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Mitsubishi Outlander XL. Manual - part 1338
VOLTAGE VARIATION OF LIN BUS LINE
ZC5008030000
Voltage variation of
LIN bus line:
State:
Theoretical value:
Battery voltage
GND
(Ground level)
Recessive
Dominant
Recessive
0
1
When each ECU sends or receives signals, LIN bus
line voltage varies as follows:
｠
The voltage variation of LIN bus line (0 and 1
combination as a theoretical value) ranging
between battery voltage (recessive) and 0 V
(dominant) is output (transmitted) as a control
signal.
｠
When no communication is established, the LIN bus
line remains recessive (battery voltage).
MESSAGE FRAME
ZC5008040000
Message frame
Header
Response
a
b
c
d
d
e
d
a: Synchronization start region
b: Synchronization region
c: Identifier region
d: Data region
e: Checksum region
Theoretical value:
1 (Recessive)
0 (Dominant)
A message frame consists of regions that include a
synchronization start region, identifier region, data
region, and checksum region. A few bits of recessive
data is used to separate the frame from each region.
Frame
Region name
Description
Header
Synchronization
start region
A region that informs each ECU of the starting of header transmission
by sending dominant signals for a given period of time.
Synchronization
region
A region that synchronizes the transmission cycle of each ECU
connected to the LIN bus line (the slave ECU matches its communication
speed to that of the master ECU).
Identifier region
A region that stores an ID to call the slave ECU defined by the LIN
protocol. The number of bytes for the data region is also defined in this
region.
Response
Data region
A region to store the control data used by ECU that is called by the header
54C-4
LOCAL INTERCONNECT NETWORK (LIN)
SYSTEM OPERATION