BARSOM AUTOMOTIVE
Whittier CA        (562) 945-2658

Traction Control  and ABS

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If the brake pedal is depressed suddenly, the ABS controls the hydraulic pressure of the wheel cylinders for all the four wheels to automatically avoid wheel locking and ensure the directional and steering stability of the vehicle.

If the brake pedal is depressed suddenly, the ABS & TRAC & VSC ECU controls the solenoids in the actuators using the signals from the sensors to move the brake fluid to the reservoir in order to release the braking pressure applied to the wheel cylinder. If the ABS & TRAC & VSC ECU detects that the fluid pressure in the wheel cylinder is insufficient, the ECU controls the solenoids in the actuators to increase the braking pressure.

The traction control system controls the engine torque, the hydraulic pressure of the driving wheel cylinders, slipping of the wheels which may occur at start or acceleration of the vehicle, to ensure an optimal driving power and vehicle stability corresponding to the road conditions.

Unexpected road conditions, vehicle speed, emergency situation, and any other external factors may cause large under or over steering of the vehicle. If this occurs, the VSC system automatically controls the engine power and wheel brakes to reduce the under or over steering.

To reduce large over steering : If the VSC system determines that the over steering is large, it activates the brakes for the outer turning wheels depending on the degree of the over steering to produce the moment toward the outside of the vehicle and reduce the over steering.

To reduce large under steering : If the VSC system determines that the under steering is large, it controls the engine power and activates the rear wheel brakes to reduce the under steering.

The VSC OFF SW is used to stop the VSC function. After the engine is started, the VSC system is stopped (Turned off) and the VSC OFF indicator light lights up. When the VSC OFF SW is pressed again, the VSC system enters the stand by mode. If the engine is stopped and restarted, the VSC system enters the stand by mode regardless of the VSC OFF SW. VSC indicator light If an error occurs in the VSC system, the VSC indicator lights up to warn the driver.

To efficiently operate the VSC system at its optimal level, the VSC system and other control systems are mutually controlled while the VSC system is being operated.

Engine throttle control

The engine power does not interfere with the VSC brake control by controlling the opening of the throttle and reducing the engine output.

Engine control and electronically controlled transmission control

The strong braking force does not interfere with the braking force control of the VSC system by turning off the accel. and reducing changes in the driving torque at shift down.

The slip indicator light flashes and the buzzer sounds intermittently to warn the driver that the current road is slippery, while the VSC system is being operated.

If an error occurs in the ABS & TRAC & VSC ECU, sensor signals, and/or actuators, the ABS & TRAC & VSC ECU inhibits the brake actuator control and inputs the error signal to the engine control module. According to the error signal, the brake actuator turns off the solenoid and the engine control module rejects any electronically controlled throttle open request from the VSC system. As a result, the vehicle functions without the ABS, TRAC, and VSC systems.

 

 

If a malfunction is detected for the system, the warning lamp(s) will illuminate and stays on until the problem gets repaired.

Our facility is equipped to repair the ABS and Traction Control problems of your vehicle.

We will be glad to help you, contact us any time.

 

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