Mitsubishi Outlander (2013+). Manual - part 223

NOTES

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54C-1

GROUP 54C

CONTROLLER 

AREA NETWORK 

(CAN)

CONTENTS

GENERAL INFORMATION . . . . . . . .

54C-2

STRUCTURE . . . . . . . . . . . . . . . . . . .

54C-3

SYSTEM OPERATION. . . . . . . . . . . .

54C-4

SELF-DIAGNOSIS  . . . . . . . . . . . . . . .

54C-6

CAN BUS DIAGNOSTICS  . . . . . . . . .

54C-7

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GENERAL INFORMATION

CONTROLLER AREA NETWORK (CAN)

54C-2

GENERAL INFORMATION

M2542000100386

CAN, an abbreviation for Controller Area Network, is 
an ISO-certified international standard for a serial 

multiplex communication protocol

*1

. A communica-

tion circuit employing the CAN protocol connects 
each ECU, and sensor data can be shared among, 
which enables more reduction in wiring.
CAN offers the following advantages.

• Transmission rates are much faster than those in 

conventional communication (up to 1 Mbps

*2

), 

allowing much more data to be sent.

• It is exceptionally immune to noise, and the data 

obtained from each error detection device is more 
reliable.

• Each ECU connected via the CAN communicates 

independently, therefore if the ECU enters dam-
aged mode, communications can be continued in 
some cases.

NOTE: 

.

•

*1

: The regulations have been decided in detail, 

from software matters such as the necessary 
transmission rate for communication, the system, 
data format, and communication timing control 
method to hardware matters such as the harness 
type and length and the resistance values.

•

*2

: bps=bit per second

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STRUCTURE

CONTROLLER AREA NETWORK (CAN)

54C-3

STRUCTURE

M2542000201405

• A gateway function has been integrated to 

ETACS-ECU as the network central ECU (Refer 
to GROUP 54A 

− ETACS-ECU 

P.54A-53

).

• The CAN system consists of the following two 

networks: CAN-C (high-speed power train net-
work) and CAN-C-Mid (middle-speed body net-
work). Each ECU is connected to one of the 
networks depending on its functions.

• The CAN bus line consists of two lines, CAN_L 

and CAN_H (CAN Low and CAN High, respec-
tively), as well as two terminal resistors (A 
twisted-pair cable, highly resistant to noise, is 
used for the communications line).

• The CAN bus line connecting two dominant 

ECUs is the main bus line, and the CAN bus line 
connecting each ECU is the sub-bus line.

ACB05902

M.U.T.-III

Diagnosis
connector

CAN_H

CAN_L

Engine-ECU

Combination meter

ETACS-ECU

CAN-C-Mid

Terminal resistor

Terminal resistor

CAN_H

CAN_L

CAN-C

AC

: Indicates main bus line

: Indicates sub bus line

OSS-ECU

SRS-ECU

A/C-ECU

Radio and
CD player
or CAN box
unit

KOS-ECU

Steering 
wheel 
sensor

ABS-ECU
or 
ASC-ECU

CVT-ECU

EPS-ECU

4WD-ECU

Electric 
tailgate 
control unit

Main 
bus line

Terminal resistor

Terminal resistor

Corner sensor/
back sensor
-ECU

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