Page 1 of 1

S300 not recognized by Windows

Posted: Sun Jul 19, 2026 11:54 am
by 7rrivera7
Customer brought in his ECU with S300 and says he can no longer connect his laptop to make changes to the calibration. I tested the S300 in another ECU and it does not connect and I tested another S300 in the customer's ECU and it connects fine. Windows does not detect the USB and the S300 does not come online.

- serial number of the s300 inside the ECU - 54585
- version of software being used (Help, About) - 2.8.9.0
- the calibration (as an attachment) - cannot connect to download but it is valid as the ECU runs fine on my SIM
- a datalog of a problem - unable to connect, Windows does not detect the USB and the S300 does not come online
- what sort of vehicle you have - Civic
- what sort of ECU you are using - P28

Let me know if you need any other information to request an RMA for service. Thanks!

Re: S300 not recognized by Windows

Posted: Mon Jul 20, 2026 9:09 am
by Spunkster
Send an email to support <at> hondata.com with the following and I will issue an RMA and give you further
instructions:

Name:
Address:
Phone:
Email:
Serial#:
Description of problem:

Include a link to this thread