Mitsubishi Montero (2004+). Manual — part 1114

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-167

STEP 33. Check the CAN bus line for short circuit. Check
at intermediate connector E-123.

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 connectors E-123, and G and yaw

rate sensor connector E-126, and measure the resistance
at the female 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.

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 between intermediate connector

E-123 terminals 2 and 6.

• The resistance should be infinite.

Q: Is the resistance infinite?

YES <the resistance is infinite> : Go to Step 34.
NO <the resistance is not infinite> : Repair the wiring

harness wires between intermediate connector E-123
and the G and yaw rate sensor connector.

AC204176

CONNECTOR: E-123

AR

E-123(GR)

2

6

14

7

9 8

10

4

12

3

11

19

16

1817

15

1

5

13

E-123(GR)

AC204175

CONNECTOR: E-126

HARNESS SIDE

E-126(GR)

E-126(GR)

AB

FLOOR
CONSOLE

1

2

4 3

AC204581

FEMALE CONNECTOR: E-122

TEST
HARNESS

AD

TEST
HARNESS

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-168

STEP 34. Replace the G and yaw rate sensor.

After the G and yaw rate sensor is replaced, retest the system.
Q: Has the trouble symptom been eliminated?

YES (the trouble symptom has been eliminated) : The

procedure is complete.

NO (the trouble symptom has not been eliminated) :

Replace the power control module.

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-169

STEP 35. Check intermediate connectors E-122, E-123,
joint connector (9) D-131, data link connector D-117,
resistor connector D-130, power control module connector
D-134, steering wheel sensor connector D-225,
M-ASTC-ECU E-121 and G and yaw rate sensor connector
E-126.

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.

AC204188

CONNECTORS: D-117, D-130, D-131

D-131

BG

HARNESS SIDE

HARNESS SIDE

D-131

D-130

D-130

6

1

9 8

2

7

10

12 11

4

5

3

1
2

HARNESS SIDE

D-117

D-117

21

26

22

27 2829 30

23

31

24

32

25

33

AC204171

CONNECTOR: D-134

HARNESS SIDE

D-134(GR)

D-134(GR)

AE

80

87

73

66

67

65
74

81

75

82

6261

72

68

69

70

71

78

85

77

8483

76

79

86

63

64

8988

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
(4.0 inches)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-170

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: Are intermediate connectors E-122, E-123, joint

connector (9) D-131, data link connector D-117, resistor
connector D-130, power control module connector
D-134, steering wheel sensor connector D-225,
M-ASTC-ECU E-121 and G and yaw rate sensor
connector E-126 in good condition?
YES : Retest the system.
NO : Repair or replace the connector(s).

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5

AC204194

CONNECTORS: E-121, E-122, E-123

E-123(GR)

E-123(GR)

E-122(L)

E-121

HARNESS SIDE

AK

E-121

E-122(L)

2

6

14

7

9 8

10

4

12

3

11

19

16

1817

15

1

5

13

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