Chapter 3 Automotive Test
65
3.5.2
LIN Bus
The LIN protocol is short for Local Interconnect Network.
The Lin bus communication is very common in automobiles, it is low speed, there are multiple control devices
mounted on a network. It can contril non-safety-critical and low-speed devices on vehicles, such as wipers, windows,
mirrors, air conditioners, electronic seats, etc. LIN is single-wired, has high level and low level when transmitting
data, the high level is 12V, and the low level is 0V. The LIN bus generally has a sync header followed by data. If
there is only a signal from the sync header, it means that the device has not responded.
Use the ATO oscilloscope to test the LIN bus, the specific operation is shown in Figure 3-46:
Figure 3-46 Lin bus test
The following picture is the actual measurement of Audi A6 LIN bus in a certain year:
Summary of Contents for ATO1000 Series
Page 1: ......
Page 2: ...Version Info Version Date Remarks V1 0 2020 06 ...
Page 52: ...Chapter 3 Automotive Test 49 Figure 3 30 Electronic fuel pump test ...
Page 71: ...68 Figure 3 49 K line test ...
Page 79: ...76 Figure 3 57 Mazda 6 Cylinder internal pressure measurement ...
