Air Conditioning Not Turning On After Battery Replacement: Peugeot 508 (2013) 1.6THP Gasoline

Question

Hello, the problem is that the air conditioning is not working. This problem appeared after replacing the battery (maybe a coincidence). After turning on the air conditioning from the button, the air conditioning does not turn on at all, the airflow in the cabin responds, the button lights up....

Anonymous · Answer

Disconnect the electromagnet power plug in the compressor, turn on the air conditioning and check with a meter whether there is voltage there. We will check whether it is the fault of the electrics, or, for example, the clutch has worn out / misaligned.

Anonymous · Answer

And did you take into account that there is a pressure regulator there ??

jack63 · Answer

What is this regulator and how does it affect the operation of the compressor compressor?

Anonymous · Answer

In some systems there is a downstream pressure sensor and / or an evaporator temperature sensor. I didn't have to take them into account, because assuming that they are functional when the installation is not working, both should conduct. If they are conductive, there is voltage across the coil, so something is wrong with the coil / clutch. If they do not conduct, it means that there is a problem in the installation and you need to find out what fell.

Anonymous · Answer

But I'm talking about a pressure control valve, for example the Sanden sd6c12 compressor not only has an electromechanical clutch, but also a pressure relief valve. The more so because he wrote

Kris1975kris · Answer

The air-conditioning was working until the end, i.e. before the battery was replaced. I did not check it immediately after the exchange because I did not think that something could be wrong with 2 or 3 times and it cooled well as if nothing had happened. The gas pressure is checked OK.
I checked the voltage on the plug in two ways:
1. I connected both test leads from the meter to the plug - no voltage
2. I connected one wire from the meter to the plug and the other negative to the battery and I did the same with the second pin in the plug - no voltage.

Anonymous · Answer

Did you check it with the air conditioning (switch) on and the engine running?

Kris1975kris · Answer

That's how I started the ignition and then turned on the air conditioning and zero voltage ...

Anonymous · Answer

You don't have to turn on the ignition, just start the engine. Hell, anyone would be wasting electricity on powering the compressor coil when the engine is not running.

Kris1975kris · Answer

Sorry, I said it wrong, I turned on the engine, I turned on the climate and zero voltage

Anonymous · Answer

Below is a piece of the car's wiring diagram.

S167 is a fluid pressure sensor. Check if it works properly.
Also check if the radiator fan relay is dead - it is possible that it is not working properly, the whole thing is heating up, the pressure in the air conditioning system is increasing and the sensor disconnects the compressor.

Kris1975kris · Answer

I will note that the radiator fan turns on at high temperature, that is, it works probably correctly, you can deduce

Added after 4 [minutes]:

How to check the fluid pressure sensor and where is it located and where can I find the fan relay?

Anonymous · Answer

Let's say that if it sometimes does not work and sometimes it works, let's assume that the fan and the relay controlling it are ok. Engine does not overheat? Does his temperature jump strangely? Anything that would indicate a faulty thermostat? Check this sensor. Alternatively, go to the logic, check which wire in the electromagnet power plug is ground, then go after the latter and look for where your voltage disappears (or more precisely - at which point there is still voltage).

Kris1975kris · Answer

The temperature does not jump and the engine does not overheat. It reaches, say, 90 degrees and the fan turns on

Anonymous · Answer

When you find a compressor, there are 2 hoses from it. One for the condenser, the other for the evaporator (radiator at the front of the car and heat sink inside the cabin). Have you found? Then forget about them, there is a third tube that connects the condenser to the evaporator directly. You have a sensor on it somewhere. There are 3 wires sticking out of it.

Kris1975kris · Answer

Ok, how to check this sensor?

Anonymous · Answer

It has 3 wires. One is power, the second is ground, the third is signal. Check the tension on them in relation to the mass (body).
Have you checked the fuses yet? I would suggest taking them out one by one and checking if any is burnt. You can see it with the naked eye.

Kris1975kris · Answer

Ok, I'll check this sensor tomorrow. As for the fuses, I checked those who had access, i.e. those under the hood. Because those who are in the middle on the left side of the steering wheel and those in the glove compartment are not because the access is so h ... that half of the car must probably be dismantled.
And by the way, it probably can't be a fuse, because if the fuse blows, something doesn't work and that's the end, and my air conditioning has worked a few times and now I don't want to get into work at all.
From the observation, I also noticed that when I turn on the air switch from the button, the key lights up (the climate does not cool down, of course) but the airflow in the car changes, i.e. it is sometimes bigger and sometimes smaller as if it wanted to regulate the temperature inside the car.

andrzej20001 · Answer

After all, you can see everything in the parameters of the controller, pressure, states, etc.

Kris1975kris · Answer

It has 3 wires. One is power, the second is ground, the third is for signal. Check the tension on them in relation to the mass (body). I checked the 5V sensor is coming

Anonymous · Answer

It's power. You should have something in the region of 1-2V on the signal cable. Check if there is

Kris1975kris · Answer

Curiosity ... today it suddenly broke up. The second and third time I turned it off and it was OK. One time I turned it on and it doesn't want to turn on again ???
I do not know if this is a coincidence, but it turned on right after the refrigerant pressure measurement clocks in the installation were disconnected.
I was to check the pressure of the factor, it came out OK.

Added after 2 [minutes]:

It's power. You should have something in the region of 1-2V on the signal cable. Check if there is
Only one wire was the voltage mentioned 5V

Anonymous · Answer

But you are to check the correct operation of the sensor, not the correct system pressure. Possibly the meter in the paw and fly one by one where the tension disappears.

Kris1975kris · Answer

So on one of the wires of this sensor there was 5V on the other two 0

Anonymous · Answer

If the system is full, one pin should be around 1V, in fact anything between 0.5-1.5V would be correct. In my opinion, the sensor is broken. I can help so much over the Internet, the sensor costs PLN 60, so I think that even if the diagnosis is incorrect, the amount of money will not be a big loss. However, if you have any doubts, I suggest finding which relay is responsible for switching on the compressor (unfortunately I did not find it in the list, you would have to disconnect the battery and check the transition between the coil power cable and the pins in the relay box with a multimeter) and check if there is voltage to it and if the coil is powered, generally check that he is not dead.

Kris1975kris · Answer

Ok, I understand it so I'll try to do it. But I do not know where to look for this relay or under the hood or where it is inside, I have not found such information anywhere on the net (whether it is soldered on a PCB or is plugged in like a fuse) I do not know where to look for it ?

Anonymous · Answer

It is not in any mailbox, at least it is not in the list, it has to be integrated in some module. Well, to find it, check where the clutch power cables go

But I doubt it's him. The sensor shows ... in principle, it is not known what because even at zero pressure there should be a small voltage at the output. Since you have checked the pressure in the installation, the sensor is not working properly.

Kris1975kris · Answer

I understand that in order to replace the sensor, you need to release the factor?

Anonymous · Answer

If you quickly unscrew the sensor, there is a small valve that will block the flow of the refrigerant. Unless this valve is damaged, then quickly screw in a new sensor, although some refrigerant will probably escape.

[Solved] Air Conditioning Not Turning On After Battery Replacement: Peugeot 508 (2013) 1.6THP Gasoline

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