sensor SSANGYONG NEW ACTYON SPORTS 2013 Service Manual

11-14
2) EBD (Electronic Brake-force Distribution) Warning Lamp (Brake
Warning Lamp)
EBD warning lamp when the system perform the self diagnosis and when it detects the malfunction of
EBD system. However, the brake warning lamp comes on regardless of EBD when the parking brake is
applied.
EBD warning lamp ON:
When turning the ignition switch to ON position, ABS warning lamp and the brake warning lamp
comes on for 3 seconds for self diagnosis and goes off if the system is OK (initialization mode).
When applying the parking brake, the brake warning lamp comes on.
When the brake fluid is not sufficient, the brake warning lamp comes on.
When disengaging the connector, the warning lamp comes on.
When the system is defective, ABS warning lamp and the brake warning lamp come on
simultaneously. 1.
2.
3.
4.
5.
When the solenoid valve is defective
When one or more wheel sensors are defective
When ABS HECU is defective
When the voltage is abnormal
When valve relay is defective a.
b.
c.
d.
e.
When the communication between warning lamp CAN module in meter cluster, the warning
lamp comes on. 6.
3) ESP OFF Indicator
ESP OFF indicator ON:
When turning the ignition switch to ON position, ESP warning lamp comes on for 3 seconds for self
diagnosis and goes off if the system is OK (initialization mode).
When the ESP OFF switch is pressed to turn off ESP function, ESP OFF indicator comes on. 1.
2.
4) ESP Warning Lamp
ESP warning lamp ON:
When turning the ignition switch to ON position, ESP 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 the ESP function is activated, ESP warning lamp blinks with the interval of 2 Hz.
When the communication between warning lamp CAN module in meter cluster, the warning lamp
comes on. 1.
2.
3.
4.
5.
5) ESP OFF Switch
If ESP OFF switch is pressed, ESP function is deactivated and the ESP OFF indicator in the instrument
cluster comes on.
To resume the ESP function, press the switch again. At this time, ESP OFF indicator goes out.

11-16
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.

11-174890-10
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 ya
w
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.

11-194890-10
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 -
-
-

11-20
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.

11-274890-10
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.

01-56810-01
3. 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.

01-8
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. -
4. TROUBLESHOOTING
1) Overview

01-96810-01
▶ 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

01-10
(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.