN dealer or a qualified workshop.
fixed. One of the airbag or seat belt pretensioner systems has a fault. Have it checked by a CITROËN dealer or a qualified workshop.

Monitoring
Warning lampis onCauseAction/Obser vations
Parking brake fixed. The parking brake is applied or not properly released. Release the parking brake to switch off the warning lamp, keeping your foot on the brake pedal. Obser ve the safety recommendations. For fur ther information on the parking brake, refer t o the "Driving" section.
Electric parking brake fixed. The electric parking brake is applied. Release the electric parking brake to switch off the warning lamp: with your foot on the brake pedal, pul l the electric brake control. Obser ve the safety recommendations. For more information on the electric parking brake, refer to the "Driving" section.
Deactivation of the automatic functions of the electric parking brake
fixed. The "automatic application" (on switching off the engine) and "automatic release" functions are deactivated or faulty.
Activate the function (according to country) via the vehicle configuration menu or contact a CITROËN dealer or a qualified workshop.
Diesel engine pre-heating fixed. The ignition switch is at the 2nd position (ignition on). Wait until the warning lamp goes off before star tin g. The period of illumination of the warning lamp is determined by the climatic conditions (up to about thi r ty seconds in extreme climatic conditions). If the engine does not star t, switch the ignition off and then on, wait until the warning lamp goes off again, then star t the engine.

Tyre under-infl ation detection
System which automatically and continuously checks the pressure of the tyres while driving. Sensors fitted in each valve trigger a warning in the event of problem (speed above 12 mph (20 km/h)).
Puncture
The tyre under-inflation detection system is an aid to driving which does not replace the need for the driver to be vigilant or to drive responsibly.
Under-infl ated tyre
This warning lamp is displayed on the instrument panel and/or a message appears in the screen, accompanied
by an audible signal, to identify the wheel concerned.
The STOP warning lamp comes on and/or this warning lamp is displayed on the instrument panel, accompanied by
an audible signal and a message in the screen identifying the wheel concerned.
 Stop as soon as it is safe to do so, avoiding any sudden movement of the steering wheel and the brakes.  Repair or change the damaged wheel (punctured or very deflated tyre), and have the tyre pressure checked as soon as possible.
 Check the tyre pressures as soon as possible. This check must be carried out when the tyres are cold.

Braking assistance systems
Group of supplementary systems which help you to obtain optimum braking in complete safety in emergency situations: - anti-lock braking system (ABS), - electronic brake force distribution (EBFD), - emergency braking assistance (EBA).
Anti-lock braking system
and electronic brake force
distribution
Linked systems which improve the stability and manoeuvrability of your vehicle when braking, in par ticular on poor or slippery sur faces.
Activation
The anti-lock braking system comes into operation automatically when there is a risk of wheel lock. Normal operation of the ABS may make itself felt by slight vibration of the brake pedal.
When braking in an emergency, press very firmly without releasing the pressure.
Operating fault
If this warning lamp comes on, together with the STOP and ABSwarning lamps, accompanied by an audible signal and a message in the multifunction screen, it indicates a malfunction of the electronic brake force distribution which could result in loss of control of the vehicle when braking. You must stop as soon as it is safe to do so.
When replacing wheels (tyres and rims), ensure that they conform to the manufacturer's recommendations.
If this warning lamp comes on, accompanied by an audible signal and a message in the multifunction screen, it indicates a malfunction of the anti-lock braking system which could result in loss of control of the vehicle when braking.
In either case, contact a CITROËN dealer or a qualified workshop.

175Safety
Emergency braking assistance
System which, in an emergency, enables you to obtain the optimum braking pressure more quickly, thus reducing the stopping distance.
Activation
It is triggered by the speed at which the brake pedal is pressed. The effect of this is a reduction in the resistance of the pedal and an increase in braking efficiency.
When braking in an emergency, press firmly without releasing the pressure.
Trajectory control systems
Anti-skid regulation (ASR)
and electronic stability
programme (ESP)
The anti-skid regulation (also known as Traction Control) optimises traction to prevent skidding of the wheels, by acting on the brakes of the driving wheels and on the engine. The electronic stability programme acts on the brake of one or more wheels and on the engine to keep the vehicle on the trajectory required by the driver, within the limits of the laws of physics.
Activation
These systems are activated automatically each time the vehicle is star ted. They come into operation in the event of a grip or trajectory problem.
This is indicated by flashing of this warning lamp in the instrument panel.
Snow driving assistance
(Intelligent Traction Control)
Your vehicle has a system to help driving on snow: Intelligent Traction Control. This automatic system continuously checks for situations of difficult sur face adhesion that could make it difficult to move off or make progress on deep fresh snow or compacted snow. In these situations, Intelligent Traction Control takes over from the ASR system, limiting the amount of wheel slip to provide the best traction and trajectory control, even
without snow tyres and with or without chains. In extremely severe conditions (snow on top of ice, sand, deep mud…), it can be useful to
deactivate the ESP/ASR systems to allow a degree of wheel spin and so recover grip.

175Safety
Emergency braking assistance
System which, in an emergency, enables you to obtain the optimum braking pressure more quickly, thus reducing the stopping distance.
Activation
It is triggered by the speed at which the brake pedal is pressed. The effect of this is a reduction in the resistance of the pedal and an increase in braking efficiency.
When braking in an emergency, press firmly without releasing the pressure.
Trajectory control systems
Anti-skid regulation (ASR)
and electronic stability
programme (ESP)
The anti-skid regulation (also known as Traction Control) optimises traction to prevent skidding of the wheels, by acting on the brakes of the driving wheels and on the engine. The electronic stability programme acts on the brake of one or more wheels and on the engine to keep the vehicle on the trajectory required by the driver, within the limits of the laws of physics.
Activation
These systems are activated automatically each time the vehicle is star ted. They come into operation in the event of a grip or trajectory problem.
This is indicated by flashing of this warning lamp in the instrument panel.
Snow driving assistance
(Intelligent Traction Control)
Your vehicle has a system to help driving on snow: Intelligent Traction Control. This automatic system continuously checks for situations of difficult sur face adhesion that could make it difficult to move off or make progress on deep fresh snow or compacted snow. In these situations, Intelligent Traction Control takes over from the ASR system, limiting the amount of wheel slip to provide the best traction and trajectory control, even
without snow tyres and with or without chains. In extremely severe conditions (snow on top of ice, sand, deep mud…), it can be useful to
deactivate the ESP/ASR systems to allow a degree of wheel spin and so recover grip.