Mitsubishi Colt Ralliart. Manual — part 643

ON-VEHICLE SERVICE

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-117

5. This is indicated as shown in the above.

6. When any malfunction has been found, take a

necessary action according to the "Judgment
Table."

AC400603

Depressed

Released

Pressure increase

Pressure decrease

Pressure hold

Lock

Drag force when the
pedal is free

Pedal
operation

Solenoid
valve
position

Checking
the brake
force

Solenoid valve
position

AB

M.U.T.-III actuator test
(Item No.01, 02, 03, 04) start

1 s

2 s

3 s

3 s

M.U.T.-III actuator test
(Item No.05, 06, 07, 08) start

2 s

1 s

Pressure increase

Pressure decrease

Pressure hold

Depressed

Released

Pedal
operation

Lock

Drag force when the
pedal is free

Checking
the brake
force

<Item No.01, 02, 03, 04>

<Item No.05, 06, 07, 08>

Main

Index

Group

TOC

ON-VEHICLE SERVICE

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-118

Judgment Table

7. After the inspection, turn the ignition switch to the

LOCK (OFF) position, and then disconnect
M.U.T.-III.

Display on
M.U.T.-III

Operation

Test results

Judgment Cause

Measures

01 FR wheel
ABS
02 FL wheel
ABS
03 RR wheel
ABS
04 RL wheel
ABS

• Depress the brake

pedal to lock the
vehicle.

• Select the vehicle

to be inspected
using M.U.T.-III,
perform the
actuator test.

• Rotate the selected

wheel by hands to
confirm the braking
force.

Braking force
decreases for 3
seconds from
the lock status.

Normal

−

−

The wheel
does not lock
even if the
brake pedal is
depressed.

Error

Clogged brake line
other than hydraulic
unit

Check and
clean the brake
line.

Clogged hydraulic
circuit in the hydraulic
unit

Replace the
hydraulic unit
assembly.

Braking force
does not
decrease.

Faulty routing of
hydraulic unit brake
tube

Route the
brake tube
correctly.

Malfunction of
hydraulic unit solenoid
valve operation

Replace the
hydraulic unit
assembly.

05 FR wheel
TCL
06 FL wheel
TCL
07 RR wheel
TCL
08 RL wheel
TCL

• Select the vehicle

to be inspected
using M.U.T.-III,
perform the
actuator test.

• Rotate the selected

wheel by hands to
confirm the braking
force.

Lock condition
occurs for 3
seconds from
the status
without braking
force.

Normal

−

−

The wheel
does not lock.

Error

• Faulty routing of

hydraulic unit brake
tube

• Clogged brake line

other than hydraulic
unit

Check and
clean the brake
line.

Clogged hydraulic
circuit in the hydraulic
unit

Replace the
hydraulic unit
assembly.

Main

Index

Group

TOC

ON-VEHICLE SERVICE

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-119

MEASURES FOR DISCHARGED
BATTERY

M1357001700012

When starting the engine using a booster cable with
the battery fully discharged, if you begin driving the
vehicle before the battery is fully charged, the engine
misfire may occur and you cannot start the vehicle.
This is because ABS/ASC consumes more electric
current to perform the self-check. In this case,
charge the battery fully.

CAUTION

Because the vehicle posture when applying the
brakes becomes unstable, do not leave ABS/ASC
disabled (for example, ASC-ECU connector dis-
connection).

STEERING WHEEL SENSOR NEUTRAL
POINT LEARNING

M1357001800019

CAUTION

On completion of the following operation, make
the steering wheel sensor learn the neutral point.

• Alignment adjustment <Front>
• Steering wheel sensor (column switch assem-

bly) replacement, removal, installation

CAUTION

If ASC-ECU sets the diagnosis code other than
C1394 before calibration, carry out inspection
according to each troubleshooting procedure.
1. Park the vehicle on a level surface with tyres and

steering wheel positioned in a straight ahead
direction.

CAUTION

Before connecting or disconnecting M.U.T.-III,
always turn the ignition switch to the LOCK
(OFF) position.
2. Before setting M.U.T.-III, turn the ignition key to

the LOCK (OFF) position.

3. Ignition switch: ON
4. Select the system from the Menu.
5. On the "System selection" screen, select

"ABS/ASC/ASTC" in the system list, and then
click the "OK" button.

6. Select "Special function" in the "ABS/ASC/ASTC"

field.

7. In the "Special function" filed, select "SAS

calibration."

8. Press the "OK" button.
9. The neutral point is learned.
10.Erase the diagnosis code No. C1394 (Steering

wheel sensor neutral point not learned).

11.Turn the ignition key to the LOCK (OFF) position,

and remove the M.U.T.-III from the vehicle.

Main

Index

Group

TOC

ASC OFF SWITCH

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-120

ASC OFF SWITCH

REMOVAL AND INSTALLATION

M1357003300010

Refer to GROUP 54A - Fog lamp removal and instal-
lation.

INSPECTION

M1357003400017

ASC OFF SWITCH CONTINUITY CHECK

1. As shown in the figure, connect the circuit tester

to the ASC OFF switch terminals No. 5 and No. 6
as a single unit.

2. If continuity is detected when the ASC OFF switch

is pressed and if not detected when the switch is
released, the ASC OFF switch is in good
condition.

AC601058

Main

Index

Group

TOC