VW Climatronic Diagnostic Codes

NOTE: This post has been back-dated to the year when I first published this information on my web page at istargazer.ca. This information applies to my 1999 VW Passat GLX which comes with the automatic climate control. (Stargazer, 28 December 2006)

The speedometer has a factory built-in error to show a speed faster than your actual speed. The Climatronic (automatic climate control) system includes a number of sensors that you can access through the diagnostic mode. To see your true speed in digital format press the following key combinations:

1. Press Fan Down, Temperature Colder, ECON at the same time.
2. Use the temperature control buttons to cycle through the various channels to Channel 16.
3. Press ECON to go back to normal. It goes back automatically when you restart the car.

This information was originally posted by Syncro Driver @ VWvortex forums:

There are a total of 45 diagnose channels numbered from 0 to 44. Some readouts represent a measured value and can't be altered--for example the amount of light that the sunshine-sensor on the dashboard measures. Others represent the actual adjustment and can be altered--for example the speed of the blower in 256 steps.

It's not possible to make permanent adjustments so don't be afraid to try it at your own Climatronic. (Stargazer's Disclaimer: I am not responsible for any damage which may occur to your vehicle by attempting to use these techniques.)

[quote]
"The channels that I know the meaning of are:

• 1 -- Interior temperature (sensor)
• 3 -- Sunlight sensor
• 7 -- Coolant temperature sensor
• 9 -- Blower speed (adjustable)
• 10 - Measured blower speed (sensor)
• 11 - Defog valve (adj. 0-255)
• 12 - Dashboard ventilation valve (adj. 0-255)
• 13 - Recirculation valve (adj. 0-255)
• 14 - Lower ventilation valve (adj. 0-255)
• 16 - Speed (sensor)

Btw, an audi climatronic had 72 channels of which I do have a list. The 45 of VW must be a selection of this list (also a Hella system as far as I know) but I just don't know which. Is there anyone who knows them all?"

- Syncro Driver
[/quote]

Update: Posted 6 Mar 2001 by Syncro Driver @ www.ClubB5.com

[quote]
Yes, sorry about my absence.. I have a company to run, a wife to attend, a car to drive, a house to (re-)build an a lot of miles to run for training a half or full marathon....

So to pay my debt I have the audi list here with my -very direct- translation for the first ten issues:

• Inhalt 1 Systemfehler = #systemerror
• 2 Ist-Wert Fühler virtuell = #actual value sensor virtual
• 3 Ist-wert Innenfühler Konsole = #actual value inner sensor console
• 4 Ist-Wert Außentemperaturfühler Wasserkasten = #actual value outside temp sensor water reservoir
• 5 Ist-Wert Außentemperaturfühler Stoßfänger = #actual value outside temp sensor bumper
• 6 Ist-Wert Ausblasfühler Fußraum = #actual value bloweroutlet sensor footspace
• 7 Ist-Wert Ausblasfühler Mannanströmer = #actual value bloweroutlet sensor dashboard
• 8 Displaycheck #
• 9 Ist-Digitalwert Rückmeldepoti Temperaturklappe = #actual digital value feedback potentiometer temp. valve
• 10 Soll-Digitalwert Temperaturklappe = #set digital value temp. valve
• 11 Ist-Digitalwert Rückmeldepoti A/C Klappe
• 12 Soll-Digitalwert A/C Klappe
• 13 Ist-Digitalwert Rückmeldepoti Fuß/Def. Klappe
• 14 Soll-Digitalwert Fuß/Def. Klappe
• 15 Ist-Digitalwert Rückmeldepoti Stauluftklappe
• 16 Soll-Digitalwert Stauluftklappe
• 17 Fahrgeschwindigkeit (km/h) = Channel 16
• 18 Istwert der Gebläsespannung (Volt)
• 19 Sollwert der Gebläsespannung (Volt)
• 20 Istwert der Kompressor/Bordspannung (Volt)
• 21 Anzahl Niederspannungsereignisse (nicht flüchtig)
• 22 Schaltzustand des Hochdruckfühlers
• 23 Anzahl Hochdruckereignisse (flüchtig)
• 24 Anzahl Hochdruckereignisse (nicht flüchtig)
• 25 A/D-Wert Kick-Down Schalter
• 26 A/D-Wert Heißleuchte
• 27 Motordrehzahl
• 28 Kompressordrehzahl
• 29 Codierung
• 30 Software-Version
• 31 Softwareindex
• 32 Potifehlerzähler Temperaturklappe
• 33 Potifehlerzähler A/C Klappe
• 34 Potifehlerzähler Fuß/def. Klappe
• 35 Potifehlerzähler Stauluftklappe
• 36 Temperaturklappe Anschlag kalt
• 37 Temperaturklappe Anschlag warm
• 38 A/C Klappe Anschlag geschlossen
• 39 A/C Klappe Anschlag offen
• 40 Fuß/Def. Klappe Anschlag Def.
• 41 Fuß/Def. Klappe Anschlag Fuß
• 42 Stauluftklappe Anschlag auf
• 43 Stauluftklappe Anschlag zu
• 44 Fahrzykluszähler
• 45 Innentemperatur gerechnet (Nine) dig
• 46 Außentemperatur gefiltert °C
• 47 Außentemperatur ungefiltert °C
• 48 ECOR
• 49 Fehlerzähler Tachosignal
• 50 Standzeit in min
• 51 Motortemperatur °C
• 52 Kompressor Abschalt-Bedingungen (Anhang)
• 53 Anzeige aktiver el. Ausgänge x x Kompressor Umluftventil x Wasserventil
• 54 Regelkennziffer
• 55 Außentemperatur °C
• 56 Innenfühler virtuell °C
• 57 Innenfühler Konsole °C
• 58 Temperatur Wasserkasten °C
• 59 Temperatur Stoßfänger °C
• 60 Ausblasfühler Fußraum °C
• 61 Ausblasfühler Mannanströmer °C
• 62 Sonnenintensität W/m² = Channel 3
• 63 Sonnenintensität gefiltert W/m²
• 64 Delta Lüfteranhebung
• 65 Delta A/C Klappenverschiebung
• 66 Zeitkonstante 1,8 sec
• 67 Kaltstartkorrektur
• 68 Maximale Stellgröße für I- bzw. P-Anteil
• 69 Ist-Wert Ausblasfühler Fuß (cnts)
• 70 Soll-Wert Ausblasfühler Fuß (cnts)
• 71 Abweichung (Epsilon)
• 72 Anteil (+heizen -kühlen)

