Mitsubishi Montero (2004+). Manual - part 1104

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-127

DIAGNOSIS 

Required Special Tools:

• MB991223: Harness Set

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

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-128

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-129

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

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-130

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