I started this thread on SF earlier this week, thinking it would be a simple "no-brainer" kind of deal. However, I have not found a definitive answer and was hoping that someone with working A/C after their swap, would chime in and help us out.
Anyways... the info from that thread is below... can someone please tell us what they did for their connections?
Thanks!
Satan 06-09-2008 11:34 PM
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Aristo 2JZ A/C 3-wire connector
Small problem...
The spare harness I have, is missing the E10 connector, so I unable to fully trace where each of the 3 wires "should" go.
The A/C connector itself is a 4-wire connector that only contains 3 wires.
Edit:
Found this in my old notes, so I think I may still be able to figure out where they should go, into the 7M body harness....
C piece.
1. Grey – Red Aircon Lock in Signal
2. Grey Aircon SG for lockin
3. White Throttle actuator trac system
4. Red Throttle actuator trac system
5. Black - white Aircon clutch signal
6. Black Throttle actuator trac system
Can someone please tell me what connections they made with these? Thanks!!
SUPRASTANGER507mgte 06-10-2008 02:06 AM
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yes, I would like to know as well as this is the only thing not working on my car after the swap.
seems like only plugs 1,2 and 5 are needed.
Satan 06-10-2008 06:45 AM
--------------------------------------------------------------------------------
I will try to look through my notes some more, tonight. I was sure I had something on this, but can't seem to find it right now (I was definitely planning on having A/C, here in Texas).
If anyone has the answer, please post it up. We would certainly appreciate it.
Edit:
Found a few pages from Rick's old site, looks like there might be some A/C signals in the IH1 and IH2 connectors for the 1JZ swap... Does this help?
http://www.geocities.com/g099521/MKI...AP/ea21989.zip
Satan 06-10-2008 08:06 PM
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Anyone? Does the 1JZ have the same connector/wires?
trd87t 06-10-2008 09:59 PM
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E,
The a/c will function mostly via the 7M harness wires. You will have to worry about only two wires
1) the one for the Mag Clutch
2) the a/c "on" circuit to the ECU
The only thing i'm having an issue with is that it will not idle up when the a/c is on; however, the a/c is fully functional.
The Mag Clutch will come from one wire on the a/c itself, pass through EA2, then pass through one of the connectors for the body harness. The clutch is actually controlled by a grounding circuit on the 7M by the a/c amplifier. On the JZ engines, the grounding circuit is controlled by the ecu.
====*do not try the following on your car*not tested*=====
====*not responsible if you break something and you are trying it*====
My logic is two-fold on the idle up. I want to try and supplying a 12v source (switched) to the ACMG pin on the ecu (since it's a grounding circuit) to see if that will idle up the car when the a/c is on.
If that doesn't work, then I will try to bring the wire from the 7M a/c amplifier for the clutch to the ecu instead. Since it's just a grounding circuit, it will control the clutch like it should, but i'm not too confident that it will function like it is supposed to. Ie, will it switch off the circuit if the condition of the pressure switches are met, or some other conditions are met. Would have to do a series of tests on all possible conditions for the a/c to see if all functions would still remain.
Again, this is my logic. I"m not using the supra as a DD, so this is not bothersome to me to turn the a/c off when i'm at a stoplight for a few mins.
SUPRASTANGER507mgte 06-10-2008 10:08 PM
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"The only thing i'm having an issue with is that it will not idle up when the a/c is on; however, the a/c is fully functional.
The Mag Clutch will come from one wire on the a/c itself, pass through EA2, then pass through one of the connectors for the body harness. The clutch is actually controlled by a grounding circuit on the 7M by the a/c amplifier. On the JZ engines, the grounding circuit is controlled by the ecu.
"
So if I read this correctly :
MAG Clutch will connect to the Single Blue wire coming from the 7m Body side harness that connected to the 7m AC unit. This wire hangs out from under the fusebox area or in the vicinity I believe.
Then connect the Amplifier signal from the ecu ( Plug # E10 - Pin# 34) to the A/C amplifier pin on the AC plug?
That sounds simple enough ..
Now, anyone have a picture of the plug labelled for these signals?
