02 HVAC swapped with 05+ auto HVAC

Loomin · 11-23-2008, 04:37 AM

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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vatorn10 · 11-23-2008, 02:17 PM

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.

Loomin · 11-23-2008, 03:25 PM

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.

02WRX"monster" · 11-24-2008, 07:42 AM

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

2:43AM · 11-24-2008, 08:27 AM

^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.

Loomin · 11-26-2008, 01:17 AM

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.

mannyOlicious · 11-26-2008, 02:23 AM

subscribed... lets see pics!!!

02WRX"monster" · 11-26-2008, 07:15 AM

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

Loomin · 11-27-2008, 04:14 AM

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....

2:43AM · 12-04-2008, 02:34 PM

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.

Jack · 12-04-2008, 05:02 PM

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

wopdeeze · 12-12-2008, 04:07 AM

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.

Loomin · 01-03-2009, 10:57 PM

Quote:

Originally Posted by wopdeeze

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.

TyroneBiggums · 01-03-2009, 10:59 PM

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

Loomin · 01-04-2009, 04:22 AM

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

11-23-2008, 04:37 AM	#1
Loomin Scooby Guru Member#: 118113 Join Date: Jun 2006 Chapter/Region: VIC Vehicle: 98' Stagea 260RS Autech Ver.	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. * Registered users of the site do not see these ads.

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11-23-2008, 02:17 PM	#2
vatorn10 Scooby Specialist Member#: 124724 Join Date: Sep 2006 Chapter/Region: TXIC Location: Dallas Tx :(RvA Vehicle: 21 Crosstrek	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.

11-23-2008, 03:25 PM	#3
Loomin Scooby Guru Member#: 118113 Join Date: Jun 2006 Chapter/Region: VIC Vehicle: 98' Stagea 260RS Autech Ver.	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.

11-24-2008, 07:42 AM	#4
02WRX"monster" Scooby Newbie Member#: 173100 Join Date: Feb 2008 Chapter/Region: South East Location: Clinton, TN Vehicle: 2002 WRX Blue	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

11-24-2008, 08:27 AM	#5
2:43AM Scooby Specialist Member#: 190273 Join Date: Sep 2008 Chapter/Region: SWIC Location: PHX Vehicle: 05 WRX evoIII-16G WRB	^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.

11-26-2008, 01:17 AM	#6
Loomin Scooby Guru Member#: 118113 Join Date: Jun 2006 Chapter/Region: VIC Vehicle: 98' Stagea 260RS Autech Ver.	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.

11-26-2008, 02:23 AM	#7
mannyOlicious * Banned * Member#: 173829 Join Date: Mar 2008 Chapter/Region: SCIC Location: Irvine, CA Vehicle: 04 dom3 +meth pyah 09 triumph daytona 675	subscribed... lets see pics!!!

11-26-2008, 07:15 AM	#8
02WRX"monster" Scooby Newbie Member#: 173100 Join Date: Feb 2008 Chapter/Region: South East Location: Clinton, TN Vehicle: 2002 WRX Blue	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

11-27-2008, 04:14 AM	#9
Loomin Scooby Guru Member#: 118113 Join Date: Jun 2006 Chapter/Region: VIC Vehicle: 98' Stagea 260RS Autech Ver.	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....

12-04-2008, 02:34 PM	#10
2:43AM Scooby Specialist Member#: 190273 Join Date: Sep 2008 Chapter/Region: SWIC Location: PHX Vehicle: 05 WRX evoIII-16G WRB	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.

12-04-2008, 05:02 PM	#11
Jack Add Lightness Moderator Member#: 13699 Join Date: Dec 2001 Chapter/Region: NESIC Location: Hopkinton, MA Vehicle: 2021 Building It Better	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

12-12-2008, 04:07 AM	#12
wopdeeze Scooby Specialist Member#: 148597 Join Date: May 2007 Location: Yokosuka Japan Vehicle: 85 911 White	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.

01-03-2009, 10:59 PM	#14
TyroneBiggums * Banned * Member#: 191182 Join Date: Oct 2008 Chapter/Region: Tri-State Location: Tri-State Vehicle: 2002 WRX MBP	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

01-04-2009, 04:22 AM	#15
Loomin Scooby Guru Member#: 118113 Join Date: Jun 2006 Chapter/Region: VIC Vehicle: 98' Stagea 260RS Autech Ver.	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