Mitsubishi Evolution X. Manual - part 1152

54B-1

GROUP 54B

LOCAL 

INTERCONNECT 

NETWORK (LIN)

CONTENTS

GENERAL INFORMATION . . . . . . . .

54B-2

SPECIAL TOOLS. . . . . . . . . . . . . . . .

54B-3

TROUBLESHOOTING  . . . . . . . . . . . .

54B-4

DIAGNOSIS FUNCTION . . . . . . . . . . . . . . . 

54B-4

DIAGNOSTIC TROUBLE CODE CHART . . 

54B-5

DIAGNOSTIC TROUBLE CODE 

 

PROCEDURES . . . . . . . . . . . . . . . . . . . . . . 

54B-6

GENERAL INFORMATION

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LOCAL INTERCONNECT NETWORK (LIN)

54B-2

GENERAL INFORMATION

M1545110000189

LIN refers to "Local Interconnect Network," which is a 
serial multiplex communication protocol

*

 adminis-

trated by LIN consortium. A communication circuit 
employing the LIN protocol connects each ECU, and 
switch and sensor data can be shared among ECUs, 
which enables more reduction in wiring.

NOTE: 

*

: The regulations that 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.

STRUCTURE

AC708922 AB

ETACS-ECU

Master ECU

Column switch
(column-ECU)

Sunroof motor 
assembly
(Sunroof-ECU)*

1

Note:
*

1

: Vehicles with sunroof

*

2

: Vehicles with auto light function

Lighting control 
sensor*

2

Slave ECU

Slave ECU

Slave ECU

Slave ECU

LIN bus line

Power window 
main switch

Master and slave ECUs are connected to the LIN 
bus lines. The master ECU is the ETACS

*1

-ECU, 

and the slave ECUs are the column switch (col-
umn-ECU), the power window main switch, the sun-
roof-ECU

*2

 and the lighting control sensor

*3

. The 

master ECU requests these slave ECUs to commu-
nicate each other via communication lines.

NOTE: 

.

•

*1

: ETACS (Electronic Time and Alarm Control 

System)

•

*2

: Vehicles with sunroof

•

*3

: Vehicles with auto light function

SPECIAL TOOLS

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LOCAL INTERCONNECT NETWORK (LIN)

54B-3

SPECIAL TOOLS

M1545100100129

Tool

Number

Name

Use

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

a

b

c

d

e

f

DO NOT USE

MB991955

a. MB991824
b. MB991827
c. MB991910
d. MB991911
e. MB991825
f. MB991826

M.U.T.-III 
sub-assembly

a. Vehicle 

Communication 
Interface (V.C.I.)

b. M.U.T.-III USB 

cable

c. M.U.T.-III main 

harness A 
(Vehicles with CAN 
communication 
system)

d. M.U.T.-III main 

harness B 
(Vehicles without 
CAN 
communication 
system)

e. M.U.T.-III measure 

adapter

f. M.U.T.-III trigger 

harness

For vehicles with CAN 
communication, use M.U.T.-III 
main harness A to send 
simulated vehicle speed. If you 
connect M.U.T.-III main harness 
B instead, the CAN 
communication does not 
function correctly.
LIN communication line check 
(service data and diagnosis 
codes)

CAUTION

TROUBLESHOOTING

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LOCAL INTERCONNECT NETWORK (LIN)

54B-4

TROUBLESHOOTING

DIAGNOSIS FUNCTION

M1545104200043

HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

.

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with CAN 

communication system)

.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Ensure that the ignition switch is at the "LOCK" (OFF) 

position.

2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 

and the personal computer.

4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON" 

position.
NOTE: When special tool MB991824 is energized, special 
tool MB991824 indicator light will be illuminated in a green 
color.

7. Start the M.U.T.-III system on the personal computer.
NOTE: Disconnecting scan tool MB991958 is the reverse of the 
connecting sequence, making sure that the ignition switch is at 
the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC 
TROUBLE CODES

.

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with CAN 

communication system)

.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
NOTE: If the battery voltage is low, diagnostic trouble codes will 
not be set. Check the battery if scan tool MB991958 does not 
display.
1. Connect scan tool MB991958 to the data link connector.