Mitsubishi Montero (2004+). Manual - part 1103

 

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Mitsubishi Montero (2004+). Manual - part 1103

 

 

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-123

STEP 20. Measure the voltage in the CAN_H line. Check at 
intermediate connector E-122.

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-122 and E-123 and 

power control module connector D-123, and measure the 
voltage at the female intermediate connector (control wiring 
harness side).

(2) Turn the ignition switch to the "ON" position.

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.
(3) Measure the voltage between intermediate connector 

E-122 terminal 9 and body ground.

• The voltage should measure 0.5 volts or more, or 4.5 

volts or less.

Q: Does the voltage measure 0.5 volts or more, or 4.5 volts 

or less?
YES : 
Go to Step 21.
NO :  Replace the control wiring harness assembly.

AC204194

CONNECTORS: E-122, E-123

E-123(GR)

E-123(GR)

E-122(L)

HARNESS SIDE

AY

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

AC204580

FEMALE CONNECTOR: E-122

AD

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

TEST 
HARNESS

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-124

STEP 21. Check intermediate connector E-123.

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-123 in good condition?

YES : Repair the wiring harness wires between intermediate 

connector E-123 and the G and yaw rate sensor 
connector.

NO (If there is a problem at the transmission 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-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)

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
 (4.0 inches)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-125

Diagnostic Item 4: Diagnose the terminator resistor and the CAN main bus line

CAUTION

Before checking CAN bus lines and their inter-
connected components, "ground" yourself, by 
touching a metal object such as an unpainted 
pipe, this will discharge any potentially damag-
ing 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 multimeter, the equipments, which 
are connected through the CAN communication 
lines, may be damaged.

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.

CAUTION

Always use the test harness when measuring the 
voltage or resistance value at the female connec-
tor. If you fail to do so, connectors may be dam-
aged.

CAUTION

If there is a problem in the connector(s) (includ-
ing terminals) 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 trans-
mission 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 you repair the CAN bus line of the instrument 
panel wiring harness assembly (the wiring har-
ness connected to the steering wheel sensor, the 
data link connector and the resistor) and the 
transmission wiring harness assembly (the wir-
ing harness connected to the G and yaw rate 
sensor connector and intermediate connector 
E-123), observe the precautions regarding how to 
repair wiring harness. If a new wire is added or a 
splice point is modified for the CAN_L or CAN_H 
line, an error in the CAN communication may be 
caused.

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 
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 connector(s) are repaired, an error 
in the CAN communication may be caused.

AC203824

CONNECTOR

TWISTED WIRE

AB

10 cm
 (4.0 inches)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-126

This procedure diagnoses the shaded portion below.

AC203825AB

CHECK POINT

G AND 
YAW RATE
SENSOR

POWER TRAIN
CONTROL 
MODULE

M-ASTC-ECU

STEERING 
WHEEL 
SENSOR

DATA LINK
CONNECTOR

RESISTOR

CAN Bus Communication Circuit (main bus line)

 

 

 

 

 

 

 

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