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System had an EVAP purge canister valve (said 'auxiliary air control' earlier) also:

I'm not sure whether this is part of current motronic config or it comes from some jetronic system. Harness was connected however.

options

* leave it out and block its connection from throttle body.

* or you can control it from GenBoard. A purge canister can trap significant amount of gases (useful in the engine, unwanted in the athmosphere unburnt) escaped from the tank on a hot summer day (such as today).

** resistance is 46 ohms. This might be a useful idea, but has low priority at the moment :)

** actually I used the drill in throttle body for [IAT]