Mitsubishi Outlander XL. Manual — part 1131

Tool

Tool number and
name

Supersession

Application

YB9912230000

Do not use

a

b

c

d

MB991223

a.

MB991219

b.

MB991220

c.

MB991221

d.

MB991222

Harness set

a.

Test harness

b.

LED harness

c.

LED

harness

adaptor

d.

Probe

General service tools Continuity check and voltage

measurement at harness wire or
connector for loose, corroded or
damaged terminals, or terminals
pushed back in the connector.

a.

Connector

pin

contact

pressure inspection

b.

Power circuit inspection

c.

Power circuit inspection

d.

Commercial tester connection

MB992006

MB992006
Extra fine probe

-

Continuity check and voltage
measurement at harness wire or
connector for loose, corroded or
damaged terminals, or terminals
pushed back in the connector.

MB991970

MB991970
ABS check harness

-

Measure

the

voltage

and

resistance at the ABS-ECU

MB991952

MB991952
ABS check harness

-

Measure

the

voltage

and

resistance at the ASC-ECU

TEST EQUIPMENT

M15408300043USA0000010000

Test equipment

Name

Use

ZC3000010000

Digital multimeter

Checking CAN bus circuit (for resistance and voltage
measurements)

CONTROLLER AREA NETWORK (CAN)

54D-7

TEST EQUIPMENT

SERVICE PRECAUTIONS

M15408300021USA0000010000

Warnings in diagnosis section

Details regarding warnings

When servicing a CAN bus line, ground yourself
by touching a metal object such as an unpainted
water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.

-

A digital multimeter should be used.

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.

When measuring the resistance, disconnect the
negative battery terminal.

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.

The test wiring harness should be used.

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.

The strand end of the twist wire should be within
10 cm from the connector.

ZC3002540000

10 cm
(4.0 inches)

Twisted wire

Connector

If you repair the wire due to a defective connector
or its terminal or harness wire, you should cut the
wire so that the strand end of the twist wire should
be within 10 cm (4 inches) from the connector as
shown. If it exceeds 10 cm (4 inches), twist the
wiring harness just like the original twisted wire.
If the strand end exceeds 10 cm (4 inches), a
communication error may be caused.

Strictly observe the specified wiring harness
repair procedure.

When you repair a CAN bus line, observe the
precautions on how to repair the CAN bus line
strictly. Refer to P.54D-9. 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.

54D-8

CONTROLLER AREA NETWORK (CAN)

SERVICE PRECAUTIONS

PRECAUTIONS ON HOW TO REPAIR THE CAN BUS LINES

M15408300019USA0000010000

PRECAUTIONS ON HOW TO REPAIR THE CAN BUS LINES

ZC3002550000

ADDED WIRE

NO GOOD

ZC3002540000

10 cm
(4.0 inches)

Twisted wire

Connector

ZC3002560000

Terminator resistor

Terminator resistor

Open
circuit
point

Open
circuit
point

ECU

ECU

ECU

ECU

<GOOD>

<NO GOOD>

｠

If the CAN bus line(s) are repaired, renew all the twisted wires
between the end connectors. If the wiring harness is partially
repaired, or only CAN_L or CAN_H line is repaired, noise
suppression is deteriorated, causing a communication error.

｠

If the connector or wire on the main bus line or the sub-bus
wire is replaced, the frayed end of the twisted wire should be
within 10 cm (4 inches) from the connector. If it exceeds 10
cm (4 inches), twist the wiring harness just like the original
twisted wire. If the frayed end exceeds 10 cm (4 inches), noise
suppression is deteriorated, causing a communication error.

｠

If a sub-bus line is repaired, splice a new wire directly into the
main bus line. If a new wire is spliced into the sub-bus line,
which is connected to another device, the CAN
communication will be disabled.

PRECAUTIONS ON HOW TO REPAIR THE
TERMINATOR RESISTOR
If one-side terminator resistor is broken, the CAN
communication will continue although noise

suppression is deteriorated. No diagnostic trouble
code may be set even if the terminator resistor was
broken. If a damage is found, replace the ECU which
incorporates the defective terminator resistor.

CONTROLLER AREA NETWORK (CAN)

54D-9

PRECAUTIONS ON HOW TO REPAIR THE CAN BUS LINES

EXPLANATION ABOUT THE SCAN TOOL (M.U.T.-III) CAN BUS DIAGNOSTICS

M15408300001USA0000010000

Scan tool MB991958 CAN bus diagnostics carries out
the two checks below automatically, and then displays

current condition of the CAN bus lines according to
the check results.

CAN BUS LINE DIAGNOSTIC FLOW

ZC5017880000

(1) Che ck that the E TACS-ECU sets a diagnostic trou ble cod e.

No

NG

Yes

From other diagnosis

1. Scan tool MB991958
(M.U.T.-III) CAN bus
diagnostics

Go to ordinary diagnosis

OK for (2)
P code, B code,
C code or
U code (current trouble)

OK for (2)
U code (past trouble)

2. Pinpoint possible trouble
spot according to
diagnostic trouble code

· Open circuit in CAN bus line
· Broken terminator resistor
· Power supply to ECU poorly
grounded

Short in CAN bus line to power supply
or ground

(2) Che cking the com munication condition of ECU s.

1.

Scan tool CAN bus diagnostics
Scan tool MB991958 diagnoses CAN bus lines in accordance with the following strategy.

NOTE:

After you determine whether the CAN-C lines are in good condition, then determine whether the

CAN-B lines are in good condition. Then confirm each judgment result on the scan tool screen.

(1)

Check that the ETACS-ECU sets a diagnostic trouble code.
You can narrow down the points to be diagnosed by confirming an ETACS-ECU diagnostic trouble code.

(2)

Checking the communication condition of ECUs
Scan tool MB991958 narrows down troubles in circuit by itself. Its strategies are as follows.

54D-10

CONTROLLER AREA NETWORK (CAN)

EXPLANATION ABOUT THE SCAN TOOL (M.U.T.-III) CAN BUS DIAGNOSTICS