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S300 won't power up

Posted: Sun Jul 19, 2026 5:33 am
by 7rrivera7
A customer brought in his ECU for repair stating the car was idling really low and smelled of gasoline. When I ran diagnostics, the ECU is in limp mode and the S300 does not power up or light any leds. I verified the ECU with another S300 and the ECU runs fine. I also tried his S300 in another ECU and it does not power up

- serial number of the s300 inside the ECU - 41438
- version of software being used (Help, About) - 2.8.9.0
- the calibration (as an attachment) - attached (requested from the customer)
- a datalog of a problem - unable to connect as the S300 does not power up
- 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 won't power up

Posted: Mon Jul 20, 2026 9:08 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:

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