Mitsubishi Outlander GS45X. Manual - part 1289

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-101

.

FUNCTION

If a failure is present in the wiring harness between 
the ETACS-ECU connector and the joint connector 
(CAN2), this diagnosis result will be set.

.

TROUBLE JUDGMENT CONDITIONS

If a communication flag is not set for some of the 
ECUs on the CAN-C line, the ETACS-ECU deter-
mines that there is a failure.

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector 

(CAN2) or ETACS-ECU connector improperly 
connected]

• Malfunction of the wiring harness [open circuit 

between the ETACS-ECU connector and the joint 
connector (CAN2), power supply circuit to the 
engine control module]

• Malfunction of the ETACS-ECU

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN2) C-04 and 
ETACS-ECU connector C-301 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

CAUTION

The strand end of the twisted wire should be within 10 cm 
(4 inches) from the connector. For details refer to 

P.54C-7

.

Q: Are joint connector (CAN2) C-04 and ETACS-ECU 

connector C-301 in good condition?
YES : Go to Step 2.
NO :  Repair the damaged parts.

AC901075 AP

Connector: C-04

ACA02655BB

Connector: C-301

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-102

STEP 2. Check the wiring harness between joint connector 
(CAN2) C-04 and ETACS-ECU connector C-301 for open 
circuit.

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to 

P.54C-7

.

(1) Disconnect joint connector (CAN2) C-04 and ETACS-ECU 

connector C-301, and check the wiring harness.

(2) Check the wiring harness between joint connector (CAN2) 

C-04 (terminal No.6) and ETACS-ECU connector C-301 
(terminal No.9)

OK: Continuity exists (2 ohms or less)

(3) Check the wiring harness between joint connector (CAN2) 

C-04 (terminal No.19) and ETACS-ECU connector C-301 
(terminal No.8)

OK: Continuity exists (2 ohms or less)

Q: Is the wiring harness between joint connector (CAN2) 

C-04 and ETACS-ECU connector C-301 in good 
condition?
YES : Go to Step 3.
NO :  Repair the wiring harness between joint connector 

(CAN2) C-04 and ETACS-ECU connector C-301.

AC709707NH

Harness side: C-04

Test 
harness

Harness side: C-301

Test 
harness

AC709707NI

Harness side: C-04

Test 
harness

Harness side: C-301

Test 
harness

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-103

STEP 3. 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

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-104

DIAGNOSTIC ITEM 14: Diagnose the lines between joint connector (CAN2) and joint connector 
(CAN3).

CAUTION

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

CAN Communication Circuit

ETACS-ECU

INTERFACE 
CIRCUIT

CAN DRIVE 
CIRCUIT

STEERING WHEEL 
SENSOR

AWD-ECU

AWC-ECU

JOINT CONNECTOR 
(CAN2)

JOINT CONNECTOR 
(CAN3)

TRANSAXLE 
CONTROL MODULE

ASC-ECU

ABS-ECU

ENGINE CONTROL 
MODULE

:VEHICLES WITHOUT ASC

NOTE

:VEHICLES WITH ASC

:6A/T

:CVT

:ELECTRONIC CONTROLLED AWD
:S-AWC