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>

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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.

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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.

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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

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