Definitions

Definitions -
These explanations refer only to this assembly group: Brake system. These definitions are not necessarily generally valid.

ABS (Anti-lock brake system)
The anti-lock brake system (ABS) is a regulating system in the brake system which prevents the wheels from locking-up.

ASR (Traction control system)
It prevents the driving wheels from spinning, e.g. on ice or gravel, by intervening in the brakes and the engine control.

Speed sensor
The speed sensor sends the speed signal to the control module.

EDL (Electronic Differential Lock)
The EDL determines the driving torque by electronically switching from the spinning driving wheels to the gripping wheels.

ESP sensor unit
Combined sensor for speed and lateral acceleration.

ESP (Electronic Stabilization Program)
The ESP recognizes critical vehicle conditions and stabilizes the vehicle by braking individual wheels and intervening in the engine management system. This occurs independent of brake or accelerator pedal operations.

On Board Diagnostic (OBD)
The capability of the control module:
- Recognizing malfunctions,
- Reacting to malfunctions,
- To store malfunctions,
- Determining measuring values and displaying them in the measured value block.

Performing On Board Diagnostic (OBD)
Connecting the scan tool to be able to check the Diagnostic Trouble Code (DTC) memory.

Vehicle Diagnosis, Testing and Information System VAS 5051
Terms such as- Tester, scan tool, VAS5051 refers to this device.

Brake pressure sensor
The brake pressure sensors determine the driver's braking and are necessary for regulating the pre-boost pressure.

Sender for Rotation Rate
The sender for rotation rate registers the rotational behavior of the vehicle along its vertical axis in relation to the vehicle speed. There is an ESP intervention for rotational movements greater than 40 per second.

Steering angle sensor
The steering angle sensor sits on the steering column between the steering column switches and the steering wheel. It transmits the steering angle to the electronic control module. It detects 720 degrees and therefore two full turns of the steering wheel.

Sensor for transverse acceleration
Used to register the speed through bends/curves and on which side the ESP system should brake.

Guided fault finding
One of the VAS5051's three operating modes. The other two are "Vehicle self-diagnosis" and "Test instruments".

Initiating basic setting
The values learn in the control module are turned back to the initial values.

Pr.-nr.
Abbreviation for production-control-number. They display optional equipment, variations in models for different countries and suspension information, among other things.

Rep.-Gr.
Abbreviation for repair group

VAS5051
^ Vehicle Diagnosis, Testing and Information System VAS 5051