tow SSANGYONG NEW ACTYON SPORTS 2012 User Guide

11-134890-10
2) Operation of ESP System
The ESP (Electronic Stability Program) has been developed to help a driver avoid danger of losing
control of the vehicle stability due to understeer or oversteer during cornering. The yaw rate
sensor, lateral sensor and longitudinal sensor in the sensor cluster and the steering wheel angle
sensor under the steering column detect the vehicle conditions when the inner or outer wheels are
spinning during oversteer, understeer or cornering. The ESP ECU controls against oversteer or
understeer during cornering by controlling the vehicle stability using input values from these
sensors and applying the braking force to the corresponding wheels independently. The system
also controls the engine power right before the wheel spin synchronized with the ASR function to
decelerate the vehicle automatically in order to maintain the vehicle stable during cornering.
(1) Under steering
What is understeering? ▶
Understeer is a term for a condition in which the steering wheel is steered to a certain angle during
driving and the front tires slip toward the reverse direction of the desired direction. Generally,
vehicles are designed to have understeer. It is because that the vehicle can return back to inside of
cornering line when the steering wheel is steered toward the inside even when the front wheels are
slipped outward.
As the centrifugal force increases, the tires can easily lose the traction and the vehicle tends to slip
outward when the curve angle gets bigger and the speed increases.

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ESP controls during understeer ▶
The ESP system recognizes the directional angle with the steering wheel angle sensor and senses
the slipping route that occurs reversely against the vehicle cornering direction during understeer
with the yaw rate sensor and lateral sensor. Then, the ESP system applies the braking force to the
rear inner wheel to compensate the yaw moment value. In this way, the vehicle does not lose its
driving direction and the driver can steer the vehicle as intended.
(2) Over steering
What is oversteering? ▶
Oversteer is a term of a condition in which the steering wheel is steered to a certain angle during
driving and the rear tires slip outward losing traction.
Compared to understeering vehicles, it is hard to control the vehicle during cornering and the
vehicle can spin due to rear wheel moment when the rear tires lose traction and the vehicle speed
increases.
ESP controls during oversteer ▶
The ESP system recognizes the directional angle with the steering wheel angle sensor and
senses the slipping route that occurs towards the vehicle cornering direction during oversteer
with the yaw rate sensor and lateral sensor. Then the ESP system applies the braking force to the
front outer wheel to compensate the yaw moment value. In this way, the vehicle does not lose its
driving direction and the driver can steer the vehicle as intended.

13-6
Symptom Possible Cause
Blade type wear from outer side
toward inner side of the tread
Excessive toe-in,
Deflection of knuckle arm,
Difference in tie rod length
between left and right sides
Blade type wear from inner side
toward outer side of the tread
Excessive toe-in,
Deflection of knuckle arm,
Difference in tie rod length
between left and right sides
Corrugation wear of tread
Poor wheel balance,
Loose wheel bearing,
poor wheel alignment
InsideOutside
Inside
Outside
Inside
Outside

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▶ Step 5
Ambient
temperature
display
51
Interior
temperature
displayIntake air temperature
display
Ambient
temperature
sensorInterior
temperature
sensorIntake air
temperature sensor
▶ Step 6
To enter the step 6 from 5, turn the fan speed dial lightly toward the right not using the
temperature control dial. In this step, you can decrease or increase by up to 3 degrees
from the temperature set on the A/C controller. -You can check that the temperature value from each temperature sensor is displayed
properly in this step. Pressing the defroster switch changes the temperature value that
appears on the display in the order as follows: -
2) Self-diagnosis step
(1) Step 1
Turn the ignition ON and press the OFF switch for 5 sec. or more within 10 sec.
Then the first step of the self-diagnosis is started as shown in the below figure.
2. Display for checking VFD and all LED segments
1. Press OFF switch for 5 sec. or more

01-8
(2) Step 2
The sensors and air mix door are checked for proper operation in this step. When the step 2 is
started, the number "2", which indicates that the system is in the step 2, apprears on the display
and the check for sensors is performed. Once the check is done (for 10 to 20 sec.), the one digit
number between 0 and 8 is added behind "2". "20" means there is no fault code. For the meaning
of the rest of the numbers, refer to the description below.
1. Turn temperature dial lightly toward right to enter step 2
10 to 20
sec.
System starts sensor
check after "2" is
displayed 2.
Fault code for sensor
appears and blinks 3.
Fault code no. 1
(ambient temperature
sensor) blinks twiceFault code no. 5 (sun
sensor) blinks twice
(fault codes appears
sequentially)
If "-" is displayed before "2", it means
that the sensor for that flashing fault
code has a short circuit.
Ambient temperature
sensor short
circuited
Refer to the following table for the meaning of the fault code.

