Mitsubishi Montero (2002-2004). Manual - part 1136

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-161

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-162

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.

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

AC204172

CONNECTOR: D-225

HARNESS SIDE

AD

3 2

1

4

5

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-163

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.

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

AC204175

CONNECTOR: E-126

HARNESS SIDE

E-126(GR)

E-126(GR)

AB

FLOOR 
CONSOLE

1

2

4 3

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
 (4.0 inches)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-164

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).

Diagnostic Item 5:  CAN bus line diagnostics (between the main bus line and the power control 
module)

CAUTION

Prior to this diagnosis procedure, diagnose the 
CAN main bus line.

CAUTION

If there is a problem in the CAN bus line or the 
connectors on the control wiring harness assem-
bly (the wiring harness connected to the M-
ASTC-ECU, the power control module and inter-
mediate 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 connector(s) are repaired, an error 
in the CAN communication may be caused.
This procedure diagnoses the shaded portion below.

AC203825AE

PROBABLE
TROUBLE
SPOT

G AND 
YAW RATE
SENSOR

POWER TRAIN
CONTROL 
MODULE

M-ASTC-ECU

STEERING 
WHEEL 
SENSOR

DATA LINK
CONNECTOR

RESISTOR