1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

A/C on with Defrost

Discussion in '2nd Gen. Tacomas' started by CtryBoyInMT, Mar 26, 2008.

  1. Mar 26, 2008 at 3:52 PM
    #1
    CtryBoyInMT

    CtryBoyInMT [OP] Lifetime Member

    Joined:
    Nov 27, 2007
    Member:
    #3632
    Messages:
    488
    Gender:
    Male
    United States of America
    Vehicle:
    2008 4WD V6 Access Manual TRD Off-Road
    Tinted windows, Rear locker anytime, Secondary filter delete, Parking light activated Fog lights, USA▪Spec Ipod adapter, Map light mod, Relocated 7-Blade, Warn Trans4mer Brushguard & winch, Tire chains, Homelink© installed in headliner, LED lighted 4x4 Switch, Defrost w/o A/C, Heated mirrors, Bilstein 5100's (1.75") & Rear TSB, 50w Reverse lights, Pratt & Whitney PT6A-68, Will this list ever end???
    *** DO YOU OWN A 2009+ TACOMA??? ***
    *** STOP RIGHT NOW AND CLICK THE LINK BELOW!!! *****


    2009+ Owners Click Here
    (I cannot verify the accuracy of the 2009+ Tacoma version)

    So I got bored and wanted to disable the A/C from coming on when selected the mixed(floor/windshield) and windshield only modes on the environmental selector. It kind of sucks to have the heat on in the middle of the winter only to have the A/C turn on and waste MPH.
    So consider this is an Eco-Friendly mod!:D
    After looking at the schematics I found that the green wire from the D3 connector triggered the A/C amplifier to engage the compressor. There is also a separate trigger wire for the manual A/C switch. Bonus!
    Here is how it's done:

    Locate the D3 connector on the defroster servo and remove it.
    AC.jpg

    Remove the white retainer and insert a small piece of wire to release the SOLID Green #3 wire. Not the Green with Black stripe.
    [​IMG]

    AC2.jpg

    Fold it back for safe keeping and tape it up to prevent shorting.
    AC3.jpg

    Then plug it back into the Servo. Don't forget to re-install the white retainer!!
    [​IMG]

    I've tested this for a few days and the A/C will still turn on with the manual A/C button on the environmental control panel.

    --------------------
    Edit:
    There were some questions on how to remove the terminal from the plug (plastic) and I just wanted to clarify for those who have yet to take one part.
    After you remove the white retainer, you still need to insert the helper wire, into the inverted 'T' slot below the square slot, to remove the spring loaded clip still holding the terminal to the plug.

    -----------------
    Edit:
    Fellow TW member rlg0613 suggested a jewelers screwdriver which I didn't even think of.

    ------------
    Edit:
    I added a diagram to clarify this.

    untitled.JPG
    AC1.jpg
     
  2. Mar 26, 2008 at 4:57 PM
    #2
    rlg0613

    rlg0613 Patron Prince

    Joined:
    Jan 20, 2008
    Member:
    #4343
    Messages:
    10
    Gender:
    Male
    First Name:
    Bob
    NC
    Vehicle:
    08 Super White Prerunner SR5 I4 Manual
    Fog Lights
    Neat mod. It would be nice to be able to bring that green wire out to a dash switch. That would allow the A/C to kick on when it's fogging up due to high humidity in the cabin. I know a lot of times in cold weather the problem is the cold windshield, but there are times (even with the heat on) when the A/C helps. Just my un-scientific opinion.

    Bob
     
  3. Mar 26, 2008 at 5:20 PM
    #3
    CtryBoyInMT

    CtryBoyInMT [OP] Lifetime Member

    Joined:
    Nov 27, 2007
    Member:
    #3632
    Messages:
    488
    Gender:
    Male
    United States of America
    Vehicle:
    2008 4WD V6 Access Manual TRD Off-Road
    Tinted windows, Rear locker anytime, Secondary filter delete, Parking light activated Fog lights, USA▪Spec Ipod adapter, Map light mod, Relocated 7-Blade, Warn Trans4mer Brushguard & winch, Tire chains, Homelink© installed in headliner, LED lighted 4x4 Switch, Defrost w/o A/C, Heated mirrors, Bilstein 5100's (1.75") & Rear TSB, 50w Reverse lights, Pratt & Whitney PT6A-68, Will this list ever end???
    You still can, have the heat on and the A/C for the dehumidifying.
    You just press the A/C button.
     
