![]() Here is a summary of CAN history taken from the article History of CAN technology: CAN was designed in the 1980s because of the limitations of existing serial data buses for use in cars. What is CAN? CAN stands for Controller Area Network. Otherwise, read the CAN bus background information coming next. To jump straight to the wiring section then scroll down. Therefore, OBD CAN bus wiring is covered. ![]() In a car, a CAN bus it is usually available via the On-Board Diagnostics (OBD) port. The CAN bus is used in nearly every form of motorized road transport (even some motorcycles and scooters). The DB9 is also known as 9-pin D-sub, DE-9 (its correct name), DB-9, serial connector, RS232 connector or null modem connector. It covers wiring for the common DB9 plug and socket often used with CAN bus test equipment. This article covers the basics of CAN bus wiring, showing a simple CAN bus wiring diagram and how to wire up a CAN bus cable. The disadvantages are that the data packet lengths are small, transmission rates are low and the message transmission cycle time can vary. The main advantages are high resilience to noise, reliability, low cost, simple wiring and ease of use. The CAN bus is used for routing sensor data between pieces of equipment. The CAN bus is a common digital data network used in automotive, industrial, medical and scientific systems. ![]() CAN Bus Wiring Diagram, a Basics Tutorial
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