Suzuki Swift 1.3 DDiS, 2008 "the climate is not working ..."

forehead

Patient:
Suzuki Swift, year 2008, 1.3 ddis 75km engine (Fiat unit, also fitted in Opel).
Manual air conditioning controlled by the 0/1 A / C button.
Cart imported from DK, I will not determine the history of this case, there is nothing on the subject at first glance (I don't know Danish ).

Problem:
The A / C button has no effect on the temperature of the grilles ...
Ok, so the climate doesn't work.
At first, it turns out that the electromagnet in the compressor clutch is broken, the clutch has been replaced.
Then, it turns out that still no cool air is flowing from the air vents, so a visit to the air conditioning service plant (Klima-Car in Mysiadle near Warsaw). Diagnosis - low system pressure, tight system, fan not turning on. The effect, setting the gas to the correct pressure and checking the temperature when the system is turned on (fan replaced by cooling with cooling water), verdict - after removing the electrical problem with not turning on the fan, the air conditioning will be cooling. Suggestion to go to an electrician.
COOL

Then a short vacation, and after the vacation I work again with Swift. Test whether the radiator fan will turn on after the engine warms up (functional sensor of liquid temperature?) - effect - the fan works, lowers the temperature, turns off and continues to loop in accordance with temperature fluctuations. During this test, it released gas with the tester (green) through the valve on the compressor (WTF I think ... I didn't switch on the air conditioner).
One more visit to Klima-Car and checking the pressure quickly, there is 5 bar (ok) in the system - the compressor safety valve has tripped. Why was the climate going on despite the A / C button off? It turns out that the compressor clutch is coupled with ignition.
Thus, a visit to the electrician is getting closer (not only the fan not turning on but also the compressor clutch briefly after ignition for repair)

Car led to an electrician who stated the following:
- the cable pulled after ignition briefly started the air conditioning compressor bypassing the A / C button, unfortunately it turned on the compressor itself.
The electrician brought this modification to its factory condition (i.e. eliminated it).

To sum up, the ignition was on and the engine was working with the clutch running the compressor. In the absence of air flow through the radiator (work at standstill / traffic jam, without the fan turned on), the pressure increasing in the system was dropped by the safety valve on the compressor (luckily, it even worked and did not explode other elements of the system).
Hence the low pressure during the first visit and diagnosis at Klima-Car (interestingly, the system did not burst the system for a short time - only the compressor clutch solenoid was consumed).

The electrician checked the installation to the computer (GM 55563974, on the MJD 6O2.Y6 board) and read the parameters of the system (of course, through diagnostics, there were no errors from the air conditioning system group).
Well, the computer "sees" the request to start the air conditioning from the button, correctly responds to the ON / OFF button A / C.
The pressure sensor in the air conditioning system also supplies its parameter (voltage) to the computer (currently ~ 1.1-1.2V)
The computer does not convert this voltage into bar pressure.
Therefore, it does not turn on the compressor and fan.

An attempt to manually supply a different voltage to a computer (simulating a different system pressure, 2V, 4V, 5V) remains completely unnoticed ...

The situation is illustrated by the following pictures.








And now the questions ... what else to look for and what to check in the system, what attachment point is left to activate this system on the factory beam? ...

The computer visited GMS (global moto service sc) to check for possible burned paths. Unfortunately, he could not be diagnosed by Piotr Okoni on the table without passing through the OBD of the car (connecting to the diagnostic system), and verified the passage in the system, excluding computer defect under the electronic account.

Questions ...
Does anyone have knowledge, or does this type of computer have any air conditioning sewn in ?? (car downloaded from DK quite recently, seeing patents with cables, various ideas come to mind, what Danes used to say) ...
Is there any other element in this system whose parameter is related to turning on the air conditioning, i.e. something else I should check / exclude ??

I do not see the way out of the current situation, if we do not come up with anything together, the last solution will be to generate our own electric beam based on a pressure sensor, e.g. http://www.inter-instal.com/produkt/6000004-presostat-czujnik- air-conditioning-pressure-hp-and-mp-and-lp-male-external-4-pins and A / C button in the cabin, but this is the final resort that I would like to avoid even more because I don't know if any universal fit sensor for swift pipe thread.

The guys from Klima-Car spread their hands, the electrics do not fuse, the electrician also folded after bringing the beam to the factory (suggesting a damaged or even without operating a klima computer). Piotr from GMS can't help too much anymore.
In this case, I don't see the sense of going to an ASO, once because of the costs and two from experience of how an ASO works and approach "unusual" cases.

Any idea?
I will be obliged for any suggestions, hints, oh - fuses in working order


Pozdr.
Michael

No one has any sensible idea how to get out of this annoying defect?
Is all that is left is to make a "new" alternative bundle ...?

Bieda z nędzą wrote:

You can see everything there, the demand for air conditioning is, but there is no approval. And there is no approval because the low pressure of the medium is seen.

OK, so what is responsible for seeing too low pressure?
A computer that does not convert voltage from a pressure sensor, is it a task of some separate element?
Play with voltage (in the range of 1-5V) on the cable from the pressure sensor to the computer does not have the effect of changing pressure.
The question in the first post of this thread is directed at the reason for seeing 0.00bar in the system.
How to artificially increase this pressure to test the activation of the compressor relay and the fan?

