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Old 11-23-2008, 04:37 AM   #1
Loomin
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Join Date: Jun 2006
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98' Stagea 260RS
Autech Ver.

Default 02 HVAC swapped with 05+ auto HVAC

Im installing 05+ STI auto HVAC into my 02 WRX. I SEARCHED THROUGH OVER 400 THREADS READING UP ON THIS:

YES it can be done
YES it requires effort.

you need to remove EVERYTHING from the dashboard including the dash cover its self. its alot to remove.

Drain the coolant
Discharge the A/C (do it properly for the sake of our ozone)

I have the following parts:

complete 05+ STI center console
05+ auto HVAC control panel ( knobs and buttons)
05+ auto HVAC Heater core and A/C evaporator assembly with servos
the appropriate plugs that connect to the above units.
Making my own wiring harness



I have 2 questions:

1) is there anything else needed? i heard something about a sunlight load sensor and also something about a "control module" is there any other components i need? special module boxes that may be hidded beneath the dash? Maybe the STI blower motor?

2) Does anyone have a wiring diagram for these components? < i really really really need this.....


when finished i will publish a full how-to on this subject but i need a bit of help.
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Old 11-23-2008, 02:17 PM   #2
vatorn10
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im tryin to do the same. i would like to do the s204 dash kit but its a bit pricey. you can go to a local subaru dealership and at the parts department ask for a wiring schematic for the blower motor assy.

i have seen some really nice swaps and im a huge fan of the end result. i havent seen a right-up or a sticky about this conversion yet though.
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Old 11-23-2008, 03:25 PM   #3
Loomin
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awesome man, id really love to get this working. im gonna pull apart my dash right now and see how the OEM wiring looks.


ill call my dealer tmrw and get both the 02 and 05 diagrams and post them on here.
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Old 11-24-2008, 07:42 AM   #4
02WRX"monster"
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I have been researching on this same swap and there is a sun load sensor that goes on the dash where the defrost vents come out and also the is a outside temp sensor that goes in the front of the car like in the grill i think i have the schematic somewhere ill try to find it
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Old 11-24-2008, 08:27 AM   #5
2:43AM
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^You are correct. Sun sensor on the dash, right in the middle and also an outside temp probe. I love my auto HVAC...of course, mine came with it! Good luck with your conversion!

Try this schematic (2004, pg3): http://www.autocds.ru/2004%20STI/07....g%20System.pdf

It's from an 04, but it's probably the same.
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Old 11-26-2008, 01:17 AM   #6
Loomin
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Thanks for the info guys! ive got both wiring diagrams now and im in the process of either trying to find a harness i can buy that will work for me, or just trying to make my own.
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Old 11-26-2008, 02:23 AM   #7
mannyOlicious
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subscribed... lets see pics!!!
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Old 11-26-2008, 07:15 AM   #8
02WRX"monster"
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i contacted millennium auto (www.y2kimports.com) when i was researching doing the swap in my bugeye and the said they would sell dash harnesses for something like $30 so i would check with them that might make the swap easier
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Old 11-27-2008, 04:14 AM   #9
Loomin
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ok so upon hours of further research, ive concluded that the 02 and 05 ECU's are not compatable. the 05 ECU has 5 plugs with a total of 88 pins. the 02 has 5 different shaped plugs with 120+ pins. not one plug is the same between the two cars. now some of the pins are unused so i even counted the number of wires on all of my plugs. there are 93 IIRC. The 04+ STI's have only 4 plugs but they each have MANY more wires. so long story short: id need some kind of wacky conversion harness.

im almost positive they made a JDM WRX with auto climate controls in 01-02 (bugeye years in japan) but the harness would be RHD and almost unusable in a LHD car.

im wiring it all up my self. ive made my own pin out chart which i will post once its tested and working properly.

pics to come soon....
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Old 12-04-2008, 02:34 PM   #10
2:43AM
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Keep us posted on your progress. Looks like you're on the right track and research and careful planning is helping you sort it all out.
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Old 12-04-2008, 05:02 PM   #11
Jack
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Wow. Sounds like a ton of work.

If I were able to swap out my LGT's auto for a manual system easily, I'd do it in a second. I love the manual system in the wife's base outback and the LGT auto one is a pain in the butt that I have to constantly play with for it to just do what I want.

jack
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Old 12-12-2008, 04:07 AM   #12
wopdeeze
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you are correct all GDA-GDB Bugeyes had auto hvac, only one that didnt was spec c ra anyways do you have a wiring diagram for the hvac? i just installed a new cluster and it messes with my outside air temp because it is made for a spec c with manual ac.
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Old 01-03-2009, 10:57 PM   #13
Loomin
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Quote:
Originally Posted by wopdeeze View Post
you are correct all GDA-GDB Bugeyes had auto hvac, only one that didnt was spec c ra anyways do you have a wiring diagram for the hvac? i just installed a new cluster and it messes with my outside air temp because it is made for a spec c with manual ac.
you can find them quite easily online. i may have the instrument cluster diagram. ill pm it to you if you need it.
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Old 01-03-2009, 10:59 PM   #14
TyroneBiggums
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I have a HVAC control panel with the auto if anyone wants to buy it. real cheap. pm me
got sent the wrong part a while back and its just sitting in my room
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Old 01-04-2009, 04:22 AM   #15
Loomin
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i have a complete 04 sti center console for sale including shifter trim ring. i also have an 02 heatercore and manual HVAC system for sale... includes blower.


all for $100! + shipping
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