Mitsubishi Evolution X. Manual — part 155
GENERAL INFORMATION
TSB Revision
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-5
NOTE:
.
•
*1
: For information on AYC (Active Yaw Control),
refer to GROUP 22B
−
Super All Wheel Control
(S-AWC), Description of Structure and Operation
•
*2
: Only for vehicles with TC-SST
.
Actuator
Hydraulic unit
9
Drives the solenoid valve using the signal from
ASC-ECU, and controls the brake fluid pressure for
each wheel.
ABS warning light
10
Informs the driver of the system status by illuminating,
flashing, or turning off the warning light according to
the signal from ASC-ECU.
ABS warning display
11
Informs the driver of the system status by illuminating
or turning off the warning light according to the signal
from ASC-ECU.
Brake warning light
12
Used as the warning light for the parking brake, brake
fluid level, and EBD control. Informs the driver of the
system status by illuminating or turning off the warning
light according to the signal from ASC-ECU.
Brake warning display
13
Used as the warning light for the brake fluid level and
EBD control. Informs the driver of the system status by
illuminating or turning off the warning light according to
the signal from ASC-ECU.
ASC operation display
14
According to the signal from ASC-ECU, flashes when
the system is active to inform the driver of the status.
ASC warning display
15
The TCL function and ASC function use the same
display. According to the signal from ASC-ECU, the
display is illuminated to inform the driver that the
system is abnormal.
ASC OFF light
16
Informs the driver of the ASC system shutdown by
illuminating according to the signal from ASC-ECU.
ASC OFF display
17
Using the signal from ASC-ECU, the display is
illuminated to inform the driver that the ASC OFF
switch is pressed and held for 3 seconds, and that the
ASC and AYC
*1
brake control is prohibited.
Data link connector
18
Outputs the diagnostic trouble code and establishes
the communication with the scan tool.
Engine control module
19
Controls the engine output based on the signal from
ASC-ECU.
TC-SST ECU
*2
20
*2
Outputs the shift position to ASC-ECU.
S-AWC ECU
21
Outputs the drive status and brake fluid pressure
request to ASC-ECU.
ASC-ECU
22
Controls the actuators (described above) based on the
signals coming from each sensors.
Controls the self-diagnostic functions and fail-safe
functions.
Controls diagnostic function (Compatible with scan
tool).
Parts name
No. Functional description
GENERAL INFORMATION
TSB Revision
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-6
SYSTEM CONFIGURATION
.
AC704103
ASC OFF switch
G&yaw rate sensor
Engine ECU
S-AWC-ECU
TC-SST-ECU
ASC-ECU
ETACS-ECU
AB
Local CAN
CAN-C
CAN-B
Stop light switch
Combination meter
Steering wheel sensor
Wheel
speed
sensor
(RR)
Wheel
speed
sensor
(RL)
Wheel speed
sensor (FL)
Wheel speed
sensor (FR)
GENERAL INFORMATION
TSB Revision
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-7
ASC ELECTRICAL DIAGRAM
M
(FL)
(FR)
(RL)
(RR)
AC704112
No.9
15A
No.5
10A
No.17
10A
No.2
15A
ON
OFF
No.12
7.5A
No.8
7.5A
ETACS-
ECU
No.30
30A
ON
OFF
CPU
Engine ECU
Selecter lever
Transmission
assembly
CPU
Rheostat
LCD(BRAKE, ABS, ASC OFF,
ASC FAILURE, ASC ACTIVE,
TARMAC, GRAVEL, SNOW,
ACD, AYC)
LED driver
ABS
BRAKE
ON
OFF
ASC OFF
switch
ON
OFF
S-AWC
switch
<Vehicles without
S-AWC switch>
Steering wheel
sensor
S-AWC-ECU
Pressure sensor
Direction
valve
(for ACD)
MODE(-)
MODE(+)
ILL
ILL
ILL
Spare connector
Steering wheel
S-AWC switch
ASC-ECU
G and yaw rate
sensor
ON
OFF
AB
Fusible link No.34
Ignition switch (IG1)
Analog
interface
Analog
interface
CAN driver
Interface
CAN driver
Interface
CAN driver
Interface
Fusible link No.36
Relay box
Combination meter
Back-up power supply
Clock spring
Solenoid valve power supply
Pressure
sensor
Pressure
sensor
Pressure
sensor
Pressure
sensor
Pressure
sensor
Solenoid valve
Hydraulic unit
Motor power supply
Motor power supply
Fusible
link No.27
Fusible
link No.26
Solenoid valve power supply
Power
supply
Wheel speed sensor
Magnetic
pump
Fusible
link No.35
Power
supply
Data link
connector
Stop
light
switch
Stop light,
shift lock
Interface
Interface
CAN transceiver
Direction
valve
(for AYC)
Direction
valve
(left)
Direction
valve
(right)
CONSTRUCTION DESCRIPTION
TSB Revision
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-8
CONSTRUCTION DESCRIPTION
SENSOR
M2355001100158
WHEEL SPEED SENSOR
Refer to GROUP 35B
− Sensor
STEERING WHEEL SENSOR
Refer to GROUP 35B
− Sensor
G AND YAW RATE SENSOR
This sensor is installed under the instrument panel center
lower, and detects the yaw rate as well as the lateral and longi-
tudinal acceleration of the vehicle.
ASC OFF SWITCH
The ASC OFF switch is installed to the instrument panel to the
right of driver seat. By the operation of this switch, the TCL
function, skid control function, and AYC brake control can be
enabled or prohibited. As a countermeasure against the ASC
OFF switch sticking, the ASC system returns to the ON status
when the ASC OFF switch is pressed and held for 15 seconds.
When the ignition switch is turned from "LOCK" (OFF) to ON
position, the TCL function and skid control function are con-
stantly in the ON status.
.
AC613534
AB
SRS-ECU
G&yaw rate sensor
AC708751
ASC
OFF
AB
ASC OFF switch
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