Change the airflow direction on Climatronic

Hello,
"I have a small problem with the air distribution for the interior of my Golf IV, manufactured in 1998, which has Climatronic. In my older Golf, I could easily adjust the air distribution using a lever, directing more air to the windshield or the footwell, which worked great. In my current Golf, this is controlled via the Climatronic, with options for automatic mode, full airflow to the windshield, to the body, or to the footwell. When it rains, I have a problem where the windshield fogs up in city traffic, and I constantly have to press the "-" button to clear it. Is there a way to influence the air distribution so that it is better regulated?" I'm thinking about adjusting the basic settings to allow for slightly more airflow to the windshield when it's in the normal position. The pollen filter is new.
Has anyone had any experience with this, or have any tips?

"I haven't experienced the problem you described with my Climatronic (also in a Golf 4). When it's raining, simply press the button with the windshield icon. If you want more airflow on the side windows, press that button again. There are definitely settings that can be changed, but I can't tell you how. I only know how to read them using the "diagnosis mode." I'm not sure if you can change them that way. I don't want to lie; I always have to experiment with it in person. You need to press three buttons simultaneously (I think it's the warmer, faster blower, and Econ buttons), and then you'll be in a menu where you can navigate using the temperature control buttons." I need to look for something; I think I have a table somewhere that explains what each of the channels means.

So, the problem you described, I don't experience with my Climatronic (also a Golf 4). If it's raining, simply press the button with the windshield icon on it. If you want more on the side windows as well, press that button again, and so on.


That's exactly the problem. The windshield should actually always have a slight amount of airflow. VW has once again made a glaring mistake. When the air conditioning is on, it blasts cold air that's deafening, and when the heating is on, while your feet are warm, the windshield eventually fogs up because it doesn't get enough air.

What's the point of having Climatronic if I have to press all those annoying buttons?
The AUTO mode is quite silly; other manufacturers do it better.

CU Gremlin.

Then I know now that nothing is broken.
If I've understood correctly, the airflow is controlled by actuators. Now, I'd like to know if it's possible to influence these actuators. I don't want to keep pressing that stupid button over and over again.
Does anyone know if the actuators only have limit switches, or are they stepper motors that can perhaps be configured with different values?

Ford also has the same problem with the automatic climate control system in the Focus.

@wutz:

Hi,

You can choose any combination of "disc," "man-streamer," and "footwell" – just press the corresponding buttons in sequence, and it will start emitting sound everywhere.
However, it's questionable whether it's worthwhile. Every HVAC planner knows that warm feet and a cool head are essential for comfort. The CT (control unit) is designed accordingly, and the control strategy works – in my opinion – absolutely excellently. In my system, a small amount of air also comes out of the diffuser, and even with slight condensation, the window is clear after 20 seconds in "Auto" mode after starting. The CT system wasn't quite perfect in the Golf III, but in the IVer, I really don't see any reason to complain.

When I'm in a car with manual ventilation, like our second-hand Polo 9N, I'm never really satisfied with the air distribution and I find myself constantly adjusting it. Even though we have a Climatic system with automatic temperature control. Just drive a car with manual ventilation once, and you'll be perfectly happy with the CT again .

In diagnostic mode, it is not possible to permanently reprogram any of the default strategies.


@all:

For those who are interested, I have a complete list that works perfectly well with my 2002 Golf model. However, it is usually not the case that all channels are occupied.

Perhaps it could also be incorporated into a research article (?).


Read error codes.
Please provide the German text you would like me to translate.

Activation: The actuator test is initiated by simultaneously pressing the "ECON" and "recirculation" buttons for a duration of t >= 2 seconds. Þ Test active.

Description: By pressing "Temp +", the next error will be displayed. Press "Temp +" Þ XXX (next error) After all error codes have been displayed, the following message appears: 000 Þ Output End If no error is present, the following code appears: 444 Þ No error detected.

Clearing the error memory: After the display shows "000" (indicating no further errors), the error memory can be cleared. Press and hold the "ECON" button for at least 2 seconds. A confirmation message will appear: "444" indicating no error detected.

Exit mode: Briefly press the "ECON" button.

