KCANMonitor: Receive Messages Now!

Hello everyone,

Should the KCANMonitor automatically start receiving CAN messages, or is an initialization command required?

KOBD2Check is working perfectly and displays things like engine speed, temperatures, etc.

In the KCANMonitor, I repeatedly only receive a single message.
ID 0X17F00010 20 10 00 00 00 00 00 00
Immediately after the connection, at intervals of just a few milliseconds, and later at a rate of 500 milliseconds.

If I understand this https://en.wikipedia.org/wiki/OBD-II_PIDs) correctly, I first need to send a command to the CAN bus to, for example, retrieve the engine speed (ID 0x0C). However, in the video about KCANMonitor, it appears that the control units are constantly sending messages on the CAN bus, and all you have to do is filter out the interesting ones.

Best regards,
Michael.

Hello Michael,

Whether CAN messages are received directly from the vehicle's OBD-2 connector depends on the specific car model.
"This happens with some Fords, but it doesn't occur at all with Audis or Volkswagens unless you're sending the wrong signals."

In the KCANMonitor video, the CAN interface is directly connected to the CAN driver of an engine control unit (ECU), and as a result, data is constantly being transmitted.

Best regards, Rainer.

Hello Rainer,

Thank you for the quick response.

Then I guess I'll have to do a little more research on how to do that with my specific vehicle.

Best regards,
Michael.

The best way to do it with a VAG vehicle is to obtain the wiring diagram and connector pinout from Erwin (siehe Fehlerdatenbank) and tap into the gateway control unit, as all the buses converge there.

Best regards, Rainer.