I suppose the next question is...

What is the "Correct Voltage"?

I understand that these vehicles ARE rather sensitive to battery voltage and that failing batteries can cause issues, But what limits does the diagnostics use to decide whether there is a problem or not!

I can get "precise" voltages for cranking, idle, standby etc tomorrow but my impression thus far is that they are all well within what would be considererd "acceptable" for any normal vehicle.