Mitsubishi Colt Ralliart. Manual - part 624

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-41

STEP 13. Voltage measurement: A-05 ASC-ECU 
connector

(1) Disconnect the connector, connect the ABS 

check harness (Special tool: MB991984) to the 
ASC-ECU side connector and harness-side 
connector, and then measure the voltage at the 
special tool connector side.

(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:

<Power supply terminal> Approximately 12 

V

<Signal terminal> 0.4 to 1.3 V

Q: Is the check result normal?

YES : 

Go to Step 22.

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

Go 

to Step 14.

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

Go 

to Step 16.

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

Go to 

Step 18.

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

Go 

to Step 20.

STEP 14. 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.

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601085AB

MB991984

Check connector

ASC-ECU

ASC-ECU harness 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)

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-42

STEP 15. Wiring harness inspection: between 
A-05 ASC-ECU connector terminal No. 29, 28 and 
A-29 wheel speed sensor <FR> connector 
terminal No. 2, 1.

Check for short and open circuit in wheel speed sen-
sor <FR> circuit

Q: Is the check result normal?

YES : 

Go to Step 22.

NO : 

Repair the wiring harness.

STEP 16. 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.

STEP 17. Check the harness wire between A-05 
ASC-ECU connector terminal No. 34, 13 and A-06 
wheel speed sensor <FL> connector terminal No. 
2, 1.

Check for short and open circuit in wheel speed sen-
sor <FL> circuit

Q: Is the check result normal?

YES : 

Go to Step 22.

NO : 

Repair the wiring harness.

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)

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-43

STEP 18. 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 19. Wiring harness inspection: between 
A-05 ASC-ECU connector terminal No. 30, 8 and 
C-06 wheel speed sensor <RR> connector 
terminal No. 2, 1.

Check for short and open circuit in wheel speed sen-
sor <RR> circuit

Q: Is the check result normal?

YES : 

Go to Step 22.

NO : 

Repair the wiring harness.

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

AC601093

Connector: C-06

AB

Harness side

C-06 (Black)

Main

Index

Group

TOC

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-44

STEP 20. 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.

STEP 21. Wiring harness check: between A-05 
ASC-ECU connector terminal No. 11, 10 and C-17 
wheel speed sensor <RL> connector terminal No. 
2, 1.

Check for short and open circuit in wheel speed sen-
sor <RL> circuit

Q: Is the check result normal?

YES : 

Go to Step 22.

NO : 

Repair the wiring harness.

STEP 22. ABS warning lamp OFF recheck
Drive the vehicle until the vehicle speed reaches 
30km/h and check that the ABS warning lamp goes 
out.

Q: Does the ABS warning lamp extinguish?

YES : 

Go to Step 24.

NO : 

Replace the ASC-ECU, and then go to Step 
23.

STEP 23. ABS warning lamp OFF recheck
Drive the vehicle until the vehicle speed reaches 
30km/h and check that the ABS warning lamp goes 
out.

Q: Does the ABS warning lamp extinguish?

YES : 

Go to Step 24.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Cope with Intermittent 

Malfunction 

P.00-13

.)

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

AC601083

Connector: A-05

AB

A-05(Black)

Harness side

AC601094

Connector: C-17

AB

C-17(Black)

Harness side

Main

Index

Group

TOC