Mitsubishi Outlander GS45X. Manual - part 1292

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-113

DIAGNOSTIC ITEM 17: Diagnose when the scan tool cannot receive the data sent by WCM  <vehicles 
without KOS>.

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-114

.

FUNCTION

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

.

TROUBLE JUDGMENT CONDITIONS

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

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector 

(CAN1), WCM connector improperly connected]

• Malfunction of the wiring harness [open circuit 

between the WCM connector and the joint con-
nector (CAN1), power supply circuit to the WCM]

• Malfunction of the WCM

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN1) C-103 and WCM 
connector C-29 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 WCM connector 

C-29 in good condition?
YES : Go to Step 2.
NO :  Repair the damaged parts.

AC901075AW

Connectors: C-29, C-103

C-29

C-103

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-115

STEP 2. Check the wiring harness between joint connector 
(CAN1) C-103 and WCM connector C-29 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 WCM 

connector C-29, and check the wiring harness.

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

C-103 (terminal No.5) and WCM connector C-29 (terminal 
No.11)

OK: Continuity exists (2 ohms or less)

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

C-103 (terminal No.16) and WCM connector C-29 (terminal 
No.2)

OK: Continuity exists (2 ohms or less)

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

C-103 and WCM connector C-29 in good condition?
YES : Check the power supply circuit of the WCM. Refer to 

GROUP 42C, WCM 

− Diagnosis 

P.42C-80

.

NO :  Repair the wiring harness between joint connector 

(CAN1) C-103 and WCM connector C-29.

AC709707

AC709707 MA

Harness side: C-103

Harness side: C-29

Test harness

Test harness

AC709707 MB

Harness side: C-103

Harness side: C-29

Test 
harness

Test 
harness

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-116

DIAGNOSTIC ITEM 18: Diagnose when the scan tool cannot receive the data sent by SRS-ECU.

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)