Write-Up: HVAC Assembly

Subject: Re: Write-Up: HVAC Assembly Wed Jul 29, 2009 9:29 am

superivicharg wrote:

MY A/C, AND HEAD A/C HEAD UNIT HAS STOPPED WORKING ALL TOGETHER WHEN EVER I GOT A TV PROFESSIONALLY INSTALLED, I BROUGHT IT BACK THEY SAID IT WAS LIKE THAT BS!!! ANYWAYS I WORK AT A SHOP AND THE TECH 2 BROUGHT UP A DTC34 LOSS OF DATA TO HVAC PROGRAMMER, CAN ANYONE GIVE ME SOME MORE INPUT OR ADVICE ON HOW TO GET ICEY AGAIN IN THIS HEAT, LATA

please add the year of your car to your signature.

_________________
'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS

Subject: Re: Write-Up: HVAC Assembly Wed Jul 29, 2009 11:09 am

superivicharg wrote:

MY A/C, AND HEAD A/C HEAD UNIT HAS STOPPED WORKING ALL TOGETHER WHEN EVER I GOT A TV PROFESSIONALLY INSTALLED, I BROUGHT IT BACK THEY SAID IT WAS LIKE THAT BS!!! ANYWAYS I WORK AT A SHOP AND THE TECH 2 BROUGHT UP A DTC34 LOSS OF DATA TO HVAC PROGRAMMER, CAN ANYONE GIVE ME SOME MORE INPUT OR ADVICE ON HOW TO GET ICEY AGAIN IN THIS HEAT, LATA

OK so you work at a shop... did you pull the dash yet to see if maybe the wires to the HVAC head are not completely seated? Since you work at a shop, taking the dash off yourself and having a look back there should not be a big deal. Please do it and tell us what you find.

Albertj

_________________
1998 with all fac. opts. (exc. CD changer and subwoofer); 209,000 miles. Mods: KYB front struts, extra noise barriers, fire extinguisher, Magnecor 8mm plug wires, 4-note horn, custom-made stainless exhaust.

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Subject: Re: Write-Up: HVAC Assembly Wed Jul 29, 2009 4:52 pm

thanx dude im gonna hit that up so i can get to the bottom of this

Subject: Re: Write-Up: HVAC Assembly Wed Jul 29, 2009 4:58 pm

yea i bought a new a/c head unit when i bought the car cuz the bulbs on the fan button didnt light up, it worked til i got a tv installed, i have a wiring diagram for the hvac and a green&black wire runs through the radio harness and the hvac harness, im not the best with tracing down wires but the code pulls up the same thing everytime, its just the hvac programmer is $500 and i want to know for sure thats it, i would take it to the dealer but they gonna tell me what i already know besides replacing the programmer

Subject: Re: Write-Up: HVAC Assembly Wed Jul 29, 2009 8:21 pm

are you saying that the TV got wired into the HVAC harness?

probably the thing to do is

1) hope they did not fry the AC controller
2) there are empty positions in teh fuse panel, a GM dealer should have the bits you need to add a fuse and then you can run a wire to the TV instead of taking power from the HVAC circuit. If the power drain from other stuff on that circuit (a TV, natch) is too high a low voltage condition might result. Some solid state electronics don't like to run right with voltage too low and may malfunction or be destroyed as a result.

You will need the wiring diagram in the installation manual for the TV to figure this one out; it's been pointed out before on this forum that Rivs really do not like electrical aftermarket accessories...

good luck...

Albertj

_________________
1998 with all fac. opts. (exc. CD changer and subwoofer); 209,000 miles. Mods: KYB front struts, extra noise barriers, fire extinguisher, Magnecor 8mm plug wires, 4-note horn, custom-made stainless exhaust.

Avatar is missing.

Subject: Re: Write-Up: HVAC Assembly Wed Aug 19, 2009 5:32 pm

HAS ANYONE REPLACED A HVAC PROGRAMMER BEFORE I JUST BOUGHT A NEW FROM THE DEALER FOR $500 AND INSTALLED IT AND NOTHING HAPPEND IT DOES THE SAME THING AS BEFORE NOT A THING, THE DEALER SAID TURN THE KEY SWITCH ON FOR 3 SECS AND BINGO, WELL I NEED HELP FROM A RIV OWNER

Subject: Re: Write-Up: HVAC Assembly Wed Aug 19, 2009 8:26 pm

Yes I have, and I bought it from the salvage yard for $10. All the lights worked and after I plugged it in everything was fine. I don't see why anyone would wire a TV through the HVAC controller? I'd take it back to the person who installed the TV and tell them to rewire it.

