I hope maybe you can help, you are my last chance. I have Maxima 2001 Japan, A33, with a 3 litre engine, Europe. First sorry for my English concerning car terminology.

I think I have problems with AAC VALVE - sometimes it happens, especially when I press acceleration pedal (on N or Parking) and pull it back - the speed of engine goes so low that most of time engine stops. I was clearing MAF but nothing helps - sometimes it happens even when I change gear to Drive and my engine stops. I think it could be AAC-VALVE.

This component is in Europe very very expensive. In Nissan they told me it's part number 237812y010. I found in the shop something with a different symbol. Can it be 23781U IACV-AAC VALVE VQ20DE? Please tell me if it will fit to my Maxima? I hope it is a small engine for slow turnovers, please correct me or give me a right terminology.

I found it here http://www.courtesyparts.com/23781u-...-p-193630.html . There are pictures there. Please confirm and if so where is the best shop to buy it in US?

I would like to add that on Diagnostic Consult II no codes in DTC in ECM. There was one spontaneous error of TP Sensor in Transmission. MAF is clean. AFAIK there is no possibility of recalibrating fuel system...
It is JN1CCUA33U0080854

 

237812Y010

Call Dave Burnette, he will have the best price on that item

 

Hi, thank you, Please tell me more, who is it, I am living in Poland right now. But I have family in US.
AND is it the same as on the link I have sent before?

 

DAVEB works at a Nissan dealership in Texas (South Point Nissan).
contact info:
888-254-6060 Dave Burnette.

Dave is fantastic guy to deal with and very knowledgeable if you know the parts number he can help you with the best price, It does sound like your describing a IAVC issue IAVC= Intake Air Volume Control ... Give him a call and discuss your issue.

 

O thanks, you are very helpful for me. What is responsible for slow speed motion of engine, when you press brake, for keeping it on the right level? A kind of step engine? What is the name of it?

 

If the IAVC module is not functioning properly that would keep making your engine stall out.

I am not sure I understand your question ... "What is responsible for slow speed motion of engine" can you describe a bit more detail of what you are asking

 

When you call Dave B, he will need to know as much information about your car as possible
- what year
- automatic or manual
- what is the build date of your car (if you look on the firewall inside the engine bay, there should be a metal plate mounted that has all the information on your car) it will have the Vin. number as well as the production date of your car.

Dave will need this information to help find the exact part for your car

 

Motor mounts?

 

There is a part called a step motor, or something like this. Like those small electrical battery engines.

 

Are you getting any check engine light codes? here is what I could find out about the step motor your speaking of.

"Basically the windings inside the IACV in the stepper motor portion are shorting out and it in turn shorts the driver in the ECM out."
"It is somewhat common on the 00-01 maximas for the IACV to short and fry the ECM."
"Be very carful not to replace the ECM and NOT the IACV if you have a idle problem.

If you replace only the ECM to fix the code P050* The shorted IACV will immediatly fry the new ECM.

The tell-tale sign of a bad IACV/ECM is a hunting idle and the P05** code stored and wont erase."

So it appears to be apart of the IAVC its self

 

"On Consult II no codes DTC in ECM" There was one error DTCP1705 Throttle Position Sensor - but I think it is something different.

Everyone here thinks it could be a stepper motor problem (that is the part I am thinking to buy) - but in my country noone knows much about Maximas - even in Nissan.

 

Here is a great site for searching answers ... as I read this it appears that the "Step Motor" is a part within the IAVC module that when it goes bad it not only takes out the IAVC unit but will also fry the main car ECU computer which is why the repair quotes you may have gotten are very expensive ... Have a look at the link

http://x.nissanhelp.com/forums/maxim...or-mounts.html

 

Problems are because of my English. So tell me if I understand:
I have problems sometimes with engine stifle while trying to move from parking place or driving slowly and braking after that.
You say it is possibly the Step Motor which was a part number 237812y010.
When the step motor goes bad at all, I wont be able to go at all because my engine will stop (not keeping rpm) it will fry the computer? So it would be the best thing to buy the new Step Motor. Isn't it?

 

As I said my reading of the link I gave you is the step motor is apart of the IAVC which sounds like you need to replace ... hopefully you have not damaged the main ECU, I read far to many times that they die ... Hopefully Dave B can assist you with the part you need, don't forget to tell him that you are a member on the .org as it will get you a bit of a discount.

Some more information in this current thread on the .org http://forums.maxima.org/5th-generat...-ecm-iacv.html

 

As far as I understand I should anyway try to find all IACV module and change it? My ECM is good as far as I know for now.
So other words: if I wait a bit more until those windings will short out I will destroy the ECM, right?

BTW I wonder if the link I sent before is what I need? http://www.courtesyparts.com/23781u-...-p-193630.html

Thanks a lot Ghost_54

 

here's yet another thread on the issue you have

http://www.justanswer.com/nissan/15f...idle-when.html

I hope you only need the IAVC based on what the cost is for repairing both issues

PS .. your English is very good, you were able to express the problem quite well and hopefully Dave B can help you through the rest

 

Please clarify one thing: IACV (idle air control valve) is something that has both step motor and those windings inside?

 

That is how I understand the postings that I have read through and giving you the links for.

You asked also in the other threat how to do the Idle relearn I posted a couple of links there for you to read, it will help you through the steps

 

Thanks I called Dave he will try to help me, but the question is why there are different part numbers in America... Is it only the difference in the catalogue or just the difference...

 

They have to be the same part. There is no way a component like that would be engineered differently for Poland versus America.