Mitsubishi Evolution X. Manual — part 1152
54B-1
GROUP 54B
LOCAL
INTERCONNECT
NETWORK (LIN)
CONTENTS
GENERAL INFORMATION . . . . . . . .
SPECIAL TOOLS. . . . . . . . . . . . . . . .
TROUBLESHOOTING . . . . . . . . . . . .
DIAGNOSIS FUNCTION . . . . . . . . . . . . . . .
DIAGNOSTIC TROUBLE CODE CHART . .
DIAGNOSTIC TROUBLE CODE
PROCEDURES . . . . . . . . . . . . . . . . . . . . . .
GENERAL INFORMATION
TSB Revision
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
TSB Revision
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
TSB Revision
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.
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