2013 SSANGYONG TURISMO ECU

09-234891-01
(2) Hydraulic Circuit of HBA
The above figure shows one front and one rear wheel and the same hydraulic circuit forms as in the
ESP operation. When HECU recognizes that it is an emergency and it is required for hard braking,
depending on the pressure value of the brake pressure sensor and pressure changes caused by the
pressure sensor timing, it operates the pump immediately to apply the brake pressure at the wheels.
Then, the pressure in the pump increases until just before the corresponding wheel gets locked. The
motor still keeps rotating and the outlet valve and the separation valve will stay closed. When the wheel
starts to lock, the HBA function cancels and switches to ABS operation.

09-254891-01
▶DUMP (ESP is working) Mode
The pressure decreases just before the wheel speed drops and the wheels are locked.
The inlet valve closes and the outlet valve opens as in the ESP HECU and the oil is gathered at the
low pressure chamber while no additional oil is being supplied. Then the pump operates to allow fast oil
drainage. The shuttle valve and the separation valve do not operate while decompression.

10-34891-01
1. SYSTEM OVERVIEW
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.
1) Basic Theory of ABS Function
To give you a better understanding of the tasks and functions of ABS, we will first look at the physics
principles.
▶Stopping distance
The stopping distance depends on the vehicle weight and initial speed when braking starts. This also
applies for vehicle with ABS, where ABS always tries to set an optimum brake force on each wheel. As
great forces are exerted between the tires and the carriageway when braking, even with ABS the
wheels may scream and rubber is left on the road. With an ABS skid mark one may be able to clearly
recognize the tire profile. The skid mark of an ABS vehicle does not however leave any hint of the
speed of the vehicle in the case of an accident, as it can only be clearly drawn at the start of braking.
▶Brake force on a wheel
The maximum possible brake force on a wheel depends on the wheel load and the adhesion
coefficient between tire and carriageway. With a low adhesion coefficient the brake force, which can be
obtained is very low. You are bound to know the result already from driving on winter roads. With a
high adhesion coefficient on a dry road, the brake force, which can be obtained, is considerably higher.
The brake force, which can be obtained, can be calculated from below formula:

10-54891-01
Warning Lamps
EBD warning lamp ABS warning lamp
2. COMPONENTS AND LAYOUT
The basic functions of ABS system are same with previous version. However, the wheel speed
sensing type is different from previous version.
For details about the components,
refer to Chapter "ESP".
Front Active Wheel Speed Sensor
4WD 2WD
ABS HECU
Rear Active Wheel
Speed Sensor

10-74891-01
2) EBD (Electronic Brake Force Distribution) System
▶System description
As an add-on logic to the ABS base algorithm, EBD works in a range in which the intervention
thresholds for ABS control are not reached yet.
EBD ensures that the rear wheels are sensitively monitored for slip with respect to the front axle. If slip
is detected, the inlet valves for the rear wheels are switched to pressure hold to prevent a further
increase in pressure at the rear-wheel breaks, thus electronically reproducing
a pressure-reduction function at the rear-wheel brakes.
ABS features an enhanced algorithm which includes control of the brake force distribution between the
front and rear axles. This is called Electronic Brake Distribution. In an unloading car condition the brake
efficiency is comparable to the conventional system but for a fully loaded vehicle the efficiency of the
EBD system is higher due to the better use of rear axle braking capability.
▶Advantages
Elimination of conventional proportioning valve EBD utilizes the existing rear axle wheel speed
sensor to monitor rear wheel slip.
Based on many variables in algorithm a pressure hold, increase and/or decrease pulsetrain may
be triggered at the rear wheels insuring vehicle stability.
Vehicle approaches the ideal brake force distribution (front to rear).
Constant brake force distribution during vehicle lifetime.
EBD function is monitored via ABS safety logic (conventional proportioning valves are not
monitorable). -
-
-
-
-
3) Important Notice
The modulators for production line are not filled with the brake fluid (dry type). But, for after service, they
are filled with the brake fluid (wet type).
Make sure to keep the procedures in service manual when bleeding the air from the brake lines.
Be familiar with the lamp ON conditions to provide the correct information and reliability to customers.
ECU monitors the valve and motor for ABS when the vehicle speed approaches 5 km/h. At this time,
you can hear the clattering noise. 1.
2.
3.

