Mitsubishi Montero (2002-2004). Manual - part 1138

 

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Mitsubishi Montero (2002-2004). Manual - part 1138

 

 

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-169

This procedure diagnoses the shaded portion below.

AC203825AF

PROBABLE
TROUBLE
SPOT

G AND 
YAW RATE
SENSOR

POWER TRAIN
CONTROL 
MODULE

M-ASTC-ECU

STEERING 
WHEEL 
SENSOR

DATA LINK
CONNECTOR

RESISTOR

CAN Bus Communication Circuit (steering wheel sensor)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-170

.

CIRCUIT OPERATION
The M-ASTC-ECU receives signals through the CAN 
bus line from the steering wheel sensor.

.

TECHNICAL DESCRIPTION (COMMENT)
If the M-ASTC-ECU has set DTC code 67, the wiring 
harness between the CAN main bus line and the 
steering wheel sensor, the steering wheel sensor 
itself or the M-ASTC-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The CAN bus line between the CAN main bus 

line and the steering wheel sensor is defective.

• Damaged connector(s)

• The steering wheel sensor is defective.

• The M-ASTC-ECU is defective.

AC204170

CONNECTOR: D-131

BV

AC204172

CONNECTOR: D-225

AH

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-171

DIAGNOSIS 

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

STEP 1. Check steering wheel sensor connector D-225 and 
joint connector (9) D-131.

CAUTION

If there is a problem in the connector(s) (including termi-
nals) or wire(s) of the instrument panel wiring harness 
assembly (the wiring harness connected to the steering 
wheel sensor, the data link connector and the resistor) and 
the transmission wiring harness assembly (the wiring har-
ness connected to the G and yaw rate sensor connector 
and intermediate connector E-123), cut and repair the 
defective wire so that the frayed end of the twisted wire 
should be within 10 cm (4.0 inches). If it exceeds 10 cm (4.0 
inches), twist the wiring harness just like the original 
twisted wire. If the frayed end exceeds 10 cm (4.0 inches), 
a communication error may be caused.
Q: Is steering wheel sensor connector D-225 and joint 

connector (9) D-131 in good condition?
YES : 
Go to Step 2.
NO :  Repair or replace the connector.

AC204170

CONNECTOR: D-131

AT

6

1

9 8

2

7

10

12 11

4

5

3

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
 (4.0 inches)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-172

STEP 2. Check the CAN bus line for open circuit. Measure 
at joint connector (9) D-131 and steering wheel sensor 
connector D-225.

CAUTION

Before checking CAN bus lines and their interconnected 
components, "ground" yourself, by touching a metal 
object such as an unpainted pipe, this will discharge any 
potentially damaging static that may have built up.

CAUTION

When measuring resistance value or voltage in CAN bus 
lines, use a digital multimeter. If not using a digital multim-
eter, the equipments connected through the CAN bus lines 
may be damaged.
(1) Disconnect joint connector (9) D-131 and steering wheel 

sensor connector D-225, and measure the resistance 
between joint connector (9) and the steering wheel sensor 
connector.

(2) Turn the ignition switch to the LOCK (OFF) position.

CAUTION

Disconnect the negative battery terminal when measuring 
the resistance value in the CAN bus line. If you fail to do 
so, the equipments connected through the CAN bus lines 
may be damaged.
(3) Disconnect the negative battery terminal.

AC204170

CONNECTOR: D-131

AT

6

1

9 8

2

7

10

12 11

4

5

3

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5

 

 

 

 

 

 

 

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