Mitsubishi Montero (2004+). Manual - part 1102

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-119

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-122 terminal 9 and body ground.

• The resistance should be infinite.

Q: Is the resistance infinite?

YES : Go to Step 17.
NO :  Replace the control wiring harness assembly.

AC204581

FEMALE CONNECTOR: E-122

AI

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TEST 
HARNESS

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-120

STEP 17. 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 connector E-122 and 

M-ASTC-ECU connector E-121, 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 : Replace the M-ASTC-ECU.
NO :  Go to Step 18.

AC204194

CONNECTORS: E-121, E-122

E-121

HARNESS SIDE

E-121

E-122(L)

FEMALE CONNECTOR

AH

E-122(L)

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AC204580

FEMALE CONNECTOR: E-122

AD

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TEST 
HARNESS

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-121

STEP 18. 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 connector E-122 and power 

control module connector D-134, 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 : Replace the power control module.
NO :  Go to Step 19.

AC204171

CONNECTOR: D-134

HARNESS SIDE

D-134(GR)

D-134(GR)

AE

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AC204176

CONNECTOR: E-122

E-122(L)

FEMALE SIDE

E-122(L)

AG

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AC204580

FEMALE CONNECTOR: E-122

AD

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TEST 
HARNESS

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-122

STEP 19. 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 connector E-122 and G and yaw 

rate sensor connector E-126, 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 : Replace the G and yaw rate sensor.
NO :  Go to Step 20.

AC204176

CONNECTOR: E-122

E-122(L)

FEMALE SIDE

E-122(L)

AG

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AC204175

CONNECTOR: E-126

HARNESS SIDE

E-126(GR)

E-126(GR)

AB

FLOOR 
CONSOLE

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4 3

AC204580

FEMALE CONNECTOR: E-122

AD

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TEST 
HARNESS