Bosch DBW with M400

[Stef@Ins]

I need some help on wiring and setup of Bosch DBW system found on Audi TT 1.8T.

I remember that in the past was a drawing avaliable for download but not anymore.
In addition firmware 3.50 has added parameters.

[RossB]

You will need to contact your MoTeC dealer for this information and help with DBW setup.

[Stef@Ins]

I came in contact with my dealer and he provided wiring schematic and parameter setting instructions.

It's working fine,with accuracy and quick response.
I am only facing an issue with high-rpm idle.With idle controll off i got idle at 1600rpm.

At Throttle Position Translation Table i got 0% at 0%driver's request(tpd).

What i can see is that the throttle plate is opened for a few degrees with tpd=0 and tps=0.
That's the default position where the plate sits with the throttle body off the car too.

I can't figure out which parameter can force the throttle against the spring to make it close completely.
I forced the butterfly with my finger to the fully closed position and recalibrated the tp/tpd closed and open values.

What i received is a non responsive throttle.

[IJ.]

My understanding is that the position translation table is overridden by the idle control parameters.
(I use 0 TPD = .6% TP) then use the idle control to drive it to the idle speed.

As mentioned on efi101 Bosch DBW here as well.

[MarkMc]

Hi Stef,
The TP Closed and TP2 Closed should be set at the same time with the throttle plate closed almost all the way (you can use a feeler gauge to get the base idle right). Setting TP Closed and TP2 Closed at the point where the spring holds the throttle plate is not a good idea...as you have found out.

A process to make sure all your throttle position settings are recognized by the ECU is to go into the Throttle Position Hi/Lo screen do all of the neccessary changes and then go out of that screen before you reset the ECU.

You should get the throttle body working correctly and a good idle speed (engine hot) before you turn on the DBW Idle function in the Auxiliary Output 2.