SsangYong Korando III (2010 year). Manual — part 547

11-8

G-sensor (only for 4WD)

▶

For the vehicle with the ABS, a speed difference

between the wheels is not noticeable as all the

wheels are slipping during abrupt braking.

Therefore, the vehicle needs the speed

information from other sensors other than the

wheel speed sensor. On the 2WD vehicle, there

is not large difference between the vehicle speed

reduction and actual wheel speed reduction in

the event of braking since the driving wheels are

in the front. So, the ABS HECU can control the

vehicle, based on a calculation value. But, on the

4WD vehicle, if a speed reduction occurs in the

front or rear of the vehicle, it affects the other side

wheel. In other words, braking the rear wheels

induces also a large speed reduction in the front

wheels. The longitudinal acceleration sensor is

used for this case. It controls the ABS by using

the signals from the sensor during abrupt braking

and acceleration.

G-sensor

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3. ABS CONTROL LOGIC

The principal ABS control logic is the determination of the reference speed by choosing one wheel

meeting a certain condition, while sensing the speed information from 4 wheel speed sensors when the

vehicle is being driven.

For example, when the comparison of the reference speed with front right wheel speed shows a slip, the

control signal is determined according to whether it's deceleration or acceleration. If the control

conditions are met, the brake for the front right wheel will be got under control.

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4. WARNING LAMPS

1) ABS Warning Lamp

ABS warning lamp module indicates the self diagnosis and malfunction.

ABS warning lamp ON:

When turning the ignition switch to ON position, ABS warning lamp comes on for 3 seconds for self-

diagnosis and goes off if the system is OK (initialization mode).

When the system is defective, the warning lamp comes on.

When the self-diagnosis is performing, the warning lamp comes on.

When the HECU connector is disconnected, the warning lamp comes on.

ABS is not available during lamp ON. In this condition, Only normal brake system without ABS function

is available.

When the communication between warning lamp CAN module in meter cluster, the warning lamp

comes on.

1.

2.

3.

4.

5.

6.

ABS warning lamp

Brake warning lamp

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

1.

2.

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2) EBD (Electronic Brake-force Distribution) Warning Lamp (Brake
Warning Lamp)

EBD warning lamp when the system performs the self diagnosis and when it detects the malfunction of

EBD system. However, the brake warning lamp comes on regardless of EBD when the parking brake is

applied.

EBD warning lamp ON:

When turning the ignition switch to ON position, ABS warning lamp and the brake warning lamp

comes on for 3 seconds for self diagnosis and goes off if the system is OK (initialization mode).

When applying the parking brake, the brake warning lamp comes on.

When the brake fluid is not sufficient, the brake warning lamp comes on.

When the self-diagnosis is performing, the warning lamp comes on.

When the HECU connector is disconnected, the warning lamp comes on.

When the system is defective, ABS warning lamp and the brake warning lamp come on

simultaneously.

1.

2.

3.

4.

5.

6.

When the solenoid valve is defective

When one or more wheel sensors are defective

When ABS HECU is defective

When the voltage is abnormal

When valve relay is defective

a.

b.

c.

d.

e.

When the communication between warning lamp CAN module in meter cluster, the warning lamp

comes on.

7.