Getting A/C to work - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

rob 2fast4u · 09-26-2017, 08:43 PM

Im in the planning phase on doing a built 2jzge / 72mm turbo / cd009 trans with 8.8 rear end.

Has anyone gotten a/c to work? I will be running a haltech elite 2500 and was wondering if its possible. I know a simple way would be to wire the a/c request from eh factory button to the haltech and have the haltech output the signal to turn the compressor on but I'm guessing its more complex than that? The system would have to turn itself on/off and activate the fans from the condenser wouldn't it? And something tells me this is all controlled via can

rob 2fast4u · 09-28-2017, 06:35 PM

I took a closer look at the wiring diagram from a BRZ and it looks like the only two wires from the factory ecu are going to the clutch and the pressure switch after that the connection goes to the a/c amplifier.

anyone have input on this?

mkivsoopra · 09-29-2017, 01:17 AM

Sorry, not very helpful, but I have AC working with Motec. In the Motec 86 harness wiring diagram, I do see only two connections related to AC: http://www.motec.com/filedownload.ph...pdf?docid=4504

rob 2fast4u · 09-29-2017, 12:54 PM

Thanks! I never thought of looking at an ecu with a wiring loom already made for this car. It looks like the first one is a switched input that would be the a/c request from you pressing the button... and the second says A/C heater relay and that would be going to the negative side of the relay so that the ecu could switch it to ground and turn the compressor clutch on.

Im still trying to find information on this pressure switch and what it does

Sportsguy83 · 09-29-2017, 01:05 PM

Quote:

Originally Posted by rob 2fast4u

Im in the planning phase on doing a built 2jzge / 72mm turbo / cd009 trans with 8.8 rear end.

Has anyone gotten a/c to work? I will be running a haltech elite 2500 and was wondering if its possible. I know a simple way would be to wire the a/c request from eh factory button to the haltech and have the haltech output the signal to turn the compressor on but I'm guessing its more complex than that? The system would have to turn itself on/off and activate the fans from the condenser wouldn't it? And something tells me this is all controlled via can

As far as I've learned, asked around, talked to shops that have done swaps, there is some CAN communication needed to make the AC work.

rob 2fast4u · 10-04-2017, 06:07 PM

it looks like ac request is going through CAN but everything else is wired from the ecu.

09-26-2017, 08:43 PM	#1
rob 2fast4u Member Join Date: Jun 2016 Drives: 2JZ BRZ Location: NS, CAN Posts: 56 Thanks: 3 Thanked 40 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Getting A/C to work Im in the planning phase on doing a built 2jzge / 72mm turbo / cd009 trans with 8.8 rear end. Has anyone gotten a/c to work? I will be running a haltech elite 2500 and was wondering if its possible. I know a simple way would be to wire the a/c request from eh factory button to the haltech and have the haltech output the signal to turn the compressor on but I'm guessing its more complex than that? The system would have to turn itself on/off and activate the fans from the condenser wouldn't it? And something tells me this is all controlled via can

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
new 2014 Wheels - RAYS VOLK Racing ZE40 \| WORK Meister M1 \| WORK Seeker Series	RavSpec	Wheels and Tires	8	06-15-2014 10:07 AM
WORK Emotion Wheels Winter Promotion \|\| Free WORK Lugs or WORK Caps	RavSpec	Wheels and Tires	18	12-10-2013 05:19 PM
18x9.5 +38 Work Emotion CR kai Work Metal Buff	Jive Turkey	Wheels and Tires	22	05-20-2013 01:54 AM
Work Emotion CR Kiwami Bronze 18x8.5 +47 18x9.5 +38 (5x100) w/tires + Work lug nuts	serial gixxer	Wheels and Tires	41	03-29-2013 03:14 AM

09-28-2017, 06:35 PM	#2
rob 2fast4u Member Join Date: Jun 2016 Drives: 2JZ BRZ Location: NS, CAN Posts: 56 Thanks: 3 Thanked 40 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I took a closer look at the wiring diagram from a BRZ and it looks like the only two wires from the factory ecu are going to the clutch and the pressure switch after that the connection goes to the a/c amplifier. anyone have input on this?

09-29-2017, 01:17 AM	#3
mkivsoopra Senior Member Join Date: Dec 2012 Drives: BRZ Location: CA Posts: 805 Thanks: 939 Thanked 950 Times in 412 Posts Mentioned: 161 Post(s) Tagged: 1 Thread(s)	Sorry, not very helpful, but I have AC working with Motec. In the Motec 86 harness wiring diagram, I do see only two connections related to AC: http://www.motec.com/filedownload.ph...pdf?docid=4504

09-29-2017, 12:54 PM	#4
rob 2fast4u Member Join Date: Jun 2016 Drives: 2JZ BRZ Location: NS, CAN Posts: 56 Thanks: 3 Thanked 40 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thanks! I never thought of looking at an ecu with a wiring loom already made for this car. It looks like the first one is a switched input that would be the a/c request from you pressing the button... and the second says A/C heater relay and that would be going to the negative side of the relay so that the ecu could switch it to ground and turn the compressor clutch on. Im still trying to find information on this pressure switch and what it does

10-04-2017, 06:07 PM	#6
rob 2fast4u Member Join Date: Jun 2016 Drives: 2JZ BRZ Location: NS, CAN Posts: 56 Thanks: 3 Thanked 40 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	it looks like ac request is going through CAN but everything else is wired from the ecu.

User Name		Remember Me?
Password