Diagbox telemetry

[mfc]

1- on lance le scan de tous les calculateur sur le diagbox




2- on se connecte au calculateur MEVD17.4.2




3- on lance une mesure personnaliser




on retrouve bien les ligne
6A8 01 81
6A8 30 00 05
6A8 04 21 C0 80 01
avec les en-tête 6A8 et 688

The 6A8 address is used to request data and 688 is the reply (like on my car).

the data request command is:
6A8 04 21 C0 80 01

because the reply start with 688 10 ... the EC tell you that the reply is divided into several consecutive messages

6A8 30 00 05 is a flow control message
6A8 04 21 ... (consecutive frame Sequence number =1)
6A8 04 22 ... (consecutive frame Sequence number =2)
6A8 04 23 ... (consecutive frame Sequence number =3)
etc...

I think that your ecu send only data groups and not just one single piece of data like the ecu on my car.

With your CAN bus logger, you have captured the 488 message:
for example, the first message, 488 5E 00 67 84 1E 54 FF 3C can be decoded as:
the water temp is +54°C
the fuel consumption is 0 (the engine is stopped)
the requested idle speed is 824 RPM
the calculated oil temp is +44°C
the manifold air temp is +20°C