Alfa 164 Probleme mit der Klimabedieneinheit

[MALFAROMEO]

Guten Abend Zusammen,

Ich bin neu hier und habe mich auch schon in der anderen Rubrik eben Vorgestellt

da ich mein 164 als Alltags Auto fahre, kommen Natürlich auch zwischendurch mal Probleme und kleine Zicken, aber wer kennt das nicht von seiner Lieben Bella.

Seit ich das Auto Besitze (fast 2 Jahre ) hab ich das Problem das meine Klimakonsole Spinnt, Sprich wenn ich im Leerlauf bin dann reagieren die Knöpfe nicht mehr. es ist aber Strom da, also die Beleuchtung funktioniert und die kleinen LEDs Blinken anstatt zu Leuchten.
Bin ich beispielsweise am fahren und habe Verbraucher wie Nebelscheinwerfer oder Heckscheibenheizung an, schalten sich diese von selbst aus sobald das Auto zum stehen kommt, zum Beispiel an einer Ampel, des Öfteren macht das Gebläse auch was es will, mal mehr mal weniger, sobald ich von der Ampel wieder los fahre, oder im Stand etwas Gas gebe, hört die Konsole auf zu blinken, Leuchtet wieder dauerhaft und Reagiert wieder. dieses Problem ist sehr Nervig wenn man mit Nebelscheinwerfern oder Heckscheibenheizung fährt und diese in der Stadt an jeder Ampel aus geht, Oder wenn es kalt und ist und Jeder Ampel das Gebläse keine Warme Luft mehr Liefert.

ich habe irgendwo schon mal gelesen das andere 164 Fahrer auch schon mal dieses Problem hatten, aber leider nirgendwo Jemanden der das Problem beheben konnte, vielleicht hat ja hier jemand eine Idee oder hatte dieses Problem auch schon mal.

Die Bedieneinheit selbst habe ich schon ausgetauscht.

PS: es ist die Vorfacelift Konsole.

Vielen Dank und Viele Grüße Mathieu

[Alfan]

If I understand it correctly (please supply English text when writing here, so google translate does not have to be done by others separately), you have changed the unit, but having the exact same problems, both with lights, fans etc?

As this is a pre-FL 164, I don't have experience with this unit, but since the problem only happens when idling (?), there must be a power supply issue. I would inspect the different plugs closely and also go through the different fuses, as corrosion might be a problem. Does it happen when you only have the fan on? Having rear window heating and other things running, draw a lot of power and idling and maybe the generator or the cabling cannot supply all the power needed.

Since so many different things are failing at idle, it should be possible to narrow down the electrical area to look at, but I would look at or close to the generator.

Please let us know what you find

[MALFAROMEO]

Exactly right, I have already completely changed the control unit itself, the problem persists.

If the engine fan comes on at 90 degrees Celsius from the cooling water, the center console naturally no longer reacts either.

Yes exactly, unfortunately my problem is that I don't know where to start measuring.

As soon as I press the gas pedal lightly, it only needs to be 100 revolutions more idle speed and everything works. Is there a way to slightly increase the idle speed? I have already turned the screw on the throttle valve a little, then the throttle valve is a little more open and the engine revs slightly higher, unfortunately the potentiometer for the fuel cut-off then no longer reacts, as soon as it reacts electrically, the speed goes back to 900 revolutions. Is there another way to increase idle?

Greetings Mathieu

[MALFAROMEO]

Good evening,

Also to keep you up to date, someone here should follow the topic.

So I've been trying around a bit the last few days, I had pulled off the ABS sensors to see the error gets better when the speed signal is disconnected, i.e. all 4 ABS sensors are disconnected, the speedometer still works, so I continued researching, then got out There is a sensor on the gearbox that is responsible for the KM/H display. Removed this 2-pin connector, lo and behold, the air conditioning unit suddenly works without dropouts.. The volt display has not changed, but even if the voltage according to the display drops towards 12 volts when stationary, the center console remains on, a dream . Now, of course, I just have to figure out how the whole thing is related.

Stay tuned.

Kind regards Mathieu

[Alfan]

That is a good find! Thanks for updating this thread

It seems that there is a short somewhere, so looking carefully at the electrical diagrams I think would be the next step.

[MALFAROMEO]

I drove the whole time last week with the speed sensor disconnected, had no kmh value either, but the climate console worked wonderfully.

So today I tried again, first connected a replacement speedometer or complete instrument cluster, and of course connected the sensor for kmh again. drove a lap, and promptly at the traffic light all consumers went out again. Original speedometer installed again.

Since there is no difference when the speedometer is replaced, it can only be the kmh sensor itself or the cable connection.

I simply clamped a long cable to the front of the kmh sensor and then clamped it to the speedometer in the interior, where the same cable colors go from the sensor to the speedometer. drove another lap and the problem persists, so I would say it can only be the sensor itself, which is screwed into the gearbox and transmits the signal from the gearbox to the speedometer. I'll see if I can get such a sensor somewhere and will of course report back.

Kind regards Mathieu

[Alfan]

That is a good way to narrow down where the problem is

Those sensors are not easy to find, but I believe they have been used in other Fiat and Lancia models.