1. Grey – Red Aircon Lock in Signal
2. Grey Aircon SG for lockin
5. Black - white Aircon clutch signal
Satan 06-11-2008 07:18 AM
--------------------------------------------------------------------------------
The 3 wires go to the large Aristo body-plug connector. The connector is really 4 "sub-connectors." I have them broken out in the linked Excel file... On one of my body plugs, you can see small markings which tell you the connector/section. On my spare harness, it does not show those letters. However, you can see the wire colors and location, to easily find connector C, in the lower left of my spreadsheet. I can take a pic of the body plug, but I think this will do it for you. Hope it helps... Gotta run... gonna B late for work ;-)
http://www.geocities.com/g099521/MKIII/2JZ_SWAP/ea21989.zip
The connector comes from the long plastic runner, which is underneather the lower intake. I believe that the other connector with it is for the oil pressure switch.
The connector front shows that the lower corner is empty (sorry about the pic quality).
trd87t 06-11-2008 10:20 PM
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Quote:
--------------------------------------------------------------------------------
Originally Posted by SUPRASTANGER507mgte (Post 6049976)
MAG Clutch will connect to the Single Blue wire coming from the 7m Body side harness that connected to the 7m AC unit. This wire hangs out from under the fusebox area or in the vicinity I believe.
--------------------------------------------------------------------------------
You are correct. Here's what I did b/c I did not want to hack the body harness. I will illustrate
Mag Clutch -> 4pin JZ connector (pictured above) -> EA2 -> 7M 1pin connector (what I did for this one is take the 1pin connector off a dead 7m compressor and ran an extension wire to the EA2 connector).
Yours will differ if you are using an aristo 2j.
Quote:
--------------------------------------------------------------------------------
Originally Posted by SUPRASTANGER507mgte (Post 6049976)
Then connect the Amplifier signal from the ecu ( Plug # E10 - Pin# 34) to the A/C amplifier pin on the AC plug?
--------------------------------------------------------------------------------
You will want to do the following for this one. (This was on my 87 Supra Swap, motor and harness from jza70, yours will differ but you will get the idea)
E10-34 (labeled A/C) -> IH1-11 -> B1-13 -> 7M A/C Amp
Again, yours will differ if you are using an aristo 2j.
Hopefully this helps, if not, I will get in more detail if you tell me your setup.
trd87t 06-11-2008 10:22 PM
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Oh and E..... get that car running already!!!
SUPRASTANGER507mgte 06-11-2008 11:31 PM
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Thanks guys for the help. Its making more sense now.
I actually found the A/C plug and wire lying in my pile of wires I removed from the Aristo Harness. I will be running that outside the loom this weekend and see how the A/C works out.
On the Aristo A/C the plug has three wires - two green ones and then a white one which has another plug on it.
Then from the bottom, there is another 1 wire plug coming out. Is this one wire plug coming from the ac unit itself connected to the &m one?
Satan 06-12-2008 06:46 AM
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^^That 1 wire connector is the flat/spade kind of connector, right? I believe that it is grounded to the compressor itself. The Aristo's cap had a small screw where that wire ended before. I extended it a few inches and found a spot on the compressor (top right corner as you're looking at it, behind the clutch), where I was able to use a small screw and fasten it to the compressor.
--- My car is ready to go. I am waiting to start up, 'til maybe tomorrow. I am going to do the "Motoman" break-in, which means I need the temp tag to drive on it for a bit. That exhaust pipe is smaller than 3", so I need to get the right adapter for it, to get to an exhaust place and have 'em replace with 3"... That's it.
I still can't find my 7M pressure sender... Is there one with any of that 1J stuff you have? Kinda something I want to keep an eye on, during initial start up ;-)
I also got all of the A/C refill/adapter stuff, along with the pump. I was in training Tues/Wed and doing my job at night (suprise ;-). I am done and will have tonight to connect the A/C up and re-check all of the pre-start-up details. You already know I'll be calling you 1st, when the moment of truth arrives!
trd87t 06-12-2008 07:43 AM
--------------------------------------------------------------------------------
Quote:
--------------------------------------------------------------------------------
Originally Posted by SUPRASTANGER507mgte (Post 6052637)
On the Aristo A/C the plug has three wires - two green ones and then a white one which has another plug on it.
Then from the bottom, there is another 1 wire plug coming out. Is this one wire plug coming from the ac unit itself connected to the &m one?
--------------------------------------------------------------------------------
E is probably right with this as he's got the car right there in front of him. But can you get a picture of the connectors so we can be doubly sure that is what it is. We don't want anything to get messed up
Quote:
--------------------------------------------------------------------------------
Originally Posted by Satan (Post 6052637)
I still can't find my 7M pressure sender... Is there one with any of that 1J stuff you have? Kinda something I want to keep an eye on, during initial start up ;-)
--------------------------------------------------------------------------------
Unfortunately I don't have one laying around. I had to pull my old one off the 7M before I sold it to you. I'm sure someone local has one laying around somewhere. Worst case, Autozone will have a cheap one.
