Mitsubishi Montero (2002-2004). Manual — part 1126

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-121

AC204170

CONNECTORS: D-117, D-130, D-131

BU

D-117

D-130

D-131

AC204171

CONNECTOR: D-134

AK

D-134(GR)

AC204172

CONNECTOR: D-225

AH

AC204176

CONNECTORS: E-121, E-122, E-123

AQ

E-123(GR)

E-122(L)

E-121

AC204175

CONNECTOR: E-126

AD

E-126(GR)

FLOOR
CONSOLE

M-ASTC DIAGNOSIS

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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-122

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

STEP 1. Check the terminator resistor.

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, which are connected through the
CAN communication lines, may be damaged.
(1) Measure the resistance at data link connector D-117.
(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, which are connected through the CAN
communication lines, may be damaged.
(3) Disconnect the negative battery terminal.

CAUTION

Always use the test harness when measuring the voltage
or resistance value at the female connector. If you fail to do
so, connectors may be damaged.
(4) Measure the resistance between data link connector D-117

terminals 23 and 28.

• The resistance should measure 60 ± 10 ohms.

Q: Does the resistance measure 60

± 10 ohms?

The resistance measures 60

± 10 ohms. : Retest the

system.

The resistance measures 120

± 20 ohms or more : Go to

Step 2.

The resistance measures approximately 120

± 12 ohms

(i.e. terminator resistor at one side, wiring harness or
connector is defective) : Go to Step 13.
The resistance measure less than 60

± 10 ohms : Go to

Step 13.

Other than above : Go to Step 35.

AC204170

CONNECTOR: D-117

HARNESS SIDE

AM

21

26

22

27 2829 30

23

31

24

32

25

33

AC204576

21

26

22

27 2829 30

23

31

24

32

25

33

HARNESS SIDE: D-117

TEST
HARNESS

AB

TEST
HARNESS

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-123

STEP 2. Check 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 joint connector D-131 in good condition?

YES : Go to Step 3.
NO : Repair or replace the connector(s).

AC204170

CONNECTOR: D-131

AT

6

1

9 8

2

7

10

12 11

4

5

3

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
(4.0 inches)

M-ASTC DIAGNOSIS

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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-124

STEP 3. Check the joint connector.
Disconnect joint connector (9), and check the short pin behind
the connector for corrosion, deformation and delamination.
Q: Is joint connector in good condition?

YES : Go to Step 4.
NO : Replace the joint connector.

AC204170

CONNECTOR: D-131

BV

AC204573

4 5

3

12

10

9

11

1 2

6 7 8

JOINT CONNECTOR (9) D-131

AB