Help thread: MT-09 OBD2 scanner shows no communication

For MT-09 OBD2 scanner shows no communication, I would not start by clearing codes. Photograph the code, check battery voltage at rest and while cranking, then inspect the connector related to the system. A weak supply can make a scanner sound more dramatic than the bike really is.

Also check whether anything was changed recently. The last hands near the bike are often the first suspect, even when those hands are our own. That is how I would approach MT-09 OBD2 scanner shows no communication before spending money.

For MT-09 OBD2 scanner shows no communication, is there a measurement that proves the part is bad, or is it mostly elimination?

Thomas Spagnoli: workshop approach for MT-09 OBD2 scanner shows no communication

With MT-09 OBD2 scanner shows no communication, the useful question is not 'what part is famous for this?' but 'which system stopped doing its job, and under what condition?'

1. Record the exact code, freeze-frame data if available, and whether MT-09 OBD2 scanner shows no communication returns immediately or only after riding.
2. Check battery voltage, charging voltage, main grounds, and scanner connection quality before trusting the code as a failed component.
3. Inspect the relevant connector for spread pins, moisture, corrosion, and loom tension near steering head or engine heat.
4. Clear the code only after writing it down, then reproduce the condition and see what comes back first.

The mistake I see most often with MT-09 OBD2 scanner shows no communication is jumping to the part that sounds most famous. A good mechanic proves the system first: supply, command, output and mechanical condition.

This is also the kind of method I teach in the free Motorcycle Mechanics Course here on the platform: observe, measure, confirm, repair, then test again. It is much easier to solve MT-09 OBD2 scanner shows no communication when the process is clear.

If you report back, include the measured values, not only whether it felt better. Numbers make the thread useful for the next rider too.

I have enough to work with now. No heroic parts cannon today, just tests, notes, and hopefully fewer dramatic noises. I like that this turned into a checklist instead of a guessing contest.