stop start SSANGYONG NEW ACTYON SPORTS 2013 User Guide

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2. CONFIGURATION
1) RPM Gauge
The tachometer indicates engine speed in revolutions per minute. Multiply 1,000 to the current number,
then it will be the current number of engine revolutions.
Under the normal engine operating temperature, the proper idling speed is 700 ~ 800 rpm. The red zone
(danger rpm range) starts from 4,500 rpm.
Connect the tachometer for tune-up test and start the engine.
Eliminate the hysteresis by tapping the tachometer.
Compare the values on the tester and tachometer and replace the tachometer if the tolerance is
excessive. 1.
2.
3.
If the tachometer (engine rpm gauge) pointer vibrates or stops moving at a certain range, or abnormal
noises are heard from the tachometer, the tachometer may have a malfunction. If you have reason to
suspect that the reading from the tachometer differs from the actual engine speed (rpm), connect a
diagnostic device and compare the value on tachometer with the reading from the diagnostic device.
Check Method

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2) Function of N Switch
(1) Aids a smooth start of the vehicle by raising the RPM during the gear
shifting when the engine is cold.
When the vehicle is trying to start from the stopped state (vehicle speed below 3 km/h), the N switch
determines the shifting timing by using the clutch switch and the N switch. It raises the engine RPM (100
~ 200 rpm). Operation conditions are as follows.
The vehicle speed is at the stopped state (Vehicle speed below 3km/h detection).
While depressing the clutch (Clutch switch detection).
The gear lever is at a position other than neutral (N switch detection).
Start the vehicle while depressing the clutch pedal (Clutch switch detection).
The RPM increases in accordance with the temperature of the engine coolant
(Engine coolant temperature sensor detection). -
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appx. 100 rpm increase
appx. 100 ~ 170 rpm increase
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95009b005000610047008800990096009c0095008b00470059>00 rpm ·
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When the gear has been smoothly shifted and the vehicle speed exceeds 3km/h, it returns to the
previous operation interval of the engine RPM. -
In case of Actyon, the N switch signal is transmitted to the instrument panel, and then the instrument
panel transmits it to the engine ECU through the CAN communication.
Vehicle Made After 04.09.15 Actyon

09-4
2. SYSTEM OVERVIEW
1) Terms and Definition
CBS: Conventional Brake System
ABS: Anti-Lock Brake System
EBD: Electronic brake-Force Distribution
ESP: Electronic Stability Program
ABD: Automatic Braking Differential
ASR: Acceleration Slip Regulation
AYC: Active Yaw Control (Understeer and Oversteer Control)
HBA: Hydraulic Brake Assistant
ARP: Active Rollover Protection
HSA: Hill Start Assistant
Brake pad: Brake pad is a component of disk brakes used in automotive and other applications.
Brake pad is steel backing plates with friction material bound to the surface that faces the brake disc.
Brake disc: The brake disc is a device for slowing or stopping the rotation of a wheel while it is in
motion.
Brake caliper: To stop the wheel, friction material in the form of brake pads (mounted on a device
called a brake caliper) is forced hydraulically against both sides of the disc. Friction causes the disc
and attached wheel to slow or stop.
Brake master cylinder: The brake master cylinder is a control device that converts non-hydraulic
pressure (commonly from a driver's foot) into hydraulic pressure, in order to move other device(s)
which are located at the other end of the hydraulic system, such as one or more slave cylinders. As
piston(s) move along the bore of the master cylinder, this movement is transferred through the
hydraulic fluid, to result in a movement of the slave cylinder(s). The hydraulic pressure created by
moving a piston (inside the bore of the master cylinder) toward the slave cylinder(s) compresses the
fluid evenly, but by varying the comparative surface-area of the master cylinder and/or each slave
cylinder, one will vary the amount of force and displacement applied to each slave cylinder (relative to
the amount of force and displacement that was applied to the master cylinder). -
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FunctionVehicle with CBS
Vehicle with ABS/EBD Vehicle with ESP
ABS
Not appliedApplied
Applied EBD Applied
ABD
Not applied ASR
AYC
HBA
ARP
2) Functions