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(3) Step 3
In this step, you can check the position and condition of the air source door and mode door. To
start step 3, turn the temperature control dial lightly toward the right and confirm that the number 3
appears on the display. It takes several tens of seconds to finish the check. If there is no fault
code, "30" is displayed. And if there is a malfunction, the corresponding fault code is added as
described in the step 2.
Turn temperature dial lightly toward
right to enter step 3 1.
System starts
sensor check after
"3" is displayed 2. Fault code for
sensor appears
and blinks (30 is
displayed when
there is no fault) 3.
Refer to the following table for the meaning of the fault code.

01-10
In this step, the door position of each actuator, fan speed and operation of the compressor are
checked. To enter this step, turn the temperature dial to the right in the step 3. The number, "41",
appears on the display as soon as the step 4 is started. Press the defroster switch to change the
diagnosis mode.
(4) Step 4
Press
Press
Press
PressPress
Press
Turn temperature dial lightly
toward right to enter step 4 1.
Below table describes the detailed diagnosis items performed for each number. Check the
corresponding component for proper operation according to the table. The voltage values listed
in the table are the output voltage to operate the blower motor. The higher the voltage, the faster
the fan speed is.

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(5) Step 5
In this step, the system checks the temperature sensors used to control the A/C. To enter this
step, turn the temperature dial to the right in the step 4. The ambient temperature appears on the
display first and the interior temperature appears next and the intake air temperature last. The
display changes the temperature value each time the defroster switch is pressed.
1. Turn temperature dial lightly toward right to enter step 5
Press Press Press
Ambient
temperature
displayInterior
temperature
displayIntake air
temperature
display
(6) Step 6
You can increase or decrease by up to 3 degrees from the set temperature. When entering the
step 6 from 5, turn the fan speed dial.
Step 6 starts Decrease by up
to 3 degreesIncrease by up
to 3 degreesTurn fan
speed dial
to enter
step 6 1.
Turn
temperature
control dial to
adjust
temperature 2.

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3. GENERAL WARNINGS
Do not diagnose the circuit with a circuit tester or attempt to modify any air bag components
including the steering wheel, air bag mounting area and harness.
Incorrect inspection could cause a problem with an air bag and seat belt pretensioner, and
they cannot protect occupants properly. Inspection and repair service should be done only by
a qualified technician.
An infant or a child should not be seated on the front seat alone or on an adult's lap. An infant
or a child could be severely injured by air bag deployed.
A child restraint system should be placed on the rear seat which has the 3-point type seat belt.
Never install a child restraint system on the front seat. Impact by the air bag inflation might
cause severe injury or even death.
When an occupant fastens the seat belt with unstable or inclined posture, the air bag cannot
protect the occupant properly. Moreover, the occupant may be injured by the air bag.
Do not incline toward the steering wheel while driving. If you hit the air bag before it is fully
inflated, brain or neck injury, or even death can occur.
Be careful not to strike the steering wheel, air bag mounting area, any air bag related
component (including wiring) and seat belt pretensioner. You might get severely injured by
sudden deployment of the air bag.
The air bag contains explosive materials, so handle it carefully when disposing or replacing it.
The air bag components will be very hot immediately after deployment. Do not touch them until
they cool down.
Once the air bag/seat belt pretentioner is triggered, it will not deploy again even if an additional
impact is applied to it. Once triggered air bag/seat belt pretensioner related components
cannot be reused, so they should be removed from the vehicle and the whole system should
be replaced with a new one.
Do not place any object or sticker on the air bag mounting area for correct and safe activation
of the air bag.
Do not bang the door. Otherwise, an air bag might operate erroneously.
Hold the outer rim of the steering so that the air bag can inflate without any hindrance.
Do not incline toward the steering wheel or hold the steering wheel with your hands crossed. It
will cause a problem with the air bag activation or severe injury when the air bag inflates.
Never put your hands or feet on the dash board. You can severely injured when the air bag
inflates.
It is normal that a loud noise, dust and smoke occur when the air bag and seat belt
pretensioner operate.
The gas come out of air bag/seat belt pretensioner activation is non-toxic nitrogen gas.
However, if this gas occurs irritation to your skin, eyes, nose, and so on, wash it out with clean
water. Seek medical help if symptoms develop. -
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