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Power over OBD2 question
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So I have now got some CAN data over OBD2 logging, so I'm plugging the RCP into the OBD2 port as well as the regular hardwired switched powersource.

My problem is that the OBD2 port appears to always be powered, so the only way to turn off RCP is to disconnect it from OBD. I know that I'll forget to reconnect it before hopping on track at some point, so is it possible to tell RCP not to take power from the CAN port, and only from the switched source? If not is there a more elegant solution to turning it off than unplugging the OBD2 port?

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You can cut one of the ends off the RJ45 cable that connects the OBDII adapter to the RaceCapture and then put on a new end. Before adding the new end cut the wire that goes into pin 8 on the connector. Pin 8 is typically the brown wire.

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