What is DoIP and do I need a special device for it?
Short answer: DoIP is Diagnostics over Internet Protocol, which uses an Ethernet connection through the diagnostic port for faster communication, and vehicles that use it need a device and cable that support it.
Larger software files and more modules have pushed some vehicle makers to Ethernet communication. DoIP uses specific pins in the diagnostic connector to provide a network connection to the vehicle's gateway, which allows faster data transfer for diagnostics and programming than traditional CAN.
Not every J2534 device or scan tool supports DoIP. Check the device's specifications and the vehicle maker's requirements. Some vehicles use DoIP for programming but still support CAN for basic diagnostics, so a scan tool may read codes while still being unable to program.
If you work on vehicles that use DoIP, confirm your device, cable and software support it before starting a programming job. Keep the device's firmware current, since DoIP support is often added through updates. Follow the maker's power supply requirements, as Ethernet programming sessions still need stable voltage.
Tools used for this job
General guidance only. Follow the vehicle and tool manufacturer's procedures, and confirm vehicle coverage on the tool maker's list before buying.