Climate control wiring Options

[Cavegod]

Hi all i am curently installing cauto climate control in to a non climate control car so thats climate control out of a 1994 jdm Gen6 Celica st202 and installing it into a 1997 uk Gen6 gt st202.

does anybody know where to get a wiring diagram for the auto climate control system as i can only find one for a Gen5 st182 celica.

heres hoping

Pete

[Cavegod]

Has nobody got a wiring diagram??

[njccmd2002]

check the wiki in the celica club uk, i think there is a how to

[Cavegod]

nope the wiki is no good i am fitting auto climate control not the normal aircon.

[Rusty]

as the guy on said in your thread on celica club uk, your properly the first, so umm good luck

[trdproven]

You would be the first known

[Cavegod]

sorted it just need to figure out one wire but the system works without it,

its a green/red wire and i seem to remeber it going to the cor and according to the wiring for my celica it then goes to the diagnostic port so maybe the a/c has fault codes?

[Rusty]

yeah I remember reading something about the climate control has its own OBD, so it flashes lights if something's wrong

[Batman722]

I can post up the 95 and 97 USDM versions if you want...there might be some differences with the UK version though.

[Cavegod]

I can post up the 95 and 97 USDM versions if you want...there might be some differences with the UK version though.

if you have them that would be great thanks!!

[Rusty]

PM me your email, I have the wiring for a ST202, might be on there

[Cavegod]

ok the climate control is fitted and i have just 1 wire to connect, green/red wire no idea what its for and i have no diagrams to help me out either. i can't believe there is no info on the auto system, i have got a diagram for the Gen5 auto systems but nothing for the Gen6 system any help with this one wire will be greatly recieved.

[Cavegod]

if anybody has there car in bits can you check 2 wires for me?

i need to know for sure that the orange wire (bottom left) from the left plug of three (black) on the heater box goes to the blue plug on the right above the centre vents, should hopefully go into a blue connector block with 3 oramge and a few brown wires.

also i need to know where the green/red wire (next to a grey wire) from the bottom row on the centre white plug goes to.

[trdproven]

You complete this successfully, you got yourself a certified sticky if you provide the info.

[Cavegod]

i can't believe that a wiring diagram for climate control don't exist!!

just one wire to connect and know way to find out what it does without another climate control car to look at.

[trdproven]

cave - what is working so far on the CC what is functional and what is that 1 wire do? or what is not working

[Cavegod]

everything works but the wire must do something otherwise it wouldn't have it, i was looking at the wiring for the gen5 climate control and that has a battery wire to the A/C auto amp, also checking the gen6 diagrams on celicatech all the green/red wires are battery lives. i have not connected a battery live to the system but maybe this wire is for battery? only way to find out is if somebody with auto climate checks that the wire has 12v constant with ignition off, but getting somebody to remove a bit of dash trim to do it aint easy.

[Culpable04]

everything works but the wire must do something otherwise it wouldn't have it, i was looking at the wiring for the gen5 climate control and that has a battery wire to the A/C auto amp, also checking the gen6 diagrams on celicatech all the green/red wires are battery lives. i have not connected a battery live to the system but maybe this wire is for battery? only way to find out is if somebody with auto climate checks that the wire has 12v constant with ignition off, but getting somebody to remove a bit of dash trim to do it aint easy.

would you mind posting how you got it to work ?

most of us the in US don't have the parts needed for a modification like this, but it'd be good to hanve for those few who do have the parts/

[Cavegod]

yep parts required if you don't have A/C at all like i didn't

1.A/c compressor & drive belt + pulley if different
2.A/c radiator
3.A/c fan
4.3 relays out of the relay box next to Alternator
5.A/c pipes from engine bay
6.Climate control control box
7.A/c box (behind glovebox)
8.Heater box behind dashboard in the centre
9.all wiring from the control box to the blower relay
10.thermistors A/c rad, Dashboard below steering wheel next to left knee uk and right knee usa
11.Solar senor top of dash

think thats all of it for the most part the wiring should already be in the car for normal A/C check for 2 plugs in passenger footwell 1 behind carpet and 1 above the blower ducting, in the engine bay there should be an unused plug near the ignitor with a blanking plug pushed into it, and 1 near where the compressor goes and 1 next to the top of the radiator near the relay box.

hope this helps.

a few pics









full thread here

http://www.celica-club.co.uk/forum/index.p...2128&st=100




This post has been edited by Cavegod: Jul 29, 2009 - 12:27 PM

[Rusty]

and can I just say climate control is cool

just set it to the temperature you want and it will keep adjusting itself to keep that temperature.

