Is it possible to repair the "Computer" (ICU)

[Snoopy]

> One final note on the car, before I write later: I'd recently discovered
> the on-board diagnostics available through the climate control. You can
> monitor anything from battery voltage to various temperature sensors. At
> the point at which the car shut off (and wouldn't restart) I was running
> it in diagnostics mode, flipping between the various codes to see what
> they showed (for example ''11" shows battery voltage). This could just
> be coincidence, but could it also be possible that the diagnostics mode
> somehow overloaded the ICU ?

I don't think so. I'm playing with AC diag almost every day, and never had any 
problems.