Subject: Re: Write-Up: HVAC Assembly Wed Aug 19, 2009 8:33 pm

superivicharg wrote:

HAS ANYONE REPLACED A HVAC PROGRAMMER BEFORE I JUST BOUGHT A NEW FROM THE DEALER FOR $500 AND INSTALLED IT AND NOTHING HAPPEND IT DOES THE SAME THING AS BEFORE NOT A THING, THE DEALER SAID TURN THE KEY SWITCH ON FOR 3 SECS AND BINGO, WELL I NEED HELP FROM A RIV OWNER

HOLY CAPS LOCK BAT MAN

_________________
1.9RR's, SSAC, LQ4 maf and N*, Gen V-ported, L32 LIM ported and polished, L26 block, L67 heads, tune, E85, 65# injectors
Worthy quotes:

Rickw wrote:

What a dipshit, grow up.

deekster_caddy wrote:

LOL @ guessing Rick's age. Since we've gotten together a couple of times I won't guess wink

he'd probably hit me

Subject: Re: Write-Up: HVAC Assembly Wed Aug 19, 2009 8:59 pm

I replaced my HVAC head unit and it just plugged in and worked. Have you checked all your fuses? Do any lights come on?

_________________
'98 Buick Riviera; Gen V 3.25 pulley, N*, VS Cam, 180 stat, Custom PCM (Powrtuner), headers & HF cat , 42.5 lb inj.

Grant-built/PRJ/Thrasher trans 3.29 gears, 7/8 chain, zzp hardened IS

Subject: Re: Write-Up: HVAC Assembly Wed Aug 19, 2009 10:24 pm

albertj wrote:

are you saying that the TV got wired into the HVAC harness?

probably the thing to do is

1) hope they did not fry the AC controller
2) there are empty positions in teh fuse panel, a GM dealer should have the bits you need to add a fuse and then you can run a wire to the TV instead of taking power from the HVAC circuit. If the power drain from other stuff on that circuit (a TV, natch) is too high a low voltage condition might result. Some solid state electronics don't like to run right with voltage too low and may malfunction or be destroyed as a result.

You will need the wiring diagram in the installation manual for the TV to figure this one out; it's been pointed out before on this forum that Rivs really do not like electrical aftermarket accessories...

good luck...

Albertj

Referring to the above: are you going to continue posting in caps or are you going to roll up your sleeves and get the installation manual for the TV and figure this out?

If you are not able to do that (that's OK not everyone wants to dive into car wiring, it's not their cup of tea) the thing to do is go back to the installation place and tell them please take the TV out and restore the wiring to factory spec.

Albertj

_________________
1998 with all fac. opts. (exc. CD changer and subwoofer); 209,000 miles. Mods: KYB front struts, extra noise barriers, fire extinguisher, Magnecor 8mm plug wires, 4-note horn, custom-made stainless exhaust.

Avatar is missing.

Subject: Re: Write-Up: HVAC Assembly Sat Oct 17, 2009 8:22 pm

THE DEALER TOLD ME MY PCM WAS BAD, THAT CAUSED MY A/C TO STOP WORKING NOT THE TV, AND THAT WAS THE REASON MY BRAKE LIGHTS DIDNT WORK ONLY THE THIRD LIGHT, SO I GUESS I NEED A PCM TO FIX MY PROBLEM, ANY ADVICE OR TAKE THE WORD

Subject: Re: Write-Up: HVAC Assembly Sat Oct 17, 2009 8:36 pm

It all sound too odd.
I didn't think the PCM would fail in such a way, but I'm not sure.
Have you tried disconnecting the other stuff just to see what happens.?

_________________
98 Riv, 102K Miles, EBC, LS1 Ft.Calipers, STB, Addco Rr Sway Bar, 180* stat., SSAC Headers, HF Cat, 1.9's,
105# springs, MPS 3.4, DHP tuned by the Deekster.

Subject: Re: Write-Up: HVAC Assembly Sun Oct 18, 2009 6:55 am

OK, let's get a couple things straight (everyone, not just you wink

)...

First of all, it's VERY unlikely that the PCM is sour... It has little to do with the ECC (Electronic Climate Control) and very much to do with the drivetrain. If the car runs fine, the mechanic is probably spouting bullshit.

Secondly, the ECC Programmer is NOT the thing on the dashboard that we punch buttons on... That is the ECC 'Head' or 'Control'.

The 'Programmer' is behind the passenger's kick panel, on the right side of the footwell. However, this problem, considering the trouble code and especially the aftermarket TV-job, sounds like the data line between the center stack (where the Head is) and the Programmer was severed. IIRC, the radio and the ECC share a data line, so that the steering wheel controls can tell them both what to do... Also, the PCM doesn't care what the sound system is doing, but it does need to know when the compressor is requested, and the ECC needs to know when the coolant is hot enough to start blowing heat.

Do you have the shop manuals (FSM)?

_________________
97 Riviera L67 - Desert Sandstone - Gutted AB Lid, Kool Blue AF, 180* SuperStat, Hogan 3" DP, ZZP 3.6" MPS; Sensa-Trac struts, Rockford-Fosgate 6x9's; Annoyance-Fixes: Express-Down delete, Full-time juice to Power Port, BRP-power to Glovebox lite, Brake-to-Shift delete, Console-compartment lite, Seat/Mirror Memory in any gear.

69 Wildcat Convertible, 430" QJet - Burgundy/Black - P/Win, P/Seat, P/Ant, Tilt, Cruise, Remote Trunk, Rallyes, AM/FM Mono!