I dont know why not many people have done this?? (well about from a little work )

[trdproven]

thats a lot of work but Im sure itll pay off once it is working right

[Cavegod]

yep just wish somebody with Climate control would check 2 wires for me

[Rusty]

ok i'll try but I aint taking all my dash apart, what wires and where?

[Cavegod]

Cheers Rusty, you will need to remove the trim around gearstick (just unclips at the back then the front, the trim around heater and stereo 2 screws at the bottom then just pull from bottom, remove the heater controls 2 screws and unclip the plugs at the back.

the wires i need to know about are as follows.

behind the heater control and lower down are three multiplugs attached to the heater box from left to right they are Black, white, grey. may be opposite if left hand drive.

on the black plug on the bottom row there is an orange wire i need to make sure this has continuity to the orange wires on the blue plug above and to the right(RHD) of the centre vents.

on the middle white plug i need to know if the green/red wire bottom row next to a grey wire has 12v with ignition off and also the grey wire next to it has 12v with ignition on and 0v with ignition off.

many thanks if you do this for me.

[Cavegod]

right all done and wired in just need to refill the gas and voila ice cold air for our tropical uk climate!!

[Culpable04]

right all done and wired in just need to refill the gas and voila ice cold air for our tropical uk climate!!

Nice, now can you tell us a quick run down on this ?

what were those to wires ? where do they go ? so we can have this documented and make it easier for those who may try it later.

[Cavegod]

once you plug all the sensors and wiring plugs in you are left with a few wires

white/black x 2 these are earthsanywhere on the car body work

grey ignition live

yellow/red pressure sensor connect to the cars wire for the snesor.

orange- speed sensor, block connector in middle of dash behind and above the central vent, its a blue block connector on the right

green/red- battery live

blue/yellow relay earth for the fans/compressor just unclip both the cars and the CC wires discard the cc wire and push the cars wire into the block connector

blue/white heater relay same here just use the cars wire and swap it for the cc wire

thats it the rest of the wires x6 go to the thermistors

then just plug every thing else in.

hope this helps!

[BloodyStupidDave...]

Congrats on getting it all working. I started an ac to climate conversion on mine some time ago and have everything working except the actual aircon now. Must revisit it at some point and figure out the last step.

This post has been edited by BloodyStupidDavey: Aug 16, 2009 - 5:44 AM

[Rusty]

Cheers Rusty, you will need to remove the trim around gearstick (just unclips at the back then the front, the trim around heater and stereo 2 screws at the bottom then just pull from bottom, remove the heater controls 2 screws and unclip the plugs at the back.

the wires i need to know about are as follows.

behind the heater control and lower down are three multiplugs attached to the heater box from left to right they are Black, white, grey. may be opposite if left hand drive.

on the black plug on the bottom row there is an orange wire i need to make sure this has continuity to the orange wires on the blue plug above and to the right(RHD) of the centre vents.

on the middle white plug i need to know if the green/red wire bottom row next to a grey wire has 12v with ignition off and also the grey wire next to it has 12v with ignition on and 0v with ignition off.

many thanks if you do this for me.

right first off sorry for not getting back to you sooner, I had a look around, I tryed to followed the wires (which go up in one lot) and I cant see where they go
got a couple of pictures dont think they'll help you though, but from the looks of your previous post you might already have it.

(sorry the loose wires, USB wire & that funny looking black right angle thing are a plug and play for my headunit)




http://www.toyodiy.com/parts/p_J_1996_TOYO...MVF_8715.4.html
just wondering did you have to wire those up or are they not part of it?




