Mitsubishi Outlander GS45X. Manual - part 1305

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-165

STEP 30. Using scan tool MB991958, diagnose the CAN 
bus line. (checking the satellite radio tuner for internal 
failure)

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) Disconnect satellite radio tuner connector C-111.
(2) Connect scan tool MB991958 to the data link connector.
(3) Turn the ignition switch to the "ON" position.

(4) 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 : Repair the wiring harness between joint connector 

(CAN1) C-103 and satellite radio tuner connector 
C-111.

NO :  Check satellite radio tuner connector C-111, and 

repair if necessary. If the satellite radio tuner 
connector is in good condition, replace the satellite 
radio tuner.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

ACA02847AD

: Red section on screen

M.U.T.

JC

JC

SAS

AWC

ABS/ASC

AT/CVT

ENGINE

ETACS

JC

F.A.S.T.
/WCM

SRS

OCM

A/C

AUDIO

MMCS

Sat Radio

METER

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-166

STEP 31. 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 :  Check the ETACS-ECU connector C-301, and repair 

if necessary. If the ETACS-ECU connector is in good 
condition, 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

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-167

DIAGNOSTIC ITEM 25: Diagnose the ETACS-ECU, joint connector (CAN1) or lines between 
ETACS-ECU and joint connector (CAN1).

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

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)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-168

.

FUNCTION

If a failure is present in the wiring harness wires 
between the ETACS-ECU connector, the joint con-
nector (CAN1), the ETACS-ECU connector and the 
joint connector (CAN1), this diagnosis result will be 
set.

.

TROUBLE JUDGMENT CONDITIONS

If a communication flag is set for none of the ECUs 
on the CAN-B line, the ETACS-ECU determines that 
there is a failure.

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector 

(CAN1) or ETACS-ECU connector improperly 
connected]

• Malfunction of the wiring harness [open circuit 

between the ETACS-ECU connector and the joint 
connector (CAN1)]

• Malfunction of the ETACS-ECU

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN1) C-103 and 
EATCS-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 (CAN1) C-103 and ETACS-ECU 

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

AC901075AX

Connector: C-103

ACA02655BB

Connector: C-301