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    naderme's Avatar
    naderme Posts: 3, Reputation: 1
    New Member
     
    #1

    Dec 6, 2007, 07:59 AM
    Testing mass air flow sensor
    Can anyone tell me how to test air mass flow meter ( sensor)?
    I have 2003 Toyota corolla ( Altis in Philippine) 1.8G and has been running very well since I bought it new. Two days ago while driving to work, the car suddenly stopped, and will not start again. It had to be toed to Toyota and after two days testing, I was told they need to replace the air mass flow sensor, price around $500 plus $100 for labor. The car seems to be OK for now? I was given the dud sensor, but something tells me I had been taken for a ride? That is why I am requesting to know if it is possible to test the dud sensor using an ammeter or voltmeter.
    Any help is greatly appreciated
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
     
    #2

    Dec 6, 2007, 08:14 AM
    Quote Originally Posted by naderme
    Can anyone tell me how to test air mass flow meter ( sensor)?
    I have 2003 Toyota corolla ( Altis in Philippine) 1.8G and has been running very well since I bought it new. Two days ago while driving to work, the car suddenly stopped, and will not start again. It had to be toed to Toyota and after two days testing, I was told they need to replace the air mass flow sensor, price around $500 plus $100 for labor. The car seems to be OK for now? I was given the dud sensor, but something tells me i had been taken for a ride? that is why I am requesting to know if it is possible to test the dud sensor using an ammeter or voltmeter.
    Any help is greatly appreciated
    Inspect for dust or contaminants on the sensor: see the picture with the arrow.
    Using an ohmmeter, measure the resistance between terminals THA and E2. Resistance: At -20 °C (-4 °F) 13.6 - 18.4 KOhm At 20 °C (68 °F) 2.21 - 2.69 KOhm At 60 °C (140 °F) 0.49 - 0.67 KOhm

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    2. Inspect the intake air flow meter operation.

    1. Connect the intake air flow meter connector.
    2. Turn the ignition switch to ON.
    3. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
    4. Blow air into the intake air flow meter, and check that the voltage fluctuates.

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    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #3

    Dec 6, 2007, 08:40 AM
    The MAF Sensor may only have needed to be sprayed with MAF Sensor Cleaner, such as the CRC product below:

    CRC Industries Automotive

    It's available at WalMart.
    naderme's Avatar
    naderme Posts: 3, Reputation: 1
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    #4

    Dec 6, 2007, 09:31 PM
    Hi guys,
    I am deeply grateful for you both
    CaptainRich,
    I have followed your information, and since in Manila (where I am assigned ) the temp. seldom gets below 30 deg C, I plotted the figures you provided to get an approximate value for the Om expected to be @30 deg, which was 2.3kOm. When I carried the test on the sensor as per your instruction, at a scale of x1k the needle swung to zero, and when used x100 scale it registered 10. I guess that shows Toyota people were right after all
    Thanks a lot for your help
    Duane in Japan's Avatar
    Duane in Japan Posts: 282, Reputation: 8
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    #5

    Dec 7, 2007, 12:39 AM
    naderme, I am coming into Manila in a few days (Thur late, 13th) do you know anyone or yourself that would like to make a few bucks driving me to Angeles City / Clark / Fields Ave area?

    I would only proof out a bad MAF with an Oscilloscope, because I own one but it's a tough call sometimes without watching its pattern on a scope, of course, if its really really bad then the voltmeter will usually work.
    kitch428's Avatar
    kitch428 Posts: 1,440, Reputation: 152
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    #6

    Dec 7, 2007, 02:13 PM
    Wow, that's expensive in the Philippines! Good call on getting it fixed, though.
    naderme's Avatar
    naderme Posts: 3, Reputation: 1
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    #7

    Dec 7, 2007, 08:11 PM
    Hi Duane,
    Thanks for your input. As for your trip to Philippine, unfortunately I can not oblige, cause I will be leaving Philippine for my X-mass vacation, this coming Sunday.

    Kitch428,
    That is not the only thing expensive in Philippine. Except for rice everything else is !
    Duane in Japan's Avatar
    Duane in Japan Posts: 282, Reputation: 8
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    #8

    Dec 7, 2007, 11:22 PM
    Thanks for your reply and have a good vacation, I know I am.
    viperjet's Avatar
    viperjet Posts: 4, Reputation: 1
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    #9

    Oct 22, 2009, 05:38 PM

    I need to do a resistance check on my Intake Air Temperature (IAT) sensor on my 2006 Corolla ALTIS. But seem like it the IAT is located in the MAF which consist of a few wires.

    http://img42.imageshack.us/img42/5429/22102009305.jpg
    http://img132.imageshack.us/img132/4710/22102009307.jpg
    http://img94.imageshack.us/img94/5889/22102009309.jpg

    Anyone knows which 2 color wires belong to the IAT ?

