Mitsubishi Montero (2002-2004). Manual - part 1131

 

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Mitsubishi Montero (2002-2004). Manual - part 1131

 

 

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-141

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.

• 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-142

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       .

• 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-143

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-144

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

 

 

 

 

 

 

 

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