How To Test and Replace Idle Air Control Valve P0505 HD | IAC Actuator
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- เผยแพร่เมื่อ 27 ก.ย. 2014
- The IACV valve is operated by a step motor. This motor has winding phases and is actuated by the output signals of ECM. Each time the IACV opens or closes to change air quantity, the ECM sends a pulse signal to the motor. A certain voltage signal is issued so that the valve remains at a particular opening. Check with your vehicle's repair manual for testing parameters. This happens to be a '97 Nissan Maxima.
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P0505 - The IACV does not operate properly.
Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.
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Carsntoys
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You just saved my Pathy. This old video is a gift that keeps on giving.
Is it an R50 ?
Thank you for showing the way to test the IAC. I am going to test mine tomorrow. I was really worried that I was going to have to replace the part and I don't have a lot of cash. SUBSCRIBED!! And please keep the videos coming this one was very informative.
I like your videos they are real clear and not music, clear images,nice,just few like you thankyou
My 2002 Buick Rendezvous RPM jump up and down at come to a stop
78a GOING ON RIGHT NOW I'LL COME AND TELL YOU
Very well explained. Thank you. Found code for IAC on a vehicle that i was working on today. Engine is really rough. Multiple misfires, running rich and whatnot. Perfect time to perform test.
Thank you! Looking at a car with no real issues except an IAC code. Your video has LOTS of testing info, and the picture-in-picture was a NICE addition. Very informative!
I cannot Express how thankful i am for these videos you taught me so much!
Thanks man 👍. U are more helpful than the repair manual. Excellent presentation
Thank you so much for this video , I have a 93 Summit with this part on it . This really helped.
This is a great video. I've been working on an idle issue on my mercruiser boat engine. Someone explained to e that I should check for power and resistance on my wiring harness at the IAC. I had no idea how to do that until I watched your video. Great attention to detail. The inset camera view as you test for resistance is a great feature! Thanks a bunch!
rossi7r
Best video instruction for IAC valve I've seen.
Excellent video !! Thank you very much !!!
Thanks a lot Dude. I'm having idle issues with my car and I didn't know how to comfirm if the IACV was responsible for it. That's history now thanks to your very informative video. God bless you.
Nicely done video. Concise and clear.
Excellent video sir. Very detailed and well-edited. Thanks.
That was a great video. 👍🏼
your very detail about your videos there great.. i was hoping you could help me out. i had a stuck idle pulley it was melying the blet. change it works good now. but i noticed that my 2003 dodge durango truns off now when im at stop. also if i have it on park and give it some gas about 4,000 rpm it dies... i was told to adjust idle. would you know how yo do that.. i was also told that i should just clean the throttle body and iac.. any recommendations.. thanks
Thanks for these videos! Makes it really easy for non-trained persons to do simple maintenance on their car!
Thank you for the feedback! Glad to help.
thanks for the time you took to help others learn
Glad to help.
Nice video. Direct to the point unlike others it takes 30mins just to explain this🙄
Lifesaver, thank you
excellent, thank you.
Excellent! Thanks.
Great vid ,very helpful
Glad to help. Cheers.
Very informative and well done video! I wish more 'how to' videos were like this.
Thank you!
Michael Vinson
Great video, very knowledgable and informational
Wow! Very nice e video!!!
Thanks for the video. .my iac went out and because of you I had the knowledge to test and replace it thanks again
+Jean Gimenez Glad to help man
Great video. Buying a good digital meter paid off with its first use. Since my Eclipse GT wasn't throwing any codes, but wouldn't idle, I needed to test the part I thought might be the culprit. This video showed me how to do it. New IAC= Big smile & big savings!
Sweet! Glad to help.
I can't tell you how great this tutorial is! You're the best!!!
+Errol Dillon Thank you
Thank you,big help
+anthony You're welcome.
damn good video. clear and easy
Thank you. Hope it helped.
Thanks bro .I managed to repair the 1 g eclipse. like your video hello hungary
Thank for the tips. My car IAC has the same 6 pins. 👍👍👍
Glad it helped
What are the part#'s for the 5 screws that hold the IACV to the Throttle Body? I messed up those phillips head screws removing them cuz they were a bit stuck. 2001 Maxima GLE
Thanx for the vid. Helped alot. On my way to buy a new one. When I tested the old one had 5 oms of resistance. When I took it out to see if it rose whenthw ignition was on the top part went flying out. Hahaha. Hope this solves my problem. Thanx bro.