10-10
▶Pressure Decreases in the Circuit when ABS is Operating
Even when the hydraulic pressure on each circuit is stable, the wheel can be locked as the wheel
speed decreases. This is when the ABS ECU detects the wheel speed and the vehicle speed and
gives the optimized braking without locking the wheels. In order to prevent from hydraulic pressure
increases, the inlet valve is closed and the outlet valve is opened. Also, the oil is sent to the low
pressure changer and the wheel speed increases again. The ABS ECU operates the pump to circulate
the oil in the low pressure chamber to the master cylinder. This may make the driver to feel the brake
pedal vibration and some noises.
▶Pressure Increases in the Circuit when ABS is Operating
As the wheel speed increases, the inlet valve opens and the wheel’s pressure increases due to
the master cylinder pressure. The oil in the low pressure chamber circulates to the wheel by the pump
and the wheel speed decreases as the hydraulic pressure at wheel increases. This operation
continues repetitively until there are no signs that the ECU is locking the wheels. When the ABS
hydraulic pressure control takes place, there may be some vibration and noises at the brake pedal.

03-37410-01
1. SPECIFICATION
Item Front SeatRear 1st
Row SeatRear 2nd
Row SeatRear 3rd
Row Seat
Headrest Tilt25°---
Up/down60 mm
(20 mmx3)100 mm
(20 mmx5)120 mm
(20 mmx6)120 mm
(20 mmx6)
SeatReclining80°
(2°x40)76°
(2°x38)76°
(2°x38)-
Folding -105° 105° 103°
Sliding228 mm
(192+36 mm)380 mm
(140+240 mm)340 mm
(100+240 mm)-
Seat warmer - - -
2. WARNINGS FOR POWER SEAT
Adjust the driver's seat before driving.
Make sure that the seat is firmly secured after adjusting.
Never drive the vehicle with the head restraint removed or lowered excessively. Otherwise, your
neck, spine or other parts of the body can be severely injured in the event of an accident.
If you recline the seatback excessively, you could slide under the seat belt and be injured severely
in a collision.
Do not put any object that could damage the seat on the seat.
The front and rear seats are equipped with the heated wire (seat warmer) system. Using the seat
warmer system excessively may cause minor burns. The following occupants should exercise
special care when using the heated wire seat. 1.
2.
3.
4.
5.
6.
Infant, child, old or handicapped person
Person with sensitive skin
Exhausted person
Persons who is drunk or took medicine which causes drowsiness such as sleeping pills, cold
tablets, etc. -
-
-
-
Do not place anything on the seat that insulates against the heat, such as a blanket or cushion.
Make sure that the head restraints are in place and secured properly. Never drive the vehicle with the
head restraint removed.
To minimize the injuries in a collision or an abrupt stop, make sure the seatback is in the upright
position before driving. If the seatback is reclined too much, the occupant could slide under the seat
belt in a collision or an abrupt stop and cannot be protected properly by the airbag system. 7.
8.
9.

03-30
6. CHILD RESTRAINTS AND PREGNANT WOMAN
1) Pregnant Women
We recommend that pregnant women use the seat belts throughout their pregnancy. Keeping the
mother safe is the best way to keep the baby safe.
Infants and tiny children should always be restrained in an infant or child restraint.
Never install a rear-facing child restraint in the front seat with front passenger air bag.
A child in a rear-facing child restraint installed in the front seat can be seriously injured if the front
passenger air bag inflates. Secure a rear-facing child restraint in the rear seat.
A front-facing child restraint should be secured in the rear seat whenever possible. If installed in the
front passenger seat, adjust the seat as far back as it will go.
When installing a child restraint system, follow the instructions provided by the manufacturer.
When your child restraint is not in use, secure it in the vehicle with the seat belt or remove it from
the vehicle.
In a collision an unrestrained child, even a tiny baby, can become a missile inside the vehicle. The
force required to hold even an infant on your lap can become so great that you could not hold the
child, no matter how strong you are.
Do not allow a child in the cargo areas while the vehicle is moving.
If the shoulder belt contacts the face or neck, move the child closer to the center of the vehicle.
Never allow a child to put the shoulder belt under an arm or behind their back.
Please note that the three point seat belt is designed for a person who is taller than 140 cm. -
-
-
-
-
-
-
-
-
-
2) Child Restraints
When transporting infants or small children, an appropriate child restraint system should always be
used. The child restraint system should be appropriate for your child’s weight and height and
properly fit the car’s seat. Accident statistics indicate that children are safer when properly
restrained in the rear seat rather than in the front seat.
3) Securing Methods of Child Restraint System
Child restraint systems are designed to be secured in vehicle seats by seat belts or the latch system
(ISOFIX seat - if equipped).
Pregnant women should wear 3-point seat belt whenever possible according to the professional
recommendations by her doctor.
Pregnant women should wear the lap portion of the belt across the thighs and as snugly and low
as possible. -
-