It's an interesting learning curve watching a BMW tech. run through Moditec diagnostics on your bike and I recommend you be present if you can. I'm afraid when you own a bike with a computer ECU, some of the things you've taken for granted, are now only conveniently displayed on a pc screen. I say conveniently, because with some discrete test instruments you could probably arrive at something similar but with a lot of work.
I can now look at my O2 sensor and see the same display they do, but then their advantage is a big plug, an automated test procedure and you get a printout to boot. If you don't believe me, try working out if your Throttle Position Sensor is right or not - and that's responsible for your entire mixture range. They can see this on one simple screen in seconds, adjust it and get it right. The same is true of timing, as the hall effect sensor waveform is shown superimposed on the injection pulse cycles in real time with the bike running. Forget strobes and timing marks on these EFI engines. If you strip a bike and mess with this stuff, it's really far easier to just pay the 1/2 hour diagnostics charge afterwards. I think your VIN number and some other stuff is stored in the ECU chips memory as well. Handy to know in a stolen bike/disputed ownership scenario.
I've always moaned about manufacturers having intellectual property rights over their diagnostics as if they still owned your bike. Dealers have a right to moan to, when a proprietary 'Moditec' tester costs them thousands and bright software kiddy with the right protocol and interface information could do the same thing for a pc and post a program on the net just for the hell of it.
I read there has been some changes in EU law which forces car manufacturers to be open and standardise their diagnostics protocols and interfaces. You may be familiar with OBDII and you can buy 3rd party fault code scanners for your cage now., Especially GM vehicles.
Unfortunately,I read motorcycles weren't included as 'vehicles' in the EU directives - we didn't represent ourselves or shout loudly enough!
So there you have it, diagnostics should be something the bike rider owns, but really rents from BMW when they think they need it!
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