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AC acting very strange!

Discussion in '2nd Gen. Tacomas' started by spadresurfer91, Aug 11, 2009.

  1. Aug 11, 2009 at 2:49 PM
    #1
    spadresurfer91

    spadresurfer91 [OP] Active Member

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    my Air conditioner is acting really weird...the only time it works is when the fan speed is set too high...when its on high the ac blows really cold and very hard.... so i went to my toyota dealership and they want to charge me 100 bucks to diagnose so i figured i would at least ask too see if anyone had any ideas that i could work on myself.. Thank you in advance for anything
     
  2. Aug 11, 2009 at 3:14 PM
    #2
    Raylo

    Raylo Well-Known Member

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    It sounds like your HVAC switch assembly. To get the a/c compressor to engage you need to have the a/c button pushed and the blower on. For some reason it sounds like the contacts in the fan controller are not making unless the switch is all the way on high. I have attached the a/c schematic for reference....
     

    Attached Files:

  3. Aug 11, 2009 at 3:45 PM
    #3
    98tacoma27

    98tacoma27 :POOPCORN: Thor

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    Are you saying you only have one speed on the blower?

    If you only have one speed (high) then the blower motor resistor is bad.
     
  4. Aug 11, 2009 at 4:06 PM
    #4
    spadresurfer91

    spadresurfer91 [OP] Active Member

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    so what can i do about the resistor? is this easy to fix myself?
     
  5. Aug 11, 2009 at 4:35 PM
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    Raylo

    Raylo Well-Known Member

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    I haven't done it on a Tacoma but it is easy as getting to the resistor module, removing and plugging in the new one.. if that is the issue. So does the blower run at all in the lower speeds or not? What about in vent or heat mode? IOW when in a/c is the blower running and blowing warm in the lower speeds or is it not blowing at all in the lower speeds?? Those are important questions.
     
  6. Aug 11, 2009 at 5:14 PM
    #6
    spadresurfer91

    spadresurfer91 [OP] Active Member

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    in the lower speeds it isn't running at all..no fan.. and completely silent... so i could potentially go buy a resistor?
     
  7. Aug 11, 2009 at 5:18 PM
    #7
    spadresurfer91

    spadresurfer91 [OP] Active Member

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    a few weeks ago it would work in the lower fan speeds but it never lasted for more then a few minutes....it would work then stop and a few hours later it would work again for a few minutes then stop...
     
  8. Aug 11, 2009 at 5:21 PM
    #8
    Raylo

    Raylo Well-Known Member

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    That def sounds like the resistor. Pretty common issue. It is component B4 in the schematic and is right behind the blower control panel. That just pops out, although care needs to be taken so as not to break it. I can't tell from the picture (on the component location drawing on TTORA FSM page) if it is attached to the panel or in the harness behind but it shouldn't be hard to replace. If you had the new one you would be able to ID the one in the truck and just swap it out.
     
  9. Aug 11, 2009 at 5:29 PM
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    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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  10. Aug 11, 2009 at 5:32 PM
    #10
    spadresurfer91

    spadresurfer91 [OP] Active Member

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    Thank you guys so much, really helpful. Cant say thank you enough.
     
  11. Aug 11, 2009 at 5:33 PM
    #11
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    :)
     
  12. Aug 14, 2009 at 1:46 PM
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    spadresurfer91

    spadresurfer91 [OP] Active Member

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    So i ordered the part from my dealership and it came in today but i am having trouble finding exactly where it goes. I took out my glovebox but am having trouble locating the existing resistor. Anybody have any experience with this?
     
  13. Aug 14, 2009 at 1:51 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    In that FSM page I listed, it looks like the resistor is above the filter.....You have to remove the blower motor, and the filter, and you should be able to access it from undernieth.
     
  14. Aug 14, 2009 at 2:12 PM
    #14
    spadresurfer91

    spadresurfer91 [OP] Active Member

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    i figured it out.... you dont actually have to remove anything you can see it from the flooboard. Thank you again!
     
  15. Aug 14, 2009 at 5:59 PM
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    surfsupl

    surfsupl Well-Known Member

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    and did this solve your problem w/the a/c?
     
  16. Sep 2, 2009 at 10:00 PM
    #16
    Silver06Taco

    Silver06Taco Well-Known Member

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    Yeah...did this solve the problem? I'm having pretty much the same issue with mine. No matter what setting it's on, the fan only seems to work when on high.

    Also...how much was the part? Do you have the part number? I'll look on the pdf's that were posted too.
     
  17. Sep 3, 2009 at 10:17 AM
    #17
    lizard1

    lizard1 Well-Known Member

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    My a/c fan only blew on high and the fix was the faulty resistor. Under warranty (30k) so no charge
     
  18. Sep 6, 2009 at 3:07 PM
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    spadresurfer91

    spadresurfer91 [OP] Active Member

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    yes this fixed my problem perfectly. It happened on any setting on mine as well. the part cost me $51 and the part number was 87138-04050. I ended up just ordering it from my dealership because none of the car parts stores in my city had it in stock. i dont have my truck with me right now but the resistor is very easily found just by lying on your back in the passenger seat floor and looking up. its held in place by two bolts and you will be able to recognize the plastic bracket its on once you have the new part. Very easy to replace took a total of 2 minutes.
     
  19. Sep 7, 2009 at 1:09 AM
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    Silver06Taco

    Silver06Taco Well-Known Member

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    I ordered the part on Friday and should be able to pick it up on Tuesday. I hope it fixes it. The part here was $31 plus tax.
     
  20. Dec 31, 2010 at 9:18 PM
    #20
    seanmccarthy1

    seanmccarthy1 Member

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    same problem resistor went to dealer 30.00 bucks easy , easy fix. But did blow again in a few months the resistor that is.....
     
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