L322 No air conditioning button works

Hello everyone, first sorry for my bad English, I am writing from France.
I am writing to you because I am drying up on my problem on my range l322 sc which I love.
After buying the range qq months ago, when the air conditioning is on, the air conditioning shutter noise at times. Then recently more shutter noise and more heating than cold. I begin to look for a solution by the fuses. Control of air conditioning fuses, all is ok. I turn the car back on and the more air conditioning, nothing, no buttons on the control panel work. I plug the suitcase which tells me no communication with the rear air conditioning control panel and k bus disabled. Erasing errors still nothing, I tell myself something must have burned out. So change the rear control panel then front and air conditioning module, but nothing works ... Tj no air conditioning, if someone has an idea for me? Can air conditioning be electronically disabled? And if so, how can it be reactivated?
Thank you in advance for your answers.

Dravas said:

Hello everyone, first sorry for my bad English, I am writing from France.
I am writing to you because I am drying up on my problem on my range l322 sc which I love.
After buying the range qq months ago, when the air conditioning is on, the air conditioning shutter noise at times. Then recently more shutter noise and more heating than cold. I begin to look for a solution by the fuses. Control of air conditioning fuses, all is ok. I turn the car back on and the more air conditioning, nothing, no buttons on the control panel work. I plug the suitcase which tells me no communication with the rear air conditioning control panel and k bus disabled. Erasing errors still nothing, I tell myself something must have burned out. So change the rear control panel then front and air conditioning module, but nothing works ... Tj no air conditioning, if someone has an idea for me? Can air conditioning be electronically disabled? And if so, how can it be reactivated?
Thank you in advance for your answers.

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Question for @Datatek or Mark.our Frence speaking members.

Id double check the fuses you did if it was okay til then.

First place to look on an L322 is for water/humidity behind the trim in the left side if the boot. Because the crazy electronics are all interlinked the fault may not be where it appears to be.

Thank you for your answers.
Details, when I put back the air conditioning fuses, the ATC fan starts up, and the air conditioning flaps initialize.
Besides, my auxiliary heating works, when I turn on the ATC turns on partly and I can increase the speed of the blower and the ventilation zones.
Regarding the message SDD sends back to me, he tells me that the K-bus is deactivated and offers me a 3-step diagnosis. He makes me control the rear control module and another element which he calls the catalyst temperature sensor. Only I cannot diagnose it because I do not know what it is. It has a C0676 connector.
The detail of the DTC on SDD also tells me that the passenger enclosure temperature is 215 ° C. The problem may be there, and the catalyst temperature sensor?

What year are we talking about ? The passenger enclosure temperature sensor is next to the clock low down on center consul behind a grill that could be giving wrong readings and the only catalyst temperature sensor I can think of would be on engine exhaust.

It is a range of 2008 in v8 sc.
For the passenger speaker sensor on the ATC, I exchanged with another to test and the problem is still there.

As it is a 4 zone air conditioning with rear modules. Does this module have a temperature sensor which could be the cause of the bug? Finally I find it hard to understand how a fuse check failed everything, while tt worked before ...

Que?

RangeRoller dt said:

Que?

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Sorry the translation was not done. I modified.

Dravas said:

I find it hard to understand how a fuse check failed everything, while tt worked before ...

Click to expand...

There may be corrosion and something disturbed or loose. The idea being if it was okay before something changed

I noticed that I had water in the trunk (spare tire) and that the trunk mat was wet. Maybe a start to the solution?
on the other hand I cannot know by where passes the water. Is the tailgate seal deemed weak?

There is a seal on the boot(s) that is known to let water in. There are electrical bits in boot that will suffer from the moisture

Good morning all,
Finally solution found for my air conditioning, and it was a very silly problem as often. When checking my air conditioning fuses, it turns out that one was placed in the wrong place, a stupid lack of intention, which made me look for a long time.
Now I meet a new problem that I can't solve (it never stops).
Some time ago, following a problem with the injector peeing, I had to change the probe and catalyst on the left side (bank 2).
I changed the 4 lambdas while I was doing it. Only since that, I always have fault codes on lambdas bank 2.
I exchanged the O2 bank 2 with the old bank 1 which worked, to see if it was the new probe the fault. Once on bank 2 it does not work too.
Basically looking at the suitcase range, the O2 probe works a little at the beginning we see it going towards 0.2-0.3V, while on the other side it is at 0.6-0.7V. Then after a few minutes it drops to 0V and does not move. The car therefore enriched thoroughly on bank2 and message dashboard.
After that visual check of the connections, of the motor fuses for the probes, I even tried to follow the cable in the motor to see if damaged or other, but nothing speaking.
In short I suspect that the problem does not come from lambdas bank 2, because both (pre and post catalytic) are the same concern. It seems that once the probes, or cable, or connector heats up a little, the current does not pass anymore ...
If someone has a solution, I think I will not get out of this range ^^