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Maximum Stroke of Brake Pedal ▶
Check the brake pedal with below procedures: -
Start the engine.
Pump the brake pedal around 3 times.
Depress the brake pedal with approx. 30 kg
and measure the distance (A) between the
upper surface of pedal pad and the lower
dash panel.
If the measured value is out of the specified
value, adjust the length. 1.
2.
3.
4.
Specified value (A)150mm
5. BRAKE SYSTEM CHECK
Over the specified value
Cause Action
Worn brake pad Replace
Worn brake shoe Replace
Improper stroke of hand
brakeAdjust
Air in brake line Air bleeding
Oil leak Repair or replace
Brake booster push rod Replace or adjust
Improperly adjusted
stopper boltAdjust
Below the specified value
Cause Action
Brake booster push rod
Replace or adjust
Air in brake fluid Replace
Improperly adjusted
stopper boltAdjust

09-14
Specified value (B)155mm
Push rod
Stop lamp
switch Pedal Height ▶
Check the pedal height with below procedures: -
Start the engine and measure the length (A)
between floor mat and pedal.
If the measured value is out of the specified
value, adjust the length. 1.
2.
Adjust the pedal height with below procedures: -
Disconnect the stop lamp switch connector.
Unscrew the lock nut and remove the stop
lamp switch assembly.
Loosen the lock nut on the pedal push rod.
Turn the pedal push rod to adjust the pedal
height.
Tighten the lock nut.
Install the stop lamp switch assembly.
Connect the stop lamp switch connector.
Check if the stop lamps come on when
pressing the brake pedal around 5 mm.
If the stop lamp dpes not come on, adjust the
stop lamp switch assembly again.
If the stop lamps come on, tighten the lock nut
and measure the pedal height again. 1.
2.
3.
4.
5.
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9.
10.

09-16
Let the engine run for 1 to 2 minutes and
stop it. If the brake pedal stroke is shortened
as pumping the brake pedal, the system is
normal. If not, the system is defective.
Depress the brake pedal several times with
engine off. If the brake goes down when
starting engine with pedal depressed, the
system is normal. If not, the system is
defective.
Depress the brake pedal when the engine is
running. If the pedal height is not changed for
30 seconds after stopping the engine, the
system is normal. If not, the system is
defective. 1.
2.
3.
If the above three checks are OK, the system is
normal. If any condition is not met, check the
valve, vacuum hose and brake booster. Brake Booster ▶

10-14
2) 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.
(1) Stopping distance
(2) 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:
Maximum brake force ▶
FBmax = wheel load FR x coefficient of
frictionMh
The braking process cannot be described
sufficiently accurately with the brake forces
calculated. The values calculated only apply if
the wheel is not locked. In the case of a locking
wheel, the static friction turns into lower sliding
friction, with the result that the stopping distance
is increased. This loss of friction is termed "slip"
in specialist literature.
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.

11-10
3. FUNCTION
1) Term Definition
ABS: Anti-Lock Brake System ▶
When the brake pedal is abruptly depressed, the HECU calculates the slip ratio of each wheel based on
information received from the wheel speed sensors and controls the hydraulic module data quickly and
precisely in order to maintain the friction between the road surface and tire optimal (static friction).
Therefore, by keeping the friction between the road surface and tire optimal, it is possible to obtain
following effects: Enhanced steering stability, improved direction stability, reduced stopping distance and
etc.
EBD: Electronic brake-Force Distribution ▶
This is to detect the tire speed from the wheel speed sensor in order to supply the braking pressure to
the rear tires individually. In other words, the HECU measures the tire deceleration speed continuously
and controls the rear inlet valve on the hydraulic modulator to obtain optimal braking force as much as
possible. Thereby, stopping distance, braking effect and straight stability are improved.
ESP: Electronic Stability Program ▶
This is used to make the vehicle stabilized to recognize the emergency driving conditions, and to control
the brake for each wheels and the engine power when the brake system or acceleration will not work
any more in dangerous circumstances.
TCS: Traction Control System ▶
When the wheel is slipping due to an excessive engine torque while starting off or driving, this controls
the driving force (braking force + engine torque) in order to prevent the wheel from slipping through the
engine or brake control.
AYC: Active Yaw Control ▶
This has been developed to help a driver avoid danger of losing control of the vehicle stability due to
understeer or oversteer during cornering, which is a part of the ESP function.
HBA: Hydraulic Brake Assistant ▶
Developed based on the fact that elderly drivers depress the brake pedal too soft even when hard
braking is necessary, this an assist system to operate the HECU drive motor immediately and apply high
braking force to the wheels when the brake pedal is depressed softly and the vehicle should be braked
in emergency.
ARP: Active Rollover Protection ▶
This is a supplementary device for safety in ESP system and can help minimize the rollover accidents by
detecting a potential rollover situation through the brake and engine control when making sudden lane
change or turning sharply by adding only the software, without any separate device or switch.