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Chapter 3 Automotive Test
125
3.5.3 FlexRay Bus
With the increase of car transmission content, the Flexray bus with faster transmission speed has been developed,
and the transmission rate can reach 10Mbps. It has the advantages of high speed, determinability, and fault
tolerance. It can work with CAN, LIN and other buses.
The Flexray bus still has 2 lines and the waveform is in a differential pattern. When idle, the voltage of the two
wires is 2.5V; when transmitting data, both wires will have a voltage of 1V up and down, and the voltages on the
two wires are opposite.
Use the P130A probe, one end is connected to channel 1 of the oscilloscope, and the other end is grounded with the
black clip. Use a piercing needle to pierce the easy-to-test Flexray bus positive plug, and hook the probe to the
metal needle of the puncture needle. Use the P130A probe, connect one end to channel 2 of the oscilloscope, and
the black clip on the other end to ground. Use a needle to pierce the easy-to-test Flexray bus negative plug, and
hook the probe to the metal needle of the needle.
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