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Driven by the increasing complexity of vehicle electronic systems and the continuously increasing software volume needing to be flash programmed into Electronic Control Units in case of updates, the bandwidth requirements for accessing the vehicle electronics via the OBD plug are also on the rise. Today's CAN-Bus solutions permit a data bandwidth of up to 500 Kbit/s, which is insufficient by now.

To fulfill the new requirements, Internet technology enters the vehicle electronics. Four pins of the OBD plug are going to implement an ethernet bus, allowing communication with up to 100 Mbit/s. On a protocol layer the communication with the internal Electronic Control Unit will be performed via a TCP/IP or a UDP/IP protocol stack, depending on the type of application.

Within the ISO, this new transport protocol, which on an application layer will be extended with UDS Services (cf. ISO 14229-1), is standardized as Standard 13400, DoIP (Diagnostics over Internet Protocol).

Since international legislation regulates this access to the vehicle, a quick propagation of this standard can be foreseen.

The DoIP protocol has an impact on the existing standardized diagnostic interfaces D-PDU API (ISO 22900-2) and MCD-3D API (ISO 22900-3). To ensure a coherent and consensus solution for all affected standards, DSA has initiated a joint meeting with all experts, which will take place in May 2010.