Audi A4 B5 (1.8 LPG) - Unable to Connect to ECU via OBD, Works with Air Conditioning

Question

Welcome to my audi, I can't connect through OBD with the engine. You can connect with air conditioning for it. 1.8 lpg engine. Anyone have an idea what could be? I read that it can be through lpg but how to get around it?

spinacz · Accepted Answer

If you now have a compact green-black with green-red and red from the immo can, does the car start?
If it starts, cut the red that goes from this connection to the immmo can, if the car does not start, then check if you can make a diagnosis.

spinacz · Answer

What equipment do you have The car starts?

golabek008 · Answer

Yes, the car is working. They tried vagem and viakenem. Interfaces are functional because they work in other cars.

andrzej20001 · Answer

Immo off can be done

golabek008 · Answer

So what to do in this situation?

spinacz · Answer

Or maybe an emulator was installed and someone did not connect the diagnostic line.

golabek008 · Answer

And then he would not read everything probably? And it combines with air conditioning and ABS.

spinacz · Answer

No, if there is an emulator it is connected only to the ECU and not to the rest.

adamski123 · Answer

Hello, I used to do a topic with VW and there was an emulator in the immo can and I couldn't connect to the ecu if someone installed the emulator and didn't connect the WI line K lines together there is no ECU diagnostics, but you can check if you have the immo off key wrap in aluminum foil so that only the tip protrudes and start the car when you start it, you do not have immo

golabek008 · Answer

I did not check with the key but the immo box is but only 3 cables come from it. It is also like a torn ankle next to nothing with green cables. So this will be an emulator in the immo box?

adamski123 · Answer

Hi, green cables t line K and W line if they are connected diagnostics, but the car probably won't start

golabek008 · Answer

So you can't do with the emulator and the connected K and W lines so that you can fire and check the errors only without firing?

spinacz · Answer

Connect these K and W, then check if you are talking about the equipment from ecu and the rest of the car. I did not have a knock, what is the case that the emulator blocked the diagnosis come apparently there are those that have this disadvantage. Write what resulted from the combination of K and W, the car should start without a problem.

adamski123 · Answer

You have to see if it can do it, if not put a switch

golabek008 · Answer

I connected the cables but nothing came of it. I noticed that it does not connect with the climate. I will add pictures of these cables because I don't know if it should be like that.

golabek008 · Answer

It follows that black and green combined with red from the can of immo. I closed with green-red but nothing came out. On one of the pictures is also a connection of several cables in which is red and green so I have no idea if it should be?

golabek008 · Answer

I did as you wrote and can be connected. I did it on the switch and it is even possible to read errors on the firing if the switch on the running engine is switched on. Thanks for the help

Audi A4 B5 (1.8 LPG) - Unable to Connect to ECU via OBD, Works with Air Conditioning

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