SsangYong Korando III (2010 year). Service manual - part 546

11-4

ABS / ESP

CBS

Circuit diagram of wheel speed sensor

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4890-00

1. SYSTEM OVERVIEW

1) What is ABS?

When braking suddenly or braking on slippery roads, the vehicle keeps moving forward but the wheels 

are locking and not rotating. If these happen, the vehicle may lose stability or rotate resulting in an 

accident. ABS helps to maintain directional stability and control of the vehicle. ABS is designed to 

secure more safety and increase the control of steering wheel during emergency braking situation. But, 

ABS does not guarantee perfect safety beyond its physical limit. ABS in this vehicle contains EBD 

function. In normal driving conditions, the brake system operates without ABS function.

2) What is EBD (Electronic Brake-force Distribution)?

EBD is an automobile brake technology that automatically varies the amount of force applied to each of a 

vehicle's brakes, based on road conditions, speed, loading, etc. Always coupled with anti-lock braking 

systems, EBD can apply more or less braking pressure to each wheel in order to maximize stopping 

power whilst maintaining vehicular control. EBD does not operate when ABS is working.

ABS effect according to braking conditions

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Braking on split road

Maneuvering while braking

11-6

3. G-sensor (for 4WD)

Located on the floor under 
parking brake bracket in center 
console.

4. Rear wheel speed sensor 

(for 2WD)

Located on knuckle. The 
appearance is different from that 
for 4WD.

4. Wheel speed sensor

(for 4WD)

Located on knuckle. The 
appearance of front sensor is 
same with rear sensor.

2. ABS warning lamp

EBD warning lamp (ABS warning lamp + 
Brake warning lamp)

1. ABS hydraulic device and control unit

Located under the power steering fluid reservoir and 
contains the pressure sensor.

2. COMPONENT

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4890-00

4WD - Front/Rear wheel speed 

sensor

2WD - Front wheel speed sensor

2WD - Rear wheel speed sensor

ECU (Electronic Control Unit)

1.

ECU calculates the wheel speed, acceleration and 

deceleration with the information from wheel 

speed sensor, and determines the wheel slip to 

control the valve and motor.

HU (Hydraulic Unit)

2.

The hydraulic circuit contains the primary circuit 

and secondary circuit for ABS operation. This unit 

controls the hydraulic pressure to each wheel. If 

the system needs ABS operation, the valves in 

the unit operate to control HOLD, RISE and 

DUMP according to ECU control logic.

Motor

3.

The motor is operated when ABS is activated. The 

cam-shaped output shaft of the motor enables the 

brake system to receive and supply the brake fluid 

during the motor operation.

Wheel speed sensor

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Wheel speed sensor sends the data detected by 

tone wheel to HECU.

HECU

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Rear wheel speed sensor in 2WD vehicle is 

different from that in 4WD vehicle.

Location of rear tone wheel (A) and wheel 

sensor (B) in 2WD vehicle