Dual-zone digital air conditioning faults

[Davidoq]

Hello everyone, my 2001 A208 EVO has a dual-zone digital climate control system that has the following malfunctions:

At the 3rd/4th speed, it adjusts the airflow intensity by one notch at will, and as it does so, the dashboard lights dim and brighten at the same rate.
If I set it to minimum or maximum, the speed remains constant.

For some time now, when I turn off the car, the cabin fan won't turn off, and I have to try different adjustment combinations, reinserting the key and turning it until it starts again and then turning the engine off. I set it to OFF, for example, and try many other random combinations, and finally it turns off.

Does anyone have any idea what happened?

Thanks

[V8CLK430]

"Does anyone have any idea what happened" ?

.

At first watch this:

https://www.youtube.com/watch?v=anNnhZnBuHg

https://www.youtube.com/watch?v=Yts_rOYuR4Y

.

01 Innentemp-Sensor

02 Aussentemperatur-Sensor

03 Temperatur des linken Wärmeaustauscher-Sensors

04 Temp. des rechten Wärmeaustauscher-Sensor

05 Verdampfer-Sensor

06 Kühlwassertemperatur

07 Kühlungsdruck in bar

08 Kühltemp.sensor (23*9 = 23.9deg C)

09

10 Gebläsesteuerspannung !!!

11 Emission-Sensor (B31) z.B. 3.1 = 31.v

12 Sonnestandssensor 4.2 = 4.2v

20 Zusatzkühlventilatorsteuerung 6.1 = 6.1A (max 10A)

21 Motordrehzahl 1/min*1000

22 Fzg-Geschwindigkeit km/h

23 Stromkreis 58d z.B. 99 = 99% von Batteriespannung,

24 BATTERIE-SPANNUNG z.B. 12.5 = 12.5v

40 Steuermodul-Version Software-Version

41 Steuermodul-Version Menü-Hardware-Version

42 Steuermodul VarantenCode 1. Zahl

43 Steuermodul VarantenCode 2. Zahl

English:

01 Indoor temperature sensor

02 Outdoor temperature sensor

03 Left heat exchanger sensor temperature

04 Right heat exchanger sensor temperature

05 Evaporator sensor

06 Cooling water temperature

07 Cooling pressure in bar

08 Cooling temperature sensor (23*9 = 23.9°C)

09

10 Fan control voltage !!!

11 Emissions sensor (B31) e.g., 3.1 = 31.v

12 Sun position sensor 4.2 = 4.2v

20 Auxiliary cooling fan control 6.1 = 6.1A (max. 10A)

21 Engine speed 1/min*1000

22 Vehicle speed km/h

23 Circuit 58d e.g., 99 = 99% of battery voltage,

24 BATTERY VOLTAGE e.g., 12.5 = 12.5v

40 Control module version: Software version

41 Control module version: Menu hardware version

42 Control module variant code, 1st number

43 Control module variant code, 2nd number

.

It is also recommended to read out

the fault memory with Stardiagnosis and report it here...

.

.

best of luck, mike.

[Davidoq]

Where is the relay that cuts off the power to the cabin fan?

Thanks