Mitsubishi Montero (2004+). Manual — part 1082

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-39

STEP 8. Check the steering wheel sensor for ground
circuit. Measure at steering wheel sensor connector D-225.

(1) Disconnect steering wheel sensor connector D-225, and

measure the resistance at the harness-side connector.

(2) Measure the resistance between steering wheel sensor

connector D-225 terminal 5 and body ground.

• The resistance should measure 2 ohms or less.

Q: Does the resistance measure 2 ohms or less?

YES : Go to Step 11.
NO : Go to Step 9.

STEP 9. Check steering wheel sensor connector D-225.

Q: Is steering wheel sensor connector D-225 in good

condition?
YES : Go to Step 10.
NO : Repair or replace the connector, and then go to Step

12.

STEP 10. Check the wiring harness between steering
wheel sensor connector D-225 terminal 5 and the body
ground.

Q: Is the wiring harness between steering wheel sensor

connector D-225 terminal 5 and the body ground in
good condition?
YES : Go to Step 12.
NO : Repair the wiring harness, and then go to Step 12.

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5

AC204581

3 2

1

4

5

HARNESS SIDE: D-225

AV

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-40

STEP 11. Replace the steering wheel sensor (Recheck for
diagnostic trouble code).

Replace the steering wheel sensor, and check that the DTC
sets.
Q: Does DTC 66, 68 or 83 reset?

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-41

DTC 67: Communication error in steering wheel sensor

CAUTION

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

AC205072

Steering Wheel Sensor Communication Circuit

AB

AC204170

CONNECTORS: D-02, D-28

BI

D-28

D-02

AC204172

CONNECTOR: D-225

AH

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-42

.

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:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

• MB991223: Harness Set

STEP 1. CAN main bus line diagnostics

CAUTION

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

P.35C-61

.

If the CAN main bus line is repaired, check that the diagnostic
trouble code resets.
Q: Have you completed checking or repairing the CAN

main bus line?
YES (If the CAN main bus line is repaired) : If the CAN

main bus line is repaired, go to Step 11.

YES (If the CAN main bus line is not defective) : If the

CAN main bus line is not defective, go to Step 2.

NO : Diagnose the CAN main bus line. Refer to

P.35C-61

.

AC204173

CONNECTORS: D-208, D-210

D-208

D-210

AR