After way too long I finally found the message for the warning lights. It is on ARBID 592. It is an 8 byte message. Byte1 and the first bit of byte 2 are the "Error ID".
The error ID is referenced in documents for the "check control symbols" like this one. Before I found one of the documents I just made a program that cycled through the error codes one at a time. Found that not all the symbols are explained in the document.
Like this one to the right. It is error ID 153 (0x99). I expect this one is for a police version of the car. Anyway it made me laugh.
ARBID 592 as far as I have made out so far is as follows
length - 8
B0 - set to 40 seems to be for errors
B1 - Low byte of Error ID
B2 - First bit is part of Error ID. Rest unknown
B3 - the first bit indicates on or off. 1 on, 0 off. Other bits seem to effect how long it is on.
B4 through B7 are unknown. For the bulb check FF or 0 is there. Expect it has something to do with
conditions when the error was set.
Anyway have fun. Here is a video of my test bench showing a few of the symbols
