wheel MITSUBISHI LANCER EVOLUTION 2012 10.G Service Manual

3-120 Features and controls
3
AYC (Active yaw control system)
N00541500012
The AYC is a system, with a left-right differential limiting
function and yaw control function, that enhances cornering
performance and stability during cornering by controlling the
left-right drive power difference of the rear wheels, the braking
force of all four wheels, and the vehicle yaw moment. Left-right differential limiting functionThe left-right differential limiting function is a function that
enhances driving performance and vehicle stability by prevent-
ing idle spinning of a wheel when driving on slippery road sur-
faces or when the road surfaces of the left and right wheels are
different.Yaw control functionThe yaw control function is a function that enhances vehicle
cornering performance by controlling the drive power differ-
ence of the left and right wheels and the braking force when the
vehicle does not turn in response to steering input, such as
when the steering wheel is turned quickly or when driving on
slippery road surfaces.
S-AWC control mode
N00542400047
Select the control mode from the following three types to suit
the driving conditions.
CAUTION
!
Control of the braking force does not enhance the
stopping performance of the vehicle, therefore, pay
careful attention to the safety of your surroundings
when driving.
S-AWC control
mode
Operation
TA R M A CNormally, use this control mode. Use this
mode for paved roads.
GRAVELUse this control mode when driving on some-
what slippery road surfaces, such as wet road
surfaces and gravel roads.
SNOWUse this control mode when driving on slip-
pery road surfaces, such as snow-covered
roads.
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Features and controls
3-121
3
S-AWC control mode switchWhen the ignition switch is set to the “ON” position, operate
the AWC switch to change the control mode.
Except for vehicles with steering wheel audio remote con-
trol switches
Push the switch down to change the control mode in the order
“TARMAC” → “GRAVEL” → “SNOW” or push it up to
change the control mode in the order “SNOW” → “GRAVEL”
→ “TARMAC”.Vehicles with steering wheel audio remote control switches
Each time the switch is pushed, the control mode changes in
the order “TARMAC” → “GRAVEL” → “SNOW” → “TAR-
MAC”.
NOTE
The control mode can be changed while the vehicle is
moving.

The selected control mode is stored in memory even if the
engine is stopped.
However, if a battery terminal is disconnected, the control
mode stored in memory will be erased and the control
mode will be set to the “TARMAC” mode.
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Features and controls
3-125
3 Anti-lock braking system
N00517900295
The anti-lock braking system helps prevent the wheels from
locking up when braking. This helps maintain vehicle drivabil-
ity and steering wheel handling.Driving hints
Always keep a safe distance from the vehicle in front of
you. Even if your vehicle is equipped with the anti-lock
braking system, leave a greater braking distance when:
• Driving on gravel or snow-covered roads.
• Driving on uneven road surfaces.

Operation of anti-lock braking system is not restricted to
situations where brakes are applied suddenly. This system
may also prevent the wheels from locking when you drive
over manholes, steel roadwork plates, road markings, or
any uneven road surface.

When the anti-lock braking system is in use, you may feel
the brake pedal pulsation and the vibrations of the vehicle
body and steering wheel. It may also feel as if the pedal
resists being pressed.
In this situation, simply hold the brake pedal down
firmly. Do not pump the brake, which will result in
reduced braking performance.
An operation noise is emitted from the engine compart-
ment or feel a shock from the brake pedal when start driv-
ing immediately after starting the engine. These are
normal sound or operation that the anti-lock braking sys-
tem makes when performing a self-check. It does not indi-
cate a malfunction.

