ESP (ELECTRONIC STABILITY PROGRAM)
In addition to the TCS / ABS systems, the ESP system, through the steering angle sensor and the pressure sensor, senses the degree of driver's influence on the steering wheel and brake pedal Using information from the G-sensor, wheel speed sensors, etc., the ESP system evaluates the driving mode (understeer or oversteer of the steering wheel) and improves stability by adjusting 4-wheel braking force and engine power output.
When the ESP system is activated, the indicator on the dashboard flashes «SLIP», alerting the driver.
When the ESP system is operating, the body and the brake pedal vibrate slightly and mechanical noise may be heard. This is normal.
When the vehicle is subjected to severe shock or vibration, such as when turning on a turntable, while rolling or pitching on a marine vessel, or on a steep slope with the engine running, the warning light may come on «ABS», indicators «ESP OFF» And «SLIP». In this case, restart the engine on a normal road. If, after restarting, the warning lamp «ABS», indicators «ESP OFF» And «SLIP» turn off, everything is fine.
TCS (TRACTION CONTROL SYSTEM)
The ABS actuator and control unit determines the slip of the drive wheels by comparing the speed signals of all 4 wheels. At the same time, at the command of the control unit, the pressure of the brake fluid supplied to the wheels changes, the fuel supply to the engine is cut off and the throttle opening angle decreases, as a result of which the engine power decreases. In the future, the throttle position is continuously maintained so as to provide the required engine power.
Depending on the road conditions, the driver may feel some inertia of the movement. This does not indicate a malfunction, as optimal tractive effort takes precedence over other functions during TCS operation.
The TCS system may be temporarily activated while driving in areas where the coefficient of friction with the road surface changes, when shifting up / downshifting or depressing the accelerator pedal to the stop.
When the TCS system is activated, the indicator on the instrument panel flashes «SLIP», alerting the driver.
ABS (ANTI-LOCK BRAKE SYSTEM)
Anti-lock braking system (ABS) designed to determine the speed of the wheels during braking. In the event of hard braking, the ABS system prevents the 4 wheels from locking up, improves stability and avoids obstacles.
If a malfunction occurs in the electrical system, emergency mode is activated, the ABS system is deactivated and the warning lamp lights up «ABS».
Diagnosis of the electrical system is provided using the CONSULT-II tester.
When the ABS system is operating, the brake pedal vibrates slightly and a mechanical noise may be heard. This is normal.
When starting the engine or immediately after starting, the brake pedal may vibrate. Motor noise may also be heard from the engine compartment. This is normal and indicates that a health check is in progress.
When driving on uneven, gravel or snowy (fresh deep snow) On roads, the stopping distance may be longer than for vehicles without ABS.
EBD (ELECTRONIC BRAKE DISTRIBUTION)
Electronic brake force distribution (EBD) is designed to detect the slightest slip between the front and rear wheels during braking and improves stability by adjusting brake fluid pressure, which reduces rear wheel spin.
If a malfunction occurs in the electrical system, emergency mode is activated, the EBD and ABS systems are deactivated and the warning lamps come on «ABS» and brake system.
Diagnosis of the electrical system is provided using the CONSULT-II tester.
When the EBD system is operating, the brake pedal vibrates slightly and a mechanical noise may be heard. This is normal.
When starting the engine or immediately after starting, the brake pedal may vibrate. Motor noise may also be heard from the engine compartment. This is normal and indicates that a performance check is in progress.
When driving on uneven, gravel or snowy (fresh deep snow) On roads, braking distances may be longer than for vehicles without EBD.
Emergency mode
ESP/TCS system
If a malfunction occurs in the ESP/TCS system, the indicators will illuminate «ESP OFF» And «SLIP» This disables the ESP/TCS control unit and the control system becomes the same as on models without an ESP/TCS unit. If a malfunction occurs in the ESP/TCS electrical system, the ABS system is controlled normally without the ESP/TCS unit.
Attention: If the emergency mode is activated, perform a self-diagnosis for the ESP/TCS/ABS control system.
ASS SYSTEM, EBD
If a fault occurs in the ABS electrical system, the warning lamp will illuminate «ABS», indicators «ESP OFF» And «SLIP». If a malfunction occurs in the EBD electrical system, the brake system warning lamp, warning lamp «ABS», indicators «ESP OFF» And «SLIP». In this case, the ESP / TCS / ABS control units go into one of the following emergency modes:
- 1. In the event of a failure in the ABS system, only the EBD unit operates. This is the same mode as on models without a TCS/ABS unit.
- 2. If there is a failure in the EBD system, the EBD and ABS units do not work. This is the same mode as on models without TCS/ABS, EBD.
Note: In state 1 above, an ABS self-diagnosis noise may be heard. This is normal as the self-diagnosis is performed when the ignition key is turned to «ON» and when starting the engine for the first time.