Mitsubishi Outlander GS45X. Manual — part 1264
54C-1
GROUP 54C
CONTROLLER
AREA NETWORK
(CAN)
CONTENTS
GENERAL INFORMATION . . . . . . . .
SPECIAL TOOLS. . . . . . . . . . . . . . . .
TEST EQUIPMENT . . . . . . . . . . . . . .
SERVICE PRECAUTIONS. . . . . . . . .
PRECAUTIONS ON HOW TO REPAIR
THE CAN BUS LINES . . . . . . . . . . . .
EXPLANATION ABOUT
THE SCAN TOOL (M.U.T.-III)
CAN BUS DIAGNOSTICS . . . . . . . . .
DIAGNOSTIC TROUBLE CODE
DIAGNOSIS . . . . . . . . . . . . . . . . . . . .
DIAGNOSIS . . . . . . . . . . . . . . . . . . . .
CAN BUS DIAGNOSTICS TABLE . . . . . . .
CAN-RELATED CONNECTOR POSITION .
CAN BUS DIAGNOSTICS. . . . . . . . . . . . . .
CAN COMMUNICATION-RELATED
DTC (U-CODE) TABLE. . . . . . . . . . . .
GENERAL INFORMATION
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-2
GENERAL INFORMATION
M1548310001709
CAN, an abbreviation for Controller Area Network, is
an ISO-certified international standard for a serial
multiplex communication protocol
*
. A communication
circuit employing the CAN protocol connects each
electric control module (ECU), and sensor data can
be shared among, which enables more reduction in
wiring.
NOTE:
*
: 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.
CAN offers the following advantages.
• Transmission rates are much faster than those in
conventional communication (up to 1 Mbps),
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.
GENERAL INFORMATION
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-3
STRUCTURE
• With OUTLANDER, for the first time with MMC, a
gateway function has been integrated to
ETACS-ECU as the network central ECU.
• The CAN system consists of the following three
networks: CAN-B (middle-speed body network),
CAN-C (high-speed power train network), and the
diagnosis CAN-C (diagnosis exclusive network).
Each ECU is connected to one of the networks
depending on its functions.
ACA02827 AB
Engine control
module (ECM)
AWD-ECU
SRS-ECU
A/C-ECU
Satellite
radio tuner
Combination
meter
Radio and
CD player*
or
Radio and
CD changer*
or
CAN box unit*
WCM*
or
KOS-ECU*
Scan tool
Data link
connector
ETACS-ECU
Steering
wheel
sensor
ABS-ECU*
or
ASC-ECU*
Transaxle
control
module
(TCM)
CAN_H
CAN_L
Main bus line
CAN_H
CAN_L
CAN_H
CAN_L
CAN-C
CAN-B
Diagnosis CAN-C
Terminal resistor
Terminal
resistor
: indicates main bus line
: indicates sub bus line
Occupant
classification-
ECU
Main bus line
NOTE:
*: ABS-ECU <Vehicles without ASC>
ASC-ECU <Vehicles with ASC>
AWC-ECU <Vehicles with S-AWC>
WCM <Vehicles without KOS>
KOS-ECU <Vehicles with KOS>
Radio and CD Player
<Vehicles with radio and CD player>
Radio and CD changer
<Vehicles with radio and CD changer>
CAN box unit <Vehicles with MMCS>
<Vehicles with ASC>
<Vehicles with
satellite radio tuner>
<CVT, A/T>
<4WD>
AWC-ECU*
GENERAL INFORMATION
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-4
• 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.
• With CAN-C, the terminal resistors are incorpo-
rated in ECU. Resistors with approximately 120
ohms is used for the dominant ECU, and that with
3.0 k
Ω is used for the non-dominant ECU.
NOTE:
.
•
Dominant ECU: ETACS-ECU and engine con-
trol module
•
Non-dominant ECU: ECU and sensor on
CAN-C network, excluding ETACS-ECU and
engine control module
• To the CAN bus line, ECU, sensor, and data link
connector are connected as follows for each net-
work.
CAN-B
• A/C-ECU
• SRS-ECU
• Occupant classification-ECU
• Radio and CD player <vehicles with radio and
CD player>
• Radio and CD changer <vehicles with radio
and CD changer>
• CAN box unit <vehicles with MMCS>
• Satellite radio tuner <vehicles with satellite
radio>
• WCM <vehicles without KOS>
• KOS-ECU <vehicles with KOS>
• Combination meter
CAN-C
• AWD-ECU <Electric controlled AWD>
• AWC-ECU <S-AWC>
• Steering wheel sensor <vehicles with ASC>
• ABS-ECU <vehicles without ASC>
• ASC-ECU <vehicles with ASC>
• Transaxle control module (TCM) <CVT, A/T>
• Engine control module (ECM)
DIAGNOSIS CAN-C
• Data link connector
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