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Discussion Starter #1
I just took delivery of my new 2002 Z06 today and had the worst delivery experience of my life. I left the dealership in a hurry because of the threat of bad weather, so I really didn't look the car over very good. On the way home, I got caught in a major downpour, and the inside windows were fogging badly. I went to turn on the defroster and noticed nothing on the HVAC worked (no display, no control of heater, ac, etc.). The system just blew out hot air through all the vents on one fan speed. I just barely made it home by wiping the inside windows with my hand and praying. When I got home I checked the HVAC fuse for power and it was good. Does anybody know what I should be looking for to get this thing to work (where its plugged in, etc.). The dealership won't be open again until tuesday, so if its something simple, I'd like to fix it myself this weekend. I just can't believe this car left Bowling Green without anybody checking the controls. Any help would be greatly appreciated.

Dave
 

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Please post HVAC codes please

Hi there,
Please post codes that are read on the DIC, and we can proceed with your diagnosis.
I am sure that it worked at the factory, so I feel it was something that happened sice then.
Let us know ,c4c5
 

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Had the exact same problem when my Z was delivered. Of course the dealer caught it before they released it to me, but it was a bad ground in the wiring harness that lead to the controls.
 

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BTW...Happy 1 day late birthday!! :D

If you need help accessing the codes, the information is in the Owner FAQ area located

<--------------- Over there on the navigation bar!!
 

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Discussion Starter #6
Here Are The Codes

c4c5specialist,

There are 2 codes that came up. When it scanned module 99 (FIVAC Heater Vent-Air Conditioning, the driver information center displayed "No Communication".

The 2 codes that were present in the system were:

B2252H and
U1000H

Can you tell me if either of these codes are related to the problem and how I should proceed now. Thank you!:) :-D :)

Dave
 

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NO COMM is the clue

HI there,
Your NO COMM is the clue there, for the non functioning.
Ok, as long as the fuse, which is #27 under the passenger toe board is ok, then I am basically positive that your HVAC control head is bad.
Here is why, you see, the NO COMM is telling you that the controller is NOT communicating with the other control modules, including the IPC.
So, as long as the power is good going to the controller, it is most likely an internal fault within the control head, and will most likely be replaced.
Sorry, nothing that you can do here, it will have to go to the dealer.
Take care, c4c5
 

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Discussion Starter #8
I Had It Working For A Minute!

c4c5specialist,


I didn't even know there were two different HVAC fuses. The fuse I originally checked was #18. When you said to check fuse #27, I immediately went out to the car to check it. This is where the wierdness started. With the ignition key in the run position, I put the test light on the fuse, and the system came on. The temperature was displayed, the fan buttons, mode changes, etc., all worked. I was really excited - but that didn't last. I put the cover back on, started the car, and nothing was working again. I then took off the fuse panel, pulled the fuse, put a different fuse in, but could not get the system to work again:( . Do you think there could be a bad connection, or is it still probably something in the control head as you said? Thanks for the information, I'll take it to the dealer this week and let them play with it.:)

Dave
 

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your onto something

Hi DAve,
I agree that I think that you moved something near the fuse block that connected for a minute.
When you talk with the service advisor, please tell them everything that you have told me, better yet, just print this out, and give it to them.
Please remember that we need all the information possible to correctly repair your problem, so let them see this post, and I am sure that you will be served well.
Take care, and keep us posted, on how you do, c4c5
 

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Dave

yes you should should take it to the dealer. When i took care of fcalmes z06 it was a loose ground at G202. You need to make sure that you also have a good ground to any component. You can have power any thing but no ground will also stop any component from working. I have also came across some loose terminals in the fuse box. let me know what the problem was.
 

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Discussion Starter #13
Thanks Guys!

Thanks for all your input, I really appreciate it.:) I took the car to the dealer today, and they determined it was a faulty control head (just like c4c5 specialist predicted). They ordered the unit and it should be here in a few days. I'll let you know the results after its installed.:D

Dave
 
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