Mitsubishi Montero (2002-2004). Manual — part 1098

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-9

STEP 2. Check the active skid control switch continuity.
(1) Remove the active skid control switch (Refer to

P.35A-

132

.).

(2) Connect an ohmmeter between to active skid control switch

connector terminals.

Q: Is the active skid control switch in good condition?

YES : Go to Step 3.
NO : Replace the active skid control switch, and then go to

Step 9.

ACTIVE SKID
CONTROL
SWITCH
CONDITION

TESTER
CONNECTION

SPECIFIED
CONDITION

ON

3

− 6

Less than 2 ohms

2

− 3, 2 - 6

Open circuit

Neutral

2

− 3, 2 − 6, 3 − 6 Open circuit

OFF

2

− 3

Less than 2 ohms

2

− 6, 3 - 6

Open circuit

AC204176

CONNECTOR: E-125

3

1

4

5

6

2

HARNESS SIDE

AH

AC204445

6

2

5

4

3

1

AB

ON

OFF

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-10

STEP 3. Check the ground to the active skid control
switch. Measure the resistance at active skid control
switch connector E-125.
(1) Disconnect active skid control switch connector E-125, and

measure the resistance at the harness-side connector.

(2) Measure the resistance between active skid control switch

connector E-125 terminal 3 and body ground.

• The resistance should measure 2 ohms or less.

Q: Does the resistance measure 2 ohms or less?

YES : Go to Step 5.
NO : Go to Step 4.

STEP 4. Check the wiring harness between active skid
control switch connector E-125 terminal 3 and the body
ground.
NOTE: Also check intermediate connector E-06 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector E-06 is damaged, repair or
replace the damaged component(s) as described in GROUP
00E, Harness Connector Inspection

P.00E-2

. If the connector

has been repaired or replaced, go to STEP 9.
Q: Is the wiring harness between active skid control switch

connector E-125 terminal 3 and the body ground in
good condition?
YES : Go to Step 9.
NO : Repair the wiring harness, and then go to Step 9.

AC204176

CONNECTOR: E-125

3

1

4

5

6

2

HARNESS SIDE

AH

AC204581

HARNESS SIDE: E-125

AU

3

1

4

5

6

2

AC204194

CONNECTORS: E-06, E-125

E-125

E-06

E-125

HARNESS SIDE

AD

E-06

3

1

4

5

6

2

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-11

STEP 5. Check the wiring harness between M-ASTC-ECU
connector E-121 terminal 78 and the body ground.
NOTE: Also check intermediate connector E-06 and E-122 for
loose, corroded, or damaged terminals, or terminals pushed
back in connectors. If intermediate connector E-06 or E-122 is
damaged, repair or replace the damaged component(s) as
described in GROUP 00E, Harness Connector Inspection

P.00E-2

. If the connector has been repaired or replaced, go to

STEP 9.
Q: Is the wiring harness between M-ASTC-ECU connector

E-121 terminal 78 and the body ground in good
condition?
YES : Go to Step 6.
NO : Go to Step 7.

STEP 6. Check the wiring harness between active skid
control switch connector E-125 terminal 6 and M-ASTC-
ECU connector E-121 terminal 78.
NOTE: Also check intermediate connector E-06 and E-122 for
loose, corroded, or damaged terminals, or terminals pushed
back in connectors. If intermediate connector E-06 or E-122 is
damaged, repair or replace the damaged component(s) as
described in GROUP 00E, Harness Connector Inspection

P.00E-2

. If the connector has been repaired or replaced, go to

STEP 9.
Q: Is the wiring harness between active skid control switch

connector E-125 terminal 6 and M-ASTC-ECU connector
E-121 terminal 78 in good condition?
YES : Go to Step 7.
NO : Repair the wiring harness, and then go to Step 9.

AC204194

CONNECTORS: E-06, E-121, E-122, E-125

E-125

E-06

E-121

E-125

E-122(L)

HARNESS SIDE

HARNESS SIDE

AE

E-121

E-06

E-122(L)

3

1

4

5

6

2

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

71

77

83

72

78

84

73

79

85

74

80

75

81

86

76

82

87

AC204194

CONNECTORS: E-06, E-121, E-122, E-125

E-125

E-06

E-121

E-125

E-122(L)

HARNESS SIDE

HARNESS SIDE

AE

E-121

E-06

E-122(L)

3

1

4

5

6

2

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

71

77

83

72

78

84

73

79

85

74

80

75

81

86

76

82

87

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-12

STEP 7. Check the wiring harness between M-ASTC-ECU
connector E-121 terminal 85 and the body ground.
NOTE: Also check intermediate connector E-06 and E-122 for
loose, corroded, or damaged terminals, or terminals pushed
back in connectors. If intermediate connector E-06 or E-122 is
damaged, repair or replace the damaged component(s) as
described in GROUP 00E, Harness Connector Inspection

P.00E-2

. If the connector has been repaired or replaced, go to

STEP 9.
Q: Is the wiring harness between M-ASTC-ECU connector

E-121 terminal 85 and the body ground in good
condition?
YES : Go to Step 9.
NO : Go to Step 8.

STEP 8. Check the wiring harness between active skid
control switch connector E-125 terminal 2 and M-ASTC-
ECU connector E-121 terminal 85.
NOTE: Also check intermediate connector E-06 and E-122 for
loose, corroded, or damaged terminals, or terminals pushed
back in connectors. If intermediate connector E-06 or E-122 is
damaged, repair or replace the damaged component(s) as
described in GROUP 00E, Harness Connector Inspection

P.00E-2

. If the connector has been repaired or replaced, go to

STEP 9.
Q: Is the wiring harness between active skid control switch

connector E-125 terminal 2 and M-ASTC-ECU connector
E-121 terminal 85 in good condition?
YES : Replace the M-ASTC-ECU, and then go to Step 9.
NO : Repair the wiring harness, and then go to Step 9.

AC204194

CONNECTORS: E-06, E-121, E-122, E-125

E-125

E-06

E-121

E-125

E-122(L)

HARNESS SIDE

HARNESS SIDE

AE

E-121

E-06

E-122(L)

3

1

4

5

6

2

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

71

77

83

72

78

84

73

79

85

74

80

75

81

86

76

82

87

AC204194

CONNECTORS: E-06, E-121, E-122, E-125

E-125

E-06

E-121

E-125

E-122(L)

HARNESS SIDE

HARNESS SIDE

AE

E-121

E-06

E-122(L)

3

1

4

5

6

2

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

71

77

83

72

78

84

73

79

85

74

80

75

81

86

76

82

87