Satan 06-12-2008 11:11 AM
--------------------------------------------------------------------------------
I thought I saw one with the 1JZ set up (boxes of parts) we received with the '91. I am going to pic one up from Christian today anyways... too much work into this engine, to take any chances.
SUPRASTANGER507mgte 06-12-2008 12:21 PM
--------------------------------------------------------------------------------
Anyways... the info from that thread is below... can someone please tell us what they did for their connections?
Thanks!
Satan 06-09-2008 11:34 PM
--------------------------------------------------------------------------------
Aristo 2JZ A/C 3-wire connector
Small problem...
The spare harness I have, is missing the E10 connector, so I unable to fully trace where each of the 3 wires "should" go.
The A/C connector itself is a 4-wire connector that only contains 3 wires.
Edit:
Found this in my old notes, so I think I may still be able to figure out where they should go, into the 7M body harness....
C piece.
1. Grey – Red Aircon Lock in Signal
2. Grey Aircon SG for lockin
3. White Throttle actuator trac system
4. Red Throttle actuator trac system
5. Black - white Aircon clutch signal
6. Black Throttle actuator trac system
Can someone please tell me what connections they made with these? Thanks!!
SUPRASTANGER507mgte 06-10-2008 02:06 AM
--------------------------------------------------------------------------------
yes, I would like to know as well as this is the only thing not working on my car after the swap.
seems like only plugs 1,2 and 5 are needed.
Satan 06-10-2008 06:45 AM
--------------------------------------------------------------------------------
I will try to look through my notes some more, tonight. I was sure I had something on this, but can't seem to find it right now (I was definitely planning on having A/C, here in Texas).
If anyone has the answer, please post it up. We would certainly appreciate it.
Edit:
Found a few pages from Rick's old site, looks like there might be some A/C signals in the IH1 and IH2 connectors for the 1JZ swap... Does this help?
http://www.geocities.com/g099521/MKI...AP/ea21989.zip
Satan 06-10-2008 08:06 PM
--------------------------------------------------------------------------------
Anyone? Does the 1JZ have the same connector/wires?
trd87t 06-10-2008 09:59 PM
--------------------------------------------------------------------------------
E,
The a/c will function mostly via the 7M harness wires. You will have to worry about only two wires
1) the one for the Mag Clutch
2) the a/c "on" circuit to the ECU
The only thing i'm having an issue with is that it will not idle up when the a/c is on; however, the a/c is fully functional.
The Mag Clutch will come from one wire on the a/c itself, pass through EA2, then pass through one of the connectors for the body harness. The clutch is actually controlled by a grounding circuit on the 7M by the a/c amplifier. On the JZ engines, the grounding circuit is controlled by the ecu.
====*do not try the following on your car*not tested*=====
====*not responsible if you break something and you are trying it*====
My logic is two-fold on the idle up. I want to try and supplying a 12v source (switched) to the ACMG pin on the ecu (since it's a grounding circuit) to see if that will idle up the car when the a/c is on.
If that doesn't work, then I will try to bring the wire from the 7M a/c amplifier for the clutch to the ecu instead. Since it's just a grounding circuit, it will control the clutch like it should, but i'm not too confident that it will function like it is supposed to. Ie, will it switch off the circuit if the condition of the pressure switches are met, or some other conditions are met. Would have to do a series of tests on all possible conditions for the a/c to see if all functions would still remain.
Again, this is my logic. I"m not using the supra as a DD, so this is not bothersome to me to turn the a/c off when i'm at a stoplight for a few mins.
SUPRASTANGER507mgte 06-10-2008 10:08 PM
--------------------------------------------------------------------------------
"The only thing i'm having an issue with is that it will not idle up when the a/c is on; however, the a/c is fully functional.
The Mag Clutch will come from one wire on the a/c itself, pass through EA2, then pass through one of the connectors for the body harness. The clutch is actually controlled by a grounding circuit on the 7M by the a/c amplifier. On the JZ engines, the grounding circuit is controlled by the ecu.
"
So if I read this correctly :
MAG Clutch will connect to the Single Blue wire coming from the 7m Body side harness that connected to the 7m AC unit. This wire hangs out from under the fusebox area or in the vicinity I believe.
Then connect the Amplifier signal from the ecu ( Plug # E10 - Pin# 34) to the A/C amplifier pin on the AC plug?
