[john70t]

PDF of the Lexus C/OPN
https://www.clublexus.com/forums/gx-1st-gen-2004-2009/954167-that-tricky-c-opn-relay.html

Prius info on the relay. Not the same thing but a good discussion.
https://priuschat.com/threads/need-to-know-where-the-c-opn-relay-is-with-image-if-possible.153355/#:~:text=C%2FOPN%20relay%20is%20part%20of%20the%20 integrated%20relay,but%20not%20start%20%28Prius%20 cranking%20sound%20like%20running%29.