The anti-lock braking system can be used after the vehicle
has reached a speed over approximately 6 mph (10 km/h).
It stops working when the vehicle slows below approxi-
mately 3 mph (5 km/h).
CAUTION
!
The anti-lock braking system cannot prevent acci-
dents. It is your responsibility to take safety precau-
tions and to drive carefully.
To prevent failure of the anti-lock braking system,
be sure all 4 wheels and tires are the same size and
the same type.
Do not install any aftermarket limited-slip differen-
tial (LSD) on your vehicle. The anti-lock braking
system may stop functioning properly.
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3-128 Features and controls
3
After driving on icy roads
N00529200035
After driving on snow or icy roads, remove any snow and ice
which may have been left around the wheels. On vehicles that
have an anti-lock braking system, be careful not to damage the
wheel speed sensors (A) or the cables located at each wheel.Front
Rear
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Features and controls
3-129
3 Active stability control (ASC)
N00559100121
The active stability control (ASC) takes overall control of the
anti-lock braking system, traction control function and skid
control function to help maintain the vehicle’s control and trac-
tion. Please read this section in conjunction with the pages on
the anti-lock braking system, traction control function and skid
control function.
Anti-lock braking system → P. 3 - 1 2 5
Traction control function → P. 3 - 1 3 0
Skid control function → P. 3 - 1 3 0
NOTE
An operation noise may be emitted from the engine com-
partment in the following situations. The sound is associ-
ated with checking the operations of the ASC. At this
time, you may feel a shock from the brake pedal if you
depress it. These do not indicate a malfunction.
• When the ignition switch is set to the “ON” position.
• When the vehicle is driven for a while after the engine is
turned on.

When the ASC is activated, you may feel a vibration in
the vehicle body or hear a whining sound from the engine
compartment.
This indicates that the system is operating normally. It
does not indicate a malfunction.

When the anti-lock braking system warning light is illu-
minated, the ASC is not active.
CAUTION
!
Do not over-rely on the ASC. Even the ASC cannot
prevent the natural laws of physics from acting on
the vehicle. This system, like any other system, has
limits and cannot help you to maintain traction and
control of the vehicle in all circumstances. Reckless
driving can lead to accidents. It is the driver’s
responsibility to drive carefully. This means taking
into account the traffic, road and environmental
conditions.
Be sure to use the same specified type and size of tire
on all four wheels. Otherwise, the ASC may not
work properly.
Do not install any aftermarket limited-slip differen-
tial (LSD) on your vehicle. The ASC may stop func-
tioning properly.
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3-130 Features and controls
3
Traction control function
N00559200021
On slippery surfaces, the traction control function prevents the
drive wheels from spinning excessive, thus helping the vehicle
to start moving from a stopped condition. It also provides suffi-
cient driving force and steering performance as the vehicle
turns while pressing the acceleration pedal.Skid control function
N00546800010
The skid control function is designed to help the driver main-
tain control of the vehicle on slippery roads or during rapid
steering maneuvers. It works by controlling the engine output
and the brake on each wheel.NOTE
The skid control function operates at speeds of about
9 mph (15 km/h) or higher.
ASC OFF switch
N00559400209
When the ignition switch is turned to the “ON” position, the
ASC automatically turns ON. If the ASC OFF switch is
pressed to turn OFF the ASC, the display in the meter
comes on. Press the switch again to turn ON the ASC.
CAUTION
!
When driving a vehicle on a snowy or icy road, be
sure to install snow tires and drive the vehicle at
moderate speeds.
CAUTION
!
For safety reasons, press the ASC OFF switch when
the vehicle is stopped.
Be sure to turn ON the ASC for normal driving.
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Features and controls
3-131
3
NOTE
When moving out of mud, sand or fresh snow, pressing
the accelerator pedal may not allow the engine speed to
increase. In such situations, temporarily turning off the
ASC with the “ASC OFF” switch will make it easier to
move out your vehicle.

By pressing the ASC OFF switch, both the skid control
function and the traction control function are turned OFF.

By pressing down the “ASC OFF” switch for 3 seconds or
longer, you can deactivate the ASC and the braking con-
trol of the AYC.
At this time, the display will appear for a few sec-
onds.
Then, the previous screen will return and the “!” mark will
come on.
Press the ASC OFF switch again to turn ON the ASC.

If the ASC OFF switch is continuously pressed after the
ASC has been turned OFF or the ASC and the braking
control of AYC have been turned off, an erroneous opera-
tion prevention function operates and the ASC is automat-
ically turned ON.
ASC operation display or ASC OFF display
N00546500091
NOTE
The display may come on when you start the engine.
This means that the battery voltage momentarily dropped
when the engine was started. It does not indicate a mal-
function, provided that the display goes out immediately.

