I would like to apologize in advance just in case I missed something about this.
I have a 2003 G35 sedan that I bought after it was in an accident. The ac never worked, I had to replace the electric fan because it was hit.(I also traced the wires to make sure there were no cuts or broken wires) I also replaced the ac compressor (it was squealing) The cd player was jammed so I put in the metra kit with a double din unit hoping the ac would work. The compressor will not come on, I can run power to it & it will turn on. All of my controls are working & the cabin sensor is plugged in. I have pulled the battery & took the cover for the fuse panel behind it. The ac fuse is not blown but I am confused about the relays. Any suggestions b4 I start throwing more $$ at it guessing.
Thank you in advance, I have already learned tons reading on this site!

 

My 2005 G35x showed the same symptoms.

Everything was in working order, but the compressor would not 'click' on. Ended up being a leak in the metal hose that runs below the compressor (just visibile from the top of the radiator). The freon had escaped and there was no pressure left in the system. There is a pressure switch in the system that detects low freon pressure and does not allow the compressor to switch on (to save the compressor).

Maybe have your pressure checked? If it's low or non-existent you'll need to have your system checked for leaks, the leak corrected, and the system recharged.

 

Thank you for the reply. I just had the system filled, no leaks.
I have also tested the 3, 6 prong relays behind the battery, I get continuity on both sides & they click on. My condenser fan doesn't kick on ever either.

 

Where did you get the new compressor? They are a variable displacement compressor and can be difficult to find.

 

I got it out of another 2003 Infiniti G35, it worked in the other car, & I can get it to turn on by putting power to it.

 

Silly question. How are you turning on the ac? are you pressing the ac button then the fan or are you pressing the auto button? My ac will only work when I press the auto button to get it going. If I just press the ac button then try to adjust the temp I get hot air blowing in my face

 

I have tried both ways, no luck!

 

Check the wiring at the compressor for voltage then have someone push the buttons inside the car. If that doesn't work then check the pins in the metra kit tomake sure that one of them didn't get bent when you plugged it in.someone put a metra kit in my g and I can't get it unplugged to Save my life, so when the day comes of getting the jdm kit I'm going to have to cut the wires

 

How did you properly fill the AC system without compressor working ?

Did you check pressure switch/harness for damage ? Its located in front of condenser on passenger side near horn. It may have been damaged in accident.

 

THIS TIMES 50 BILLLLLION!!!!

Dude you did put refridgerant in the system, right?



reading this and no responses asking about refridgerant I'm like WTF guys

 

As my post said earlier, I had it filled & checked for leaks. It has a new condenser in it & the pressure switch is not damaged. My next step is to take the deck back out & check the plugs for the metra kit.

 

Ahh missed that, my bad.

It's probably your ACC circuit board, they fry along with the audio unit, power routing is all interconnected, that's why the ACC controls cut out when the radio cuts out (infamous problem on these cars)

Inspect the circuitry with nitrile gloves on (surgeon style). Using bare hands will roast the circuitry due to the grease/oil on your skin.

"cold solders" or burnt transistors are easy to identify on a visual inspection and by simply smelling the area. If it smells burnt, and you are unable to test/repair the circuit board unit, you'll need a new one.
You're hoping to find a cold solder, becuase that can easily be re-soldered to fix it.

There's also a manual ACC diagnostic procedure but I'm not familiar with it. There's instructions in the FSM: http://Nicoclub.com/fsm

 

HotRodG35 was right (for the most part) the pressure switch was not damaged but the wires were wearing thin, put a new plug on it & now I have ICE COLD air!

 

I put the metra kit in to get away from the circuit board problems, it comes with a new board for the ac

 

Happy to hear!