RHH 2.0 HDi throttle body!

[ThomasH]

I have a question, why does my 2010 C5 X7 2.0 HDI RHH 163hp have a throttle body with two flaps? but one of the flaps has a dead end, for what?? I cant understand de purpose, its like it isnt even used, the flap is very clean, like new. Its very interesting, it also has a position sensor for the flap.

[GiveMeABreak]

It's normal and was a change from the previous DW10BTED4 engine. Ignore it.

[ThomasH]

Ok? But does it have any functionality? If yes which one?

[GiveMeABreak]

I did write something about this years ago, but can't find it now, but on the DW10C engine, the by-pass function is not active, the hot air (by-pass) flap is only activated in the event that the cold air (mixer) flap seizes.

Give me a minute and I'll get you a diagram

[GiveMeABreak]

Key:
"A" Fresh air
"B" Cooled compressed air
"C" Hot compressed air
"D" Air inlet
"E" Exhaust gas
"F" Control vacuum
"G" Electrical links

Reference	Designation	Electrical diagram correspondence
"a"	Turbocharger blades control diaphragm (With position copy sensor)	1374
(1)	Engine ECU	1320
(2)	Variable geometry turbocharger	-
(3)	Proportional electrovalve controlling the variable resistance turbocharger	1229
(4)	Air flowmeter by mass	1310
(5)	Air filter unit	-
(6)	Turbocharger air cooler	-
(7)	Double air mixer with position repeat sensors	13A1
(8)	Inlet air pressure and temperature sensor	13A3
(9)	Turbo air cooler by-pass control electrovalve	1285
(10)	Air metering unit control electrovalve	1361

[ThomasH]

So in figure 7 it’s supposed that an air mixture is happening, right?