When a compact spare tire has been put on your vehicle,
the gripping ability of the tire will be lower, making it
more likely that the display/indicator will blink.
- ASC operation display/ASC indicator
The display/indicator will blink when the ASC is operat-
ing.
-ASC OFF display
The display is displayed when the ASC has been deac-
tivated with the “ASC OFF” switch.
CAUTION
!
When display/indicator blinks, ASC is operating,
which means that the road is slippery or that your
vehicle’s wheels are beginning to slip. If this hap-
pens, drive slower.
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3-132 Features and controls
3
ASC warning display
N00546600092
If an abnormal condition occurs in the system, the following
display/indicator will turn on.
Warning display
Limited-slip differential
N00517400014
A limited-slip differential is applied for front wheel differen-
tial. The features of this limited-slip differential are described
below:
Just as with a conventional differential, the wheel on one side
is allowed to turn at a different speed from the wheel on the
other side when the vehicle is cornering. The difference
between the limited-slip differential and a conventional differ-
ential is that if the wheel on one side of the vehicle loses trac-
tion, a greater amount of torque is applied to the wheel on the
other side to improve traction.NOTE
Even if there is a difference in the amount of traction the
wheels can get, if both of them are spinning, the limited-
slip differential will not be effective.
- ASC indicator
-ASC OFF display
CAUTION
!
The system may be malfunctioning.
Park your vehicle in a safe place and stop the engine.
Restart the engine again and check whether the dis-
play/indicator goes out. If they go out, there is no
abnormal condition. If they do not go out or appear
frequently, it is not necessary to stop the vehicle
immediately, but you should have your vehicle
inspected by an authorized Mitsubishi Motors
dealer or a repair facility of your choice as soon as
possible.
CAUTION
!
Never start the engine while one of the front or rear
wheels is jacked up and the other in contact with the
ground; doing so may cause the vehicle to jump for-
ward.
Continuously attempting to extract the vehicle from
snow, mud, etc. while using high engine rpm may
damage the limited-slip differential.
Using a compact spare wheel will adversely affect
the limited-slip differential; replace the compact
spare wheel with a standard size wheel as soon as
possible.
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Features and controls
3-135
3
NOTE
Once the brake assist system is operational, it maintains
great braking force even if the brake pedal is lightly
released.
To stop its operation, completely remove your foot from
the brake pedal.

The brake assist system may become operational when the
brake pedal is fully depressed even if it has not been
depressed suddenly.

When the brake assist system is in use while driving, you
may feel as if the depressed brake pedal is soft, the pedal
moves in small motions in conjunction with the operation
noise, or the vehicle body and the steering wheel vibrate.
This occurs when the brake assist system is operating nor-
mally and does not indicate faulty operation. Continue to
depress the brake pedal.

You may hear an operation noise when the brake pedal is
depressed suddenly while stationary. This does not indi-
cate a malfunction and the brake assist system is operating
normally.
Power steering system
N00518000293
The power steering system operates while the engine is run-
ning. It helps reduce the effort needed to turn the steering
wheel.
The power steering system has mechanical steering capability
in case the power assist is lost. If the power assist is lost for
some reason, you will still be able to steer your vehicle. If the
power assist is lost, you will notice it takes much more effort to
steer and that there is much more “free play” in the steering
wheel. If this happens, take your vehicle to an authorized
Mitsubishi Motors dealer or a repair facility of your choice.
WA R N I N G
!
Do not stop the engine while the vehicle is moving.
Stopping the engine would make the steering wheel
extremely hard to turn, possibly resulting in an acci-
dent.
CAUTION
!
Do not leave the steering wheel turned all the way in
one direction. This can cause damage to the power
steering system.
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3-144 Features and controls
3Tire pressure monitoring system
N00530200400
The tire pressure monitoring system uses tire inflation pressure
sensors (A) on the wheels to monitor the tire inflation pres-
sures. The system only indicates when a tire is significantly
under-inflated.
NOTE
The tire pressure monitoring system is not a substitute for
regularly checking tire inflation pressures.
Be sure to check the tire inflation pressures as described in
“Tires” on page 7-19.

Each of the grommets and washers where the tire inflation
pressure sensors are mounted should be replaced with new
ones when the tire is replaced.
For details, contact your authorized Mitsubishi Motors
dealer.
WA R N I N G
!
The spare wheel does not have a tire inflation pres-
sure sensor.
When the spare tire is used, the tire pressure moni-
toring system will not work properly.
See an authorized Mitsubishi Motors dealer as soon
as possible to replace or repair the original tire.
Wa s h e r
Tire inflation
pressure sensorGrommet
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