Data source | Error location | Error type
FFFF ECU 0x25

0119 Speed sensor 0x25
0214 Supply voltage 0x06, 0x07
021A Reference voltage 0x06, 0x07.
0510 Temperature sensor, blow-off air inlet (1296) 0x1d, 0x1e.
0511 Temperature sensor, footwell (1297) 0x1d, 0x1e

030B Temperature sensor, outdoor temperature, bumper, 0x1d, 0x1e.
0311 Temperature sensor, control panel (inactive).
0313 Temperature sensor, fresh air intake duct, addresses 0x1d, 0x1e.
0332 Temperature sensor, evaporator, addresses 0x1d, 0x1e.
0333 Refrigerant pressure sensor.

0318 Pressure switch for air conditioner 0x23.
031C BEMO temperature sensor (inactive).
031D Photosensor for sunlight detection 0x1d, 0x1e.

0382 Compressor valve.
04F7 Temperature flap control motor 0x25.
04F8 Central locking actuator 0x25.
04F9 Fresh air blower 0x25
04FA Servo motor for static pressure control valve 0x25.
025B Foot/Defrost flap actuator 0x25.
04B6 Dwell time signal 0x25.
0538 CAN-Bus
0513 Gateway.
053D Combination.
04AE Gateway - Data base version.

0414 Control unit not coded 0x23
043F Initial adjustment not performed 0x23

062E Signal for coolant temperature (inactive).

Actuator test.
Please provide the text you would like me to translate from German to English.
Prerequisites:
* Engine speed
* Vehicle speed
* Voltage: KL_15 = 0 = 0 < 15.5 V

Activation: The actuator test is initiated by the following procedure:
* Simultaneously press and hold the "ECON" and "RECIRCULATION" buttons.
* Turn on the ignition.
* Continue holding the above button combination for at least 2 seconds.
* The test is active (all segments appear in the Climatronic display).

Description: The now fully automated actuator test (duration approximately 30 seconds) involves controlling the actuators according to a predefined time sequence. Additionally, the peripherals of the control unit (sensors, motors, fresh air blower, pressure switches), insofar as the diagnostic conditions are met (see diagnostic specification), are diagnosed. Before and after the actuator test, the system software monitors the actuators. During the actuator test, all buttons are locked, and all segments of the LCD are activated. An initiated actuator test cannot be interrupted either via the keyboard or the VAG tester. After completing the self-test, the control unit automatically switches to the mode: "Read error memory via keyboard" (see documentation). The description of the test procedure is provided in the VAG documentation.

Onboard diagnostics.
Please provide the German text you would like me to translate.

Activation: The HELLA diagnostic process is initiated by simultaneously pressing the "ECON," "SW-," and "FAN-" buttons. The temperature buttons (SW+/-) are used to increment or decrement the diagnostic channel number. The channels highlighted in gray can be frozen using the fan control buttons (FAN +/-).

DIAGNOSTIC CHANNEL DISPLAYED SIZE DIMENSION
0 Program number Dig.
1. Internal temperature (°C)
2 Solar intensity, delayed * 10 W/m2.
3 solar intensity * 10 W/m2
4 Outdoor temperatures, delayed °C.
5 outdoor temperatures. Bumper °C
6 outdoor temperatures. Intake manifold °C
7 recommended exhaust temperatures. Footwell temperature °C.
8 recommended exhaust temperatures. MAS °C
9 BLOWER fans, nominal voltage: 0.1 V.
10 blower fans, 0.1 V.
11 SOLL_Temp. - Digital control valve.
12 SOLL_Zental Valve, Digital.
13 SOLL_Uml./Staul.-Klappe Dig. (This likely refers to a digital control valve for flow or pressure regulation.)
14 SOLL_Foot/Deflection Flap Digital.
15 engine running time seconds.
16 km/h speed.
17 START_AP Dig.
18 Uml./Fresh Air Threshold Dig.
Please refer to the appendix for the compressor discharge code.
20 PI_STELLMAX Vent. Reg. Okay.
21 INT_STELL Dimming Regulation. Okay.
22 Epsilon, Bleed-resistant. Okay.
23 Actual outlet temperature, °C.
24 Desired outlet temperature: °C
25 - End stop, temperature flap, digital.
26 RMP_Temp. Flap, Digital.
27 + End stop Temp. flap Dig.
28 - Digital central gate end-of-travel switch.
29 RMP_Zental-K. Okay.
30 + End-of-travel switch, central valve, digital.
31 - Digital end-of-travel switch for valve/damper.
32 RMP_Uml/Check Valve Dig.
33 + End-of-travel switch / Blocking flap, digital.
34 - Foot switch end-of-travel/Definition flap, digital.
35 RMP_Foot/Deflection Flap, Digital.
36 + Foot switch end-of-travel/Definition flap, digital.
37 minutes of dwell time (255 = no telegram).
38 Compressor PWM Dig (0...200)
39 Setpoint temperature for evaporator °C
40 Actual evaporation temperature °C
41 I-Stell Vaporizer, Digital.
42 Epsilon Vaporizer, Digital.
43 bar refrigerant pressure.
44 BiLevel/MAS threshold digits.
Engine temperature: 45 °C.
46 Actual compressor current in mA.
47 mA, required compressor current.
48 Compressor Max. Current mA
49 RPM compressor speed: 100/min.
50% cooler fan control signal.
51 Wiper settings 0 = off; 1 = intermittent; 2 = on.
52 Fdk correction related to the windshield wiper - digital.
53 Blow molding correction factor, depending on windshield type * 0.1V.
54 Basic Number.
55 VW number.
56 HELLA part number.
57 Test-1
58 Test-2
59 Test-3
60 Test-4