That sounds simple enough ..
Now, anyone have a picture of the plug labelled for these signals?
1. Grey – Red Aircon Lock in Signal
2. Grey Aircon SG for lockin
5. Black - white Aircon clutch signal
Satan 06-11-2008 07:18 AM
--------------------------------------------------------------------------------
The 3 wires go to the large Aristo body-plug connector. The connector is really 4 "sub-connectors." I have them broken out in the linked Excel file... On one of my body plugs, you can see small markings which tell you the connector/section. On my spare harness, it does not show those letters. However, you can see the wire colors and location, to easily find connector C, in the lower left of my spreadsheet. I can take a pic of the body plug, but I think this will do it for you. Hope it helps... Gotta run... gonna B late for work ;-)
http://www.geocities.com/g099521/MKIII/2JZ_SWAP/ea21989.zip
The connector comes from the long plastic runner, which is underneather the lower intake. I believe that the other connector with it is for the oil pressure switch.
The connector front shows that the lower corner is empty (sorry about the pic quality).
trd87t 06-11-2008 10:20 PM
--------------------------------------------------------------------------------
Quote:
--------------------------------------------------------------------------------
Originally Posted by SUPRASTANGER507mgte (Post 6049976)
MAG Clutch will connect to the Single Blue wire coming from the 7m Body side harness that connected to the 7m AC unit. This wire hangs out from under the fusebox area or in the vicinity I believe.
--------------------------------------------------------------------------------
You are correct. Here's what I did b/c I did not want to hack the body harness. I will illustrate
Mag Clutch -> 4pin JZ connector (pictured above) -> EA2 -> 7M 1pin connector (what I did for this one is take the 1pin connector off a dead 7m compressor and ran an extension wire to the EA2 connector).
Yours will differ if you are using an aristo 2j.
Quote:
--------------------------------------------------------------------------------
Originally Posted by SUPRASTANGER507mgte (Post 6049976)
Then connect the Amplifier signal from the ecu ( Plug # E10 - Pin# 34) to the A/C amplifier pin on the AC plug?
--------------------------------------------------------------------------------
You will want to do the following for this one. (This was on my 87 Supra Swap, motor and harness from jza70, yours will differ but you will get the idea)
E10-34 (labeled A/C) -> IH1-11 -> B1-13 -> 7M A/C Amp
Again, yours will differ if you are using an aristo 2j.
Hopefully this helps, if not, I will get in more detail if you tell me your setup.
trd87t 06-11-2008 10:22 PM
--------------------------------------------------------------------------------
Oh and E..... get that car running already!!!
SUPRASTANGER507mgte 06-11-2008 11:31 PM
--------------------------------------------------------------------------------
Thanks guys for the help. Its making more sense now.
I actually found the A/C plug and wire lying in my pile of wires I removed from the Aristo Harness. I will be running that outside the loom this weekend and see how the A/C works out.
On the Aristo A/C the plug has three wires - two green ones and then a white one which has another plug on it.
Then from the bottom, there is another 1 wire plug coming out. Is this one wire plug coming from the ac unit itself connected to the &m one?
Satan 06-12-2008 06:46 AM
--------------------------------------------------------------------------------
^^That 1 wire connector is the flat/spade kind of connector, right? I believe that it is grounded to the compressor itself. The Aristo's cap had a small screw where that wire ended before. I extended it a few inches and found a spot on the compressor (top right corner as you're looking at it, behind the clutch), where I was able to use a small screw and fasten it to the compressor.
--- My car is ready to go. I am waiting to start up, 'til maybe tomorrow. I am going to do the "Motoman" break-in, which means I need the temp tag to drive on it for a bit. That exhaust pipe is smaller than 3", so I need to get the right adapter for it, to get to an exhaust place and have 'em replace with 3"... That's it.
I still can't find my 7M pressure sender... Is there one with any of that 1J stuff you have? Kinda something I want to keep an eye on, during initial start up ;-)
I also got all of the A/C refill/adapter stuff, along with the pump. I was in training Tues/Wed and doing my job at night (suprise ;-). I am done and will have tonight to connect the A/C up and re-check all of the pre-start-up details. You already know I'll be calling you 1st, when the moment of truth arrives!
trd87t 06-12-2008 07:43 AM
--------------------------------------------------------------------------------
Quote:
--------------------------------------------------------------------------------
Originally Posted by SUPRASTANGER507mgte (Post 6052637)
On the Aristo A/C the plug has three wires - two green ones and then a white one which has another plug on it.
