Mitsubishi Montero (2004+). Manual — part 1089

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-67

Diagnostic Item 2: Diagnose the CAN_L side 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-68

This procedure diagnoses the shaded portion below.

AC203825 AI

CHECK POINT

G AND
YAW RATE
SENSOR

POWER TRAIN
CONTROL
MODULE

M-ASTC-ECU

STEERING
WHEEL
SENSOR

DATA LINK
CONNECTOR

RESISTOR

CAN_L

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-69

AC204606

Can Bus Communication Circuit

AC204170

CONNECTORS: D-117, D-130, D-131

BU

D-117

D-130

D-131

AC204171

CONNECTOR: D-134

AK

D-134(GR)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-70

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