Understanding Modern Diagnostic Protocols
As vehicles become more advanced, diagnostic protocols evolve. Two protocols are now essential: DoIP (Diagnostics over Internet Protocol) and CAN-FD (CAN with Flexible Data-rate). Here is what you need to know.
What is CAN-FD?
CAN-FD is an evolution of the traditional CAN bus. It supports faster data transfer rates and larger data payloads. Modern vehicles use CAN-FD for systems that require rapid communication, such as ADAS and advanced engine management.
What is DoIP?
DoIP allows diagnostic communication over Ethernet. It is significantly faster than traditional protocols and is becoming standard on newer vehicles, especially those with over-the-air update capabilities. Many Chinese and European brands now use DoIP.
Key Differences
| Feature | CAN-FD | DoIP |
|---|---|---|
| Speed | Up to 8 Mbps | 100 Mbps+ |
| Physical Layer | CAN Bus | Ethernet |
| Typical Use | Sensor data, ECU communication | ECU flashing, large data transfers |
| Vehicle Support | 2018+ models | 2020+ premium models |
Which One Do You Need?
For a future-proof workshop, you need both. The TopTekk CW700 supports both CAN-FD and DoIP, covering Chinese brands (Geely, Chery, Haval) to European vehicles. Do not settle for a scanner that only supports one protocol.
TopTekk Advantage
Our OBD2 scanners are built with the latest protocols in mind. Free lifetime updates ensure your scanner stays compatible as new vehicle models are released.