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Secondary air injection system P2440 and P2442

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Saseun99, Apr 13, 2015.

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  1. Oct 24, 2023 at 10:17 AM
    #821
    Dm93

    #821
    Dm93 Test Don't Guess

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    When you say they replaced the ECU, you mean they replaced the Air Injection Control Driver Module or they replaced the Powertrain Control Module (PCM) or both?
     
    Dm93, Oct 24, 2023
    #821
    hewitt-tech likes this.
  2. Oct 24, 2023 at 1:11 PM
    #822
    grgrynlds

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    grgrynlds Member

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    Oh yes, the Air Switching Valve set is Denso. I'm trying to find out what wiring connector had the displaced pin. I think it was at the pump connection.
    Greg
     
    grgrynlds, Oct 24, 2023
    #822
  3. Oct 24, 2023 at 1:12 PM
    #823
    grgrynlds

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    grgrynlds Member

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    They replaced the PCM.
     
    grgrynlds, Oct 24, 2023
    #823
  4. Oct 24, 2023 at 2:38 PM
    #824
    grgrynlds

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    grgrynlds Member

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    Looking at the Air Injection Control Driver Module, looks like PN 89581-34041 does not fit this 2015 Tacoma (if I'm looking at the correct part):
    https://autoparts.toyota.com/products/product/driver-air-injection-control-8958134041
    This product fits 403 vehicle variants.
    TOYOTA : 5 models, 403 variants between 2005 and 2014

    I'm not clear on how this part fits into the SAIS...
    Greg
     
    grgrynlds, Oct 24, 2023
    #824
  5. Oct 24, 2023 at 9:03 PM
    #825
    Dm93

    #825
    Dm93 Test Don't Guess

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    Not sure about part numbers.

    The AID essentially is responsible for controlling the Air Injection Pump and Bank 1 switching valve, it has several inputs and outputs consisting of:

    Inputs:
    A main power input from the Air Pump Fuse (50A)
    An Ignition input from the EFI Fuse (10A)
    A constant Ground from Ground point EA
    A Bank 1 Switching Valve Command signal from the PCM
    An Air Pump Command signal

    Outputs:
    Power to Air Pump
    Power to Air Switching Valve (Bank 1)
    Diagnostic Signal to the PCM

    As for the codes based upon what I have read in service info the PCM uses a combination of two methods to determine valve operation:

    1 With the Air Pump commanded on it looks for a pressure change/pulsation when the valve is commanded open, if it sees no change/pulsation it assumes the valve is stuck closed and sets a code.

    2 With the Air Pump commanded off it looks for pressure pulsations when it commands the valve open, if it sees none it assumes the valve is stuck closed and sets a code.
     

    Attached Files:

    Dm93, Oct 24, 2023
    #825
  6. Oct 20, 2024 at 8:16 PM
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    redneckhell13

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    redneckhell13 New Member

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    Sorry new here, is slyfox75 still active i need a bypass kit, thank you.
     
    redneckhell13, Oct 20, 2024
    #826
  7. Oct 21, 2024 at 6:26 AM
    #827
    Revelations

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    Revelations Well-Known Member

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    I have a new hewitt bypass kit if you're interested. Send me a pm.
     
    Revelations, Oct 21, 2024
    #827
  8. Jun 3, 2025 at 11:36 AM
    #828
    VATACOMA39

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    VATACOMA39 Member

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    I'm late to this information. Is the 2015 Tacoma included in this TSB ? If so what is the number ?
     
    VATACOMA39, Jun 3, 2025
    #828
  9. Jun 3, 2025 at 12:11 PM
    #829
    Dm93

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    Dm93 Test Don't Guess

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    There is no TSB, extended warranty, recall, etc for the SAIS on 2013+ Tacos. The TSB/extended warranty for the SAIS only covered 2012 models with the 4.0L for 10 years from date of first use or 150K miles (whichever occurs first) so all are well out of the extended warranty by now anyway.

    The system was updated in 2013 to address the main issue that 2012 models had which was condensation collecting in the valves.
     
    Dm93, Jun 3, 2025
    #829
    VATACOMA39[QUOTED] likes this.
  10. Jun 3, 2025 at 8:10 PM
    #830
    Pigpen

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    Pigpen My truck is never clean

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    Bought my '12 new in '12. It has 195K on it and they just did the TSB work for free.
     
    Pigpen, Jun 3, 2025
    #830
    VATACOMA39 and TegoTaco like this.
  11. Jun 3, 2025 at 8:17 PM
    #831
    Dm93

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    Dm93 Test Don't Guess

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    Interesting, guess you got lucky because per the letter is 10 years from date of first use.
     

    Attached Files:

    Dm93, Jun 3, 2025
    #831
    Pigpen[QUOTED] likes this.
  12. Jun 4, 2025 at 11:39 AM
    #832
    Pigpen

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    Pigpen My truck is never clean

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    Yeah. They offered to do the work a couple different times over the years, when I went in ti buy parts. Recently they called me out of the blue to offer. I reckoned this might be my last opportunity to get it done for free - I had the paperwork in hand stating the 10 year limit. It took them all day, but they got it done. Here's to hoping it doesn't fail. Ever.
     
    Pigpen, Jun 4, 2025
    #832
    TegoTaco likes this.
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