Henry M Cool man. Glad to help
Cool, like that you showed it OUT of the TB , as my Haynes Manual doesnt cover
Much info at all for a 90s Chrysler V6 3.0..... AIC Demystifyed ! ! !
me sirvio tu video amigo gracias
Great video
Happy to help.
Thank you for the video. Quick question, I was getting P0505 too and bought a replacement part on Amazon. No more p0505 code but this particular IAC makes noise when the key is set to accessories. It sounds like a little motor is constantly running. Is that normal or should I ask for a replacement?
Excellent video, very helpful, a mechanic told me that after a replacement, The computer should be reset? it is a mitsubishi outlander 2003. is this neccesary? how reset the computer?
I checked mine with just turning the key and now im getting a check engine light that i did not have before so what do think happened?
Great video!
Michael Muro Thanks man. Appreciate it.
+CarsNToys Saved me a good chunk of change! Turns out my problem was an intake manifold gasket. $12 fix Vs $79!
i replaced the iacv with a used one and still the same problem, at cold starts it stalls until it warms up, no vacuum leaks. what else could it be or should i have replaced it with a nee iacv? thx.
Hey man i have a question. I did the last test and the pintle shot out of the IAC. Is that because i was stupid or something else every time i turned the car to the off position it would go out so far then it shot out still trying to find it as we speak.
subbed. good clear explanation
Thank you. Glad to help.
CarsNToys hey mate. I've changed this, ECU, air flow. and yet it still idles at 2200 when cold! the coolant icv kicks in when warm but when it's cold it's high revving. it's a 92 Mitsubishi Pajero ( Montero ) 3.0 v6. any ideas? thank you
CarsNToys it's reads 12.6 volts at those terminals to.
My Camry 2004 Le is throwing P0505 error code. I just replaced throttle body. Do you have suggestion any fix/suggestion for Camry.
You video good more video i hote :
Does the first test applicable in all 6 pin iacv? Mine is suzuki and has a 6 pin iacv. I wanted to test the iacv coz my engine when running for 30 mins there's a problem occure like when you press the accelerator a little bit the rpm will surge to 1800. Also I notice that when the ac compressor cut off the rpm also surge to almost 1800.
Thanks for the fast response I really appreciate it. Would you happen to have a video on the vacuum hose and valve you are speaking of. Thanks again
+doug resha Unfortunately I don't. The Maxima I usually work on is older and doesn't have this vacuum hose.
Great video, you test for power in the sensor, the sensor has 6 pins, you only showed the two for power, what are the others 4 pins that you did not test, are they 2 grounds and two signals? Please let us know and what are the voltage of those others pins, thank you. Cheers from ontario ca
Good Video work with the Picture In Picture (PIP) showing the details of the testing the connectors. Those details make all the difference when trying to learn what you're doing. The are a lot of instructional videos on TH-cam but the camera work is so bad that your not able to see what exactly that the person is working on. I appreciate the extra attention to detail for learning purposes. Keep up the good work
Thank you very much!
how you're doing I have a 1996 mercury grand marquis gs and it's making a very loud humming noise and I thought it was a wheel bearing but it wasn't a wheel bearing they said it was a idle air control valve so all I have to do is just change it and it will eliminate the problem
Very informative. Thanks.
Ty
Does the 2006 lexus gs300 have the IACV ?
I can't seem to locate it
Does this work for motorcycles as well? I’ve took my IAC valve of and left it connected..when I turn the key to on position, it doesn’t move at all..
Side note: I’ve been having problems with my motorcycle not being able to idle for more than 5 seconds..I changed everything but today I decided to check the IAC valve and it doesn’t move on the key on position
Nice watch. :), Personally, I don't wear jewelry when working on my car. Just saying. Great video. I'm off to get my new part.thks
Great explanation... I followed your last test. When I turn on the ignition I hear the IAC click and if I leave it in the ON position for a few secs without starting the engine, the IAC clicks back to the off position. Is this normal behavior? Thanks Jake
Do I need to reset my computer on my 1999 Subaru legacy outback, after I check and clean my IACV? I didn't actually remove it all the way but after reassembling, my car is now acting like my battery isn't working for a minute. It starts but immediately dies. When I try to turn over again, it acts like I have a dead battery but if I wait a second then try again, it starts but not in a strong way. I know my battery is fine because I just got it tested. When my father and I replaced and adjusted my TPS the other day, we followed the recommended computer reset protocol and that got rid of the At Oil Temp and check engine light. It is shifting so smoothly now and all seemed perfect so we decided to see if we could clean the IACV, we were concerned we might screw it up so just shot carb cleaner into it and then put all the hoses and sensors back into place. Seemed to be fine until the next day when I went to start it and experienced it dying and then having issues starting. I've never had an issue with it starting. Wondering if i should've done the computer reset after messing with the IACV too. Or perhaps we didn't put something back correctly? Anyone have any advice here?
