Garage Cabinets, Garage Storage, and Garage Organization

Hi again!

I have a couple of posts still open on a steering wheel vibration issue and on a engine starting delay, the truth is that budget came short and my a/c quit working, so priorities first.....ok, let's start from the beginning....my a/c system was not working too good and I added a freon can, aproximately .345 grams. it worked great for months but now it happened again! however this time it hapenned on the road and I bought my self the gauges to measure high and low pressures. Although I reached the recommended pressures or amounts, my a/c starte acting weird...

First when I put more freon and check the gauges, it starting cooling great, ( a few minutes ) then all of the sudden if I was driving over 70 miles, it would stop cooling!, I tried then slowing down, but no luck. I would have to shut the a/c off for 5 minutes and then it would work again!...

I figured there had to be a way to check the a/c computer, and erase its codes, so I found out that it had error 232 that stands for refrigerant pressure sensor, well I went got the pressure switch and when I replaced it, ( of course ) the freon escaped, (because I have the gauges, but not a way to store the freon), anyway, I replaced the sensor but I never vacumed the lines, and (I bet this was my mistake) I went ahead and put freon in again, the result?.....

Well although the compressor is on, I do not get any cool air at all, to me it is not even cooling a bit.  I checked again the pressures, and it seems like they are fine, turning on and off, about 280 psi on the high side and 50 on the low one, the funnny thing is that I do not see the compressor going in and out, I just see it on the pressures, I remember it use to disengage and engage periodically, not anymore, it seems like is on all the time. So.....what is next? I checked the climate control codes and it gave me the same refrigerant error again, I keep trying to fix it since today it was 98 degrees and I'm cooking!!!   ...please provide me any advice you can spare...thanks

oh by the way, I read that at certain pressures the auxiliary fan go on, well, they do, at low pressures they go slow and then at high ones they go high too, they even shut down some times, but only for a few seconds....I also read that below certain pressure the compressor just shuts off, and above another one does the same thing....the time I put the freon the first time, I saw that happening , the fans and the compressor would not engaged, and the after the right pressure they did.

I'll keep waiting on You guys' responses...thanks again!!!

the error code 232- refrigerant pressure sensor (B12) voltage supply problem.

first, try to measure the voltage supplied by the push-button control module (N22) going to the B12. you should read around 4.75-5.25 Vdc. this will tell us if the cables and N22 is working just fine.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

i'll try to post the read-out display and it's specified value on your AC display.

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_________________
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i have also experienced this problem before that the condensed water leaks in at evaporator temperature sensor, this temperature value is higher than the operating temperature. before with this experience, the scanner doesn't show any defect in the temperature sensor because the temperature sensor is damaged by the condensed water(it's ohmic resistance). the operating temperature at the evaporator is between +2 to +12 deg centigrade.

the symptom could be that the air conditioning starts running for approximately 10 minutes, then the refrigerant compressor switches off and begins running again for approximately 10 minutes when the ignition is switched off and back on.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

one other reason could be due to refrigerant loss because of leaks.

as for the compressor, you can try to check it by supplying direct 12Vdc to it and see if it kicks or not. if it kicks your compressor is okay. if the AAC control unit reads an abnormal operation of the refrigerant circuit it automatically shuts down the compressor to prevent it from damaging.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

Well, I'll see what the voltage is at the sensor.....is there a fuse related to that sensor?.....also, the compressor works when I turned the a/c on or off, but it seems to me that never stops working.... I read about the other sensor getting moisture from condensation, I'll check that too, now you said...

i'll try to post the read-out display and it's specified value on your AC display.

...I did not get that part, am I supposed to make the a/c display show a voltage in a testing mode?...if so, how do I activate that one in particular?...

One more thing, I have deleted the 232 error several times and keeps coming back, even with a new sensor, like You said it could be the voltage, but, is it the only reason why it would keep showing that error? In other words if it was the temperature sensor getting water ( and not showing a code ), why would it affect the pressure voltage and trigger a 232 error code?

Thanks in advanced..

mechefan wrote:

Well, I'll see what the voltage is at the sensor.....is there a fuse related to that sensor?.....also, the compressor works when I turned the a/c on or off, but it seems to me that never stops working

the voltage comes out from your AC push button control module. no fuse.

is your low pressure line icing? you mentioned it seems the compressor never stops working... if it is, your refrigerant must have been contaminated. you need to replace it but pull-out all refrigerant first.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

mechefan wrote:

i'll try to post the read-out display and it's specified value on your AC display.

...I did not get that part, am I supposed to make the a/c display show a voltage in a testing mode?...if so, how do I activate that one in particular?...

yes, you can display the actual values using the AC display...

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_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

about the fault memory...

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_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

mechefan wrote:

One more thing, I have deleted the 232 error several times and keeps coming back, even with a new sensor, like You said it could be the voltage, but, is it the only reason why it would keep showing that error? In other words if it was the temperature sensor getting water ( and not showing a code ), why would it affect the pressure voltage and trigger a 232 error code?

you cannot always depend on the fault codes. the actual values is the most important thing as long as you know how to read it.

about this 232 error code, it could be numerous reasons why does the AC control unit displays this. it could be the wire, the sensor or worse the control unit itself(not supplying exact voltage or reads a false information coming from the sensor or the AC control unit gives incorrect logical values for it's actuators).

just check all the actual values you get from the AC display and note everything.


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

Ok, I'm back ( like a bad dream )  

I checked the voltage to my sensor and it read 4.9 volts, and then I had my system vacuumed and recharged at the right load (or so they claim). I erased the errors on N22 and the a/c still did not work and the error came back later.

I went ahead and while the car was running and the ac was on, i disconnected the pressure sensor and check the voltages at the plug before plugging it back to the sensor, it read 4.9 from one side to the middle and of course -4.9 when I reversed the leads, that showed me that the middle wire at the plug was negative and the firs side positive, I checked the middle one with the other end, and it showed me 5.0v. ( all these with the sensor unplugged ).

 I have not taken the ac display out yet, to see if the voltages show there, I have to find my stereo keys to remove it. (I will post that later ).

I however, plugged the sensor back and noticed that this time, and only this time the clutch went on and off  a couple of times before staying on all the time...

After that I went inside the car and erase the error again! 232!, waited sometime, restarted the engine, ran the ac for a while and then read the display for the other sensors, this is what the display showed....(I activated the test by setting the temperature to 72 since we use Farenheit )

01-103
02-113
03-107
05-106
06-183
07-21'6 and varying..24'7, 24'6, 25'1, 19'7, etc
08-118
09 86'F and varying 59'F, 69'F, etc
10-495
20-10'0
21-070,060  (the rpms)
22-000
23-000
24-13.4 varying 13.7, 13.5
40-02
41-03
42-02
43- 6-C
50-104
51-72'F
52-93'F
54-OFF

I hope these lead us somewhere, by the way ..did I mention it was 109'F yesterday?    need a beer!!!

Thanks ! I'll be looking forward for your help....

did they check the system for a possible leak?


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

common places to leak is the expansion valve


_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...

Yes they did, no leaks....any suggestions?....

try to remove the panel and try to see if you'll get a good reach

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_________________
W I N D Z
Once is enough, twice is too much, thrice is a disaster...