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S300J Unable to Datalog
Posted: Tue Dec 23, 2025 6:44 pm
by kennythinggoes
I’m facing an issue with an S300J V3 board in a P72J ECU. I’m able to connect to the ECU using the laptop and upload changes, however I’m having difficulty performing data logging and reading the sensors from the car. I’m grateful if anyone is able to assist.
Re: S300J Unable to Datalog
Posted: Fri Jan 02, 2026 9:56 am
by Spunkster
Did you remove J4 (surface mount 0 ohm resistor) and transfer to J1 (located on the back of the circuit board)?
Re: S300J Unable to Datalog
Posted: Fri Jan 02, 2026 1:08 pm
by kennythinggoes
Yes, J4 has been removed and transferred in the position of J1 on the back.
Re: S300J Unable to Datalog
Posted: Fri Jan 02, 2026 3:31 pm
by Spunkster
From Help, About, what is the version of software you are using?
What are you clicking to begin datalogging?
Re: S300J Unable to Datalog
Posted: Fri Jan 02, 2026 5:46 pm
by kennythinggoes
In Help->About the version of the software is 2.8.9.0, Build 4941. To begin datalogging, I’m using the “lightning bolt” icon (Start/stop datalogging button labeled as F10).
Re: S300J Unable to Datalog
Posted: Fri Jan 02, 2026 5:59 pm
by Spunkster
With everything plugged in and the ignition in the on position, go to the Help menu and click on “send feedback”. Include a detailed description of the issue.
Re: S300J Unable to Datalog
Posted: Fri Jan 02, 2026 11:37 pm
by kennythinggoes
Feedback has been sent to Hondata.