Sir. I wont now this 2pin 12v coming from ecu if is change by mistek is any problem for iacv fungtion?
Thank you for your informative video. In regards to the last step, how can I supply power to the IAC without removing it completely (since mine is part of the throtle body assembly) using a multimeter to see it actually mechanically moving? Thanks.
MrDoNHS You can supply power to the valve and you should hear the valve turn on and off. Give that a try.
Would be the same test for a two pin set up. 2001 ford ranger 3.0l I put in a new one and still getting the code and running really bad. I''m thinking it might be a bad ECU. Any thoughts
Greg Seleen Did you figure out what the problem was? I have a 2000 Ranger with a 3.0L.
I’m having that same clicking noise, you got in the background right after I replaced my valve gaskets 😕 anyone know what that is?
in Nissan sentra 2003 should idle valve axle go out or go in after switching on because I have rpm problem and note that my idle valve work opposite the video '''putting car on universal computer found no DTC ,,,my idle rpm 1000 and fluctuating while driving if I release petrol pedal on gear
Can you show how to check harness for short to ground and short to power? This is actually the next step someone should do after doing the methods you showed. Thanks.
Question regarding a 2002 Nissan Sentra GXE. The resistance check is good and the voltages are good. I have removed the valve to check if it moves when turning the ignition on/off and it does not move. The valve was taken off of a working car. Any suggestions?
Mirko Miljanovic If the valve doesn't move then you'll need a new IACV.
I have a 2002 Nissan maxima, I cant find the iacv, ibthought it was connected to the throttle body as it is on the 2000-2001 model
i rerplaced my iac on my 2002 SS,,still has a too high idle,,so its on to the next step??? intake leak perhaps???
does the iac valve cause symptons of
1. high rpm over 1000
2. low rpm 1000 or less
3. car shakes when its on
4. lack of power like if the car wants to shut off while you driving it or not driving it. ???
5. motor feels weak like if it dont wanna stay on feels like if it want to shut down??
6. can it also cause battery to die out also??
sorry just curious to know
please help me on this one.
thanks for your time and patience
god bless.
Great videos. I have a P0505 hard code which I believe has something to do with either the ISC motor and/or ECM. But before I fix this code and spend lots of money, I noticed that all four of my readiness monitors are NOT complete. I understand the procedure to reset these readiness monitors, but do I need to repair this P0505 first BEFORE I can run the readiness monitors? Is there another option or procedure to reset these readiness monitors first?
I know I can get several other codes when the four readiness monitors are run, but is there a way to reset these monitors so I have an idea of what else is wrong with my vehicle? I don't want to spend money to repair code P0505 ONLY to find out other codes later when the readiness monitors are run. Please help.
hey just saw this awesome vid. but I came into a problem. did everything you did and everything thing checked out cleaned it up a bit then put it back in but still have code showing. any advice?
Stephen Horton you must clear codes after each replacement fix to see if it comes on again
Does the iac stay buzzing in the in position?
Thanks for the tip on Ohms. I bought a new one and my car did not run well. I tested the new valve (mine had only 2 pins) and there was almost no resistance.
+craze1701 Glad to help!
I tested the IAC VALVE like you did in the end of video. And it only move left to right not out and in. Does it need replaced? Can I send you a video of what it does so you can see what it does thanks.
Yes need to replace
on the diag device what is meant by actual stepper motor value?
I got question guys. I got a 1998 5.7liter GMC Suburban. My idle seems to be a little high, it's idling now more or less at 1300 sometimes seems like 1500 , Do you think that the idle control valve could have something to do with this issue? I was thinking maybe it was possibly stuck open.. Thanks ahead again guys, you guys are always highly appreciated! 👍
Good good video, T have a 01' Mazda Tribute 3.0. Idles rough, checked IACV clean inside. No power at key ON!
Im on disabillity, things are tight like most places. That fuse on the IACV also tends to EEC, VPWR, EVR, MAF, ( bulkhead)?
Most abbreviations I'm familiar, but EEC , EVR? V power ! I guess ?
