Mitsubishi Outlander GS45X. Manual - part 1294

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-121

STEP 2. Check the wiring harness between joint connector 
(CAN1) C-103 and occupant classification-ECU connector 
D-34-2 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 occupant 

classification-ECU connector D-34-2, and check the wiring 
harness.

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

C-103 (terminal No.11) and occupant classification-ECU 
connector D-34-2 (terminal No.24)

OK: Continuity exists (2 ohms or less)

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

C-103 (terminal No.24) and occupant classification-ECU 
connector D-34-2 (terminal No.25)

OK: Continuity exists (2 ohms or less)

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

C-103 and occupant classification-ECU connector 
D-34-2 in good condition?
YES : Check the power supply circuit of the occupant 

classification-ECU. Refer to GROUP 52B, SRS air 
bag Diagnosis 

P.52B-409

.

NO :  Repair the wiring harness between joint connector 

(CAN1) C-103 and occupant classification-ECU 
connector D-34-2.

AC709707

AC709707 ME

Harness side: C-103

Harness side: D-34-2

Test harness

Test harness

AC709707 MF

Harness side: C-103

Harness side: D-34-2

Test harness

Test 
harness

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-122

DIAGNOSTIC ITEM 20: Diagnose when the scan tool cannot receive the data sent by A/C-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)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-123

.

FUNCTION

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

.

TROUBLE JUDGMENT CONDITIONS

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

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector 

(CAN1), A/C-ECU connector improperly con-
nected]

• Malfunction of the wiring harness [open circuit 

between the A/C-ECU connector and the joint 
connector (CAN1), power supply circuit to the 
A/C-ECU]

• Malfunction of the A/C-ECU

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN1) C-103 and A/C-ECU 
connector C-109 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 A/C-ECU 

connector C-109 in good condition?
YES : Go to Step 2.
NO :  Repair the damaged parts.

AC901075AX

Connector: C-103

AC901076AL

Connector: C-109

C-109 (B)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-124

STEP 2. Check the wiring harness between joint connector 
(CAN1) C-103 and A/C-ECU connector C-109 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 A/C-ECU 

connector C-109, and check the wiring harness.

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

C-103 (terminal No.9) and A/C-ECU connector C-109 
(terminal No.11)

OK: Continuity exists (2 ohms or less)

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

C-103 (terminal No.22) and A/C-ECU connector C-109 
(terminal No.12)

OK: Continuity exists (2 ohms or less)

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

C-103 and A/C-ECU connector C-109 in good condition?
YES : Check the power supply circuit of the A/C-ECU. Refer 

to GROUP 55A, Diagnosis 

P.55A-63

.

NO :  Repair the wiring harness between joint connector 

(CAN1) C-103 and A/C-ECU connector C-109.

AC709707

AC709707 MI

Harness side: C-103

Harness side: C-109

Test 
harness

Test 
harness

AC709707 MJ

Harness side: 
C-103

Harness side: C-109

Test 
harness

Test 
harness