  4. Mar 26, 2008 at 5:55 PM
    #4
    tacomaman06

    tacomaman06 Carolina Alliance: Lead, follow, or get the hell o Thor

    Joined:
    May 1, 2007
    Member:
    #1475
    Messages:
    26,352
    Gender:
    Male
    First Name:
    Will
    York,South Carolina
    Vehicle:
    '13 Silverado ext cab
    nice write up, country boy!! this should be stickied, or put in the cheap mods thread!! good job!!!
     
  5. Mar 26, 2008 at 7:18 PM
    #5
    Roland

    Roland My other ride has sails

    Joined:
    Jan 8, 2008
    Member:
    #4149
    Messages:
    2,408
    Gender:
    Male
    Rhode Island
    Vehicle:
    06 Impulse Red I4 2WD Access Cab
    UnderCover Tonneau, Bed mat, Bug Deflector, aFe Pro Dry S, Secondary Air Filter removed, Synthetic 5W-30 oil, Scanguage II with blendmount, WeatherTech floorliners, Toyota seat covers, Installed OEM intermittent wipers, TacomaWorld sticker, Defrost without AC mod, Hidden Hitch
    WOOT! I've been waiting for someone to find a way to do this!
    + to rep for being a genius!
     
  6. Mar 27, 2008 at 12:18 AM
    #6
    CtryBoyInMT

    CtryBoyInMT [OP] Lifetime Member

    Joined:
    Nov 27, 2007
    Member:
    #3632
    Messages:
    488
    Gender:
    Male
    United States of America
    Vehicle:
    2008 4WD V6 Access Manual TRD Off-Road
    Tinted windows, Rear locker anytime, Secondary filter delete, Parking light activated Fog lights, USA▪Spec Ipod adapter, Map light mod, Relocated 7-Blade, Warn Trans4mer Brushguard & winch, Tire chains, Homelink© installed in headliner, LED lighted 4x4 Switch, Defrost w/o A/C, Heated mirrors, Bilstein 5100's (1.75") & Rear TSB, 50w Reverse lights, Pratt & Whitney PT6A-68, Will this list ever end???
    If anyone wants to recommend this as a Sticky or added to PT's list, feel free to nominate.
    I'm just sharing some helpful things I've found.
    I'm just to modest to nominate myself!
     
  7. Mar 27, 2008 at 4:39 AM
    #7
    rlg0613

    rlg0613 Patron Prince

    Joined:
    Jan 20, 2008
    Member:
    #4343
    Messages:
    10
    Gender:
    Male
    First Name:
    Bob
    NC
    Vehicle:
    08 Super White Prerunner SR5 I4 Manual
    Fog Lights
    Doh! It was a long day, my brain wasn't in gear...
     
  8. Mar 27, 2008 at 6:48 AM
    #8
    ETAV8R

    ETAV8R 4th MAW

    Joined:
    Feb 20, 2008
    Member:
    #4832
    Messages:
    1,273
    Gender:
    Male
    Republik of Kalifornia
    Vehicle:
    MGM 09 AC 4WD V6 TRD-OR w/ 2013 FWC Finch
    Grillcraft, Demello Sliders, OME Front and Rear suspension
    Awesome find. Looks fairly simple to do. I was bummed when toyota first decided to activate A/C when defrost is on. Most defrosters work with heat not a/c. Whats the deal?
     
  9. Mar 27, 2008 at 9:51 AM
    #9
    nd

    nd Radical Town. It's a hell of a place!

