So, has anyone discovered the little Easter Egg I left in these automatic controls yet?
Back in 2009 I was arguing (surprise) with Germany about making a diagnostic mode for these controllers that would give me quick on-the-fly access to variables inside the controller. The Audi controllers we developed had a slick secret button press that would change the display in a data monitor of sorts. I really wanted to port this feature over to the WK2 controller, but our Germany office refused to help.
So, while sitting on the can one night at home, I engineered the following procedure:
1. Push and hold the AC button
2. Push and release the power button
(screen turns off)
3. Release the AC button
(within three seconds, perform steps 4 and 5)
4. Push and release passenger temperature UP button
5. Push and release the passenger temperature DOWN button
And now you're looking at some sweet diagnostic data!
What used to be the driver temperature on the left is now your channel number. What used to be your passenger temperature on the right is now your data.
In the event that the data is more than two digits of precision, the number will flash: INTEGER (one second) --> DECIMAL (one second) --> BLANK (one second)
For example, 22.50 would be displayed as: 22 (one second) --> 50 (one second) --> blank (one second)
Use the blower knob to change the channels. In a two zone system (WK) there are 24 channels. In three zone systems (WD and RT) I think there's 32 channels. You gotta forgive me, it's been almost six years since I've designed this and I have since moved on to a different job / company.
1 Drive Energy Level (blacked out on production modules)
2 Passenger Energy Level (blacked out on production modules)
3 I forgot... blacked out anyway on production modules
4 I forgot... blacked out anyway on production modules
5 Drive duct outlet temperature target... I think
6 Drive duct outlet temperature target... I think
7 More stuff I forgot about the driver side
8 More stuff I forgot about the passenger side
9 Targeted evaporator temperature (I might have this and channel 10 swapped... it's been a while)
10 Evaporator temperature (when the AC compressor is running, the AC led will turn on. Pretty cool, eh?)
11 Mode distribution flap position. 0 = defrost, 50 = floor, 100 = panel. Extrapolate accordingly
12 Recirculation door position. 0 = fresh, 100 = recirc
13 Driver temperature blend door position
14 Passenger temperature door position
15 Blower speed (min = 20% IIRC)
16 Door actuator fault codes (0 = all is clear)
17 Software Version
18 Driver solar load
19 Passenger solar load
20 Combined solar load
21 Interior temperature
22 AC pressure (I think)
23 Coolant temperature (I think)
24 Outside temperature
Have fun, kids.