Mitsubishi Outlander GS45X. Manual - part 1278

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-57

STEP 9. Using scan tool MB991958, diagnose the CAN bus 
line. (checking the AWD-ECU for internal short to ground)

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 AWD-ECU connector C-128.
(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 
AWD-ECU connector C-128 and joint connector 
(CAN2) C-04.

NO :  Check AWD-ECU connector C-128, and repair if 

necessary. If the AWD-ECU connector is in good 
condition, replace the AWD-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-58

STEP 10. Using scan tool MB991958, diagnose the CAN 
bus line. (checking the AWC-ECU for internal short to 
ground)

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-59

STEP 11. Check the wiring harness between joint 
connector (CAN2) C-04 and ETACS-ECU connector C-301 
for a short to ground.

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

.

CAUTION

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

P.54C-7

.

(1) Disconnect ETACS-ECU connector and joint connector 

(CAN2), and measure at the wiring harness side.

(2) Measure the resistance between joint connector (CAN2) 

terminal 6 and body ground.

OK: 1 k

Ω or more

(3) Measure the resistance between joint connector (CAN2) 

terminal 19 and body ground.

OK: 1 k

Ω or more

Q: Do all the resistances measure 1 k

Ω or more?

YES : Check ETACS-ECU connector C-301, and repair if 

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

NO :  Repair the wiring harness between ETACS-ECU 

connector C-301 and joint connector (CAN2) C-04.

AC702818 BR

Harness side: C-04

Test harness

AC702818 BR

Harness side: C-04

Test harness

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-60

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

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