Mitsubishi Lancer Evolution X. Manual - part 34

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-161

STEP 2. Check the wiring harness between joint connector 
(CAN1) C-105 and combination meter connector C-04.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN1) C-105 and combination 

meter connector C-04, and check the wiring harness.

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

C-105 (terminal 3) and combination meter connector C-04 
(terminal 14)

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

C-105 (terminal 14) and combination meter connector C-04 
(terminal 15)

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

C-105 and combination meter connector C-04 in good 
condition?
YES : Check the power supply circuit of the combination 

meter. Refer to GROUP 54A, combination meter − 

Diagnosis 

P.54A-67

.

NO :  Repair the wiring harness between joint connector 

(CAN1) C-105 and combination meter connector 
C-04.

AC709707

AC709707 CN

Harness side: C-105

Harness side: C-04

TEST HARNESS

TEST HARNESS

AC709707 CO

Harness side: C-105

Harness side: C-04

TEST HARNESS

TEST 
HARNESS

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-162

DIAGNOSTIC ITEM 25: Short to power supply or ground in both CAN_H and CAN_L lines of the 
CAN-B bus lines.

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-B Communication Circuit

ETACS-ECU

INTERFACE 
CIRCUIT

CAN DRIVE 
CIRCUIT

A/C-ECU

COMBINATION 
METER

SRS-ECU

WIRELESS 
CONTROL 
MODULE

KOS-ECU

NOTE

VEHICLES WITH WCM
VEHICLES WITH KOS

CAN DRIVE 
CIRCUIT

CAN DRIVE 
CIRCUIT

CAN DRIVE 
CIRCUIT

JOINT CONNECTOR 
(CAN1)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-163

CAN-B Communication Circuit

ETACS-ECU

INTERFACE 
CIRCUIT

INTERFACE 
CIRCUIT

CAN DRIVE 
CIRCUIT

HANDS FREE 
MODULE

OCCUPANT 
CLASSIFICATION-
ECU

SATELLITE 
RADIO TUNER

RADIO AND CD
PLAYER

NOTE

VEHICLES WITHOUT MITSUBISHI MULTI-COMMUNICATION SYSTEM (MMCS)
VEHICLES WITH MITSUBISHI MULTI-COMMUNICATION SYSTEM (MMCS)

CAN 
TRANSCEIVER 
CIRCUIT

CAN BOX UNIT

JOINT CONNECTOR 
(CAN1)

FRONT SEAT 
ASSEMBLY (LH)

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-164

.

FUNCTION

If a short to power supply or ground is present in both 
CAN_H and CAN_L lines, this diagnosis result will be 
set.

.

TROUBLE JUDGMENT CONDITIONS

If a communication flag is set for the ETACS-ECU, 
no communication is present through the CAN-B 
line, and diagnostic trouble code U0019 is set, the 
ETACS-ECU determines that there is a failure.

.

TROUBLESHOOTING HINTS

• Malfunction of the connector (ETACS-ECU con-

nector improperly connected)

• Malfunction of the wiring harness (CAN_H and 

CAN_L lines are short to power supply or ground 
on the CAN-B line.)

• Malfunction of ECUs

AC708950CC

C-04

C-05

C-105

Connectors: C-04, C-05, C-105

AC708951CF

Connectors: C-07, C-11, C-15, C-18, C-22, 
C-37, C-107

C-07

C-15

C-18

C-22 (B)

C-11

C-37 (Y)

C-107

AC708972AY

Connector: C-301

ETACS-ECU

AC708954AW

Connector: D-39-2