    Joined:
    Mar 12, 2007
    Member:
    #1047
    Messages:
    12,738
    Gender:
    Male
    First Name:
    Nate
    Greenville, SC
    Vehicle:
    07 TRD Off-Road 4x4 debadged
    De badged, 5100's, Black Toyota Baja wheels
    you get some rep for that one ctryboy! too bad i'm afraid to touch the wiring on my truck.... who wants to do it for me?
     
  10. Mar 27, 2008 at 10:05 AM
    #10
    mvega1969

    mvega1969 Well-Known Member

    Joined:
    Nov 15, 2007
    Member:
    #3469
    Messages:
    612
    Gender:
    Male
    Laredo
    Vehicle:
    SILVER 08 TACOMA DC LB 4X4 TRD Sprt Pkg, Side
    ndcouch, that is not ignorance (compliment) is your way of doing things, lazy boy, easier for you open your windows and that will defrost even your wettest ideas, that is if you have the pw if not burn baby burn, hot and humid.
     
  11. Mar 27, 2008 at 11:18 AM
    #11
    nd

    nd Radical Town. It's a hell of a place!

    Joined:
    Mar 12, 2007
    Member:
    #1047
    Messages:
    12,738
    Gender:
    Male
    First Name:
    Nate
    Greenville, SC
    Vehicle:
    07 TRD Off-Road 4x4 debadged
    De badged, 5100's, Black Toyota Baja wheels
    Dan? is that you?
     
  12. Mar 27, 2008 at 7:24 PM
    #12
    piercedtiger

    piercedtiger Devout Atheist

    Joined:
    Oct 29, 2007
    Member:
    #3284
    Messages:
    6,361
    Gender:
    Male
    First Name:
    Jon
    B.F.E., NY
    Vehicle:
    06 TRD OR DC SB 6SPD
    Bestop canopy, hood struts, relocated 7-pin, 3" Toytec spacer/AAL, 265/75 16 Yokohama Geolander ATS, Hi-Lift mounted in bed, fog light mod, turn signal mod, locker mod, driver seat mag light mount, step bars, reinforced tailgate, ABS kill switch, black grill surround, bed lights, Brute Force front
    Added to the T.O.C. :D
     
  13. Apr 8, 2008 at 9:09 AM
    #13
    carriggjr

    carriggjr New Member

    Joined:
    Feb 25, 2008
    Member:
    #4945
    Messages:
    2
    Vehicle:
    2006 Tacoma TRD
    Ok, so what panel did you find the connector behind, and how does it come loose?
     
  14. Apr 8, 2008 at 9:53 PM
    #14
    CtryBoyInMT

    CtryBoyInMT [OP] Lifetime Member

    Joined:
    Nov 27, 2007
    Member:
    #3632
    Messages:
    488
    Gender:
    Male
    United States of America
    Vehicle:
    2008 4WD V6 Access Manual TRD Off-Road
    Tinted windows, Rear locker anytime, Secondary filter delete, Parking light activated Fog lights, USA▪Spec Ipod adapter, Map light mod, Relocated 7-Blade, Warn Trans4mer Brushguard & winch, Tire chains, Homelink© installed in headliner, LED lighted 4x4 Switch, Defrost w/o A/C, Heated mirrors, Bilstein 5100's (1.75") & Rear TSB, 50w Reverse lights, Pratt & Whitney PT6A-68, Will this list ever end???
    The only thing you need to remove is the glove box. Push in on the two limit stops holding it and lift the box off the hinge. The First picture is taken from the passenger seat looking toward the center of the dash through the opening left from removing the glove box.

    Edit: Just about forgot... If you still have that pathetic waste of a shock on the glove box, you need to remove that, too!
     
  15. Apr 8, 2008 at 10:02 PM
    #15
    gdawg25

    gdawg25 Zoom-Zoom

    Joined:
    Oct 25, 2006
    Member:
    #136
    Messages:
    1,030
    Gender:
    Male
    Victoria, BC
    Vehicle:
    '08 Mazdaspeed 3
    So you are telling me the AC comes on when I select defrost (windshield)?
     
