🚗 Automotive · Network
In-Vehicle ECU Network
How the electronic control units inside a modern car are connected: CAN and automotive Ethernet domains joined by a central gateway.
Drawing diagram…
What this diagram shows
- Powertrain, chassis and body ECUs sit on separate CAN buses
- Infotainment and ADAS use automotive Ethernet for bandwidth
- The central gateway firewalls the domains and the telematics unit
Prompt used
Network topology inside a car: a central gateway connects a powertrain CAN (engine ECU, transmission, battery management), a chassis CAN (ABS/ESC, steering, airbags), a body CAN/LIN (doors, lights, seats, climate), and automotive Ethernet for infotainment head unit, instrument cluster and ADAS ECU with cameras. The telematics control unit with 4G connects through the gateway, and the OBD-II port connects for diagnostics.
Mermaid code
flowchart LR
GW{{Central Gateway}}
subgraph PT[Powertrain CAN]
ENG[Engine / Motor ECU]
TRN[Transmission]
BMS[Battery Management]
end
subgraph CH[Chassis CAN]
ABS[ABS / ESC]
EPS[Electric Steering]
AIR[Airbags]
end
subgraph BD[Body CAN / LIN]
DOOR[Doors and locks]
LGT[Lights]
HVAC[Climate]
end
subgraph ETH[Automotive Ethernet]
HU[Infotainment Head Unit]
IC[Instrument Cluster]
ADAS[ADAS ECU and cameras]
end
ENG --- GW
TRN --- GW
BMS --- GW
ABS --- GW
EPS --- GW
AIR --- GW
DOOR --- GW
LGT --- GW
HVAC --- GW
HU --- GW
IC --- GW
ADAS --- GW
TCU[Telematics Unit - 4G] --- GW
OBD[OBD-II Diagnostic Port] --- GWRelated templates
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