Mitsubishi Montero (2004+). Manual - part 1097

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-99

DIAGNOSIS 

Required Special Tools:

• MB991223: Harness Set

AC204172

CONNECTOR: D-225

AH

AC204176

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

AQ

E-123(GR)

E-122(L)

E-121

AC204175

CONNECTOR: E-126

AD

E-126(GR)

FLOOR 
CONSOLE

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-100

STEP 1. Check joint connector (9) D-131.

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 joint connector D-131 in good condition?

YES : Go to Step 2.
NO :  Repair or replace the connector(s).

AC204170

CONNECTOR: D-131

AT

6

1

9 8

2

7

10

12 11

4

5

3

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
 (4.0 inches)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-101

STEP 2. 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 3.
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-102

STEP 3. Check intermediate connector E-122.

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.
Q: Is intermediate connector E-122 in good condition?

YES : Go to Step 4.
NO (If there is a problem at the instrument panel wiring 
harness assembly side) : Repair or replace the connector.
NO (If there is a problem at the control wiring harness 
assembly side) : Replace the control wiring harness 

assembly.

AC204176

CONNECTOR: E-122

E-122(L)

E-122(L)

AD

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
 (4.0 inches)