Mitsubishi Montero (2004+). Manual - part 1098

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-103

STEP 4. Measure the voltage in the CAN_H line. 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 

voltage at the female intermediate connector (control wiring 
harness side).

(2) Turn the ignition switch to the "ON" position.

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.
(3) Measure the voltage between intermediate connector 

E-122 terminal 9 and body ground.

• The voltage should measure 0.5 volts or more, or 4.5 

volts or less.

Q: Does the voltage measure 0.5 volts or more, or 4.5 volts 

or less?
YES : Go to Step 5.
NO :  Go to Step 15.

AC204176

CONNECTOR: E-122

E-122(L)

FEMALE SIDE

E-122(L)

AG

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

AC204580

FEMALE CONNECTOR: E-122

AD

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

TEST 
HARNESS

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-104

STEP 5. Measure the voltage in the CAN_H line. 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 steering 

wheel sensor connector D-225, and measure the voltage at 
the male intermediate connector (instrument panel wiring 
harness side).

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between intermediate connector 

E-122 terminal 9 and body ground.

• The voltage should measure one volt or less.

Q: Do the voltage measure one volt or less?

YES : Go to Step 10.
NO :  Go to Step 6.

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5

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

AC204580

MALE CONNECTOR: E-122

AE

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-105

STEP 6. Measure the voltage in the CAN_H line. Measure 
the voltage at joint connector (9) D-131.

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 

voltage at joint connector (9).

(2) Turn the ignition switch to the "ON" position.

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.
(3) Measure the voltage between joint connector (9) D-131 

terminal 7 and body ground.

• The voltage should measure one volt 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: Do the voltage measure one volt or less?

YES : Go to Step 7.
NO :  Repair the wiring harness wires between joint 

connector (9) and the data link connector.

AC204170

CONNECTOR: D-131

AT

6

1

9 8

2

7

10

12 11

4

5

3

AC204580

HARNESS SIDE: D-131

AL

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-106

STEP 7. Measure the voltage in the CAN_H line. Measure 
the voltage at joint connector (9) D-131.

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 voltage at joint connector (9).

(2) Turn the ignition switch to the "ON" position.

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.
(3) Measure the voltage between joint connector (9) D-131 

terminal 1 and body ground.

• The voltage should measure one volt 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: Do the voltage measure one volt or less?

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

AC204580

HARNESS SIDE: D-131

AG

TEST 
HARNESS

6

1

9 8

2

7

10

12 11

4

5

3