I also found the bulb I need to replace for the fan speed (lower left bulb) I went on toyodiy 84999-10530 that seem right to you guys?

This post has been edited by Rusty: Aug 14, 2009 - 8:12 PM

[BloodyStupidDave...]

from the looks of your previous post you might already have it.

Yes I was under that impression also. Please let me know if you need any further diagnositcs or wires tracing. I have the centre console and glove box removed at the moment so would be very easy for me to do.

[Cavegod]

cheers rusty but by the looks of your climate control it is the wrong type as mine has 2 wiring plugs on the back of it, hence why you could find the wires.

BSD

if your system has the 2 orange plugs then there is only one wire i need to know for sure.

behind the heater control and lower down are three multiplugs attached to the heater box from left to right they are Black, white, grey. may be opposite if left hand drive.

on the black plug on the bottom row there is an orange wire i need to make sure this has continuity to the orange wires on the blue plug above and to the right(RHD) of the centre vents.


on rusty's pictures you can just see the white plug behind the mass of loose wires from his stereo, on the 2 orange plug system there are 3 plugs there.

also the place the orange wire should go is above the stereo and central vents near the windscreen you will see the blue connector block on the right(UK)

[BloodyStupidDave...]

on the black plug on the bottom row there is an orange wire i need to make sure this has continuity to the orange wires on the blue plug above and to the right(RHD) of the centre vents.

It does. The wire runs up to that junction block and has its own pin. There is also a splice in that wire, about 150mm before the blue junction block. The spliced wire runs off to the passenger footwell on my RHD car. I forget where it goes after that but have some notes somewhere if you can't work it out.

on the middle white plug i need to know if the green/red wire bottom row next to a grey wire has 12v with ignition off and also the grey wire next to it has 12v with ignition on and 0v with ignition off.

The grey wire is ACC. It is 0v with ignition off and 12v with the key in the ACC or IG (I) positions. From memory it is N/C with they key in the ST(II) position but that's not imporant. I don't recall if it connects to ACC before or after the cig&radio fuse but could find out for you if needed.

The green/red wire is ECU-B. It is constant 12v and goes to the fused side of the 15A ECU-B fuse. Again, if you want to know exactly where the wire *should* terminate (as oppsoed to just splicing it into any convenient ECU-B wire) let me know and I'll try to find my notes.

Rusty: Yup, you do need all three of those sensors. From previous posts, it sounds like cavegod has them.

This post has been edited by BloodyStupidDavey: Aug 15, 2009 - 8:20 AM

[Cavegod]

Cheers BSD so i have wired it correctly, i just used the easiest 12v perm live i could find.

anyway got the system gassed to day for free (read my thread on ccuk) and i now have ice cold air!!!

thanks to all who have helped me install this system.

next mod is gt4 front end conversion.

[BloodyStupidDave...]

Cheers BSD so i have wired it correctly, i just used the easiest 12v perm live i could find.

anyway got the system gassed to day for free (read my thread on ccuk) and i now have ice cold air!!!

thanks to all who have helped me install this system.

next mod is gt4 front end conversion.

Awesome news! Now, any idea why my air con doesn't work? The light comes on for both the ac and eco positions but I can't hear any relays clicking (not sure if I should). All other functions work.

I have two wires unconnected. There is a little black plug under the aircon blower. Among others, it has a yellow wire and a blue/yellow wire.

I believe the blue/yellow goes to the ECU - but which pin? I think it is either C22.17 [ATS] (if the other end goes to ac amp) or F12.2 [CF] (if other end goes to engine bay).

Where does the yellow wire from that same plug go?

Does the ACA function of the ECU need to be connected to something?

[Cavegod]

with engine running, look at the compressor and see if the centre is stationary? if so press the A/C button and then look and see if it is spinning?

if not, remove the pressure switch plug and connect the two terminals together yellow/red+ purple white does that do the trick?

oh BSD could you tell me where the pink/blue wires goes? it is spliced to the pink/blue wire from the auto amp to the ac amp?

