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Modifying stock AC controller to fit DD kit

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Old Jun 26, 2007 | 02:13 PM
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Modifying stock AC controller to fit DD kit

Ok, so the AC controllers are out of stock pretty much everywhere. Has anybody considered just cutting the PC board and separating the AC controller from the radio? I know there are traces that go across that gap, but could those be for the radio source buttons and lights? I mean it has its own connecting harness and I can't see Nissan designing two completely different circuits for the same purpose. I'm considering doing this if I get no sure reports of it not working. If I mess it up, I'll just bite the bullet and wait for the aftermarket one to be in stock somewhere, and if it works, then I'll save people a lot of money. What do you think?
 
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Old Jun 26, 2007 | 02:25 PM
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From: Pothole Central and still ridin slammed...Boston
Geesh Digital are we having withdrawl from selling me your double din already?
 
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Old Jun 26, 2007 | 02:30 PM
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Also just incase you do decide to do it
https://g35driver.com/forums/archived-sales/164052-fs-brand-new-03-04-circuit-board-head-unit.html
 
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Old Jun 26, 2007 | 03:26 PM
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No, you have the one from my '04 which I ran into a tree dodging a deer. I need an '07 to fit my new G
 
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Old Jun 26, 2007 | 03:40 PM
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Here is an image of what I plan to do. Will the AC still function if the AC conroller is not plugged in? I know I won't be able to change anything, but I should be alright for a while if it gets stuck on 72 degrees right?

thanks to bios2k for the image
 
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Old Jun 26, 2007 | 03:44 PM
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You got me there on that one bro. I mean it looks like it can be done but the question is what will the cutting do to the lines in the circuit board.
 
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Old Jun 26, 2007 | 04:21 PM
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Originally Posted by Hi-Tech_G
You got me there on that one bro. I mean it looks like it can be done but the question is what will the cutting do to the lines in the circuit board.
See, my thought is the traces that are above the red line, but below the actual ac controller, are for the stock radio's function buttons, so cutting them should have no effect on the AC controller. Anyways I am going to do this ASAP, because I have found a place where I can get an 07 JDM AC controller in stock, so I have a backup if I kill this one.
 
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Old Jun 27, 2007 | 02:29 AM
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did you cut it yet
 
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Old Jun 27, 2007 | 02:32 AM
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the easiest way to tell is to follow the traces on the heater control plug as far as you can. i would do it, but im not going without a radio and not going to cough up 100 bucks for a circuit board.
 
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Old Jun 27, 2007 | 11:21 AM
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I'll be making my final judgment this weekend. Stay tuned for an update then.
 
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Old Jun 27, 2007 | 12:54 PM
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awesome! i am bidding on a double din eclipse unit NOW!!!!
 
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Old Jun 29, 2007 | 01:33 PM
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Don't do it. You have *no* idea if the circuit on the bottom half is independent of the top half. Even if it works after you cut it (which I sincerely doubt it will work) you may change the behavior of the circuit and it might affect/damage another component that is not so easily replaceable.
 
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Old Jun 29, 2007 | 01:41 PM
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Originally Posted by deliciouspoison
Don't do it. You have *no* idea if the circuit on the bottom half is independent of the top half. Even if it works after you cut it (which I sincerely doubt it will work) you may change the behavior of the circuit and it might affect/damage another component that is not so easily replaceable.
Ummmmm, that is a good point...however I feel that with my background (Electrical Engineer) I feel like I can judge how the traces are used. I am going to examine the unit this weekend, and make my final judgement. I will only cut it if I can do so without cutting any traces. Honestly if I was shorting the circuit I would be much more concerned about damaging other connected circuits, but I would simply be opening them.
 
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Old Jun 29, 2007 | 02:11 PM
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Take pictures, for a future DIY. I'm pretty sure you'll get 10 million emails. honestly, i'd like to see this done myself.
 
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Old Jun 29, 2007 | 03:34 PM
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i'm EE also. It might work as the two half are independent.

Study atc.pdf (automatic air conditioner). I did and looks like it communicates to the "Display and A/C auto amp." (up by the clock) , the illumination system, and the defogger system. pg ATC-44 (i'm looking at the 05 model yr).

Connector M38 pins 2, 3, 9,10,11,12,7,6,5,8 look important. Follow these traces on the board and make sure the components are on the upper half. Don't mess wih those signals and you should be fine.

Good luck
 
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