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Accessing the Ambient Air Sensor 2015

Discussion in '2nd Gen. Tacomas (2005-2015)' started by wmgeorge, Jul 28, 2021.

  1. Jul 28, 2021 at 4:09 PM
    #1
    wmgeorge

    wmgeorge [OP] Well-Known Member

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    On my 2015 I can see the Ambient Air Sensor mounted directly under the hood latch area but there seems to be no way to access that and get a read out on my Scan gauge. Is it because just the HVAC control system uses it and not the truck in general? When it cools off outside I will disconnect the plug and see if its throws a Code. Unless someone else already knows the Answer??
     
  2. Jul 28, 2021 at 5:49 PM
    #2
    Dm93

    Dm93 Test Don't Guess

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    The A/C amplifier is the only module that uses it and it isn't on the network therefore it can't be read with any scan tool that I'm aware of.
    Your only option for ambient temp is a Gentex rearview mirror or something homebrew unfortunately.
     
    PzTank likes this.
  3. Jul 29, 2021 at 4:59 AM
    #3
    wmgeorge

    wmgeorge [OP] Well-Known Member

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    DM thank you for your reply, I was hoping it could be read. Having problems finding the Gentex mirror combo and I dread the thought of stringing all those wires.
     
  4. Jul 29, 2021 at 6:46 AM
    #4
    Dm93

    Dm93 Test Don't Guess

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    Pull your upper console down and see if you have the plug there, if you do you can use this kit and only have to run the 2 temp sensor wires and mount the sensor.
    I've had it in mine for over a year now and been very happy with it, took me less than an hour to install.
    [​IMG]
     
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  5. Jul 29, 2021 at 6:53 AM
    #5
    wmgeorge

    wmgeorge [OP] Well-Known Member

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    THANK YOU!! Exactly what I was hoping to get for a reply!!!!
     
  6. Jul 29, 2021 at 6:59 AM
    #6
    Dm93

    Dm93 Test Don't Guess

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    I'll snap some pictures of my install when I get time, there's 1 philips screw holding the uper console behind one of the sunglass holders if I remember correctly, the rest is clips.
     
  7. Jul 29, 2021 at 7:15 AM
    #7
    wmgeorge

    wmgeorge [OP] Well-Known Member

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    So it comes with mirror options
    which one is better?
     
  8. Jul 29, 2021 at 7:33 AM
    #8
    tacoman45

    tacoman45 Well-Known Member

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    So is the temp sensor just plug & play with the Gentex mirror? I have a 2014 Tacoma and am wishing the mirror displayed temperature. Your picture makes it look like the OEM temperature plug is still there but not used
     
  9. Jul 29, 2021 at 7:34 AM
    #9
    Dm93

    Dm93 Test Don't Guess

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    I did some searching when I bought mine but I couldn't come up with a clear answer, they seem to be the same thing.
    Maybe the 455 is a newer model but idk:notsure:
    I went with the 177 Dual display, I paid the extra to get the cover (seems overpriced for a piece of plastic) for a cleaner install but thats up to you.
     
  10. Jul 29, 2021 at 7:42 AM
    #10
    Dm93

    Dm93 Test Don't Guess

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    The plug supplies ignition power and ground to the mirror, you will still have to run the 2 wires and mount the temp sensor that comes in the kit.
    While there is a "temperature sense" wire in the plug it is a digital signal and NOT compatible with the Gentex mirrors, if you try to connect to it you will fry your mirror or the A/C amplifier.
    The earlier trucks that still came with the temp display in the mirror used it I believe but from what I've read that's a Toyota specific mirror and good luck finding one.
     
  11. Jul 29, 2021 at 8:08 AM
    #11
    Dm93

    Dm93 Test Don't Guess

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    Here's where the screw is for the upper console.20210729_095105.jpg

    The mirror installed.
    20210729_095040.jpg

    I chose to run the wires through next to the hood release cable as I have a manual and don't have a blank plug where the instructions show (purple wires are the temp sensor the others are for my air compressor).
    20210729_095246.jpg

    And I mounted the sensor to the grille with a self tapping screw.

    20210729_095325.jpg

    The kit comes with pretty detailed instructions on routing the interior wiring.
     
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  12. Jul 29, 2021 at 8:01 PM
    #12
    Taco'09

    Taco'09 Well-Known Member

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    Yes, if you get the right mirror. I have a '14 and did add a second sensor up front dedicated to the mirror but all works well.
     
    tacoman45[QUOTED] likes this.
  13. Jul 30, 2021 at 5:54 AM
    #13
    wmgeorge

    wmgeorge [OP] Well-Known Member

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    Wow thanks for detailed and great posts!

    Yes I have the plug and Yes just ordered, Thank You !!
     
    Last edited: Jul 30, 2021
  14. Jul 30, 2021 at 3:42 PM
    #14
    PzTank

    PzTank Stuck in the Well

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    I did the same mod using a Bob’s mirror and install as @Dm93 about 4 years ago. Bob’s terrific to work with and the install is pretty simple.


    Still can’t believe Toyota would produce a truck without a temp display.

    It’s a must do mod :thumbsup:
     
  15. Jul 31, 2021 at 5:59 AM
    #15
    wmgeorge

    wmgeorge [OP] Well-Known Member

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    Yes to have the wiring cable in and no compass/temp mirror is so stupid. I used to own Chevys before I saw the light. They all had the compass/temp mirror and I loved having. Well I have mine on order, hoping it stays cool so I can get installed.
     
  16. Aug 13, 2021 at 7:28 PM
    #16
    Dm93

    Dm93 Test Don't Guess

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    Just wondering how your install turned out, or have you not gotten around to it yet?
     
  17. Aug 14, 2021 at 5:37 AM
    #17
    wmgeorge

    wmgeorge [OP] Well-Known Member

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    Yes, I got side tracked. The kit is here and the install instructions are great... just need to get some other things out of the way!
     
  18. Aug 14, 2021 at 7:26 AM
    #18
    Dm93

    Dm93 Test Don't Guess

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    Ok, keep us posted.
    I can't remember if the kit came with the heat seal type butt connectors or not but if not I'd reccomend those or solder and heat shrink (sealant type), I soldered mine but not everyone likes to solder.
     
  19. Aug 17, 2021 at 6:08 AM
    #19
    wmgeorge

    wmgeorge [OP] Well-Known Member

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    OK Got Er done, the instructions were great. Install in an hour?? More like 3-4 hours. First you do not need the $14 wire cover it looks fine without it. I plugged in the mirror to the plug in the overhead and just pushed the wires under the lip of the headliner. When removing the cover and handle on the left side, you need a piece of plastic to pry off those screw covers, I used a piece off a Bondo spreader. The screws are 10 mm do not even think about a Phillps, way to tight.

    I followed the hood release cable when going thru the firewall. Used a sharp wood lead pencil to make an access point from the engine bay side and then 1/4 ID nylon tube cut at an 45 degree angle, pushed it thru and then guided the taped purple wires inside the tube. In fact I left the tube in to protect the wires. On the top side of the dash, same type of tube to fish the wires down. I used Top Hat crimp connectors, twist the bare wires together, insert and crimp all done inside the car and then put behind the kick plate.

    The compass is pretty accurate and I did set the zone the thermometer is also right on! A very worth while addition to the truck. Thanks to Dm93 and the rest of the folks.

    Tube.jpg TopHat.jpg
     
  20. Aug 17, 2021 at 8:46 AM
    #20
    jbrnigan

    jbrnigan Well-Known Member

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    FWIW..... Not sure about Scan Gauge, but, one of the parameters measured by the Ultra Gauge is outside ambient air temps.
     

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