[BloodyStupidDave...]

with engine running, look at the compressor and see if the centre is stationary? if so press the A/C button and then look and see if it is spinning?

if not, remove the pressure switch plug and connect the two terminals together yellow/red+ purple white does that do the trick?

oh BSD could you tell me where the pink/blue wires goes? it is spliced to the pink/blue wire from the auto amp to the ac amp?

The centre is always stationary. Is the pressure switch this? http://img.photobucket.com/albums/v79/cave...hoto-0001-1.jpg I think my wiring colours are different. It is getting too dark to try now so will look at this tomorrow morning.

The pink/blue from the A/C amp goes to the black plug at the bottom of the centre console. The pink/green from the A/C amp also goes to the black plug (adjacent pins). From the black plug the colours change. The wires go to the heater mixer actuator by the driver's left foot (for RHD cars; passenger's left foot on LHD cars).


This post has been edited by BloodyStupidDavey: Aug 16, 2009 - 5:38 AM

[Cavegod]

yep thats the pressur switch just conect the opposite wires together the outer two are to turn the fans of when air con aint fitted. if the centre of the clutch aint spinning there will be no cold air, connecting the pressure switch will cure that problem.

as for the pink/blue it gives a 12v when the econ or ac buttons are pressed. from my wiring i got off the jdm it went to a multi plug and ended there. there was no wire on the other plug just an empty hole where the wire would be.

[BloodyStupidDave...]

as for the pink/blue it gives a 12v when the econ or ac buttons are pressed. from my wiring i got off the jdm it went to a multi plug and ended there. there was no wire on the other plug just an empty hole where the wire would be.

Okay, I'll check it out tomorrow and post an update. Which multi-plug had the hole where the wire should be?

[Cavegod]

dunno will have to look in the morning, i think it was one of the three plugs below the cc unit, the three vertically.

[Rusty]

cheers rusty but by the looks of your climate control it is the wrong type as mine has 2 wiring plugs on the back of it, hence why you could find the wires.

wow so you have 2 sets of wires coming out the back of your control panel? why would you need 2 and is there any difference between mine and yours?

[zonz540]

Idk if this will help, but i uploaded a copy of Toyotas repair manual for the ST205 interior.

http://www.filefactory.com/file/ah152df/n/...ssis_Manual_pdf

Best of luck, ill be doing this with my manual CC as soon as you post a how to.

[BloodyStupidDave...]

wow so you have 2 sets of wires coming out the back of your control panel? why would you need 2 and is there any difference between mine and yours?

I think you have air conditioning. The temperature dial is mechanical, moving a mixer control in the engine bay. The JDM cars had full climate control where you set the electronic dial to a specific temperature (say 22c). The system then automatically moves the mixer control back and forwards to maintain the temperature you specified. The second loom carries all the signals to do that plus signals for the extra temperature sensors needed to make the system reliable.

also anyone know what that box label 'KV' is?

That's your Engine ECU.

[BloodyStupidDave...]

remove the pressure switch plug and connect the two terminals together yellow/red+ purple white does that do the trick?

Yes, that causes the compressor to start running, the IAC to move and the revs to increase. I haven't actually left it running long enough to confirm whether it is actually blowing cooled air or not.

Does that mean that my pressure switch has failed?

Regarding the pink/blue wire:

The pink/blue from the A/C amp goes to the black plug at the bottom of the centre console. The pink/green from the A/C amp also goes to the black plug (adjacent pins). From the black plug the colours change. The wires go to the heater mixer actuator by the driver's left foot (for RHD cars; passenger's left foot on LHD cars).

Have you fitted the actuator and its wiring? It is different to UK wiring.



This post has been edited by BloodyStupidDavey: Aug 16, 2009 - 12:05 PM

[Cavegod]

cheers rusty but by the looks of your climate control it is the wrong type as mine has 2 wiring plugs on the back of it, hence why you could find the wires.

wow so you have 2 sets of wires coming out the back of your control panel? why would you need 2 and is there any difference between mine and yours?

yep i have fitted the entire system minus the blower box, i will take pictures now and post them up.

Rusty the facelift jdm cars only have 1 wire plug on the back the system is the same though just ain't worked out how different the wiring is.

