extra byte in engine speed response

Hi everyone,

I've just gotten my Multiplex Engineering interface operational on my
Subaru and noticed something odd after sending an RPM request; all of
the responses have three bytes of data.

The first two are the mandated high and low bytes of the RPM, but
what does the third represent? When the engine is shut off, the
third byte is 0xe1 (consistantly).

Any ideas?

jim

 
Received on Sun Dec 02 09:46:00 2001