[Luke Plaizier]

There's another broadcast message that might be of interest to some people on the MSCAN bus. This message is sent out by the factory Audio module and received by the Instrument Cluster. It consists of two messages one after the other using the same ID.

MSG1 is sent every 500ms, and MSG2 is sent 50ms after MSG1.

The header for this message is 4C0. After I change the volume to level 4, I see these:

MSG1: 00 00 00 04 C0 10 09 34 20 56 4F 4C 20
MSG2: 00 00 00 04 C0 21 34 20 00 00 00 00 00

Remove the 29 bit address from each to get this:
MSG1: C0 10 09 34 20 56 4F 4C 20
MSG2: C0 21 34 20 00 00 00 00 00

The bytes of interest are these:
MSG1: 20 56 4F 4C 20
MSG2: 34 20 00

Which in ASCII is:
MSG1: Space V O L Space
MSG2: 4 Space

Or another

MSG1: 00 00 04 C0 10 0A 34 31 30 32 2E 31
MSG2: 00 00 04 C0 21 20 46 4D 00 00 00 00

1 0 2 . 1 SPACE F M

MSG1: 00 00 04 C0 10 0A 34 48 4F 50 45 31
MSG2: 00 00 04 C0 21 30 33 32 00 00 00 00

H O P E 1 0 3 2


Space V O L Space U P

Space V O L Space D N

N O V A Space 9 6 9



Etc etc etc.


I can provide directions on how to use a cheap ELM tool to receive these messages, and potentially manually send out at least one message - if there is anyone interested...


Luke