BS ISO 11992-1:2019 Road vehicles. Interchange of digital information on electrical connections between towing and towed vehicles Physical and data-link layers

Electrical equipment
Error detection
Electronic equipment and components
Data transfer
Digital signals
Communication networks
Motor vehicles
Diagnostic programs
Towed road vehicles
Information exchange
Road vehicles
Data transmission

Link: BS ISO 11992-1:2019 Road vehicles. Interchange of digital information on electrical connections between towing and towed vehicles Physical and data-link layers
Source: BSI Standards