SSANGYONG NEW ACTYON SPORTS 2012 Service Manual

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5. CIRCUIT DIAGRAM OF STOP LAMP

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1. SPECIFICATION
Unit DescriptionSpecification
Remark
ABS ESP
HECU Clock frequency 32MHz 50MHz
Memory 128KB 256KB
S-sensor Operating voltage 4.75~5.25V
None (functions
in sensor cluster)Installed in IP
panel behind
audio (only for
4WD) Operating temperature-30 ~ 85℃
Operating range -1.5 ~ 1.5g
Output voltage 0.5 ~ 4.5V
Wheel
speed
sensorSupplying voltage 4.5 ~ 16V←
Output current (approx. 2.7
km/h of vehicle speed)7mA(Lo) ~ 14mA
+20%←
Operating temperature-40 ~ 150℃ ←
Operating frequency 1~2500Hz←

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2. OPERATING FREQUENCY
1) Hydraulic and Electronic Control Unit (HECU)
Hydraulic and Electronic Control Unit (HECU) 1.
FL wheelRR wheelRL wheel
FR wheel
Master cylinder

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2) ABS System
Sensor - front wheel speed
Sensor - rear wheel speed
Screw (7.8~11.8 Nm)
Clip - cable holder
Clip - sensor cable mounting, rear
Plug - blind
G-sensor
Nut (9.8~10.8 Nm) 1.
2.
3.
4.
5.
6.
9.
11.

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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 ▶
Braking on split road Maneuvering while braking

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Rear wheel speed sensor (4WD)
Located at both ends of rear axle.
Rear discRear caliper assembly (2WD/4WD)
Located on the knuckle.
ABS warning lampG-sensor
Located on the floor under center
fascia.
2. COMPONENT
EBD warning lamp
(two indicators come on)

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Front wheel speed sensor (4WD)
Located on the hub assembly.
Front discFront caliper assembly (2WD/4WD)
Located on the knuckle.
ABS hydraulic device and control unit
Located near the brake booster in engine compartment.

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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 disengaging the connector, the warning lamp comes on.
ABS is not available during lamp ON. In this condition, Only the conventional brake system
without ABS function is available.
When the communication between warning lamp CAN modules in meter cluster is failed,
the warning lamp comes on. A.
B.
C.
D.
E.
ABS warning lamp (2)
Brake warning lamp
(EBD warning lamp: two indicators
come on simultaneously) (1)