    Please advice. Thanks..
    kitch428's Avatar
    kitch428 Posts: 1,440, Reputation: 152
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    #10

    Oct 22, 2009, 06:16 PM
    Name:  IAT.bmp
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    viperjet's Avatar
    viperjet Posts: 4, Reputation: 1
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    #11

    Oct 22, 2009, 07:04 PM

    http://dutch.northwestmr2.com/Toyota...Control/02.pdf

    PIN 1 (+B)
    PIN 2 ( E2G)
    PIN 3 (VG)
    PIN 4 (THA)
    PIN 5 (E2)

    To measure the Signal of the IAT sensor... should it be PIN 2 & 3 ? Instead of 4 & 5 ?

    Please advice ?
    viperjet's Avatar
    viperjet Posts: 4, Reputation: 1
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    #12

    Oct 22, 2009, 07:15 PM

    http://img40.imageshack.us/img40/8376/mafk.jpg
    kitch428's Avatar
    kitch428 Posts: 1,440, Reputation: 152
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    #13

    Oct 22, 2009, 07:54 PM
    Quote Originally Posted by kitch428 View Post
    Name:  IAT.bmp
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    According to what I sent it would be pins 4(THA)&5(E2). Brown is ground, yellow/black is 5V
    viperjet's Avatar
    viperjet Posts: 4, Reputation: 1
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    #14

    Oct 23, 2009, 11:56 PM

    I bought this Chip and it asked me to connect across the IAT..

    #1 PERFORMANCE CHIP TOYOTA COROLLA 1985-2009 2008:eBay Motors (item 390102430174 end time Oct-12-09 06:10:53 PDT)

    Can I connect it parallel with pins 4(THA)&5(E2)?
    kitch428's Avatar
    kitch428 Posts: 1,440, Reputation: 152
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    #15

    Oct 24, 2009, 06:03 AM

    Yes
    marinetech1's Avatar
    marinetech1 Posts: 1, Reputation: 1
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    #16

    Apr 15, 2010, 03:41 PM
    How to test a mass flow sensor on a 2001 frontier 4cyl
    manfrednissley's Avatar
    manfrednissley Posts: 1, Reputation: 1
    New Member
     
    #17

    Sep 13, 2010, 06:37 AM
    Comment on CaptainRich's post
    Can you tell me if this maf sensor is the same used in the 2002 Corolla?
    bobbill's Avatar
    bobbill Posts: 2, Reputation: 1
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    #18

    Oct 4, 2011, 06:56 AM
    Cleaning the Mass Air Flow (MAF) sensor usually works. There are some pictures in this link that show you where to spray the cleaner. Most Toyota cars use the same sensor as shown at the bottom of the page in this link. It's most important that you clean the two small, VERY fragile wires that are up inside of it.
    bobbill's Avatar
    bobbill Posts: 2, Reputation: 1
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    #19

    Oct 4, 2011, 07:04 AM
    Most toyota models use the same Mass Air Flow (MAF)sensor, and it is usually VERY easy to clean and/or replace. I own a toyota echo, and it takes 2 minutes with nothing but a screwdriver for me to get it out. It is usually located right after the air filter. Once you have it out you just need to spray these two VERY fragile wires that are up inside of the sensor with the proper cleaner. You can purchase MAF cleaner at Autozone, someone told me you can also get it at Wal-Mart. I've heard of people using rubbing alcohol and a Q-tip. If you use a Q-tip be EXTREMELY careful to not break the wires.
    Here are some pictures of where to spray the cleaner:
    http://www.top4runners.com/ja/cleanmaf.html
    iustin2009's Avatar
    iustin2009 Posts: 4, Reputation: 1
    New Member
     
    #20

    May 23, 2012, 01:16 PM
    @CaptainRich
    Hello!
    1) can you tell me if the MAF sensor for avensis 2.2 d4d should be in the same parameters? ( I can't check the voltages due to the safety glue around the wires but the resistance is the same at +20C)

    2) the car is starting now in the "damage mode" (check engine light on, vsc + trc off, no power from turbo) and the engine will not start without depressing the accelerator (gas pedal).My brother was at 3 different dealers and they all come out with a different problem: the EGR valve, then the SCV valve, and 3rd - the throttle body need to be replaced (1500.00$); can you, please, give me an advise about it? Or you can recommend me a good tester device to help me fixig the problem?

    Thank you in advance!

    PS: please excuse my bad english!

    I uploaded a video with the engine running.


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