Can it be diagnosed manually?

30-05-2005, 9:23 Subject: Can it be diagnosed manually?

Hi everyone!

A friend has a manual air conditioning system in his 6/93 Audi 80 1Z Avant. When it's very hot, it doesn't cool at all, but when it's a little cooler, it works correctly. A week ago, it was refilled, but it didn't help.

I have now gone to troubleshoot and saw in the diagram that a K-line leads to the control unit

. However, I would be surprised if it is possible to manually diagnose the climate control, or is that actually the case? At least, VAG-COM hasn't found any fault codes.

Guest Free account, no CAN development support

I'm not very familiar with your car, but I still can't imagine that your manual climate control system is diagnostic-capable.

-Uwe-

30-05-2005, 15:39 Subject: Can it be diagnosed manually?

I don't believe it either. But then, what's the point of a K-cable? Strange...

30-05-2005, 19:24 Subject: Can it be diagnosed manually?

Also, the manual climate control system can also be diagnosed on the Audi 80 (8C).

31-05-2005, 7:17 Subject: Can it be diagnosed manually?

Really? Have you seen it yourself?
I will try again to connect with the VAG-COM...

31-05-2005, 14:13 Subject: Can it be diagnosed manually?

wolfi_b wrote:

Really? Have you seen it yourself?

Yes, but not just error codes and measurement groups.

05-06-2005, 19:03 Subject: Can it be diagnosed manually?

Okay, it's actually working!

Labelfile available here: http://download.openobd.org/labelfiles/german/4A0-919-579.lbl

And this was in the error log:

Quote:

VAG-COM Version: Release 311.2-N

Control Module Part Number: 4A0 919 579 C
Component and/or Version:
Software Coding:
Work Shop Code:
1 Fault Found:
00532 - Supply Voltage B+
07-00 - Signal to Low

Measurement blocks were also unremarkable.

But I'm just as smart as before. However, it was quite cold today, so the climate control worked perfectly. If it's too hot again, the search continues...

06-06-2005, 19:00 Subject: Can it be diagnosed manually?

Take a look at the shutdown conditions...

07-06-2005, 6:52 Subject: Can it be diagnosed manually?

Yes, of course. But it still needs to heat up again, and the Audi also needs to be in the country...

07-06-2005, 11:56 Subject: Can it be diagnosed manually?

wolfi_b wrote:

Yes, of course. But it still needs to heat up again, and the Audi also needs to be in the country...

Otherwise, this feature should also support sequential actuator diagnosis, which may be helpful.

07-06-2005, 14:00 Subject: Can it be diagnosed manually?

Hmm..
If I examine the label file, in the first field of the MWB1, I can find the bits representing the shutdown conditions. When I looked at the block, it only had 0.0 on it.
In the label file, it states "requires VAG-COM 402.3 or higher", but I only have 311.2.
Could it be due to this?

07-06-2005, 16:32 Subject: Can it be diagnosed manually?

Take a close look, there it says: Target Value: 0 = Not switched off .

09-08-2005, 20:19 Subject: Can it be diagnosed manually?

Hi everyone!
I had the aforementioned vehicle in my hands again today.
So sieht der MWB 1 aus, wenn das Klimagerät nicht funktioniert:

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19-08-2005, 4:09 Subject: Can it be diagnosed manually?

2.0 = 2 = Power outage

Okay, let's start by checking the power supply and the climate control system, starting with a weak battery.