General information
Attention: Attempts to independently interfere with the functioning of electronic systems, as well as their repair, are guaranteed to lead to system failure! All maintenance and repair work must be performed only at branded service stations, by personnel specially trained for this purpose, using the appropriate adjustment and diagnostic equipment!
Depending on the configuration, the vehicle may be equipped with various electronic braking control systems. All systems are closely interconnected and complement each other.
Anti-lock brake system (ABS) prevents premature wheel locking during braking by modulating the hydraulic fluid pressure in each of the brake mechanisms. This increases braking efficiency almost twofold and reduces the braking distance. In addition, the absence of complete wheel locking ensures that the vehicle remains controllable. On Corsa C/Meriva models, emergency braking control functions are integrated into the ABS.
Electronic Brakeforce Distribution (EBD) controls the braking force on the rear axle and, depending on the axle load, changes the pressure in the brake circuits.
Anti-slip system (Traction Control - TC) prevents the drive wheels from slipping when the gas pedal is pressed sharply, for example, when driving on a road with a wet surface. If the wheels slip, the vehicle system forcibly reduces engine power and, if necessary, brakes the corresponding wheel - at the same time, the indicator of deterioration of the traction properties of the road surface is activated on the instrument panel (see Chapter "Controls and operating techniques").
Electronic Stability Program (ESP) along with ABS reduces the risk of uncontrolled skidding, both during vehicle braking and during various maneuvers and turns. ESP operates in tandem with the traction control system (TC). When cornering at high speed or during abrupt vehicle maneuvers, the ESP sensors collect information about the steering wheel angle and vehicle turning speed. In the event of a risk of skidding and an unstable vehicle position, the optimal driving mode is selected by braking individual wheels and adjusting engine power, and the vehicle is stabilized while moving along the selected trajectory - the corresponding indicator is activated on the instrument panel (see Chapter "Controls and operating techniques").
Warning: Electronic systems improve the vehicle's handling and braking properties, but will not prevent collisions due to careless and dangerous driving! Do not rely on auxiliary systems for careless driving - the driver is fully responsible for traffic safety!
Instructions for operation of vehicles equipped with electronic systems
Attention: Before carrying out electric welding work, it is necessary to disconnect the electrical wiring connector from the electronic systems control unit - disconnection should be done only with the ignition off! Be careful when performing body painting work - even short-term heating of the control unit above +80°C will lead to its failure!
The features of driving a car using electronic control systems are given in Chapter "Controls and operating principles".
The built-in control system switches off the electronic braking control if any defect or malfunction occurs in the electrical circuits (for example, a cable break) or if the supply voltage is too low (battery voltage below 10V). In some cases, disabling occurs when defects in the chassis and suspension of the vehicle are detected that affect the correct operation of the braking system. When the electronic control systems are disabled, the service braking system continues to function in the normal mode. Disabling is confirmed by activating the corresponding indicator on the instrument panel (the activation modes of indicators and control lamps are described in Section 16 of Chapter "Controls and operating techniques").
The most common cause of failures is a voltage drop in the vehicle's electrical system or a broken wire - check the reliability of the wire fastening on the battery terminals, the integrity of the sensor connection lines. If the lamps light up at the start of movement and go out again after a while, this indicates that the battery voltage was initially too low, and then increased as a result of charging when the generator was running - check the battery condition at the first opportunity and recharge it in stationary conditions.
All other checks of electronic systems must be carried out at a service station using diagnostic equipment.
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