The ELM 322 is for connecting to an OBDII equipped vehicle which uses the 10.4KHz J1850 VPW format. This standard is typically used in General Motors Corporation and some DaimlerChrysler vehicles. The user need only issue the desired commands through an RS232 serial connection and the data formatting, error checking, bus arbitration etc. on the vehicle side is all taken care of by the ELM322.

This allows experimenters to inexpensively create their own 'scan tool'. If you presently use one of our v1.x ICs, you will be pleased to know that the new version is pin-compatible with the old, so you can simply replace your IC if you want to upgrade.

DataSheet for "ELM322" from ELM Electronics.