Mitsubishi Montero (2002-2004). Manual - part 1105

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-37

STEP 11. Replace the steering wheel sensor.
Replace the steering wheel sensor, and check that the DTC 
sets.
Q: Does the M-ASTC-ECU set any DTC?

YES : Replace the M-ASTC-ECU, and then go to Step 12.
NO :  The procedure is complete.

STEP 12. Recheck for diagnostic trouble code.
Q: Does DTC 66, 68 or 83 reset?

YES : Return to Step 1.
NO :  The procedure is complete.

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-38

DTC 67: Communication error in steering wheel sensor

CAUTION

If the diagnostic trouble code(s), which indicate a 
communication error in the steering wheel sen-
sor, has been set, diagnose the CAN main bus 
line.

AC205072

Steering Wheel Sensor Communication Circuit

AB

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-39

.

CIRCUIT OPERATION
The M-ASTC-ECU gathers information regarding the 
steering operation, through the CAN bus line from 
the steering wheel sensor.

.

M-ASTC DTC SET CONDITION
DTC 67 is set if the M-ASTC-ECU cannot gather 
information from the steering wheel sensor at all.

.

TROUBLESHOOTING HINTS
The most likely causes for DTC 67 to set are:

• The CAN bus line is defective.

• Damaged connector(s)

• The steering wheel sensor is defective.

• The M-ASTC-ECU is defective.

DIAGNOSIS 

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

STEP 1. Diagnose CAN main bus line.

CAUTION

If DTC 67 is set, diagnose the CAN main bus line.
Diagnose the CAN main bus line. Refer to 

P.35C-60

.

Q: Have you completed checking or repairing the CAN 

main bus line?
YES : 

• If the CAN main bus line is repaired, go to Step 11    

.

• If the CAN main bus line is not defective, go to 

Step 2.

NO :  Diagnose the CAN main bus line. Refer to 

P.35C-60

.

AC204170

CONNECTORS: D-02, D-28

BI

D-28

D-02

AC204172

CONNECTOR: D-225

AH

AC204173

CONNECTORS: D-208, D-210

D-208

D-210

AR

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-40

STEP 2. Using scan tool MB991502, check data list item 25.

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector 

(16-pin).

(2) Turn the ignition switch to the "ON" position.
(3) When the steering wheel is turned, data list item 25 should 

change.

Q: When the steering wheel is turned, does data list item 

25 change?
YES : Go to Step 10.
NO :  Go to Step 3.

STEP 3. Check steering wheel sensor connector D-225.
Q: Is steering wheel sensor connector D-225 in good 

condition?
YES : Go to Step 11.
NO :  Repair or replace the connector, and then go to Step 

11.

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5