Ha ha it starts right up! 5 seconds later it starts to stumble to death (dies)! Plz sir i need help .
would that be the same for nissan pulsar n16 motor
I have a 04 Ford Freestar that will act like it's running out of gas at first cold start. Fuel pressure is fine. If I hold RPM's at 3000 or more for a minute it will be fine but RPM's at idle are jerky. No check engine lights are on. Sound like the IACV to you?
Thanks
+Paul Brownfield I'd check the iacv and pcv valve
omg this is so helpful right now my car is idling like.3000 rpm I just replaced the throttle body part but trying to figure out why it idles so high when I turn it on
+Mely Serrano Sounds like you may need to adjust the throttle position sensor.
Tried the last step where you take out valve and turn the key, my valve exploded like others said theirs did. I got a new valve in and it actually fixed my idling problem but be warned, you run the risk of destroying your valve if you actuate it without it being mounted in your vehicle!
I have a chaser 1jz ge engine and when I start rpm is going like from 2000 to 2500 up and down what now
Interesting ! My 95 3vzfe wont start cold without pedal. Idles hot at 4 to 500 and tends to stall. THANX
All your testing checked out for me except for the last step at 5:20 on my 95' 3000GT. When I turned the car on several times, the shaft did not move at all. I decided to try it again and the first time I turned it on, it moved ever so slightly but wouldn't move again after I turn it back off and on. Is this an indication this part needs replacing?
Sounds to me it needs to be replaced.
+CarsNToys OK thanks, hopefully it fixes the reason why my car is shaking at idle and lacking power
Great video. I tried to remove the iac from my car but I stripped one of the screws. Any ideas to get it removed? Tried using pliers but couldn't get a good grip to loosen it up. Thanks in advanced!
Dear guy, My Mitsubishi Galant year 1990 has a problem the rpm not stable in idle. When give load like AC ON or Head Light ON or move the wheel steer
the idle rpm will run rough up and down excessivelly and sometimes the engine shut down by it self. I already changed the Idle Valve sensor 2 times and check the resistant is ok. The output power from the plug is 12.5 volt, but the problem still exist.
I checked the movement of the Idle Valve sensor plunger but it movement was only shaking and not extend or retract.
Is the ECU bad ?
Please your suggest.
Thanks alot.
John Purwanto, Tangerang City, Indonesia.
First off thank you for such awesome informative videos! I did your test procedure on my 2000 maxima with the p0505 code, and it all checked out to be ok. I am still getting of course the p0505. Could it be that the throttle body needs a good cleaning, or what else would cause the code? Thanks in advance for your help and keep up the great work!
+doug resha Thanks man. If you checked the harness connector and the iacv, the '00 Maxima also has an air control valve on the power steering. If the vacuum hose or valve stops working correctly, you could get code p0505. You could pinpoint it quite quickly with a sophisticated scan tool. The basic scan tools won't pick it up.
@@CarsNToys but you didn't answer his question, if you do check All those things, what else can it be? I assume vacuum leak, are their any worst case scenarios with a p0505?
My 2000 dodge ram van 5.2 V8 is showing that code right now
Could you please help me locate the IAC location on 2002-2005 Audi A4 1.8T B6 Model? mine is 2005 B6 and I am having terrible time with my idling. Every effort to locate the IAC has been unsuccessful
my car idles like crazy and stops on me its a 96 nissan maxima if i clean ghe iac will it help i cleaned first half of my throttle but didnt take it fully apart to clean.other side any tips? i really need to fix this
Any trouble codes?
+CarsNToys yes i have a check.engine ligbt i need 3 replacr.my.Egr.tempersture sensor? can it do.with that
So this must be the winding noise I hear...I just installed a repaired ecu from ebay and my car won't stay on unless I give it gas once it warms up it will stay on...where can I get a new one iac and why is the ecu not calibrated to work right
So I have a 99 gmc sonoma. And she runs great. But! Every day coming home from work the rpm surges when I'm doing over 70mph. My gmc does not have the check engine light on or any other. And when the rpm surge happens she has power. No transmission slip she takes off and when I step on the gas it goes down to normal speed but continues to surge.
When he activated the IAC at the end, I didn't see anything happen. What did he see that is not on the video ?
Great video, but I need to go a bit deeper. I want to learn exactly how the IAC steps, they are not simply fully open or fully closed, they can be set to various positions by the ECM to get different idle speeds.
Yours has two sets of 3 pins. Pins 2 and 5 have 12V to them, then I guess a Ground signal from the ECM on pin 1 half steps the valve in one direction and then a Ground on pin 4 puts the other half step in that direction. To move the valve the other way, the ECM applies Ground signals on the 3 an 6 pins in a similar fashion.
