Can't enter climate control diagnostic mode

[ceeeeej]

First post here.... I have two issues currently with my 2005.5 A4 B7.

1. I have a CEL P0299 which is a turbo under boost. Seems like a fairly common problem and I need to check out the DV for cracks. Ok, no problem, I will do that.

2. I also don't have any cold air coming out of the AC. I checked the low pressure line and I see that the system is charged so I don't need to refill that. I read about this procedure to enter diagnostic mode on the climate control system:

Press and hold the recirculation button. Then press the manual flow control up arrow. You should see a 1c. Press the temperature up ("+") or down ("-") buttons to select a code number. Then press the recirculation button again. The value should display. Press the temperature up or down button again to display another code.

I suspected the CEL was causing the climate control to not enter the diagnostic mode. This is not the case since I cleared the CEL with a code scanner and now I still can not enter climate control diagnostic mode. The above info I posted is all that I can find regarding this diagnostic mode for Audi A4's 2000+. Is there any other information out there? I saw in the B7 FAQ that certain AC systems are prone to failure but there was no other info on it.

Thanks!

[Tanner]

That diagnostic mode is for the B5 only.

[ceeeeej]

Thanks Tanner.

Is there any similar diagnostic mode for the B7 that I can read the climate control codes with?

[Tanner]

Nope - you need a vagcoom tool and then look at the measuring blocks.