Engine Automotive Wiring Harness Communication Standards
Engine Automotive Wiring Harness communication standards mainly include two protocols: CAN (Controller Area Network) and LIN (Local Interconnect Network).
Performance | LIN | CAN |
Medium Access Control | Single Master | Multiple Master |
Typical Bus Speed | 2.4 to 19.6 kbd | 62.5 to 500 kbd |
Multicast Message Routing | 6-bit ldentifier | 11/29-bit ldentifier |
Typical Number of Nodes | 2 to 10 Nodes | 4 to 20 Nodes |
Encoding | NRZ 8N1 (USART) | NRZ with Bit Stuffing |
Data Byte per Frame | 2,4,8 Byte | 0 to 8 Byte |
Transmission Time for
4 Data Bytes |
3.5 ms at 20 kbd | 0.8 ms at 125 kbd |
Error Detection | 8-bit Checksum | 15-bit CRC |
Physical Layer | Single Wire, Vbat | Twisted Pair, 5V |
Clock Generation | Master:Crystal,Slaves:RC/Resonator | Crystal |
Relative Cost per Node | 0.5 | 1 |
CAN and LIN are suitable for different scenarios in engine compartment wiring harness communication. CAN is used for high-speed, high-reliability key engine control systems, while LIN is used for auxiliary systems of modules with low real-time requirements, such as body control (such as windows and wipers).
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