sensor SSANGYONG NEW ACTYON SPORTS 2012 Service Manual

11-14
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.

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 -
-
-

11-174890-10
5) ARP (Active Roll-Over Protection
The ARP (Active Roll-over Protection) system is a safety assistant device that minimizes, by
controlling brakes and the engine, the physical tendency of the vehicle rollover during sharp lane
changes or U-turns. For the system, software is added to the existing ESP system and no
additional device or switch is needed. One must note that the ARP system, just as general
assistant devices including the ABS, is only a safety assistant device using the ESP system and its
function is useless when the situation overcomes the physical power. Following picture shows
how the ARP compensates the vehicle position by varying each wheel's braking power to
overcome the physical tendency of the vehicle rollover during sharp turns.
Lateral sensor
(In sensor cluster)
Vehicle speedBrake force
Radius
The vehicle driving condition is controlled by the internally programmed logic according to the
input signals from wheel speed sensor, steering angle sensor and lateral sensor.
During the ARP operation, vehicle safety (rollover prevention) takes the first priority and thus,
stronger engine control is in effect. Consequently, the vehicle speed decreases rapidly, so the
driver must take caution for the vehicle may drift away from the lane.

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.

01-36810-01
2. COMPONENTS
Blower and evaporator assembly
Actuator assembly - Intake
Air filter assembly
Cover - Air filter
Blower motor assembly
Resistor
Expansion valve assembly
Wiring assembly - Heater & evaporator
Heater assembly 1.
2.
3.
4.
5.
6.
7.
9.
10.Actuator assembly - Temperature
Actuator assembly - Mode
Heater assembly - PTC
Control assembly - Heater and A/C control
Bulb
Insert assembly - Ventilation
Sensor assembly - Humid and Incar
Sensor assembly - Intake 11.
12.
15.
20.
21.
22.
23.
24.

01-4
Condenser assembly
Compressor assembly - A/C
Hose assembly - Discharge
O-ring
O-ring
O-ring
O-ring
Hose assembly - Heater inlet
Hose assembly - Heater outlet
Pipe assembly - Joint
O-ring
O-ring
Pipe assembly - Liquid No.1
Pipe assembly - Liquid No.2 1.
2.
3.
4.
5.
7.
8.
9.
10.
11.
12.
13.
14.
15.O-ring
Pipe assembly - Liquid No.3
Hose assembly - Liquid
Receiver drier and bracket assembly
Nut
Nut
Bracket assembly - A/C compressor
Bolt
Bracket assembly - A/C compressor sub
Bolt
Hose - Drain
Sensor assembly - Receiver drier
Cap - Charge valve 16.
17.
18.
19.
20.
21.
22.
23.
25.
26.
27.
30.
50.

01-6
The FATC has a self-diagnosis function that can diagnose the system by itself. Before checking a
component, be sure to check the fault code by using the self-diagnosis function. The self-
diagnosis consists of 6 steps. The temperature control dial (step 2 to 5) and fan speed dial (step
6) are used to enter each step of the self-diagnosis. The 6 steps of the self-diagnosis are:
▶ Step 1
▶ Step 2
▶ Step 3
▶ Step 4- The VFD and all LED segments are checked for proper illumination.
- The sensors and air mix door are checked for proper operation.
- The position and condition of the air source door and mode door are checked.
The actuator door position, fan speed and compressor operation are checked. Pressing
the defroster switch after entering step 4 changes the diagnosis mode as follows: 41 -> 42
-> 43 -> 44 -> 45 -> 46 -> 41. -
3. TROUBLESHOOTING
1) Overview

01-76810-01
▶ 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.

01-96810-01
(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.