Audi 80 2.0 abk Klima wiring harness after upgrade

    • Neu

    Hello everyone, my name is Lucian and I live in North Italy. The last autumn I started to install a AC system on my 2.0 ABK '94 Audi 89 cabrio.

    To be short, I have one last wire which I cannot understand where is going. On the wiring diagram it goes on the "ELECTRONIC THERMO SWITCH", but I cannot understand what is that. That wore is passing through the 5 pin red connector, and is arrive in the F14/G2 .....sensor/switch/....or what that means.

    The AC sistem is working, the air is cold, the compressor is turning off when the pressure is too high... everything seems to be fine.

    But I know that I left that wire "BLUE/WHITE" free and this is not normal.

    I think that his function is to turn off the compressor when the 2 velocity off the fan is active (too keep the idle off the engine when the power consumption is higher).

    This is only my supposition....

    If anyone can help me with the destination of that wiring, it will be great.

    Thanks all for attention.

    • Neu

    I do not understand everthing.

    I think you are talkting about in german "Hochdruckschalter". This measure the pressure (which is more or less the temperatur of the R134a". If the pressure is over a special level, the ventilator of the radiator move to higher rotation. This mens, more air leads threw the radiator, the R134a is getting cooler.


    If the R134a is too warm, it will not condensate in the condensator (Radiator for R134a).

    More or less, when the Hochdruckschalter is activated, the ventilator has to switch to higher level.

    I hope this helps......


    By the way.

    The V6 needs a bigger generator for the electric.....

    • Neu

    Thank you for answering. Mine is a 2.0abk, so doesn't need a bigger generator for the electric. I want to know where I have to connect that "BLUE/WHITE" wire. It comes from the compressor relay, pass true the red 5 pin connector and goes to.....? I don't know where....

    Maybe someone understands better the diagram and can help.

    Thanks

    • Neu

    Hello Lucian,

    the part you search for is a grey sensor. It is next to the blue coolant water sensor near the cylinder head. The sensor has three connectors, two of them are already connected with your dashboard (water temperature). The third one is for the AC, it stops the AC if the coolant water is too hot.


    Part number: 053 919 501A

    • Neu

    Hello, so I looked at the grey sensor and I sow the blue/yellow wire that you told me, is there 😊. I will make a misure to see if is the same with the blue/yellow from the 5 pin red connector, because at some point, from the red connector, the blue yellow wire is split into 2 wire and goes to..... I don't know where...

    If is the same, is easy to make a bridge. Thanks ,have a nice weekend.

    • Neu

    This has nothing to do with Air Conditioner is only for the temp gauge. The blue/yellow wire goes to the MC and coolants container.

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    Danke 1
    • Neu
    Zitat von Lucian_kel

    I will make a misure to see if is the same with the blue/yellow from the 5 pin red connector, because at some point, from the red connector, the blue yellow wire is split into 2 wire and goes to..... I don't know where...

    If is the same, is easy to make a bridge.

    As Kisugi Ai said, forget the blue-yellow cable from the 5 pin red connector. It is not the same!


    You need to find the 3 pin black connector in your car. The colour of the wire is identical, but it is a different signal. Connect the blue-white wire from the red connector with the blue-yellow wire from the black connector.


    Zitat von Kisugi Ai

    This has nothing to do with Air Conditioner is only for the temp gauge. The blue/yellow wire goes to the MC and coolants container.

    That is not completely correct. The signal is also used to stop the AC if the coolant water level is too low.

    • Neu
    Zitat von -marvin-

    That is not completely correct. The signal is also used to stop the AC if the coolant water level is too low.


    May be on the Elektronik AC but I think on the manual there is nothing to do with.

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    Audi 80 B4 MJ 92 2. Motor
    1. Motor 180Tkm Rip und 210Tkm Rip
    2. Motor angeblich 170Tkm nach Begutachtung der Pleullager Ehr 300Tkm Mal sehen wie lange noch

    • Neu

    Okay Marvin ich werde das mal aus probieren aber ich glaube mit manueller im Abk intesiert das die Klima Anlage nen pups ob das Ding da ist oder nicht. Bei der elektronischen ist das wieder anders da gehet der Heißschalter und mangel Schalter an das Bedienteil.

    Habe nur den slp für die Klimatonic


    Ther are only 3 wires.

    G3 temp gauge G2 temp sensor

    F14 hot switch und F66 coolant level indicator

    • Neu

    Es ist doch oben eindeutig auf dem Schaltplan zu sehen, dass der Schalter für Kühlmittelmangel F66 eine Verbindung zum Steuergerät für Magnetkupplung J153 (welches nur die manuelle Klimaanlage besitzt) hat.


    Aus eigener leidiger Erfahrung kann ich dir sagen, dass wenn der Bottich leer ist, die Klimaanlage abschaltet. Aber probiere es gerne aus :)

    • Neu

    Ähm sieht man auf den Stück Schaltplan schlecht aber gut. Wenn es so ist dann ist das so.

    Habe halt nur den slp von der Automatik.


    Danke.

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    Und ausgeloggt!
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    Audi 80 B4 MJ 92 2. Motor
    1. Motor 180Tkm Rip und 210Tkm Rip
    2. Motor angeblich 170Tkm nach Begutachtung der Pleullager Ehr 300Tkm Mal sehen wie lange noch

    • Neu

    Hello, so I found only one black 3 pin connector with the blue/yellow wire which has continuous circuit with the grey temperature sensore. But that one, I connected with the blue/yellow from the 5 pin red connector. When I dismantle the wiring harness from the donator car, it was like this (the blue/yellow from the 5 pin red connector was common with the blue/yellow which goes to the grey sensor). Unfortunately, I didn't know that the 5 pin red connector wiring harness is so important for the AC wiring. I've cut after the connector, thinking that I have already on my car the second part and it will be plugged into that.

    So, the blue/white wire which I need to know where it goes, it still a enigma...

    I toked the ECU from the donor car, and the only blue/white wire it goes to pin 41 from ECU, which means "throttle position sensor" which with the ignition ON is getting 5V (I checked and it getting 5V). Initially I connected there the blue/white wire, but when is connected it's putting OFF the relay (no + for the compressor).

    • Neu

    Oh no, what a mess :)

    Zitat von Lucian_kel

    Hello, so I found only one black 3 pin connector with the blue/yellow wire which has continuous circuit with the grey temperature sensore. But that one, I connected with the blue/yellow from the 5 pin red connector. When I dismantle the wiring harness from the donator car, it was like this (the blue/yellow from the 5 pin red connector was common with the blue/yellow which goes to the grey sensor).

    The car which you used for the parts was also an 2.0E ABK model year 1994? The wire diagram between different engines is completely different. The decisive factor is the original wiring diagram that matches the engine and model year. Your pictures show (as far I can see) the original wire diagram for ABK model year 1994 and 1995. Ignore the other paintings that are not from Audi.


    At first, I would unplug the wire from the engine ECU. This has nothing to do with AC. All signals go to the "Steuergerät für Magnetkupplung J153" / AC ECU.


    As I said, connect the grey sensor with J153 / AC ECU as shown in your wire diagram. Where do you have issues? :)

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