Is that correct?
I have a GM 1987 2.8L V6 Fiero. My IAC valve has only 4 pins. I want to make a setup to actuate the value on the bench. My brother is an instructor at Porter and Chester and he would like to have a little set up to demonstrate how IAC valves work to his students. So learning how they actually work is the first step.
I read 50 Ohms across each pair. I guess one pair moves the valve in one direction, and the other pair moves it in the other direction - but not quite, read on.
I took some baby steps and tried it with 5V first... no action. Then I tried it with 9V (to be safe).
One pair of contacts, still no action, but on the other pair puts a small twitch on the plunger in one direction (even if I reverse voltage polarity on the pair, it still twitches in the SAME direction).
Ok, I guess it does use 12V, but seeing just a twitch is on right path. But the twitch was rotational on the plunger NOT in or out, and again, I expected it to twitch in the other direction using the other pair of contacts - but not the slightest twitch with those contacts!
So, before I try it at 12V, I need to get a better idea on what signals/timing the ECM puts on the IAC valve to actuate it.
There appears to be no position feedback from the valve to the ECM.
I guess on power up, the ECM steps the valve many, many times to get to a fully open (home) position, and then the ECM keeps track of the step pulses to determine its position from then on - until power off.
I have used stepper motors many times in the past, and that is what is nice about them, you don't normally need any feedback because the are dead on accurate on the position (and knowing it's position) if you pulse them properly. But I have no operational specs on my IAC valve.
Any ideas?
Thanks.
i just replaced mine now my truck wont start seems like its not getting no spark also aren't u suppose to disconect negative battery cable from battery to prevent damage to the sensor
after replacing the sensor you will have to reset the KAM. this will make the pcm relearn its position. IAC is a stepped motor and it must relearn its position according to fuel trim and A/F ratio.
Please can someone help me. I have a 95 mit eclipse sr I dont have power to the idle speed control. I replaced it with a new one, still no power, new computer, power turned on but its out again, checked all the wires, put new connectors....
I had some issues on my 2001 maxima and for p0505. And found that the intake boot badly cracked just before throttle body and got p0505. I replaced intake boot and cleaned the check engine light and it never came back. But strange sticky throttle Happened. Loose throttle cable fixed that but still had some strange idle. I had to do a idle air volume. Relearn procedure which is specifically for 2000-2001 maxima.
After that it’s been fine.
www.nissanhelp.com/diy/maxima/projects/2000_2001_nissan_maxima_idle_air_volume_learning.php
Love your vids very clear and to the point.
Good show. But if ur having idle issues u may need to clean the valve and seat and air passages and throttle body too. Or u could have significant vacuum leak somewhere. Or u may need. A tune up. Plugs ,cap n rotor, fuel filter, air filter, pcv valve, ect.
Thank you.
I like the video, only suggestion would be to go a bit slower when showing where this part 'lives' and zoom in from wide view towards the part/area of the car you are working on. But great Info!!
Appreciate the feedback.
HI Great Video very detailed!
2 quick questions please? 2001 Nissan Maxima. In park the rpm's go from 1200 to 1800, back to 1200 back to 1800. It does this very quickly and does not stop. Is this a symptom of a bad or crudded up IACV? Also I read one place that replacing the IACV could short the ECM or maybe when it fails it could short the ECM, have you ever heard of this? I'd like to prevent a shorted ECM from happening if possible when I go to check and possibly replace the IACV.
Thanks a lot!!
Just had the same problem on my 96 maxima iacv disrupted my ecu got another one from eBay along with the ecu put me back in the game💪🏿
Also check your tps
Yes, I ended up replacing the IACV and having the ECM rebuilt....
@ carsntoys - I have a 1998 Ford Explorer XLT that idles poorly when cold & only a little better when warm. Is the IAC the problem, or O2, or F/A sensor or "all of the above" ?
No Hate On's Please.
+Tony Penner Is the check engine light on? If so, what are the code(s)?
+CarsNToys - It was the O2 sensor 1, bank 1. I replaced it (with much grief), with a new one & seems to idle ok. I then took the negative battery cable off for 5 mins., but the check engine light is still on, but the system says all is ok.
Tony Penner
Glad it worked out. The light will go off eventually. Just has to cycle.
I have the code and replaced the iac # 530 306 57ab on a 1999 dodge Durango. After spraying carburetor cleaner all over the carb and cleaning it and putting on the new iac it will not start at all. The security light is on. I disconnected the battery to reset it still won't start.