[Cavegod]

Ok BSD here you go

here is my jdm compressor with the uk wiring plug and yes i am missing the 4th wire yellow/black it conects to a cylinder on the back of the compressor near the exhaust and then earths.



here is a pic of my throttle position sensor am i missing a wire?



ok inside the car now the big multiblock connector on the top of the evap housing

JDM



UK minus the red/yellow (pressure switch) and blue/yellow (compressor relay earth)



heres both the uk and jdm relay side by side both identical even part no.s



this is the pink/blue wire



it goes to here which i think is one of the three vertical connectors below the radio



as you can see that is where it stops



right that just leaves the multi plug below the evap

this is the climate control side female plug



uk male side



jdm male side



jdm and uk side by side 'jdm plugged in'



so as you can see i have 2 wires not connected the yellow/black (compressor) and the blue/ yellow which is 12v live and according to th ewiring diagram goes to the ecu 'ATS'

so if i connect the yellow/black to the compressor where does the throttle position sensor wire connect to as i only have the 12v blue/yellow not connected?

[Cavegod]

ok so i have connected the yellow/black to the compressor and didn't see any difference to the CC so dunno what it does.

oh and the reason why my pressure switch didn't work properly is because the connector pins on it where not making a good contact.

[BloodyStupidDave...]

Ok BSD here you go

here is my jdm compressor with the uk wiring plug and yes i am missing the 4th wire yellow/black it conects to a cylinder on the back of the compressor near the exhaust and then earths.

Mine is the same:


Here is the coil of wire ready to connect if needs be:

here is a pic of my throttle position sensor am i missing a wire?

No. The blue/white wire turns out to be for cruise control. It goes through the grey connector vertically mounted at the bottom of the centre console, snakes around the driver's side of the dashboard, goes through one of the white connectors on the passengers kick panel and ends up at pin 19 (21 according to the wiring diagram - maybe I miscounted) of the green cruise ecu connector.

ok inside the car now the big multiblock connector on the top of the evap housing

Mine is the same:

heres both the uk and jdm relay side by side both identical even part no.s

The fast acting relay:


The black connector at the bottom of the centre console:



The other side of it:



For completeness, the white connector next to it:




The grey connector joining the engine bay loom to the cabin loom - vertically mounted at the bottom of the centre console:


The other side of it:

right that just leaves the multi plug below the evap

I call this the black or white plug between the blower and the heater

this is the climate control side female plug

Mine is the same:

jdm male side

Mine is the same - yellow/black and blue/yellow not connected:

so as you can see i have 2 wires not connected the yellow/black (compressor) and the blue/ yellow which is 12v live and according to the wiring diagram goes to the ecu 'ATS'

so if i connect the yellow/black to the compressor where does the throttle position sensor wire connect to as i only have the 12v blue/yellow not connected?

I think you can forget about the throttle wire until you come to do the cruise control.


This post has been edited by BloodyStupidDavey: Aug 16, 2009 - 12:02 PM

[Cavegod]

you have 2 dead picture links,

where does the blue/ white throttle wire go to?

[Cavegod]

yep just checked my pink blue wire is the same but i have that pink blue splice for some reason.

[Cavegod]

ahh fast acting relay you me the power transistor, round thing on the evap housing?

i have located the ecu pin for the blue/yellow ats wire!

[Cavegod]

ok so the blue/yellow wire for the ecu goes here

4th ecu plug



this pin out right below the green/yellow



it earths about 3-4V's

i have connected it up and car still runs dunno what it does but its connected so i now have every wire connected although the system will work with a few missing lol

[BloodyStupidDave...]

i have located the ecu pin for the blue/yellow ats wire!

Awesome! So to recap:

* We know where the blue/yellow wire goes
* We think the yellow/black wire from black multi-plug below the evap / between blower and heater is for the MGV function of the compressor
* The blue/white throttle wire is a red herring. It is needed for cruise control but not climate control.
* On both your car and on my car it seems necessary to short out the pins on the pressure sensor to get the compressor to work.

