Mitsubishi Montero (2004+). Manual - part 1110

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-151

STEP 22. Check the CAN bus line for open circuit. Measure 
at joint connector (9) D-131 and resistor connector D-130.

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 resistor connector 

D-130, and measure the resistance between joint connector 
(9) and the resistor 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-130, D-131

D-131

AQ

HARNESS SIDE

HARNESS SIDE

D-131

D-130

D-130

6

1

9 8

2

7

10

12 11

4

5

3

1
2

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-152

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 1 and resistor connector D-130 terminal 1, 

and between joint connector (9) D-131 terminal 4 and 
resistor connector D-130 terminal 2.

• 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 23.
NO :  Repair the wiring harness wires between joint 

connector (9) and the resistor connector.

AC204582

HARNESS SIDE: D-131

AF

HARNESS SIDE: D-130

TEST 
HARNESS

1
2

TEST 
HARNESS

6

1

9 8

2

7

10

12 11

4

5

3

AC204582

HARNESS SIDE: D-131

AG

HARNESS SIDE: D-130

TEST 
HARNESS

1
2

TEST 
HARNESS

6

1

9 8

2

7

10

12 11

4

5

3

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-153

STEP 23. Check the CAN bus line for open circuit. Measure 
at joint connector (9) D-131 and 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.
(1) Disconnect joint connector (9) D-131 and intermediate 

connector E-122, and measure the resistance between joint 
connector (9) and the male intermediate connector (at the 
instrument panel wiring harness side).

(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.

AC204170

CONNECTOR: D-131

AU

COMPONENT 
SIDE

4 5

3

12

10

9

11

1 2

6 7 8

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

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-154

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 6 and intermediate connector E-122 

terminal 9, and between joint connector (9) D-131 terminal 
11 and intermediate connector E-122 terminal 20.

• 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 : Retest the system.
NO :  Repair the wiring harness wires between joint 

connector (9) and the intermediate connector.

AC204582

MALE CONNECTOR: E122

AJ

HARNESS SIDE: D-131

TEST 
HARNESS

TEST 
HARNESS

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

6

1

9 8

2

7

10

12 11

4

5

3

AC204582

MALE CONNECTOR: E122

AK

HARNESS SIDE: D-131

TEST 
HARNESS

TEST 
HARNESS

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

6

1

9 8

2

7

10

12 11

4

5

3