Index Mitsubishi Mitsubishi Outlander XL - service repair manual 2007 year

Content .. 647 648 649 650 ..

Mitsubishi Outlander XL. Manual - part 649

Inspection Procedure 1: Scan tool
cannot communication only with ASC-
ECU............................

Inspection Procedure 2: ASC OFF
Indicator Light Flashes at a Rate of
2Hz............................

Inspection Procedure 3: Brake Warning
Light Stays ON with the Parking Brake
Lever Released.................

Inspection Procedure 4: ABS Warning
Light does not Illuminate when Ignition
Switch is Turned to the ON Position
(Engine Stopped)...............

Inspection Procedure 5: Brake Warning
Light does not Illuminate when the
Ignition Switch is Turned to ON
Position (Engine Stopped)......

Inspection Procedure 6: ABS Warning
Light Stays ON.................

Inspection Procedure 7: ASC Indicator
Light Stays ON.................

Inspection Procedure 8: ASC-OFF
Indicator Light Stays ON.......

Inspection Procedure 9: After ASC
Switch is Turned OFF, TCL/ASC System
cannot be Disabled.............

Inspection Procedure 10: Abnormality
in Brake Operation.............

Inspection Procedure 11: Traction
Control Function or Skid Control
Function Inoperative...........

Inspection Procedure 12: ASC-ECU Power
Supply Circuit System..........

DATA LIST REFERENCE TABLE. . . .

ACTUATOR TEST REFERENCE TABLE
............................

CHECK AT ECU TERMINALS.......

SPECIAL TOOL.................

ON-VEHICLE SERVICE...........

HYDRAULIC UNIT CHECK.........

IN THE EVENT OF A DISCHARGED BATTERY
.............................

G AND YAW RATE SENSOR CALIBRATION
............................

STEERING WHEEL SENSOR CALIBRATION
.............................

BRAKE FLUID PRESSURE SENSOR
CALIBRATION..................

ASC OFF SWITCH...............

REMOVAL AND INSTALLATION. . . . .

INSPECTION...................

HYDRAULIC UNIT...............

REMOVAL AND INSTALLATION. . . . .

WHEEL SPEED SENSOR...........

REMOVAL AND INSTALLATION. . . . .

WHEEL AND TIRE INSPECTION. . . .

G AND YAW RATE SENSOR........

REMOVAL AND INSTALLATION. . . . .

STEERING WHEEL SENSOR........

REMOVAL AND INSTALLATION. . . . .

35C-3

GENERAL INFORMATION

M13506100118USA0000010000

ASC (Active Skid Control System) has been installed.

｠

The ASC system integrates the traction control
function and skid control function.

｠

When Traction control function detects the slip of
the  driving  wheel  (ex.  during  startup  on  slippery
surfaces),  it  automatically  applies  the  brakes  to
control  the  wheel  slip  ratios.  At  the  same  time,
Traction control function reduces the engine output
and prevents the wheel spin.

｠

Skid control function responds to driving conditions
and reduces the engine output and applies brake
force to four wheels independently to control the
vehicle behavior.

｠

Fail-safe function assures the safety.

｠

Serviceability improvement

｠

For reduced wiring harnesses and secure data
communication, the CAN*communication has been
adopted as a tool of communication with another
ECU.

NOTE:

｠

*For more information about CAN (Controller Area
Network), refer to GROUP 54D P.54D-3.

｠

ABS and ASC are controlled by ASC-ECU.

35C-4

ACTIVE SKID CONTROL SYSTEM (ASC)

GENERAL INFORMATION

CONSTRUCTION DIAGRAM

ZC600646

CHECK

SE R VIC E
RE

Q UIRE D

SE R VIC E
RE

Q UIRE D

ASC
OFF

0000

10

11

13

11

10

12

1

2

1

2

4

3

8

5

6

7, 9, 17

14

15

16

10

11

13

<Vehicles for CANADA>

<Except vehicles for CANADA>

NAME OF PART

NUM
BER

OUTLINE OF FUNCTION

Sensor

Wheel speed sensor

1

Outputs the frequency signal in proportion to the rotation speed
of each wheel to ASC-ECU.

Magnetic encoder for
wheel speed detection

2

The wheel speed sensor is a pulse generator. When the magnetic
encoder for wheel speed detection (a plate on which north and
south pole sides of the magnets are arranged alternately) rotates,
it outputs frequency pulse signal in proportion to each wheel
speed.

Stoplight switch

3

Outputs the signal indicating whether the brake pedal is
depressed or not through ETACS to ASC-ECU via CAN-bus line.

ACTIVE SKID CONTROL SYSTEM (ASC)

35C-5

GENERAL INFORMATION

NAME OF PART

NUM
BER

OUTLINE OF FUNCTION

G&yaw rate sensor

4

Detects yaw rate longitudinal (AWD only) and lateral acceleration
of a vehicle, and outputs signal to ASC-ECU via the CAN line.

Steering wheel sensor

5

Detects the steering angle of the steering wheel, and outputs
signal to ASC-ECU via the CAN bus line.

ASC OFF switch

6

Outputs the ON/OFF signal through ETACS to ASC-ECU via
CAN-bus line to turn on and off skid control function and traction
control function.

Pressure sensor

7

Integrated into the hydraulic unit, and outputs the signal for the
brake fluid pressure in the master cylinder to ASC-ECU.

Brake fluid level switch

8

Outputs a drop in the brake fluid level in the brake fluid reservoir
tank through ETACS to ASC-ECU via CAN-bus line.

ACTUA
TOR

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.

Brake warning light

11

Used as the warning light for the parking brake, brake fluid level,
and EBD control. Informs the driver of the system status by
illuminating, flashing, or turning off the warning light according to
the signal from ASC-ECU.

ASC operation indicator
light

12

Traction control function and skid control function use the same
display. Depending on the signal from ASC-ECU, the indicator
light informs the driver of the system status by flashing when the
system operates and by illuminating when skid control function or
traction control function has a malfunction.

ASC OFF indicator light 13

Informs  the  driver  of  skid  control  function  and  traction  control
function  shutdown  by  the  signal  from  ASC-ECU.  Informs  the
driver  that  the  brake  system  overheats  and  the  brake  traction
control stops by flashing the indicator light in approximately 2 Hz.

Data link connector

14

Sets the diagnostic trouble code and establishes the
communication with scan tool.

Engine ECU

15

Controls the engine output based on the signal from ASC-ECU.

AWD-ECU

16

Outputs the drive status to ASC-ECU.

ASC-ECU

17

Controls actuators (described above) based on the signals
coming from each sensor.
Controls the self-diagnosis and fail-safe functions.
Controls the diagnostic function (scan tool compatible).

SERVICE SPECIFICATIONS

M13506100001USA0000010000

Item

Standard value

Wheel speed sensor current mA

5.9 - 8.4 or 11.8 - 16.8

Wheel speed sensor insulation resistance MΩ

5 or more

35C-6

ACTIVE SKID CONTROL SYSTEM (ASC)

SERVICE SPECIFICATIONS

Content .. 647 648 649 650 ..