Then from the bottom, there is another 1 wire plug coming out. Is this one wire plug coming from the ac unit itself connected to the &m one?
--------------------------------------------------------------------------------
E is probably right with this as he's got the car right there in front of him. But can you get a picture of the connectors so we can be doubly sure that is what it is. We don't want anything to get messed up
Quote:
--------------------------------------------------------------------------------
Originally Posted by Satan (Post 6052637)
I still can't find my 7M pressure sender... Is there one with any of that 1J stuff you have? Kinda something I want to keep an eye on, during initial start up ;-)
--------------------------------------------------------------------------------
Unfortunately I don't have one laying around. I had to pull my old one off the 7M before I sold it to you. I'm sure someone local has one laying around somewhere. Worst case, Autozone will have a cheap one.
Satan 06-12-2008 11:11 AM
--------------------------------------------------------------------------------
I thought I saw one with the 1JZ set up (boxes of parts) we received with the '91. I am going to pic one up from Christian today anyways... too much work into this engine, to take any chances.
SUPRASTANGER507mgte 06-12-2008 12:21 PM
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Satan;6053113 said:^^That 1 wire connector is the flat/spade kind of connector, right? I believe that it is grounded to the compressor itself. The Aristo's cap had a small screw where that wire ended before. I extended it a few inches and found a spot on the compressor (top right corner as you're looking at it, behind the clutch), where I was able to use a small screw and fasten it to the compressor./Yeap that is the one. So basically remove that spade connector and put a ring terminal on it and connect it to a ground souorce?
Simple enough.
E - what corresponding wires did you connect to on the three three wire connector?
Which pin does the 1 wire blue one connect to ?
And which signals you connected to the remaining two pins?
Thanks and good luck with the startup. I know you've been through it quite a bit.
Moe
Satan 06-12-2008 06:35 PM
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I have not gone through it enough yet, so I have not connected any of the 3 wires. Per my notes, I see where they are at on the body connector, buit have not made the leap yet, to connect them to the 7M dash/body harness yet.
I only have this note, regarding my A/C connections...
B1 connector:
Pin #11 Idle Up signal from A/C amplifier --- to E10 Pin 34
I can't believe no one else has chimed in with what they did, or did not do. Someone's got to have A/C goin', right? I'll have to check Arnout's site/notes, to see if he made any notes about these wires on the MKIV body plug/connector.
Satan 06-12-2008 10:38 PM
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Here's the link to the wiring info on Arnout's site... at a quick glimpse, it had a couple of the A/C related wires deleted, as the MA70 doesn't use 'em... Look at II1 connector about 1/3 down this page...
http://www.supras.nl/index.php?option=com_content&task=view&id=34&Itemid=50
trd87t 06-12-2008 10:39 PM
--------------------------------------------------------------------------------
Quote:
--------------------------------------------------------------------------------
Originally Posted by Satan (Post 6053494)
I thought I saw one with the 1JZ set up (boxes of parts) we received with the '91. I am going to pic one up from Christian today anyways... too much work into this engine, to take any chances.
--------------------------------------------------------------------------------
You know, I didn't check the box, i forgot that was in the black car
Quote:
--------------------------------------------------------------------------------
Originally Posted by Satan (Post 6053494)
I only have this note, regarding my A/C connections...
B1 connector:
Pin #11 Idle Up signal from A/C amplifier --- to E10 Pin 34
--------------------------------------------------------------------------------
E, I think this is correct for you. If I remember correct, the a/c "on" wire to the ecu is pin B1-11. This and the Clutch wire is all you need for the a/c to function. I think there will be one more connection that will have to be made, but I have to try my theories first on my car before I recommend them to anyone else. Even if my theories work, it's easy to add them to the system after everything is correct.
Quote:
--------------------------------------------------------------------------------
Originally Posted by SUPRASTANGER507mgte (Post 6053494)
E - what corresponding wires did you connect to on the three three wire connector?
Which pin does the 1 wire blue one connect to ?
And which signals you connected to the remaining two pins?
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On the 3wire connector at the a/c compressor follow the wire that is going to the front of the compressor, that will be the one that you put the blue wire. The other two, if you can trace it out, will go to the speed sensor at the bottom of the compressor. Those two wires will not need to be hooked up (unless you have a mk4). That sensor is used as a monitoring tool for the a/c system in the jza70 and jza80 cars. The 7M a/c systems did not have this provision and thus cannot use the speed sensor at the bottom of the compressor.