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!
The standard equipment of all models considered in this Manual provides for the installation of an anti-lock brake system, in addition, depending on the equipment, several more electronic braking control systems can be installed. All systems are closely interconnected and complement each other. The anti-lock brake system (ABS) prevents premature wheel locking during braking by modulating the hydraulic fluid pressure in each of the brake mechanisms. Due to this, braking efficiency increases almost 2 times and the braking distance is reduced. In addition, the absence of complete wheel locking ensures that the car remains controllable. On the Astra-H and Zafira-B models, the ABS integrates emergency braking control and the Cornering Brake Control (CBC) system.
Anti-slip system
(Traction Control System — TCS) 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 wheel slip occurs, the TC 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", Section 16).
The anti-skid system (ESP) along with ABS reduces the risk of uncontrolled skidding, both during vehicle braking and during various maneuvers and turns. ESP works in tandem with the traction control system (TCS). When cornering at high speed or during abrupt vehicle maneuvers, the ESP sensors collect information about the steering wheel angle and the vehicle turning speed. If there is a risk of skidding and the vehicle is unstable, 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 "Control bodies and operating techniques").
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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 driving 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 specifics of driving a car using electronic control systems are given in the Chapter "Controls and operating instructions". The built-in control system disables 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, the shutdown occurs when defects in the chassis and suspension of the car 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. The shutdown is confirmed by the activation of the corresponding indicator on the instrument panel (the activation modes of indicators, control lamps and warning messages are described in the corresponding sections of the Chapter "Controls and operating techniques"). The most common cause of failures is a voltage drop in the vehicle's on-board electrical system or a broken wiring - check the reliability of the wire fastening on the battery terminals, the integrity of the sensor connecting 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 - at the first opportunity, check the condition of the battery 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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