Mitsubishi Colt Ralliart. Manual - part 641

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-109

DATA LIST REFERENCE TABLE

M1357001200017

Among the ASC-ECU input data, the following items 
can be read by using the M.U.T.-III.

Item 
No.

Check items

Check conditions

Normal conditions

01

FR wheel speed sensor

Drive the vehicle.

The speedometer display 
and the M.U.T.-III display 
almost agree with each 
other.

02

FL wheel speed sensor

03

RR wheel speed sensor

04

RL wheel speed sensor

05

Power supply voltage

Always

8 V or more

07

Valve relay

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

10

Stop lamp switch (input value)

The brake pedal is depressed.

ON

The brake pedal is released.

OFF

11

Stop lamp switch

The brake pedal is depressed.

ON

The brake pedal is released.

OFF

12

Brake switch (input value)

The brake pedal is depressed.

OFF

The brake pedal is released.

ON

13

Brake switch

The brake pedal is depressed.

OFF

The brake pedal is released.

ON

14

Lateral G-sensor (+:  right turn, -: left 
turn)

Vehicle stopped (level)

−1.1 to 1.1 m/s

2

Running

−17.7 to 17.7 m/s

2

15

Master cylinder pressure sensor

The brake pedal is depressed.

Increases by the amount 
of the brake pedal 
depression.

The brake pedal is released.

0 

−15 bar

16

Steering angle sensor (-: right turn, 
+: left turn)

Position the steering wheel in a 
straight ahead direction.

-5 

− 5 °

Running (when ASC-ECS is 
judged as normal.)

-500 

− 500 °

Single unit check (when the 
sensor unit is normal.)

-720 

− 720 °

17

Yaw rate sensor (-: right turn, +: left 
turn)

Vehicle stopped

-4 

− 4 °/s

Running

-100.2 

− 99.8 °/s

20

FL inlet valve

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-110

21

FL outlet valve

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

22

FR inlet valve

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

23

FR outlet valve

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

24

RL inlet valve

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

25

RL outlet valve

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

26

RR inlet valve

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

27

RR outlet valve

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

28

Side brake switch

The parking brake lever is pulled. ON
The parking brake lever is 
released.

OFF

29

Pump motor

The ABS, EBD, stability control 
system, and TCL are operated.

ON

The ABS, EBD, stability control 
system, and TCL are not 
operated.

OFF

Item 
No.

Check items

Check conditions

Normal conditions

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-111

30

SAS calibration flag

The steering wheel sensor 
calibration is completed.

Completion

The steering wheel sensor 
calibration is not completed.

Incompletion

31

SAS fail flag

The steering wheel sensor output 
is normal.

Normal

The steering wheel sensor output 
is abnormal.

Fail

32

Brake fluid level switch

The brake fluid level in the brake 
fluid reservoir is above "MIN."

OFF

The brake fluid level in the brake 
fluid reservoir is below "MIN."

ON

33

ASC OFF switch

The ASC OFF switch is pressed. ON
The ASC OFF switch is not 
operated.

OFF

34

FL/RR diagonal suction valve

The stability control system and 
TCL are operated.

ON

The stability control system and 
TCL are not operated.

OFF

35

FR/RL diagonal suction valve

The stability control system and 
TCL are operated.

ON

The stability control system and 
TCL are not operated.

OFF

36

FL/RR diagonal cut valve

The stability control system and 
TCL are operated.

ON

The stability control system and 
TCL are not operated.

OFF

37

FR/RL diagonal cut valve

The stability control system and 
TCL are operated.

ON

The stability control system and 
TCL are not operated.

OFF

Item 
No.

Check items

Check conditions

Normal conditions

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-112

ACTUATOR TEST TABLE

M1357001300014

Using the M.U.T.-III, the following actuators can be 
forcibly operated:
NOTE: 

.

•

The ABS, stability control, and TCL are operated 
by ASC-ECU.

•

When ASC-ECU is disabled due to the fail-safe 
function, the actuator test cannot be performed.

•

The actuator test can be performed only when 
the vehicle is stationary.

•

When communicating with the M.U.T.-III, the 
brake warning lamp, ABS warning lamp, ASC 
warning lamp and ASC OFF indicator lamp 
always illuminate.

Actuator test specifications

Item No.

Check items

Driven component

01

FR wheel ABS

Solenoid valve for the corresponding 
channel of the hydraulic unit and pump 
motor (simplified inspection mode)

02

FL wheel ABS

03

RR wheel ABS

04

RL wheel ABS

05

FR wheel TCL

06

FL wheel TCL

07

RR wheel TCL

08

RL wheel TCL

09

Engine TCL operation

Outputs the engine torque control signal 
(engine torque = 0 N

⋅m) to the engine 

ECU for three seconds.

Main

Index

Group

TOC