ECU SSANGYONG NEW ACTYON SPORTS 2012 Manual Online

11-16
4) HBA (Hydraulic Brake Assist System)
(1) Purpose
HBA (Hydraulic Brake Assist) system helps in an emergency braking situation when the driver
applies the brake fast, but not with sufficient pressure, which leads to dangerously long braking
distance. ECU recognizes the attempt at full braking and transmits the signal calling for full brake
pressure from the hydraulic booster. An inexperienced, elderly or physically weak driver may suffer
from the accident by not fully pressing the brake pedal when hard braking is required under
emergency. The HBA System increases the braking force under urgent situations to enhance the
inputted braking force from the driver. Based on the fact that some drivers depress the brake
pedal too soft even under when hard braking is necessary, the HECU system is a safety
supplementary system that builds high braking force during initial braking according to pressure
value of the brake pressure sensor and the pressure changes of the pressure sensor intervals.
When the system is designed to apply high braking force when brake pedal is depressed softly by
an elderly or physically weak driver, the vehicle will make abrupt stopping under normal braking
situation due to high braking pressure at each wheels.
(2) Operation
The brake pressure value and the changed value of the pressure sensor are the conditions in
which the HBA System operates. There are 2 pressure sensors under the master cylinder. When
the ESP ECU system determines that emergency braking is present, the pump operates, the
brake fluid in the master cylinder is sent to the pump and the braking pressure is delivered to the
wheels via the inlet valves . If the drive depress the brake pedal slowly, the pressure change is not
high. In this case, only the conventional brake system with booster is activated.
(3) Operating conditions
Sensor pressure: over 40 bar
Pressure changes: over 850 bar/sec
Vehicle speed: over 30 km/h -
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11-214890-10
2) 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 ABS 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.

11-24
5) 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.

01-236810-01
5. A/C INPUT/OUTPUT DIAGRAM
Below diagram shows the input/output mapping between the components of FATC A/C and A/C
controller briefly.
▶ A/C compressor control by engine ECU
In case of current vehicle models, the system turns ON or OFF the compressor switch according
to the refrigerant pressure, ambient temperature and condenser temperature to protect the
A/C
circuits. However, for the vehicles equipped with DI engine, the engine ECU turns off the
A/C
compressor under below conditions, including those above.
Coolant temperature: 20℃ or less
Coolant temperature: 115℃ or more
For approx. 4 sec. after starting the engine
Engine speed: 650 rpm or less
Engine speed: 4,500 rpm or more
During abrupt acceleration for the vehicle equipped with manual transmission 1.
2.
3.
4.
5.
6.

02-12
4. DEPLOYMENT
According to the collision deceleration rate that each collision G sensor reads, the air bag unit
sends out about 2~4 or higher Amp current. This current generates some heat, which fires the
detonator in the inflator.
The table shows the basic inner resistance of the air bag related module and the basic instant
current necessary for firing.
1) Air Bag System Deployment (Firing Loop)
2) Air Bag Deployment Signal Output (Crash Out)
When the air bag deploys, the signal is sent to STICS to perform the basic security operation
which is the automatic door unlock function that release the automatic door lock mode.
Deployment signal
output (crash out)200ms
Automatic Door Unlock (Crash unlock: unlock when colliding) ▶
The air bag collision signal input cannot be accepted within 7 seconds after turning the ignition
key to "ON" position.
After this period, the door lock system outputs "UNLOCK" for all doors for 5 seconds from 40
ms after receiving the air bag collision signal.
Even though the key is turned to "OFF" position during the output of "UNLOCK", the output
continues on for remaining period.
The function is erased when turning "OFF" the ignition switch. 1.
2.
3.
4.
Air bag module
DAB /PABSeat belt pretensioner(BPA)
Resistance (at -30 ~ 85˚C) 2 ±0.3 Ω 2.15 ±0.35 Ω
Firing current 1.2 Amps 0.8 Amps
Please do not connect a tester to any air bag connector or single item to measure the
supplied power or resistance. The detonator may explode due to a sudden extra power
supplied by the tester.
Before removing or installing any air bag related components, disconnect the negative
battery cable. -
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03-16
1) Types of Child Restraint System
There are 2 securing types for the child restraint system.
By using seat belt
By using ISOFIX (for the vehicle with ISOFIX system) -
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2) Securing the Child Restraint Seat (Normal Baby Seat)
Item Weight AgeFixing
methodRear
left/right seat
Driver seat/rear
center seat
Reversed seat< 10kg 6 to 9 months Seat belt U/SU X
< 13kg 12 to 15 months Seat belt U/SU X
Forward seat
9 to 18kg 9 to 48 monthsSeatbelt/
ISOFIXU/UF/SU X
Booster seat 15 to 25 kg 4 to 6 years Seat belt U X
Booster
cushion22 to 36 kg 6 to 11 years Seat belt U X
U: General child restraint system which should be fixed with the seat belt approved by official
institute.
UF/ SU: General child restraint system which should be fixed with the ISOFIX approved by
official/semiofficial institute.
X: Seat which is not allowed to use child restraint system. -
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03-177510-08
3) Securing a Child Seat with “ISOFIX” System
How to use the ISOFIXLower Latch Anchor ▶
The ISOFIX lower latch anchors are located
in the left and right outboard rear seating
positions. Their locations (1) are shown in
the illustration.
Insert the child restraint attachments into
the ISOFIX lower latch anchors until it
clicks.
Do not use the seat belt for installing the
ISOFIX child restraint.
There is no ISOFIX lower latch anchor
provided for the center rear seating
position. -
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(3) ISOFIX child
restrain
(1) ISOFIX mark (2) Latch anchor
When using the “ISOFIX” lower latch
system, all unused vehicle rear seat belt
metal latch plates or tabs must be
latched securely in their seat belt buckles
and the seat belt webbing must be
retracted behind the child restraint to
prevent the child from reaching and
taking hold of unretracted seat belts.
Unlatched metal latch plates or tabs may
allow the child to reach the unretracted
seat belts which may result in
strangulation and a serious injury or
death to the child in the child restraint.
Child restraint anchorages are designed
to withstand only those loads imposed
by correctly fitted child restraints. Under
no circumstances are they to be used for
adult seat belts or harnesses or for
attaching other items or equipment to the
vehicle. -
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03-18
How to use the Rear Anchor ▶
Two rear anchors are located on the rear
wall.
Connect the tether connector in child
restraint to the rear anchor.
Securely tighten the child restraint by
adjusting the webbing of the tether
connector. -
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Child restraint anchorages are designed to withstand only those loads imposed by correctly
fitted child restraints.
Make sure to use the lower latch anchors and rear anchor together when installing the ISOFIX
child restraint.
Insert the child restraint attachments into the ISOFIX lower latch anchors until it clicks.
The tether strap may not work properly if attached somewhere other than the correct rear
tether anchor.
If the child restraint is not anchored properly, the risk of a child being seriously injured or
killed in a collision greatly increases.
When using the ISOFIX lower latch anchors, make sure that no interference are around the
bar and the seat belt is not stuck.
Rock the child restraint to check if it is securely installed. Refer to instructions provided by
the manufacturer of the child restraint.
Do not install the child restraint if it hinders the operations of front seat. -
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