2jzgte swapped sc300 AC problem
05-16-11, 04:47 PM
#18
Yeah it comes with instructions on how it suppose to be wired in. It's been about a little over a year now and I'm sure the instructions are thrown away. It's the relay that he uses that is key.
Last edited by trancuongv; 05-16-11 at 04:48 PM. Reason: Mispelled
05-16-11, 05:12 PM
#20
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hey cuonggs300 was the install basically a wire between the a/c wire or was there a couple wires involved?
account i would really like to try that out, but is it as simple as splicing it between the wires?
account i would really like to try that out, but is it as simple as splicing it between the wires?
Last edited by soarer13oy; 05-16-11 at 05:22 PM.
05-16-11, 06:43 PM
#24
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Im still confused....theres a radio shck near me that has this item according to their website. What i dont understand is that if the ecu sends a 12v signal instead of a ground, which wires would be wired to this relay because the a/c wire is just one itself? Im sorry im ppretty much an idiot when it comes to diagrams.
05-16-11, 07:08 PM
#25
http://www.youtube.com/watch?v=wz4X5umfNkQ
According to Dr Tweak the SC HVAC unit sends out a ground and the Aristo ECU wants a +12 volt. We use the SC HVAC unit to ground the trigger wire of the relay. This pulls the switch closed sending a +12v signal to the Aristo ECU.
Cutting the A/C wire gives us two ends. One goes to the Aristo ECU. Other to the HVAC unit. That's two ends right there. For the other two you need to supply a +12v signal.
According to Dr Tweak the SC HVAC unit sends out a ground and the Aristo ECU wants a +12 volt. We use the SC HVAC unit to ground the trigger wire of the relay. This pulls the switch closed sending a +12v signal to the Aristo ECU.
Cutting the A/C wire gives us two ends. One goes to the Aristo ECU. Other to the HVAC unit. That's two ends right there. For the other two you need to supply a +12v signal.
05-16-11, 07:21 PM
#26
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Ok thanks il try this out and inform you asap.
What i was thinking previously was to find the wire from the climate control unit and hook it up to the ground wire from the relay and supply the 12v along with a 12v signal so when the climate control sends the ground signal to the relay it would complete the circuit sending a 12v to the ecu telling it to turn on. I was thinkin of just a simple 12v relay.
Is the purpose of this relay to draw a small amp?
What i was thinking previously was to find the wire from the climate control unit and hook it up to the ground wire from the relay and supply the 12v along with a 12v signal so when the climate control sends the ground signal to the relay it would complete the circuit sending a 12v to the ecu telling it to turn on. I was thinkin of just a simple 12v relay.
Is the purpose of this relay to draw a small amp?
Last edited by soarer13oy; 05-16-11 at 07:42 PM.
05-16-11, 11:13 PM
#27
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Thanks account2x I had everything figured out, it was just the relay part I was having trouble tracking down when I just simply call asking for 12vdc .5a high sensitivity relay, all the idiots had no clue what I'm taking about or say they don't have it, will be trying it out next few days and report back to see if it works.
05-18-11, 10:41 AM
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Alright, I'm gonna let the cat out of the bag since with the help of account2x for the relay info and info I found on the forum for the long discussed AC problem that pops up when using the Jdm aristo ecu. Yet few discussed how to fix it, but no one willing to paint a picture or give exact instruction of how to fix it, this will fix the problem assuming everything on the harness swap was done correctly at least for the AC wiring part. I drove around after wiring it up yesterday and everything is working as it should and cycles like it suppose to. Good luck everyone.
Best of all it's only a $3.45 fix
I wanna thank account2x for finding the relay as that was the part I was having a hard time finding the right one.
This is where to get it
Radio shack part # 275-233
It's called SPST 12 volt dc Reed Relay rated 0.5A 125VAC that's what it says on the box
http://www.radioshack.com/product/in...=under+%243.99
This is what it looks like thanks to account2x for these info
First you locate e-10 pin 34 which is the AC at the ecu and cut about 6" from the ECM, so now you have one part going into he ECM and one away.
Then locate e-10 pin 32 which is to tap in to supply power for relay.
Here is how to hook it up, Going off of the picture above.
Top pin gets hooked up to power ( got mine from e-10 pin 32)
Left middle pin gets hooked up to hvac ( which is the e-10 pin 34 wire that was cut, the part going away from the ecu)
Right middle pin gets hooked up to acc power ( e-10 pin 32 again)
Bottom single pin gets hooked AC at ECM ( e-10 pin 34 wire going into the ecu that was cut earlier)
Now just clean up everything and shrink wrap all the the connections after it's been tested and enjoy your now working AC.
Anyone wanna send me a 12 pack of beer after all the headache trying to properly figure out how to fix this
enjoy everyone
Best of all it's only a $3.45 fix
I wanna thank account2x for finding the relay as that was the part I was having a hard time finding the right one.
This is where to get it
Radio shack part # 275-233
It's called SPST 12 volt dc Reed Relay rated 0.5A 125VAC that's what it says on the box
http://www.radioshack.com/product/in...=under+%243.99
This is what it looks like thanks to account2x for these info
Then locate e-10 pin 32 which is to tap in to supply power for relay.
Here is how to hook it up, Going off of the picture above.
Top pin gets hooked up to power ( got mine from e-10 pin 32)
Left middle pin gets hooked up to hvac ( which is the e-10 pin 34 wire that was cut, the part going away from the ecu)
Right middle pin gets hooked up to acc power ( e-10 pin 32 again)
Bottom single pin gets hooked AC at ECM ( e-10 pin 34 wire going into the ecu that was cut earlier)
Now just clean up everything and shrink wrap all the the connections after it's been tested and enjoy your now working AC.
Anyone wanna send me a 12 pack of beer after all the headache trying to properly figure out how to fix this
enjoy everyone
Last edited by Lexsingle; 05-18-11 at 11:33 AM. Reason: Info
