traction control Citroen DS4 DAG 2010.5 1.G Owner's Manual

Warning lampis onCauseAction/Obser vations
Anti-lock Braking System (ABS) fixed. The anti-lock braking system has a fault. The vehicle retains conventional braking. Drive carefully at reduced speed and contact a CITROËN dealer or a qualified workshop without delay.
Dynamic stability control (ESP/ASR)
flashing. The ESP/ASR regulation is active. The system optimises traction and improves the directional stability of the vehicle.
fixed. Unless it has been deactivated (button pressed and its indicator lamp on), the ESP/ASR or hill star t assist system has a fault.
Have it checked by a CITROËN dealer or a qualified workshop.
Low fuel level fixed with the two last bars flashing. When it first comes on there remains approximately 6 litres of fuel in the tank.
You must refuel as soon as possible to avoid running out of fuel. This warning lamp will come on every time the ignition is switched on, until a sufficient addition of fuel is made. Fuel tank capacity: approximately 60 litres. Never continue to drive until you run out of fuel a s this could damage the emission control and injection systems.
Engine autodiagnosis system
fixed. The emission control system has a fault. The warning lamp should go off when the engine is started. If it does not go off, contact a CITROËN dealer or qualified workshop without delay.
flashing. The engine management system has a fault. Risk of destruction of the catalytic conver ter. Have it checked by 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.