Mitsubishi Montero (2004+). Manual — part 1106

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-135

STEP 9. Check the terminator resistor inside the
M-ASTC-ECU. 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 measure the

resistance at the female intermediate connector (control
wiring harness side).

(2) Turn the ignition switch to the LOCK (OFF) position.

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.
(3) Disconnect the negative battery terminal.

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 terminals 9 and 20.

• The resistance should measure 120 ± 20 ohms.

Q: Does the resistance measure 120

± 20 ohms?

YES : Go to Step 10.
NO : Replace the control wiring harness assembly.

AC204176

CONNECTOR: E-122

E-122(L)

FEMALE SIDE

E-122(L)

AG

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10

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9

20

8

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7

18

6

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5

16

4

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14

2

13

1

12

AC204581

FEMALE CONNECTOR: E-122

TEST
HARNESS

AD

TEST
HARNESS

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M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-136

STEP 10. Check the CAN bus line for open circuit. Measure
at joint connector (9) D-131 and data link connector D-117.

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 joint connector (9) D-131, and measure the

resistance between joint connector (9) and the data link
connector.

(2) Turn the ignition switch to the LOCK (OFF) position.

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.
(3) Disconnect the negative battery terminal.

AC204188

CONNECTORS: D-117, D-131

D-131

BF

HARNESS SIDE

HARNESS SIDE

D-131

D-117

D-117

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9 8

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12 11

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M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-137

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 values between joint connector (9)

D-131 terminal 7 and data link connector D-117 terminal 23,

and between joint connector (9) D-131 terminal 12 and data
link connector D-117 terminal 28.

• The resistance should measure 2 ohms or less.

CAUTION

If you repair the CAN bus line of the instrument panel wir-
ing 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 harness connected to the G and yaw rate sen-
sor 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.
Q: Does the resistance measure 2 ohms or less?

YES : Go to Step 11.
NO : Repair the wiring harness wires between joint

connector (9) and the data link connector.

AC204582

HARNESS SIDE: D-131

HARNESS SIDE: D-117

TEST
HARNESS

AB

TEST
HARNESS

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9 8

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12 11

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3

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27 2829 30

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AC204582

HARNESS SIDE: D-131

HARNESS SIDE: D-117

TEST
HARNESS

TEST
HARNESS

AC

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M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-138

STEP 11. Check the CAN bus line for open circuit. Measure
at joint connector (9) D-131 and 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.

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 joint connector (9) D-131 and resistor connector

D-130, and measure the resistance between joint connector
(9) and the resistor connector.

(2) Turn the ignition switch to the LOCK (OFF) position.

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.
(3) Disconnect the negative battery terminal.

AC204188

CONNECTORS: D-130, D-131

D-131

AQ

HARNESS SIDE

HARNESS SIDE

D-131

D-130

D-130

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9 8

2

7

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12 11

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5

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1
2