Most of the time ECU flashing works without a problem but there is always the small chance that something could go wrong. ECUs from different manufacturers all have their unique characteristics as well as potential problems too.
The Woolich Racing Tuned software is used to read/write information from an ECU and uses different communication protocols based on the specific ECU. Sometimes there are problems with the communication and an error like "Failed to unlock protocol" is shown in the software.
This error can occur on ECUs from different manufacturers however this article specifically applies to Harley Davidson ECUs. If you see this error when working on a Harley Davidson ECU this error could indicate that the ECU has been locked by another software. In this case please try to read the ECU Part Number and Read the VIN to check whether basic communication is still working.
If you are able to read the Harley Davidson ECU part number, serial number and VIN the please try and read the ECU:
If you are unable to read the Harley Davidson ECU and you see an error message like 'Failed to unlock ECU Protocol' then please
Open a Support Ticket so that we can assist you further.
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