Syncro
[/quote, emphasis added by Stargazer for clarity]

Translation by Shaggymatt @ ClubB5:

[quote]
Translated as:

• Contents of 1 system error # system error
• 2 actual value feeler virtually # actual VALUE sensor virtual
• 3 actual value of interior feelers console # actual VALUE internal sensor CONSOLE
• 4 actual value outside temperature feeler wasserkasten # actual VALUE outside temp sensor water reservoir
• 5 actual value outside temperature feeler bumper # actual VALUE outside temp sensor more bumper
• 6 actual value blowing out feeler floor space # actual VALUE bloweroutlet sensor footspace
• 7 actual value blowing out feeler Mannanstroemer # actual VALUE bloweroutlet sensor dashboard
• 8 display CHECKS #
• 9 actual digital value answering potentiometer temperature flap # actual digitally VALUE feedback potentiometer temp valve
• 10 debit digital value temperature flap # set digitally VALUE temp valve
• 11 actual digital value answering potentiometer A/C flap
• 12 debit digital value A/C flap
• 13 actual digital value answering potentiometer Fuss/Def. Flap
• 14 debit digital value Fuss/Def. Flap
• 15 actual digital value answering potentiometer ram air flap
• 16 debit digital value ram air flap
• 17 driving speed (km/h) 16
• 18 actual value of the blower voltage (volt) 19 desired value of the blower voltage (volt)
• 20 actual value of the compressor/on-board voltage (volt)
• 21 amount of of low-voltage events (not volatile)
• 22 switching status of the high pressure feeler
• 23 number of high pressure events (volatile)
• 24 number of high pressure events (not volatile)
• 25 A/D value kickdown switch
• 26 A/D value hot light
• 27 engine speed
• 28 compressor number of revolutions
• 29 coding
• 30 software-Version
• 31 software index of
• 32 potentiometer error counters temperature flap of
• 33 potentiometer error counters A/C flap of
• 34 potentiometer error counters Fuss/def. Flap of
• 35 potentiometer error counters ram air flap
• 36 temperature flap impact coldly
• 37 temperature flap impact warmly
• 38 A/C flap impact closed
• 39 A/C flap impact openly
• 40 Fuss/Def. Impact Def folds.
• 41 Fuss/Def. Impact foot
• 42 ram air flap impact on
• 43 ram air flap impact folds to
• 44 operating cycle counters
• 45 interior temperature counted (Nine) dig
• 46 outside temperature filtered °C
• 47 outside temperature not filtered °C
• 48 ECOR of
• 49 error counters Tachosignal
• 50 service life in min
• 51 engine temperature °C
• 52 compressor power-off conditions (appendix)
• 53 display more actively el. Outputs x x compressor circulating air valve x water valve
• 54 rule code digit
• 55 outside temperature °C of
• 56 interior feelers virtually °C of
• 57 interior feelers console °C
• 58 temperature wasserkasten °C
• 59 temperature bumper °C of
• 60 blowing out feelers floor space °C of
• 61 blowing out feelers Mannanstroemer °C
• 62 sun intensity W/m² 3
• 63 sun intensity filtered W/m²
• 64 delta exhaust rise
• 65 delta A/C flap shift
• 66 time constant 1.8 seconds of
• 67 cold weather starting correction
• 68 max. correcting variable for i or sectionsection section of
• 69 actual value blowing out feeler foot (cnts)
• 70 desired value blowing out feeler foot (cnts)
• 71 deviation (Epsilon)
• 72 proportion (+heizen - cool)

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99 Passat 1.8TM
00 Wagon 1.8T
Garrett Stage 1.5 w/ Tip chip/ITG Filter
[/quote]