Mitsubishi Outlander GS45X. Manual - part 1274

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-41

STEP 11. Using scan tool MB991958, diagnose the CAN 
bus line. (checking the AWC-ECU for internal short)

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 AWC-ECU connector C-139.
(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 : Check intermediate connector C-31 and C-138, and 

repair if necessary. If the intermediate connector is in 
good condition, repair the wiring harness between 
AWC-ECU connector C-139 and joint connector 
(CAN2) C-04.

NO :  Check AWC-ECU connector C-139, and repair if 

necessary. If the AWC-ECU connector is in good 
condition, replace the AWC-ECU.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

ACA02847AC

: Red section on screen

M.U.T.

F.A.S.T.
/WCM

SRS

OCM

A/C

AUDIO

MMCS

Sat Radio

METER

JC

ETACS

JC

JC

SAS

AWC

ABS/ASC

AT/CVT

ENGINE

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-42

STEP 12. Using scan tool MB991958, diagnose the CAN 
bus line. (checking the ECM for internal short)

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 ECM connector B-11.
(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 ECM connector 

B-11 and joint connector (CAN3) C-01.

NO :  Check ECM connector B-11, and repair if necessary. 

If the ECM connector is in good condition, replace the 
ECM.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

ACA02847AC

: Red section on screen

M.U.T.

F.A.S.T.
/WCM

SRS

OCM

A/C

AUDIO

MMCS

Sat Radio

METER

JC

ETACS

JC

JC

SAS

AWC

ABS/ASC

AT/CVT

ENGINE

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-43

STEP 13. Using scan tool MB991958, diagnose the CAN 
bus line. (checking the ABS-ECU <vehicles without ASC> 
or ASC-ECU <vehicles with ASC> for internal short)

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 ABS-ECU connector A-01 <vehicles without 

ASC> or ASC-ECU connector A-02 <vehicles with ASC>.

(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 ABS-ECU 

connector A-01 <vehicles without ASC> or ASC-ECU 
connector A-02 <vehicles with ASC> and joint 
connector (CAN3) C-01.

NO :  Check ABS-ECU connector A-01 <vehicles without 

ASC> or ASC-ECU connector A-02 <vehicles with 
ASC>, and repair if necessary. If the ABS-ECU 
<vehicles without ASC> or ASC-ECU <vehicles with 
ASC> connector is in good condition, replace the 
ABS-ECU <vehicles without ASC> or ASC-ECU 
<vehicles with ASC>.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

ACA02847AC

: Red section on screen

M.U.T.

F.A.S.T.
/WCM

SRS

OCM

A/C

AUDIO

MMCS

Sat Radio

METER

JC

ETACS

JC

JC

SAS

AWC

ABS/ASC

AT/CVT

ENGINE

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-44

STEP 14. Using scan tool MB991958, diagnose the CAN 
bus line. (checking the TCM for internal short)

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 TCM connector C-38.
(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 TCM connector 

C-38 and joint connector (CAN3) C-01.

NO :  Check TCM connector C-38, and repair if necessary. 

If the TCM connector is in good condition, replace the 
TCM.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

ACA02847AC

: Red section on screen

M.U.T.

F.A.S.T.
/WCM

SRS

OCM

A/C

AUDIO

MMCS

Sat Radio

METER

JC

ETACS

JC

JC

SAS

AWC

ABS/ASC

AT/CVT

ENGINE