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New Application Note: AN05 – Bench Testing OBD Interfaces

This Application Note provides some tips on testing your OBD Interfaces before connecting them to a vehicle. It’s a collection of some of the more common issues that we’ve been asked about over the years, with an emphasis on testing the CAN protocols. If you are building your own circuits, you will likely find this note to be helpful.

Visit our Application Notes page to download this Note.

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The ELM328 has been updated

The ELM328 IC has been updated to support all of the ELM327 v1.4 AT Commands. You still can not send any OBD commands with it, but we have changed the responses when you try (it now acts as if there is no ECU connected).

Note – This IC is only for developers that need to try the @2 and @3 commands multiple times with their software. It is not for use in scan tools.

pdf download
ELM328
data sheet
(14K pdf)