I know one of the DIP switches can turn off ALL baro sensors for a 'limp home mode'. But most ECU's will also automatically (and temporarily) ignore any individual sensor that, for example, reports 0 or 5 volts, and substitute a fair assumption. I would think that is a pretty good idea. I know of the term code bloat but I think this is not bloating..

For the O2 sensor, this is even more important. For that sensor, an alternative is to just detect "not changing at all" for a given time, and automatically go open loop. The default LC-1 settings is to go to high impedance state at warm up and at error conditions. I had it set to output 0 volts at error for easier noticing of problems. Last summer it errored out while I did some spirited riding in Germany, unfortunately in Autotune mode. I'm not sure how much it messed up my map before I noticed the very lean running.

After that I set it to output 5 volts at error instead, since a 25% rich mixture wont hurt the engine. A couple of days ago it errored out again and no harm done (this time I wasn't even in Autotune). Still, it would have been nice if the ECU would stop believing an O2 sensor that does not change at all in several seconds.

As a side note, the bike ran surprisingly well at 25% rich 

Huberts sensor never failed, so noone will ever need input checking?

I doubt the CPU is anywhere near its limit performance wise. What makes you think that? And if we keep it at just watching for 0 or 5 volts (missing or shorted sensor), it's extremely little work for the ECU. A couple of lines assembler, dead simple integer comparison. No calculations involved. Depending on how Cliff layed out his software, it may not even have to be performed at every single engine revolution.

Besides any added O2 sensor,
does this mean that a failing sensor makes the engine stop/run badly?

And only way to fix this on the road is flipping Switch 2 to off?
From user manual:
Quote:


MyECU has no Limp Home Mode besides that option?

I think raz asked a fair question.

Quote:

When a sensor quits in the middle of nowhere 01.02
in the night on a small country road w no lights,
I`d appreciate the comfort of an Automatic Limp Home Mod. 

You`re so hardcore, luhbo.

Luhbo wrote on 07/01/09 at 22:34:53:

But it does send zero while warming up? LC-1 owners can configure it that way too. Then Cliff only need to check for zero volts. Zero volts means temporarily open loop - i.e. as soon as we have something else than zero we can opt to trust it. So you too would benfit immediately, Hubert 

Guys, that's leading nowhere. Limp on and have fun.
Hubert

Quote:

Would be real nice if the Limp Home Mod would be automagic in the new version coming.
Having to physically switch inside the ecu is a real drawback as I see it,
in the middle of the night at a dark road etc...

I think the code should use a default value for a failed sensor, There's nothing like being caught in the fast lane when your engine dies. Perhaps this override state could be signaled by sending the tacho to zero.