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2002 Tacoma V6 Code P1135 Pinout for the F/A Sensor?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Blackwell99, Jan 3, 2017.

  1. Jan 3, 2017 at 4:51 AM
    #1
    Blackwell99

    Blackwell99 [OP] Member

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    Hi all.
    I tried searching the forum for this but no luck.
    I got a p1135 code and want to check the sensor heater circuit.
    Does anyone have a link to the pinout of the plug?
    The part of the OEM is 234-9001 Denso.

    Thanks
    Mike Davies
     
  2. Jan 3, 2017 at 5:00 AM
    #2
    Caligula

    Caligula It's the COVFEFE

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    I like your approach, how you are trying to confirm the circuit is operating correctly before throwing money that parts. Not enough people do that before posting.

    On this forum is the factory service manual. It will have the wiring schematics for the engine electrical. You should find it in there. Try the ground first, you'll need to remove the glovebox to get to the Ecu plug to check the signal side.
     
  3. Jan 3, 2017 at 5:07 AM
    #3
    Blackwell99

    Blackwell99 [OP] Member

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    Thanks,
    I hate to ask but how do I find it? A general search of the forum does not find it?
    Mike
     
  4. Jan 3, 2017 at 5:14 AM
    #4
    Caligula

    Caligula It's the COVFEFE

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    It's stickied above.

    If you hook up the meter in series you should be able to see if the heater is functioning. You'll need to use something to simulate air flow. Using a OBD tool you can also see the raw voltage.

    The MAF heater is just there to keep the film at a set temperature. The air flow causing a drop in temp will result in an increase in voltage to maintain the temperature. The ECU measures the voltage drop as the level of air mass entering the system.
     
  5. Jan 3, 2017 at 5:34 AM
    #5
    Blackwell99

    Blackwell99 [OP] Member

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    Thanks
    I was just to going to check for voltage to the heater and coil restiance, that should tell the story. I just wade through than manual to find the pinout.
    Take care.
     
  6. Jan 3, 2017 at 5:38 AM
    #6
    127.0.0.1

    127.0.0.1 AKA ::1

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    if the sensor has over 100,000 miles on it and it is throwing sensor heater circuit
    it is 99.9999~% chance a real code. just go get an OEM sen$or (there is a updated P/N from the time your
    truck was new, the last digit changed) and install with new gasket
     
  7. Jan 3, 2017 at 5:43 AM
    #7
    Blackwell99

    Blackwell99 [OP] Member

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    Thanks :)
     
  8. Jan 3, 2017 at 10:44 AM
    #8
    Blackwell99

    Blackwell99 [OP] Member

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    Hi,
    Any thoughts on Aftermarket?
    Thanks
     
  9. Jan 3, 2017 at 11:24 AM
    #9
    127.0.0.1

    127.0.0.1 AKA ::1

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    aftermarket is ri$ky as the toyota ecu is extremely fussy and wants to see
    the exact waveform. if you go aftermarket get DENSO only
    and the exact replacement match for the toyota part number
     
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  10. Jan 3, 2017 at 12:58 PM
    #10
    Blackwell99

    Blackwell99 [OP] Member

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    Thanks a lot.
    Looks like I'm stuck :)
    Autozone wants 170.00 for the Denso Part. Luckily you can find them cheaper
     
  11. Jan 3, 2017 at 1:41 PM
    #11
    Caligula

    Caligula It's the COVFEFE

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    Do not buy aftermarket sensors. Ever.

    And fuck Autozone. Might as well go to the dealer. Try a local parts counter or even Napa. Where are you located?
     
    127.0.0.1 and Blackwell99 [OP] like this.
  12. Jan 3, 2017 at 1:54 PM
    #12
    drr

    drr Primary Prognosticator

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  13. Jan 4, 2017 at 6:12 AM
    #13
    127.0.0.1

    127.0.0.1 AKA ::1

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    I am with ya on this, but my denso a/f direct replacement on my 99 4runner has been solid

    a previous bosch I installed only worked for 200 miles after ecu reset, once ecu recalibrated
    it kept throwing codes. dumped it, went denso, all good
     
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  14. Jan 4, 2017 at 6:18 AM
    #14
    Blackwell99

    Blackwell99 [OP] Member

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    Hi,
    New Orleans. I'm checking Ebay and Amazon. Napa wants the same 179.00 I like the idea of no sales tax though. :) The problem with Ebay is making sure you don't get scammed.
     
    Last edited: Jan 4, 2017
  15. Jan 4, 2017 at 11:12 AM
    #15
    Caligula

    Caligula It's the COVFEFE

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    Go with Amazon. They will take returns no questions asked.
     
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  16. Jan 4, 2017 at 6:28 PM
    #16
    cruiserguy

    cruiserguy Well-Known Member

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    Yeah, Denso is the OEM of the sensor for Toyota. You just bypassed the 'Toyota' markup. The smart way to do it. :thumbsup:
     
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