Does anyone know of an inexpensive obd-2 (iso) to serial converters which come with hardware/software that would allow me to simply "listen" to traffic on my i-bus and p-bus? There are 2 wires in the trunk for the cd-changer (+/- for the i-bus, the bus I want to listen to). Can I use simple TTL to serial converter with comlite or hyperterminal etc. connected to these 2 wires to listen?