  16. Apr 8, 2008 at 10:31 PM
    #16
    CtryBoyInMT

    CtryBoyInMT [OP] Lifetime Member

    Joined:
    Nov 27, 2007
    Member:
    #3632
    Messages:
    488
    Gender:
    Male
    United States of America
    Vehicle:
    2008 4WD V6 Access Manual TRD Off-Road
    Tinted windows, Rear locker anytime, Secondary filter delete, Parking light activated Fog lights, USA▪Spec Ipod adapter, Map light mod, Relocated 7-Blade, Warn Trans4mer Brushguard & winch, Tire chains, Homelink© installed in headliner, LED lighted 4x4 Switch, Defrost w/o A/C, Heated mirrors, Bilstein 5100's (1.75") & Rear TSB, 50w Reverse lights, Pratt & Whitney PT6A-68, Will this list ever end???
    If you have Air Conditioning, yes.
    When the environmental selector is set to either Floor/Windshield mix or Windshield only, the A/C compressor is triggered. The inlet air runs through the A/C condenser before it is ran through the heater core and delivered to the system.
    The engineering thought process behind this layout is to "dry" the incoming air, reducing the fog buildup on the windshield.
    In all justification, this process is sometimes needed on humid days when the windshield is cool and the incoming moisture condenses on the windshield (creating fog). Once the windshield is warm enough, this "Drying" is no longer needed. Unfortunately the system cannot detect this and continues to run the A/C system.

    We 'Smarter than the average human' Tacoma owners do not need this.:D
    We will immediately recognize this situation, therefore taking the appropriate corrective action and push the A/C button.
    Likewise, when no longer needed, we can opt to de-select the A/C function reducing the drag on the engine and increasing power and fuel economy.
     
  17. Apr 8, 2008 at 10:36 PM
    #17
    gdawg25

    gdawg25 Zoom-Zoom

    Joined:
    Oct 25, 2006
    Member:
    #136
    Messages:
    1,030
    Gender:
    Male
    Victoria, BC
    Vehicle:
    '08 Mazdaspeed 3
    Hmmm, I did not know this. Good info. However, I don't see why in the hell I would need this. I live in the driest damn place on the face of the earth. What's humidity?
     
  18. Apr 9, 2008 at 2:17 AM
    #18
    gp4camping

    gp4camping Active Member

    Joined:
    Apr 8, 2008
    Member:
    #5840
    Messages:
    35
    Gender:
    Male
    virginia
    Vehicle:
    08 4x4 TRD off-road package
    overhead dvd monitor and player, ipod adaptor, vent visors, reverse sensors, running boards, bed extender
    countryboy, that is very interesting, what is the year of your truck? I'm wondering if this is the same for an 08 tacoma? Anybody done this on an 08?
     
  19. Apr 9, 2008 at 4:53 AM
    #19
    rlg0613

    rlg0613 Patron Prince

    Joined:
    Jan 20, 2008
    Member:
    #4343
    Messages:
    10
    Gender:
    Male
    First Name:
    Bob
    NC
    Vehicle:
    08 Super White Prerunner SR5 I4 Manual
    Fog Lights
    I did my '08 Prerunner about a week ago. It's been pretty rainy here and I have had to turn on the A/C only once and for only about 30 seconds. The front and back windows cleared and I went back to Eco-Friendly driving.

    No joke - this is a HP boost mod!
     
  20. Apr 9, 2008 at 5:04 AM
    #20
    Roland

    Roland My other ride has sails

    Joined:
    Jan 8, 2008
    Member:
    #4149
    Messages:
    2,408
    Gender:
    Male
    Rhode Island
    Vehicle:
    06 Impulse Red I4 2WD Access Cab
    UnderCover Tonneau, Bed mat, Bug Deflector, aFe Pro Dry S, Secondary Air Filter removed, Synthetic 5W-30 oil, Scanguage II with blendmount, WeatherTech floorliners, Toyota seat covers, Installed OEM intermittent wipers, TacomaWorld sticker, Defrost without AC mod, Hidden Hitch
    It whould be the same on all the second generation trucks.
     
To Top