Mitsubishi Montero (2004+). Manual — part 1109

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-147

STEP 19. Check intermediate connector E-122.

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.

CAUTION

If there is a problem in the CAN bus line or the connectors
on the control wiring harness assembly (the wiring har-
ness connected to the M-ASTC-ECU, the power control
module and intermediate connector E-123), do not attempt
to repair the wiring harness or connector(s), but replace
the wiring harness assembly. If a wire is added or the con-
nector(s) are repaired, an error in the CAN communication
may be caused.
Q: Is intermediate connector E-122 in good condition?

YES : Go to Step 20.
NO (If there is a problem at the instrument panel wiring
harness assembly side) : Repair or replace the connector.
NO (If there is a problem at the control wiring harness
assembly side) : Replace the control wiring harness

assembly.

AC204176

CONNECTOR: E-122

E-122(L)

E-122(L)

AD

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
(4.0 inches)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-148

STEP 20. Check the terminator resistor at the resistor side.
Check at intermediate connector E-122.

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) Disconnect intermediate connector E-122, and measure the

resistance at the male intermediate connector (instrument
panel wiring harness side).

(2) Turn the ignition switch to the LOCK (OFF) position.
(3) Disconnect the negative battery terminal.

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.

(4) Measure the resistance between intermediate connector

E-122 terminals 9 and 20.

• The resistance should measure 120 ± 20 ohms.

Q: Does the resistance measure 120

± 20 ohms?

YES : Go to Step 30.
NO (If the resistance is infinite) : Go to Step 21 .
NO (If the resistance measures 2 ohms or less) : Go to

Step 24.

AC204176

CONNECTOR: E-122

E-122(L)

MALE SIDE

E-122(L)

AF

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AC204581

MALE CONNECTOR: E-122

TEST
HARNESS

AC

TEST
HARNESS

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-149

STEP 21. Check the CAN bus line for open circuit. Measure
at joint connector (9) D-131 and data link connector D-117.

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) Disconnect joint connector (9) D-131, and measure the

resistance between joint connector (9) and the data link
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, which are connected through the CAN
communication lines, may be damaged.
(3) Disconnect the negative battery terminal.

AC204188

CONNECTORS: D-117, D-131

D-131

BF

HARNESS SIDE

HARNESS SIDE

D-131

D-117

D-117

6

1

9 8

2

7

10

12 11

4

5

3

21

26

22

27 2829 30

23

31

24

32

25

33

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-150

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 values between joint connector (9)

D-131 terminal 7 and data link connector D-117 terminal 23,

and between joint connector (9) D-131 terminal 12 and data
link connector D-117 terminal 28.

• The resistance should measure 2 ohms or less.

CAUTION

If you repair the CAN bus line of the instrument panel wir-
ing 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 harness connected to the G and yaw rate sen-
sor connector and intermediate connector E-123), observe
the precautions regarding how to repair wiring harness. If
a new wire is added or a splice point is modified for the
CAN_L or CAN_H line, an error in the CAN communication
may be caused.
Q: Does the resistance measure 2 ohms or less?

YES : Go to Step 22.
NO : Repair the wiring harness wires between joint

connector (9) and the data link connector.

AC204582

HARNESS SIDE: D-131

HARNESS SIDE: D-117

TEST
HARNESS

AB

TEST
HARNESS

6

1

9 8

2

7

10

12 11

4

5

3

21

26

22

27 2829 30

23

31

24

32

25

33

AC204582

HARNESS SIDE: D-131

HARNESS SIDE: D-117

TEST
HARNESS

TEST
HARNESS

AC

6

1

9 8

2

7

10

12 11

4

5

3

21

26

22

27 2829 30

23

31

24

32

25

33