Extended diagnostic channels for CAN variants.
DIAGNOSTIC CHANNEL DISPLAYED SIZE DIMENSION
Reception data.
61 free.
62 Terminal 15 Bit.
63 Hotspot Bits.
64 Outside temperature, filtered °C.
65 Climate Control Bit.
66 Motor speed x10 RPM.
67% dimming.
68 Bit Map Cooling.
69 Country variant 2 = USA / 1 = Japan / 0 = Rest of the world.

Transmission data.
70 free.
71 Auxiliary heaters (PTC enabled) bits.
72 Compressor (Compressor on) Bit.
73 heaters made from wood chips.
74 degrees Celsius (outside temperature). Unfiltered water dispenser, temperature in Celsius.
75 Nm of compressor load.
76% air-filled space.
77% cooler fans.
78 Customer Service Error Bits (Error Memory).

Name: Compressor Disconnect Code (Appendix to Diagnostic Channel 19)
Shutdown code
Compressor shutdown condition
0 None.
1. High-pressure event.
2 faulty bulbs + Uist <3V> 118°C.
12 Motronic interface.
13 pages. KL_15 > 17V
14 Function: Vaporizer temperature.
15 without vehicle coding.
16 Comp. current.
17 pressure sensors defective (only with external regulation). Compressor)
18 Engine speed (only for B5W8)

SYSTEM ERROR.
Please provide the text you would like me to translate from German to English.

Module description:

Blinking light indicates a system error:

If a system error was detected in the last operating cycle, all segments of the LCD will blink for 15 seconds after the ignition is turned on, with a frequency of 2 Hz.


The following errors detected during stationary testing (error count = 50) lead to a system error:

- VAG diagnostic function 04: Initialization not performed.
- VAG tester function 07: Parameter coding not performed.
- External sensor (intake manifold) and external sensor (bumper) are defective.
- Defective pressure switch/sensor.
- Internal sensor defective.
- Reference voltage (ext. Sensorspg.)

Gremlin wrote:

... That's exactly the problem. The windshield should actually always have a slight amount of airflow. VW has once again made a glaring mistake. When the air conditioning is on, it blasts cold air that's deafening, and when the heating is on, while your feet are warm, the windshield eventually fogs up because it doesn't get enough air. ... CU Gremlin

Okay, so with my Golf 4, the windshield usually always has some condensation. Even when the heating is on. Fogged-up windows actually only happen in the ECON mode during extreme rain. Then the AUTO mode reliably and quickly provides assistance.
Even when running in cooling mode, the fan only reaches hurricane-force speeds for a few minutes if the device has been exposed to direct sunlight.
Are there different software versions available? Or could there be a faulty valve or sensor in your system?

That would also be my guess. That's why here's the guide on how to access the error memory.

Thank you very much for the detailed information. I'll go test it out right away. I hope everything is already set up like that on my 1998 Golf. After the last test, there is no noticeable airflow coming from the upper vents in the car's operating mode, only when I press the button for the windshield defroster.
Well, let's see.

Are there different software versions?

Yes, there is...

But the auto mode in version 2 is so bad...

CU Gremlin.

