Mitsubishi Montero (2002-2004). Manual - part 1130

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-137

STEP 14. Check the joint connector.
Disconnect joint connector (9), and check the short pin behind 
the connector for corrosion, deformation and delamination.
Q: Is joint connector in good condition?

YES : Go to Step 15.
NO :  Replace the joint connector.

AC204170

CONNECTOR: D-131

BV

AC204573

4 5

3

12

10

9

11

1 2

6 7 8

JOINT CONNECTOR (9) D-131

AB

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-138

STEP 15. Check resistor connector D-130.

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.
Q: Is resistor connector D-130 in good condition?

YES : Go to Step 16.
NO :  Repair or replace the connector(s).

AC204170

CONNECTOR: D-130

HARNESS SIDE

AQ

1
2

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
 (4.0 inches)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-139

STEP 16. Check the terminator resistor. Measure at 
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.
(1) Disconnect resistor connector D-130, and measure the 

resistance at the component-side connector.

(2) Measure the resistance between resistor connector D-130 

terminals 1 and 2.

• The resistance should measure 120 ± 20 ohms.

Q: Does the resistance measure 120 

± 20 ohms?

YES : Go to Step 17.
NO :  Replace the resistor.

STEP 17. Check M-ASTC-ECU connector E-121.

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: Is M-ASTC-ECU connector E-121 in good condition?

YES : Go to Step 18.
NO :  Replace the control wiring harness assembly.

AC204170

CONNECTOR: D-130

COMPONENT  
SIDE

AS

1
2

AC204579

1
2

COMPONENT SIDE: D-130

TEST 
HARNESS

AB

TEST 
HARNESS

AC204176

CONNECTOR: E-121

HARNESS SIDE

AC

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-140

STEP 18. Check the terminator resistor inside the M-ASTC-
ECU. Measure at M-ASTC-ECU connector E-121.

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 M-ASTC-ECU connector E-121, and measure 

the resistance at the component-side connector.

(2) Measure the resistance between M-ASTC-ECU connector 

E-121 terminals 83 and 84.

• The resistance should measure 120 ± 20 ohms.

Q: Does the resistance measure 120 

± 20 ohms?

YES : Go to Step 19.
NO :  Replace the M-ASTC-ECU.

AC204176

CONNECTOR: E-121

COMPONENT 
SIDE

AE

76

82

87

75

81

86

74

80

85

73

79

72

78

84

71

77

83

AC204581

COMPONENT SIDE: E-121

TEST 
HARNESS

AB

TEST 
HARNESS

76

82

87

75

81

86

74

80

85

73

79

72

78

84

71

77

83