Mitsubishi Colt Ralliart. Manual - part 623

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-37

STEP 6. 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 7.

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

.)

STEP 7. 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.

AC600965

<Front>

<Rear>

Encoder

AB

Encoder

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601085AB

MB991984

Check connector

ASC-ECU

ASC-ECU harness connector

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-38

OK: 0 V

Q: Is the check result normal?

YES : 

Go to Step 8.

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

Go 

to Step 9.

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

Go 

to Step 10.

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

Go to 

Step 11.

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

Go 

to Step 12.

STEP 8. 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.

Wheel speed sensor 
position

Checking terminal
Power 
supply 
terminal

Signal 
terminal

Right front wheel

No. 29

No. 28

Left front wheel

No. 34

No. 13

Right rear wheel

No. 30

No. 8

Left rear wheel

No. 11

No. 10

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601085AC

MB991984

ASC-ECU

Check connector

ASC-ECU harness connector

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-39

OK: No continuity

Q: Is the check result normal?

YES : 

Go to Step 13.

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

Go 

to Step 9.

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

Go 

to Step 10.

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

Go to 

Step 11.

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

Go 

to Step 12.

STEP 9. Connector check: A-05 ASC-ECU 
connector, A-29 wheel speed sensor <FR> 
connector

Q: Is the check result normal?

YES : 

Go to Step 15.

NO : 

Repair the damaged connector.

STEP 10. Connector check: A-05 ASC-ECU 
connector, A-06 wheel speed sensor <FL> 
connector

Q: Is the check result normal?

YES : 

Go to Step 17.

NO : 

Repair the damaged connector.

Wheel speed sensor 
position

Checking terminal
Power 
supply 
terminal

Signal 
terminal

Right front wheel

No. 29

No. 28

Left front wheel

No. 34

No. 13

Right rear wheel

No. 30

No. 8

Left rear wheel

No. 11

No. 10

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601084

Connector: A-29

AB

Harness 
side

A-29(black)

AC601083

Connectors: A-05, A-06

AC

A-05(Black)

A-05:
Harness side

A-06: Harness side

A-06 (Black)

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-40

STEP 11. 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 19.

NO : 

Repair the damaged connector.

STEP 12. Connector check: A-05 ASC-ECU 
connector, B-41 intermediate connector, C-17 
wheel speed sensor <RL> connector

Q: Is the check result normal?

YES : 

Go to Step 21.

NO : 

Repair the damaged connector.

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)

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601092

Connector: B-41

AB

AC601094

Connector: C-17

AB

C-17(Black)

Harness side

Main

Index

Group

TOC