Hello,
I've been working on an SSM protocol based trip computer/data logger based on an Atmel AVR microcontroller. (90S8535 at the moment and a mess of wires on breadboard, but it is talking. Moving to ATMEGA32 or ATMEGA128 shortly.) I have hooked up an LCD display and can read and display data from the ECU when the ignition is on and the engine isn't running but after I start the engine the connection seems to break and I can't seem to re-init. I'm trying this on my MY02 liberty RX. Any ideas as to why the ECU wont respond with the engine running. I suspect that it may be blocking the comms becuase the diagnostic jumper isn't connected?
In the long term I would like to be able to calculate fuel consumption, display stats and perhaps log data to an SD card. Any opinions, suggestions or random guesses would be appreciated at this point.