navigation RENAULT TWINGO RS 2009 2.G Chasiss ESP Workshop Manual

38C-12V3 MR-413-X44-38C050$040.mif
38C
Bosch 8.1 ESP
Vdiag No.: 05
EBD (electronic braking distribution):
The electronic braking distribution unit optimises the brakeforce distribution between the front and rear axles.
This function ensures vehicle stability under braking.
ABS (anti-lock braking system):
The ABS prevents the wheels from locking when braking. This function allows the vehicle to be steered under
braking and ensures vehicle stability under braking.
MSR (engine torque control):
This is a function that enhances the ABS function. Its purpose is to prevent the drive wheels from spinning
excessively when lifting off the accelerator or changing down a gear on a low grip surface, by requesting the engine
management to regulate the driving torque of the engine (resisting torque compensation) to "relaunch" the wheels.
ASR (wheel traction control):
This function keeps the drive wheels from slipping during starting or acceleration.
The system brakes the wheel in a slippage situation to maintain full traction.
ESP: Electronic stability program:
The ESP guarantees within physical limits the dynamic stability of the vehicle by checking and correcting oversteer.
In any case, the ESP system does not intervene in place of the driver. Using data from the steering wheel, it merely
makes vehicle handling truer to the driver's intention.
CDC (Dynamic Driving Control):
The Dynamic Driving Control guarantees vehicle steerability within physical limits by checking and correcting
understeer.
The Dynamic Driving Control is an advancement of the ESP system and has same objective: to maintain vehicle
control in all operating situations.
The ESP computer supplies the other computers with information on the vehicle speed via a wire connection for the
radio, the power-assisted steering and the electric sunroof, and via the multiplex network for the other computers.
The ESP computer also supplies the multiplex network with the odometry for the instrument panel and navigation
system.
If heavy braking produces very rapid deceleration, the ESP computer issues a request to the UCH (passenger
compartment connection unit) via the multiplex network asking it to switch on the hazard warning lights (depending
on the law in the relevant country).
ANTI-LOCK BRAKING SYSTEM
Fault finding – Features