Mitsubishi Outlander GS45X. Manual - part 1284

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-81

STEP 2. Check the wiring harness between joint connector 
(CAN2) C-04 and AWD-ECU connector C-128 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 AWD-ECU 

connector C-301, and check the wiring harness.

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

C-04 (terminal No.5) and AWD-ECU connector C-128 
(terminal No.5)

OK: Continuity exists (2 ohms or less)

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

C-04 (terminal No.16) and AWD-ECU connector C-128 
(terminal No.13)

OK: Continuity exists (2 ohms or less)

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

C-04 and AWD-ECU connector C-128 in good condition?
YES : Check the power supply circuit of the AWD-ECU. 

Refer to GROUP 27C, Multiselect AWD Diagnosis 

P.27C-11

.

NO :  Repair the wiring harness between joint connector 

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

AC709707

AC709707

Harness side: C-04

MV

TEST HARNESS

Harness side: C-128

TEST HARNESS

AC709707

Harness side: C-04

MW

Harness side: C-128

TEST HARNESS

TEST HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-82

DIAGNOSTIC ITEM 7: Diagnose when the scan tool cannot receive the data sent by AWC-ECU 
<S-AWC>.

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

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-83

.

FUNCTION

If the scan tool MB991958 cannot communicate with 
the AWC-ECU, this diagnosis result will be set.

.

TROUBLE JUDGMENT CONDITIONS

If a communication flag is not set for the AWC-ECU, 
the ETACS-ECU determines that there is a failure.

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector 

(CAN2) or AWC-ECU connector improperly con-
nected]

• Malfunction of the wiring harness [open circuit 

between the AWC-ECU and the joint connector 
(CAN2), power supply circuit to the AWC-ECU]

• Malfunction of the AWC-ECU

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN2) C-04, AWC-ECU 
connector C-139, intermediate connector C-138 and 
intermediate connector C-31 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, AWC-ECU connector 

C-139, intermediate connector C-138 and intermediate 
connector C-31 in good condition?
YES : Go to Step 2.
NO :  Repair the damaged parts.

AC901075 AO

C-04

C-31

Connectors: C-04, C-31, C-138, C-139

C-139

C-138 (BR)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-84

STEP 2. Check the wiring harness between joint connector 
(CAN2) C-04 and AWC-ECU connector C-139 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 AWC-ECU 

connector C-301, and check the wiring harness.

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

C-04 (terminal No.5) and AWC-ECU connector C-139 
(terminal No.5)

OK: Continuity exists (2 ohms or less)

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

C-04 (terminal No.16) and AWC-ECU connector C-139 
(terminal No.13)

OK: Continuity exists (2 ohms or less)

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

C-04 and AWC-ECU connector C-139 in good condition?
YES : Check the power supply circuit of the AWC-ECU. 

Refer to GROUP 23C, S-AWC Diagnosis 

P.23C-241

.

NO :  Repair the wiring harness between joint connector 

(CAN2) C-04 and AWC-ECU connector C-139.

AC709707

AC709707

Harness side: C-04

NZ

TEST HARNESS

Harness side: C-139

TEST HARNESS

AC709707

Harness side: C-04

OA

Harness side: C-139

TEST HARNESS

TEST HARNESS