What do CAN_L and CAN_H represent in a car?

[MacBrantley]

In the electronic fuel injection circuit, CAN-L and CAN-H are part of the vehicle's network transmission method. CAN-H refers to the high voltage in the dominant state of the network line, while CAN-L refers to the low voltage in the dominant state. The following are the differences between CAN-L and CAN-H: 1. The colors of the two wires are different. CAN-H has primary and secondary colors, while CAN-L has only one color. 2. The voltage signals are different. If both are 2.5V, it is considered as 1, called the dominant state; if the high voltage is 3.5V and the low voltage is 1.5V, it is called the recessive state. 3. In the vehicle's network transmission method, CAN-H is the high-level data line, and CAN-L is the low-level data line. The two are twisted together, which makes the CAN bus less sensitive to electromagnetic interference.