Debugging Harley LiveWire Bluetooth and iPhone Issues, Part 3

Look at what I found printed on the bottom of my LiveWire’s display unit:

Two immediately interesting bits of information there — a Harley-Davidson part number (70900801) and an FCC ID (SQGBT850).

A bit of quick googling finds 70900801 is “INSTR,CLSTR,DIGITAL” (Instrument, Cluster, Digital). There’s even one on eBay right now. Google also turns up this NHTSA copy of a LiveWire Service Bulletin from late 2019  — which dumps a few acronyms (as an engineer, I love acronyms) on us, including “IM” (Instrument Module) as the proper name for the display unit.

But it’s that second bit of information printed on the Instrument Model – the FCC ID – that’s more useful to me however for figuring out the Bluetooth flaws. (I was surprised I could NOT find this in the motorcycle’s manual, btw.)

Knowing that FCC ID (we’re doing something similar at work btw – using FCC IDs to look at the reports for various Bluetooth devices we are working with) leads me to this: Laird Connectivity Bluetooth 4.2 Dual Mode USB HCI Module, Bluetooth 4.2 Dual Mode UART HCI Module BT850the Bluetooth module at the heart of the LiveWire Instrument Module.

And that page has user manuals for that module that should help me as I debug further. Stay tuned!

You can find Part 1 here and Part 2 here, btw.

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