Mitsubishi Colt Ralliart. Manual — part 619

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-21

STEP 6. Check for wheel bearing looseness
NOTE: Loose wheel bearing may increase the gap
between the wheel speed sensor and the wheel
speed detection magnet encoder. Check the wheel
bearing indicated by the code No. for looseness.

• Front: Refer to GROUP 26 − On-vehicle Service

P.26-5

.

• Rear: Refer to GROUP 27A − On-vehicle Service

P.27-3

.

Q: Is the check result normal?

YES :

Go to Step 7.

NO <when the relevant wheel is front> :

Replace

the wheel bearing. (Refer to GROUP 26

−

Front Axle Hub

P.26-13

.)

NO <when the relevant wheel is rear> :

Replace

the rear hub assembly. (Refer to GROUP
27A

− Rear Axle Hub

P.27-6

.)

STEP 7. Wheel speed detection magnetic
encoder check

Check the wheel speed detection magnetic encoder
for adhesion of foreign materials or deformation.
NOTE: For the rear wheel speed detection magnetic
encoder, check from the mounting hole of the wheel
speed sensor by rotating the rear hub.

Q: Is the check result normal?

YES :

Go to Step 8.

NO <when the relevant wheel is front> :

When a

foreign material adheres to the encoder,
clean it. When the encoder is deformed,
replace the wheel bearing. (Refer to
GROUP 26

− Front Axle Hub

P.26-13

.)

NO <when the relevant wheel is rear> :

When a

foreign material adheres to the encoder,
clean it. When the encoder is deformed,
replace the rear hub assembly. (Refer to
GROUP 27A

− Rear Axle Hub

P.27-6

.)

Diagnosis code No.

Relevant
sensor

C1201

Front right

C1206

Front left

C1211

Rear right

C1216

Rear left

AC600965

<Front>

<Rear>

Encoder

AB

Encoder

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-22

STEP 8. Voltage measurement: A-05 ASC-ECU
connector

(1) Disconnect the connector, connect the ABS

check harness (Special tool: MB991984) to the
harness-side connector, and measure the voltage
at the special tool connector side.
NOTE: . Do not connect the special tool to
ASC-ECU.

(2) Ignition switch: ON
(3) Measure the voltage between the power supply

and signal terminals in the wheel speed sensor
circuit and body earth.

OK: 0 V

Q: Is the check result normal?

YES :

Go to Step 9.

NO (Not normal at the terminal No. 29 or 28) :

Go

to Step 10.

NO (Not normal at the terminal No. 34 or 13) :

Go

to Step 11.

NO (Not normal at the terminal No. 30 or 8) :

Go to

Step 12.

NO (Not normal at the terminal No. 11 or 10) :

Go

to Step 13.

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601085AB

MB991984

Check connector

ASC-ECU

ASC-ECU harness connector

Diagnosis code No.

Checking terminal
Power
supply
terminal

Signal
terminal

C1201

No. 29

No. 28

C1206

No. 34

No. 13

C1211

No. 30

No. 8

C1216

No. 11

No. 10

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-23

STEP 9. Measure the resistance at A-05 ASC-ECU
connector.

(1) Disconnect the connector, connect the ABS

check harness (Special tool: MB991984) to the
harness-side connector, and measure the voltage
at the special tool connector side.
NOTE: Do not connect the special tool to
ASC-ECU.

(2) Measure the resistance between the power

supply and signal terminals in the wheel speed
sensor circuit and body earth.

OK: No continuity

Q: Is the check result normal?

YES :

Go to Step 14.

NO (Not normal at the terminal No. 29 or 28) :

Go

to Step 10.

NO (Not normal at the terminal No. 34 or 13) :

Go

to Step 11.

NO (Not normal at the terminal No. 30 or 8) :

Go to

Step 12.

NO (Not normal at the terminal No. 11 or 10) :

Go

to Step 13.

STEP 10. Connector check: A-05 ASC-ECU
connector, A-29 wheel speed sensor <FR>
connector

Q: Is the check result normal?

YES :

Go to Step 16.

NO :

Repair the damaged connector.

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601085AC

MB991984

ASC-ECU

Check connector

ASC-ECU harness connector

Diagnosis code No.

Checking terminal
Power
supply
terminal

Signal
terminal

C1201

No. 29

No. 28

C1206

No. 34

No. 13

C1211

No. 30

No. 8

C1216

No. 11

No. 10

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601084

Connector: A-29

AB

Harness
side

A-29(black)

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-24

STEP 11. Connector check: A-05 ASC-ECU
connector, A-06 wheel speed sensor <FL>
connector

Q: Is the check result normal?

YES :

Go to Step 18.

NO :

Repair the damaged connector.

STEP 12. Connector check: A-05 ASC-ECU
connector, B-41 intermediate connector, C-06
wheel speed sensor <RR> connector

Q: Is the check result normal?

YES :

Go to Step 20.

NO :

Repair the damaged connector.

AC601083

Connectors: A-05, A-06

AC

A-05(Black)

A-05:
Harness side

A-06: Harness side

A-06 (Black)

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601092

Connector: B-41

AB

AC601093

Connector: C-06

AB

Harness side

C-06 (Black)

Main

Index

Group

TOC