This part of ISO 16844 specifies diagnostic communication and services in tachograph systems used in road vehicles, for both the controller area network (CAN) and K-line communication modes. It is also applicable for programming purposes.
NOTE The diagnostic services base according to ISO 14229-1 and most services are common to the two communication modes, CAN and K-line. With CAN, however, there is no need for a service to start the communication, as the electronic control unit (ECU) always starts in the standard diagnostic session.