Mitsubishi Grandis. Manual — part 476

54D-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-552

Diagnostic Item 22: Diagnose the lines between the
joint connectors (CAN1 and CAN2) <RH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-557

Diagnostic Item 23: Diagnose the lines from the main
bus line to the engine-ECU <M/T> or engine-A/T-ECU
<A/T>. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-562

Diagnostic Item 24: Diagnose the lines between CAN
main bus line and the ABS-ECU <Vehicles without
ASC>. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-567

Diagnostic Item 25: Diagnose the lines between CAN
main bus line and the ASC-ECU <Vehicles with ASC>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-571

Diagnostic Item 26: Diagnose the lines from the main
bus line to the combination meter <LH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-575

Diagnostic Item 27: Diagnose the lines from the main
bus line to the combination meter <RH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-578

Diagnostic Item 28: Diagnose the lines from the main
bus line to the centre display <LH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-581

Diagnostic Item 29: Diagnose the lines from the main
bus line to the centre display <RH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-586

Diagnostic Item 30: Diagnose the lines from the main
bus line to the ETACS-ECU <LH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-591

Diagnostic Item 31: Diagnose the lines from the main
bus line to the ETACS-ECU <RH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-594

Diagnostic Item 32: Diagnose the lines from the main
bus line to the A/C-ECU <LH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-597

Diagnostic Item 33: Diagnose the lines from the main
bus line to the A/C-ECU <RH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-600

Diagnostic Item 34: Diagnose the lines from the main
bus line to the SRS-ECU <LH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-603

Diagnostic Item 35: Diagnose the lines from the main
bus line to the SRS-ECU <RH drive vehicles>

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-606

Diagnostic Item 36: Diagnose the lines from the main
bus line to the steering wheel angle sensor <LH drive
vehicles> . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-609

Diagnostic Item 37: Diagnose the lines from the main
bus line to the steering wheel angle sensor <RH drive
vehicles> . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-613

ENGINE COMPARTMENT RELAY BOX
DISASSEMBLY AND REASSEMBLY

54D-616

CAN COMMUNICATION SIGNAL TABLE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54D-617

CAN COMMUNICATION-RELATED
DIAGNOSIS CODE (U CODE) TABLE

54D-619

GENERAL INFORMATION

CONTROLLER AREA NETWORK (CAN)

54D-3

GENERAL INFORMATION

M1548310000029

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

*1

. A

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

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
damaged mode, communications can be
continued in some cases.

STRUCTURE

• The CAN bus line consists of two lines, CAN_L

and CAN_H (CAN Low and CAN High,
respectively), 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 the two terminal

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

• The terminal resistors are installed in the

engine-ECU <M/T> or the engine A/T-ECU <A/T>
module and combination meter to stabilize
communication signals (The terminal resistance
is set at approximately 120

Ω).

• A maximum of eight ECUs are connected in the

GRANDIS CAN bus line as follows.

• Engine-ECU <M/T>

• Engine-A/T-ECU <A/T>

• ABS-ECU <Vehicles without ASC>

• ASC-ECU <Vehicles with ASC>

• Steering wheel sensor <Vehicles with ASC>

AC309831AB

Engine-ECU
<M/T>
or
engine-A/T-ECU
<A/T>

Steering
wheel
sensor

MUT-III

ETACS-
ECU

A/C-ECU

ABS-ECU
<without ASC>
or
ASC-ECU
<with ASC>

Multi-centre
display

SRS-ECU

CAN_H

CAN_L

Diagnosis
connector

Combination
meter

: shows sub bus line.

Terminal resistor (120

Ω)

Main bus lines

: shows main bus line.

GENERAL INFORMATION

CONTROLLER AREA NETWORK (CAN)

54D-4

• SRS-ECU

• A/C-ECU

• ETACS-ECU

• Centre display

• Combination meter

SPECIAL TOOL

CONTROLLER AREA NETWORK (CAN)

54D-5

SPECIAL TOOL

M1548304200079