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Troubleshooting Checklist


Having difficulty reading and/or writing to the ECU? Here’s our 'Troubleshooting Checklist'.

Problems related to reading and writing an ECU are generally not software related. They are generally caused by one of the following issues:

  • Harness Connection/Installation issue:
    • Check the Installation Guide and double check each step of the install.
    • Check you have fitted any extension harness correctly to the ECU plug.
    • Check all the wires are firmly locked into the ECU plug, and are not loose.
    • Check your diagnostic plug is clean, and making good contact (if used)
  • Low or Loss of Power to the ECU:
    • Battery power should be 12.8v or more.
    • Run/Stop switch must be in the RUN position.
    • Check for a loose connection between the Interface and the ECU
    • Do not move the interface/harness during flashing (aka loose connection)
    • Connect a battery charger at the same time, (So the battery does not drain while flashing)
    • Check you are switching the Ignition key on/off at the right time. (follow software prompts)
  • Computer interrupted the write process:
    • PC should be checked that all updates are installed, and has been restarted.
    • Check the PC is not busy doing background tasks
    • Check your PC is powerful enough to keep up with the ECU write speed (Minimum Dual Core 2.4Ghz, 4 Gig Ram. Recommended i5 with 8 Gig Ram)
    • Check your USB port is not worn out (try another USB port)
    • Use the supplied USB cable. Do not use a long cable.
    • Check your PC Battery is fully charged if using a Laptop.
  • We also have a range of interface Troubleshooting Videos if you believe that your USB or Log Box interface has a fault. 
Other things to note: 
  1. If the ECU has been flashed by either a send-in service or any other flashing service before, it has more than likely been locked by that service. Please run the unlock function if available. Sometimes the ECU may have to be sent back to the original source to get returned to stock.
  2. Please check you are using a high speed USB 3.0 compatible USB Port on your computer.
  3. Your computer meets our recommended PC Specifications.
  4. If you are performing multiple flashes on a legacy v1 or v2 interfaces , remember to move the interface mode switch into the center position, then back to flashing mode (red led on), before attempting another write/read operation.
If you are still having issues troubleshooting and have completed all of these checks, please open a Support Ticket.



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