Hello.
The car is a golf mk4 from 1999, 1.9 tdi alh engine.
3 pin pressure switch, version with climatronic.
The compressor does not turn on at all.
After the diagnosis from the panel level, there were two errors: 510 and 318, the radiator at the bottom was damaged, changed to a new one, tightness checked, loaded and this matter is ok, error 318 disappeared but still nothing. I started looking for topics, I connected the vaga in the meantime, there were no errors, there was a g191 sensor error on the engine turned off, the car is silent, the error is silent.
I checked the fans, there is no power supply on their plugs, the controller has been replaced, although a new replacement but something else, there is still no electricity, as for the fans themselves, in the diagnostic test from the panel level the fans go both at 1st speed, tests of outputs in the vag or in the air conditioning group, or in this case the counter, the fans go 1st and 2nd gear, respectively.
After briefly applying 12v to the compressor, the clutch clicks and goes, in the compressor plug on the old controller, the voltage was 4v with minor, on this new replacement it is 0.
The pressure switch has a mass and + 12v.
In the plug that comes to the controller, the one with the pluses, is it correct that + 12v after turning is only on one thick wire and the thin red one?
Temperature sensors checked in vagu and they are ok, be it air or coolant.
So much with my knowledge and ideas proven, can anything else check?
The fact that the second driver, theoretically new, is out of order, I take into account, but I would prefer to make sure that the 510 error remains, which always occurs, and I have not been able to find its description or anything else anywhere.
I know that a lot of this type of topics, I used many, but so far nothing has worked.
greetings
The car is a golf mk4 from 1999, 1.9 tdi alh engine.
3 pin pressure switch, version with climatronic.
The compressor does not turn on at all.
After the diagnosis from the panel level, there were two errors: 510 and 318, the radiator at the bottom was damaged, changed to a new one, tightness checked, loaded and this matter is ok, error 318 disappeared but still nothing. I started looking for topics, I connected the vaga in the meantime, there were no errors, there was a g191 sensor error on the engine turned off, the car is silent, the error is silent.
I checked the fans, there is no power supply on their plugs, the controller has been replaced, although a new replacement but something else, there is still no electricity, as for the fans themselves, in the diagnostic test from the panel level the fans go both at 1st speed, tests of outputs in the vag or in the air conditioning group, or in this case the counter, the fans go 1st and 2nd gear, respectively.
After briefly applying 12v to the compressor, the clutch clicks and goes, in the compressor plug on the old controller, the voltage was 4v with minor, on this new replacement it is 0.
The pressure switch has a mass and + 12v.
In the plug that comes to the controller, the one with the pluses, is it correct that + 12v after turning is only on one thick wire and the thin red one?
Temperature sensors checked in vagu and they are ok, be it air or coolant.
So much with my knowledge and ideas proven, can anything else check?
The fact that the second driver, theoretically new, is out of order, I take into account, but I would prefer to make sure that the 510 error remains, which always occurs, and I have not been able to find its description or anything else anywhere.
I know that a lot of this type of topics, I used many, but so far nothing has worked.
greetings
