Mitsubishi Outlander GS45X. Manual - part 1306

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-169

STEP 2. Check the wiring harness between joint connector 
(CAN1) C-103 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 (CAN1) C-103 and ETACS-ECU 

connector C-301, and check the wiring harness.

(2) Check the wiring harness between joint connector (CAN1) 

C-103 (terminal 6) and ETACS-ECU connector C-301 
(terminal 6)

OK: Continuity exists (2 ohms or less)

(3) Check the wiring harness between joint connector (CAN1) 

C-103 (terminal 19) and ETACS-ECU connector C-301 
(terminal 7)

OK: Continuity exists (2 ohms or less)

Q: Is the wiring harness between joint connector (CAN1) 

C-103 and ETACS-ECU connector C-301 in good 
condition?
YES : Go to Step 3.
NO :  Repair the wiring harness between joint connector 

(CAN1) C-103 and ETACS-ECU connector C-301.

AC709707 MS

Harness side: C-103

Harness side: C-301

Test 
harness

Test 
harness

AC709707 MT

Harness side: C-103

Harness side: C-301

Test 
harness

Test 
harness

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-170

STEP 3. Using scan tool MB991958, diagnose the CAN bus 
line. (trouble symptom check)

CAUTION

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

P.54C-7

.

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 

MB991958 screen is as shown in the figure.

OK: The display of the scan tool MB991958 is as 
shown in the figure.

Q: Does scan tool MB991958 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-171

DIAGNOSTIC ITEM 26: Short to power supply or ground, open circuit or line-to-line short in the 
CAN-B bus lines.

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

INTERFACE 
CIRCUIT

CAN DRIVE 
CIRCUIT

FRONT SEAT 
ASSEMBLY (LH)

OCCUPANT 
CLASSIFICATION-
ECU

SATELLITE 
RADIO 
TUNER

RADIO AND CD 
PLAYER OR CD 
CHANGER

CAN 
TRANSCEIVER 
CIRCUIT

CAN BOX UNIT

JOINT CONNECTOR 
(CAN1)

NOTE

:VEHICLES WITH RADIO AND
 CD PLAYER OR CD CHANGER
:VEHICLES WITH MMCS

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-172

CAN Communication Circuit

ETACS-ECU

INTERFACE 
CIRCUIT

CAN DRIVE 
CIRCUIT

A/C-ECU

COMBINATION METER

CPU

SRS-ECU

WCM

KOS-ECU

NOTE

VEHICLES WITH WCM
VEHICLES WITH KOS

CAN 
TRANSCEIVER 
CIRCUIT

CAN DRIVE 
CIRCUIT

CAN DRIVE 
CIRCUIT

JOINT CONNECTOR 
(CAN1)