On Wed, Mar 3, 2010 at 10:22 PM, YES NOPE9 wrote: > Is OBD II a standard on cars built after 1992 ? 1996, however it's not a simple standard. There are 5 different communication standards, although if you limit yourself to only the newest vehicles (2008 and later) then you may be able to stick with just CAN. > Will OBD II provide odometer readings ? The standard does not define a message for this, but the vehicle may have manufacturer specific messages that provide this. > Will OBD II provide engine RPM info ? Yes, Mode 0x01, PID 0x0C > Will OBD II provide speedometer info ? Yes, Mode 0x01, PID 0x0D > Will OBD II interact with door locks ? The standard does not define a message for this, but the vehicle may have manufacturer specific messages that provide this. > Will OBD II shut down an engine ? The standard does not define a message for this, but the vehicle may have manufacturer specific messages that provide this. You will either have to figure it out yourself, or contact the manufacturer and go through the long process of getting them to divulge that information. They may be unwilling to do so for liability concerns. You can also buy manufacturer specific message databases from those that have deciphered some subset of the vehicle bus message list. It may be simpler for you to focus on vehicles with push button start, and interface with the pushbutton to stop the engine, although I think that's a pretty risky thing to do remotely. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist