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Secondary air injection system P2440 and P2442

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

Page 42 of 42
  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
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  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

    #827
    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
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