Mitsubishi Outlander GS45X. Manual — part 1271

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-29

STEP 3. Check the wiring harness between data link
connector C-125 and ETACS-ECU connector C-301 for a
short to ground. Measure the resistance at data link
connector C-125.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-7

.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-7

.

CAUTION

The test wiring harness should be used. For details refer to

P.54C-7

.

(1) Disconnect the scan tool and ETACS-ECU connector

C-301, and measure the resistance at the wiring harness
side of data link connector C-125.

(2) Measure the resistance between data link connector

terminal 6 and body ground. <CAN_H>

OK: 1 k

Ω or more

(3) Measure the resistance between data link connector

terminal 14 and body ground. <CAN_L>

OK: 1 k

Ω or more

Q: Do all the resistances measure 1 k

Ω or more?

YES : Go to Step 4.
NO : Repair the wiring harness between data link

connector C-125 and ETACS-ECU connector C-301.

AC702818BK

Harness side: C-125

Test harness

AC702818 BL

Harness side: C-125

Test harness

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-30

STEP 4. Check the wiring harness between data link
connector C-125 and ETACS-ECU connector C-301 for a
short to the power supply. Measure the voltage at data link
connector C-125.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-7

.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-7

.

CAUTION

The test wiring harness should be used. For details refer to

P.54C-7

.

(1) Disconnect the scan tool and ETACS-ECU connector

C-301, and measure the resistance at the wiring harness
side of data link connector C-125.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between data link connector terminal 6

and body ground. <CAN_H>

OK: 1 volts or less

(4) Measure the voltage between data link connector terminal

14 and body ground. <CAN_L>

OK: 1 volts or less

Q: Do all the voltage measure 5 volts or less?

YES : Go to Step 5.
NO : Repair the wiring harness between data link

connector C-125 and ETACS-ECU connector C-301.

AC702831BA

Harness side: C-125

Test harness

AC702831 BB

Harness side: C-125

Test harness

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-31

STEP 5. Check the wiring harness between data link
connector C-125 and ETACS-ECU connector C-301 for
line-to-line short. Measure the resistance at data link
connector C-125.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-7

.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-7

.

CAUTION

The test wiring harness should be used. For details refer to

P.54C-7

.

(1) Disconnect the scan tool and ETACS-ECU connector

C-301, and measure the resistance at the wiring harness
side of data link connector C-125.

(2) Measure the resistance between data link connector

terminal 6 and 14.

OK: No continuity

Q: Is the check result normal?

YES : Go to Step 6.
NO : Repair the wiring harness between data link

connector C-125 and ETACS-ECU connector C-301.

AC702818 BM

Test
harness

Test
harness

Harness side: C-125

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-32

STEP 6. Using scan tool MB991958, diagnose the CAN bus
line.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.

(3) Diagnose CAN bus lines, and check if the scan tool screen

is as shown in the illustration.

Q: Does the scan tool screen correspond to the

illustration?
YES : The trouble can be an intermittent malfunction (Refer

to GROUP 00, How to use
Troubleshooting/inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-15

).

NO : Replace the ETACS-ECU.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

ACA02847AB

: Red section on screen

M.U.T.

JC

JC

SAS

AWC

F.A.S.T.
/WCM

SRS

OCM

A/C

AUDIO

MMCS

Sat Radio

METER

ABS/ASC

AT/CVT

ENGINE

ETACS

JC