Hi Roger,

Your list is really great! I've added you to the 'Authors' user group, which means... You can be there now.
/viewforum.php?f=13

Create entries that will then be "linked" to the relevant subject articles.

Best regards, Rainer.

Hi,
I had a GIV as a rental car last winter, but I didn't have much time to experiment with it.

However, I also found the air distribution to be very digital.

Furthermore, the Climatronic system failed to register gradual changes in the outside temperature, and consequently, the inside temperature, which can occur depending on the current altitude. A slight increase of just 1 degree in the desired temperature would trigger it to start readjusting. Then lower the temperature again...

However, it seems that some values can be reprogrammed. According to what I've read, you can change the values in diagnostic mode, but these changes are lost as soon as the ignition is turned off. However, this function would be useful for initially determining the individual air distribution. I've found some more information here for the final programming. Let's see if this works.

"To permanently store data:
• Permanent storage (even after turning off the ignition) is enabled by writing "1" to EEPROM cell 119 using a VAG diagnostic tester. (To indicate this, the small dashes mentioned above will alternate on the LCD.)
• The modified offset data (channel 1...x) can now be permanently saved in channel 0 by pressing and holding the "FAN+" button for more than 2 seconds.
• As a storage confirmation, one or two leading zeros will briefly appear on the LCD before the number of modified channels.
• Without active saving in channel 0, modified data will be automatically erased after turning off the ignition, just like in operation without permanent storage enabled."
Delete data: one channel • Offset data for the corresponding channel. Set the channel values to 0 using the FAN buttons.
"All channels • Set to Channel-0 (Content = number of channels adjusted) and press the "FAN-" button for 2 seconds. (The content will change to zero => all data will be erased)."
Name: Channel Allocation
Channel offset size dimension.
0 Number of channels not equal to 0 (digital).
1. Desired blowing temperature. Dig. (3 Dig. = 1 °K)
2 forced-air blowers. Dig. (1 Dig. = 0.055 V)
3 Setpoint temperature valve, digital.
4 Desired Central Valve, Digital.
5 Required feet / Deflection flap, digital.
6. Desired back pressure / bypass valve (only for back pressure air). Digital.
7. Desired evaporator temperature = function of outdoor temperature. Digital display (3 digits = 1 °K).
8. Desired evaporator temperature = function of exhaust air temperature. Digital display (3 digits = 1 °K).
9 BI_LEV-End = Fixed value, digital.

@wutz:

It looks good. Did you find any more information on whether this applies specifically to Hella products, for example?

@Roger

Unfortunately, not. However, the entire article (introduction to on-board diagnostics) focuses on the Hella system. But I can't confirm whether that applies to the programming. Here's the additional information for the temporary change (until the ignition is switched off). I'm just hoping I don't cause any damage by trying this.
Okay, all information is provided without guarantee.

The characteristic curve offset mode is activated by simultaneously pressing the "ECON" and "SW-" and "FAN+" buttons (with the CIDOS system activated, only "ECON" and "FAN+" need to be pressed).
• The mode is indicated by two small dashes placed after the channel and content indicators.
• Channel selection (target temperature display) is done using the "SW+/-" buttons, and content selection (outdoor temperature display) is done using the "FAN+/-" buttons.
• Pressing the "ECON" button will turn the mode off again.
Using data (without VAG test approval):
• The modified offset data (channel 1...x) are immediately taken into account by the software function through parallel shifting of the corresponding characteristic curve.
• The data that is set will remain even after you exit this mode and will only be automatically deleted after the ignition is turned off.
• Channel 0 displays the number of channels that have been modified (channels that are not equal to 0).

What were the corresponding build years for the different software versions?

Best regards, WarLord.

@ WarLord
Unfortunately, I don't know.

I just read the error memory using VAG-Com: no error codes found.
I then logged some values to see what happens.
However, I haven't exactly become a genius.
The values for "air flow to footwell," "air flow to defroster," and "air flow to panel" have not changed.
Only the values for "measured value" and "specified value" have changed. The values went down when the windshield button was pressed.
The test conditions were: ignition on, Climatronic set to "Auto" mode, and the windshield defrost button pressed. Blocks 2, 3, and 4 were logged.
I would still like to increase the airflow, both in the car and in the economy mode. Alter the air distribution.
Does anyone have a helpful suggestion?