Unanswered questions:
* Does the last point mean that on both our cars, the pressure sensor has failed?

Other observations:
* The wiring of your grey vertically mounted multi-plug is quite different to mine.

New questions:
* What are the colours and locations of the two wires that run to your outside temperature sensor?


This post has been edited by BloodyStupidDavey: Aug 16, 2009 - 12:15 PM

[Cavegod]

Right well i thought i would wright a how to so here goes

you will need.

JDM parts

A/C fan

A/C compressor



smooth pulley for 3gse

http://img.photobucket.com/albums/v79/cavegod/Photo-0051.jpg

longer drive belt

A/C pipe work



A/C radiator

3 relays

heater duct assembly

evapourater housing

temp mixer cable



ambient temp sensor

cabin temp sensor



solar sensor middle one



Climate control unit



CC wiring



you will need the wiring on the evap and heater duct assemblies





if your car has Air conditioning you will need to swap a few things but for this mod take it as having no air con at all, the celica gen6 should have the wiring in place for normal aircon system so to make sure check for a few things

behind glove box should be a large multiplug above the blower duct and a multiplug below blower ducting both will be taped to the wiring loom in the respective places. in the engine bay you should check for a grey connector taped up near the diagnostic port and one taped to the wires on the radiator pipe from the thermostat, and last but not least a plug taped up near the left hand relay box.

once you have made sure you have them away we go!

remove the dash board



with the dash board out of the way remove the metal tubular frame as well, then you can get to work.

remove the following

in engine bay disconect the heater hoses and mixer cable

in the car remove the blower ducting and the heater duct assembly

with those out the way you can start the install

fit the JDM heater duct assembly thread the mixer cable through to the engine bay and heater hoses, then bolt it in and connect th ecable and hoses to their respective places.

next remove the blanking panel from the bulk head and then bolt the evap housing in place. in th eengine bay fit the JDM plate over where the Evap pipe work enters the engine bay.



then fit all the engine bay A/C parts just a matter of bolting them in place, compressor torque is 25nm and all A/C pipes are 10nm. fit the A/C fan to the radiator using the three bolts and then plug it in as well as plugging in the compressor and the pressure switch. thats the engine bay done. next up is wiring the beast in!

onc you plug all the multiplugs in you will be left with a few wires that need connecting.

the following wires just need removing from the CC multiplugs and then the relevant wire from the old system pushing in.

CC unit orange multiplug

GREEN - lights
GREEN/WHITE - lights

Middle white plug

BLUE/WHITE - heater relay



large plug at top of evap

BLUE/YELLOW - compressor relay
RED/YELLOW - pressure switch



the next set of wires need connecting to the following

GREY - ACC
GREEN/RED - Batt+
WHITE/BLACK - earths

multiplug below the evap



you will notice 2 wires missing from this plug we need to add them so you will need to remove the wires from the JDM plug YELLOW/BLACK & BLUE/YELLOW



clip them in the correct place on the cars plug and then connect

YELLOW/BLACK - compressor
BLUE/YELLOW pin16 of the 4th ecu plug directly below th egreen/yellow wire.

that should be all the wires connected but you will need swap a few wires over for the blower motor depending on how you have done it.



run 2 wires to the ambient sensor on the A/C rad and connect to the ambient sensor wires on the CC.

[Rusty]

I think you have air conditioning. The temperature dial is mechanical, moving a mixer control in the engine bay. The JDM cars had full climate control where you set the electronic dial to a specific temperature (say 22c). The system then automatically moves the mixer control back and forwards to maintain the temperature you specified. The second loom carries all the signals to do that plus signals for the extra temperature sensors needed to make the system reliable.

lol I have CC thats why I was trying to help cavegod.


hmm you might be right about facelift JDM wiring...

[99gt3sge]

which wire controls the idle when the a/c is engaged? i think thats the wire im missing when i did my 3sge swap on 6th gen,

[delusionz]

im pretty sure i have 2 plugs on the back of my climate control too???

hey while you're in there, i'm doing the exact opposite. you're putting in , im taking out.

what kinda AC-only related doo-dahs have you come across so far that i can bin??