A free, practical resource covering every major in-vehicle network protocol and the fundamentals of NVH — written the way we'd explain it to a new engineer joining a project, not as a spec summary.
Frame structure, arbitration and priority, bit timing and baud rates, the physical CAN High/Low pair, and standard vs. extended identifiers.
Start module →Mode 01 live data and Mode 03 DTCs, the OBD-II connector, and an introduction to UDS (ISO 14229) diagnostic sessions and ISO-TP transport.
Start module →How a DBC file maps raw CAN frames to named, scaled signals, and how to build one from a captured log.
Start module →What actually changes with CAN FD — frame format, the bit-rate switch, and why it isn't just "faster CAN".
Start module →PGNs, SPNs, and the extended-ID structure trucks, buses, and off-highway machines build their networks on.
Start module →The single-wire, master/slave network behind window switches, mirrors, and other low-cost body electronics.
Start module →The deterministic, time-triggered network behind steer-by-wire, active suspension, and other safety-critical systems.
Start module →The point-to-point signal protocol behind most modern automotive sensors — pedal position, pressure, temperature.
Start module →Why high-bandwidth ADAS and infotainment systems moved to Ethernet, and how SOME/IP fits on top of it.
Start module →Noise, vibration and harshness — what it is, where it comes from, and how it's measured and diagnosed.
Start module →ONAC Network Studio is built around exactly the network concepts covered here.