Mitsubishi Evolution X. Manual - part 145

SUPER ALL WHEEL CONTROL (S-AWC)

TSB Revision

MANUAL TRANSAXLE

22A-7

AWC SWITCH

With the operation of AWC switch, the driving mode can be 
switched among TARMAC, GRAVEL, and SNOW.
Depending on the mounting position, the mode switching dif-
fers with the AWC switch.

• Steering wheel

(TARMAC 

⇔ GRAVEL ⇔ SNOW)

• Floor console <Vehicles with steering wheel audio remote 

control>
(TARMAC 

→ GRAVEL → SNOW → TARMAC)

.

MULTI INFORMATION DISPLAY

The current driving mode is displayed at all times to the upper 
center of multi information display. When the mode is switched, 
the mode switching status is displayed automatically to the 
information screen at the middle, and then the screen returns to 
the previous screen after the completion of setting.

Also, by the operation of multi information meter switch, an 
exclusively designated screen for displaying the AWC opera-
tion status can be set to the information screen at the middle. 
This exclusively designated screen displays the ACD differen-
tial limit status to the screen center, and the yaw movement 
control status by AYC to the screen left and right.

AC709649AC

AC706060 AC

AC706013

GRAVEL

SNOW

TARMAC

AWC mode

AWC mode
(When switched)

AC

AC705117AC

ACD differential limit 
status

Yaw movement 
control status 
by AYC
(Figure: When the 
right-turn moment 
is applied)

SUPER ALL WHEEL CONTROL (S-AWC)

TSB Revision

MANUAL TRANSAXLE

22A-8

CONTROL OVERVIEW

M2223000800028

AWC CONTROL MODE

The AWC control is the same as with EVOLUTION 
IX, and the control mode can be switched among 
TARMAC, GRAVEL, and SNOW in response to road 
conditions.

SENSOR INFORMATION

Together with the sensor information used with EVO-
LUTION IX, information on engine torque, engine 
speed, and brake pressure yaw rate have been 
added to enable more substantial control, thus 
improving the responses to vehicle driving condi-
tions.

YAW RATE FEEDBACK CONTROL

.

INTRODUCTION OF YAW RATE 
FEEDBACK CONTROL

Using the yaw rate sensor information, the vehicle 
cornering status is accurately determined, and the 
vehicle cornering motion that is faithful to the driver's 
steering operation has been achieved.

.

AWC control mode Control content
TARMAC

Mainly for a dry paved road surface. A slight control is performed with ACD, and a 
focused control is performed with AYC (lateral torque movement control, brake 
control).

GRAVEL

Mainly for a wet road surface and dirt road. A slightly strong control is performed with 
ACD, and a mid-range control is performed with AYC (lateral torque movement 
control, brake control).

SNOW

Mainly for snowy roads. A focused control is performed with ACD, and a slight control 
is performed with AYC (lateral torque movement control, brake control).

SUPER ALL WHEEL CONTROL (S-AWC)

TSB Revision

MANUAL TRANSAXLE

22A-9

EFFECTS OF YAW RATE FEEDBACK CONTROL

With the cornering performance of when vehicle is 
steered to trace a turning circle of certain radius 
while the speed is gradually increased, the under-
steer is further suppressed compared to the 
ACD/AYC control adopted with EVOLUTION IX, 

resulting in a further improvement to cornering per-
formance. For the quick steering lane change on a 
slippery road surface, the stability and convergence 
of vehicle behavior at the completion of lane change 
have also been improved.

BRAKE CONTROL

.

ADDITION OF BRAKE CONTROL

In addition to the conventional lateral torque move-
ment control, a new brake control has been added to 
AYC. It is activated near the driving limit range to 
assist the yaw motion control.

Brake force is applied to the inside wheels while the 
vehicle behavior is understeer during cornering, and 
to the outside wheels when oversteer, achieving the 
vehicle cornering performance that corresponds to 
the driver's operation. Also, the spinning of front 
wheels at vehicle start is suppressed by the brake 
force, improving the traction performance.
This brake control can be deactivated with the ASC 
OFF switch.

.

AC705142 AC

Cornering limit has been improved.

Current ACD/AYC control

AWC 
control

Under-steering 
has been 
reduced.

Centripetal acceleration

0

0

0

Current ACD/AYC control

AWC control

Convergence and stability 
have been improved.

Steering 
angle

Yaw rate

Time

Steering 
angle 
ratio

AC705118 AC

AWC-ECU

Brake control command

ASC-ECU

Brake force is 
generated.

Master cylinder brake
hydraulic pressure sensor

Hydraulic unit

Brake force is 
generated.

Brake force is 
generated.

Brake force is 
generated.

Offers information 
of sensor and ASC 
status.

Wheel cylinder brake
hydraulic pressure sensor

SUPER ALL WHEEL CONTROL (S-AWC)

TSB Revision

MANUAL TRANSAXLE

22A-10

EFFECTS OF BRAKE CONTROL

The understeer behavior and oversteer behavior 
near the driving limit range are further suppressed.

INTEGRATED CONTROL OF 
ACD/AYC/ASC/ABS

ASC has been added to ACD, AYC, and ABS that 
are equipped with LANCER EVOLUTION IX, and an 
integrated control is performed to enhance the driv-
ing performance, cornering performance, and stabil-
ity in any driving condition during acceleration, 
deceleration, and cornering.

ADDITION OF TC-SST CONTROL 
<VEHICLES WITH TC-SST>

For vehicles with TC-SST, AWC-ECU communicates 
with TC-SST-ECU via CAN line to suppress unnec-
essary gear shifts during cornering which hamper the 
sport driving.