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Hi TDI, im curious if by now youre AC is working again. Its almost 2 weeks now that my AC is back and running smoothly. Thanks to TN7CON. Now we know that there are thousand of cars out there, Toyota,Lexus, even BMW/Volks which have these faulty flow sensor issue B1479 error code for toyota cars. But only a handful have came to this thread searching for answers.Imagine how much money Toyota Lexus is making for replacing compressors.My RX had 102,000 kms when the AC flow sensor problem came up, therefore out of warranty.Good for us, we have TN7CON to help and guide us.My fellow workers were amazed with my experience, and i agree with you TDI, he is indeed sent by SOMEONE BIG.
Hello mitserolf,
apologize being quite for a while i had some family issues going on but no my ac issue has not been fixed yet as my flow sensor voltage when ac off is 4.18v does not go down even if manually engaging the clutch is done as of right now my car just parks in the garage its been hard to drive without air!
too bad TDI, i was hoping you have fixed it. I saw your techstream reading at 4.18. Well hopefully youll get other suggestions as what to do. Good luck!
Thanks buddy, as of right now my 2014 camry is just collecting dust in the garage i have almost given up on her. besides dealers wants $545 tax included so i dont know i am thinking about just doing a eveq and refill it back who knows it might work but thats a gamble as well
Just rigged up an AC flow sensor boost circuit using IC 741 op amp (instead of LM321 op amp), bench tested it, corrected one mistake, then installed in my 10RX .... works great, my AC system is cooling again ....
Here is my experience:
- The hardest part was to install the TechStream sw on to my 64-bit Win7 laptop, search Youtube for complete instruction ...
- In my 10RX, the AC amplifier is located to the right of the cabin air filter (located behind a door in the back of the glove compartment) ... and I could easily unplug the big F50 connector, locate the 3 wires needed to feed to my booster circuit ... a picture is worth a thousand words, so here are some pictures
- took about 20 mins to build the booster circuit, 10 mins to install it in my 10RX .... 30 mins total, saving about $2000 ... best feeling ever
The F50 number on the diagram, is it a location of the connector?
Yes, you could call it that ... the F50 connector is what Lexus calls the big connector at the AC Amplifier (located on the right side of the cabin air filter). Connector D10 is the flow sensor connector at the AC compressor .... hope it clears up some confusion ....
Yes, you could call it that ... the F50 connector is what Lexus calls the big connector at the AC Amplifier (located on the right side of the cabin air filter). Connector D10 is the flow sensor connector at the AC compressor .... hope it clears up some confusion ....
Thanks, where could I find a diagram that shows the location of D10 and other connectors? The connectors do not have any labels...
Hi TN7CON, to this date AC is still going great, thanks again. Now to ART2111, if we have the same cars RX 2010,2011,maybe 2012, then this fix should work if we have the sae problem,b1479 code, and your DCvoltage when ac is off is lower than 3.8DC, then it should fix your problem. by following all the super instructions by TN7CON on earlier posts ,you should be able to fix . Good luck, it surely worked for me. Good luck!
Getting b1422 compressor lock error when manual start magnetic clutch
I used the techsteram software to check the AC code and it read DTC B1479 as similar to others. But when I tried to start on the magnetic clutch the compressor started for a second but stopped immediately and showed b1422 compressor lock error. Does this mean I need to change the compressor ?
Any help will be greatly appreciated.
man this is my second summer without cold air
so found this info for camry 2014 flow sensor specs
a/c flow sensor specs (Toyota Specs)
min: 0.0
Max 5.0
Normal condition
A/C on, Blower swith HI: 0.7 TO 3.8 V
A/C off, Blower switch off: 3.8 to 4.2 V
A/C flow sensor is malfunctioning when a constant value between 0.7 and 4.2 V is displayed continuously for more than 4 seconds
p.s i do have the steady voltage of 4.18v does not go up or down regardless if ac is on or off. what you guys suggest? should the mentioned circuit work in such kind of situation considering the fact that malfunction is determine over 4 seconds could mean a "steady" voltage is considered faulty
RX350 2012 Air conditioning DTC B1479 another route
New member here,
My compressor was not running so after a new AC Amplifier which did nothing I found the DTC B1479 posts here and began the pursuit for a J2534 mini VCI cable and software. I had the flow sensor error stored and ended up ordering a new flow sensor off the auction site. I also obtained a set of manifold gauges and read up on all sorts of posts and videos. The sensor finally arrived and i climbed underneath to start removing the faulty part. After the snap ring went flying never to be found, the sensor was seized in its opening. I broke it off inside by prying too aggressively but was finally able to get the remains out. Whew!
Once removed I started to observe a high degree of white rust inside the opening and submit to you smart guys would this perhaps be a cause for the low output of the sensor. I can support this to a degree with this scenario. I did not immediately have a replacement snap ring so after cleaning out the white rust, I pushed the sensor in hap-hazardly not fully seating it all the way. My compressor didn't come on. i thought I was spinning my wheels. Only after getting a snap ring and re-cleaning the white rust out then fully seating the sensor did the compressor finally come on. Sorry i didn't capture voltages, but anyone have comments on this.
In summary the compressor comes on now and I topped off the refrigerant a little, nice cold air, many thanks to the DTC B1479 thread guys for pointing me in the right direction.
Might have the same issue with my 2010 RX350. Fiance got the oil changed at our local Lexus dealer and they changed the element filter and gasket as well. We noticed a weird smell when the AC was on starting that day after we picked it back up (6/20/18). Today when we turned on the AC it had an even worse smell and a small hissing noise coming from the AC/Stereo area. No AC. When I turn the AC off and leave just the fan going, the hissing noise disappears. Did anybody experience these issues prior to the AC not working anymore? I'm gonna take it back to Lexus tomorrow to see what they say, but I'm sure they will claim no fault. I work on all my other cars (SC400 - installed supercharger/switched to manual/GS300 complete suspension upgrade) so the fix will not be an issue for me to do. Just wanted some feedback to see if others had the same problems prior to the DTC B1479. Thanks!
I just went ahead and replaced the compressor my buddy helped me out, so i have the old compressor with me and decided to see if i can remove the flow sensor, which i did and surprisingly that thing is completely electronic the sensor is not mounted into the compressor instead its only attached, with that being said one can just remove the sensor and replace it with new one there is no need to evacuate the system you can see the pictures i uploaded and you will know what i am talking about
the new compressor part number is 88310-0R014
the one that got out from the car was TSE17C 447280-6290
thats the compressor came with the car i believe previous owner had replaced it and bought from junkyard?
Please read all the posts in this thread to determine if your issue is the same ... here are 3 more pics of the flow sensor voltage booster fix ... do it at your own risk ... Flow sensor booster Flow sensor booster diagram Flow sensor booster connections
07-05-17, 02:20 PM