Bieda z nędzą wrote:

jimorrison wrote:

OK, so what is responsible for seeing too low pressure?

You make balls, don't you?

No, not at all.
As if I knew what the cause was, I wasn't looking for a solution on the electrode.

Therefore? What is responsible for converting the voltage from the air conditioning pressure sensor to the actual pressure measured in bar?
If this is a computer (previously mentioned - GM 55563974, on the MJD 6O2.Y6 board) please tell me where to look for the fault inside. As I mentioned above, he was on the table in GMS and the passage of this system has been checked - it is.

What is the voltage at the connected sensor and what at the disconnected?
You connect this car to a universal tester.
Maybe this value given in bars does not exist and this is the value shown only by this tester.
Drive to the service, ask what engine driver it should be there, you can also connect to their computer and let them see if they see the same pressure, different or maybe only the voltage.
At about 5V, the second fan should turn on to release pressure in the system.

grala1 wrote:

What is the voltage at the connected sensor and what at the disconnected?

Connected sensor ~ 1.1V (as in the pictures above, the pressure in the system during tests 5bar, on a pressure gauge and not read from the diagnosis), ankle disconnected from the sensor, the parameter is reset.

grala1 wrote:

You connect this car to a universal tester.
Maybe this value given in bars does not exist and this is the value shown only by this tester.

Yes, the tester is universal, I cannot provide a specific type. You can see the interface in the pictures - maybe someone will know what kind of soft it is.

grala1 wrote:

Drive to the service, ask what engine driver it should be there, you can also connect to their computer and let them see if they see the same pressure, different or maybe only the voltage.

This option was honestly rejected, doubting the substantive help of someone from the ASO due to the complex case: / one thing is certain, thinning the wallet strongly

grala1 wrote:

At about 5V, the second fan should turn on to release pressure in the system.

Artificially given 2, 4, 5V simulating voltage changes generated by the pressure sensor on the installation cube. No effect except a change in voltage in the diagnostic interface on a laptop connected to the car. The fan and compressor remained off.

Bieda z nędzą wrote:

Sensors come in two types, if we are talking about three-pin. One generates an analog signal, i.e. pressure / voltage. The second works by impulse, i.e. pressure / filling the waveform.

The sensor is 3-pin, made in mexico (hehe ...) unfortunately I can't read any symbol from it.
I am adding illustrative photos showing the sensor.
IMG_201708...161212.jpg (1.43 MB)You must be logged in to download this attachment. IMG_201708...161220.jpg (1.43 MB)You must be logged in to download this attachment. IMG_201708...161231.jpg (1.63 MB)You must be logged in to download this attachment.

Edit - symbol read - ordinary common GM sensor
9131721

How did you give these 2, 4, 5V exactly what you saw in the readings?

grala1 wrote:

How did you give these 2, 4, 5V exactly what you saw in the readings?

It was like that.
Photo for 5v in the first post.

I drove today to Aso Suzuki (al. Krakowska w WWie), diagnosis / repair 250-500 depending on what the computer shows (not a swift, only on the way to reconnaissance).
- The computer will not show anything because it does not spill errors in the area of air conditioning
-You have to check it all the more.

Advice on whether this computer is from the version with air conditioning will not provide.

Can there still be any element in the system besides the engine controller that has not yet been checked?

I think not. The pressure signal to the controller comes. He sees the request to turn on the air conditioning but does not turn it on.
I was out of ideas.
Maybe some temperature doesn't suit him.

Do you see that it was read by KTSem so it can be that the controller only sees the voltage and does not convert it to bars and therefore KTS gives 0 because there is no conversion from voltage to bars.
I wrote about it earlier and also wrote to read it with something dedicated, it would not turn out that in fact the pressure is 0bar and a completely different sensor is simulated and the KTS has incorrect descriptions.

Bieda z nędzą wrote:

Photo 1, medium pressure 0 bar. No controller will start the compressor.

I will come back with a question from the first post.
Should the computer convert the voltage (which it receives from the sensor) to pressure (say 5bar) or is it a task for another system?

Poverty with misery, can you give something more about the type of sensor after the GM number below? You wrote about two types before. Is there any sense to buy another sensor if giving 5V artificial voltage did not bring the expected effect?

grala1, I have already run out of ideas

Bieda z nędzą wrote:

Either the engine control unit or the air conditioning panel. Look at the diagram. But here rather the engine driver.

If these two are the first, the panel is only the A / C (manual) button.

forehead
Refreshing the thread, but without a breakthrough

Namely, the ASO computer shows analogous readings as above KTS (pictures).
Any ASO suspected is a pressure sensor and expansion valve.
However, the amounts that were proposed for the (original) parts were prohibitive enough that I took the car.
The more that there was no guarantee of removing the defect after the installation of new ones, only eliminating these elements from the system.
Unfortunately, it is not known whether this computer supports the climate (previous suspicions from the thread - is it a computer from this car) because they do not have such data.
By the way, on the page: japancars.ru/suzuki/ I verified after Vin that the climate in the cart was factory
And yes