2006 jetta tdi no a/c

caper7

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Jan 23, 2006
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Sydney , Nova Scotia
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2013 highline ,2006 jetta tdi
Hi wondering if anyone has break down of the fuses under the hood and under drivers side with the relay break down for the air conditioning. I was also wondering about a fan control module if anyone has a pic or where it is would be appreciated. I have power going to my fans but they dont come on. I took the fan off supplied power and they both ran fine. My ac is fully charged and has power to compressor i jumped it worked fine . I had to one dealer and notice that in space 22 it is empty according to book should be a 40 amp fuse there and in spot 40 . Anyone confirm anything thanks
 

2004STARWARSTDI

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Joined
Oct 19, 2004
Location
LAKELAND, FL
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2004 Platinum Gray GLS Jetta / 2006 Silver Jetta with DSG
06 fuses

Several of us with 06 Jettas compared fuse diagrams and everyones differed. It depends on build date and if car is basic, GL, GLS.......:mad:
 

MJ72

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Sep 23, 2007
Location
West Bend, WI
TDI
2006 Jetta pkg1
I'l make an attempt.

According to my Bentley, fuse SB1 (20 amp) runs the Comfort System Control Module. It should be the top right fuse in the fuse box under the hood.

In the in-dash fuse box, fuse SC 16 is identified as "A/C control module" This might be the one you are looking for. It's a 10 amp fuse found in the third row from the top, 5th fuse from the Left.

Both of these may be incorrect as my Bentley only shows 1 fuse configuration, but there appears to be other configurations.

Couldn't find anything regarding a "fan control module" but the "Blower Control Module" is attached to the blower motor in Climatronic systems (again, according to my Bentley. The blower motor is under the passenger side of the dash, accessed through the passenger side footwell.

Hope this helps, I apologize if it doesn't!
 

40X40

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Feb 12, 2006
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Kansas City area, MO
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2013 Passat SEL Premium
Before you change anything in your fuse box, take a PICTURE of it so you can put it back just like it was..

Bill
 

DanG144

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Aug 2, 2007
Location
Chapin, South Carolina, USA
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2005 A4 Jetta 5spd
Does your car have the Climatronic AC that you set a temperature and it maintains it? Or is it manual AC controls?

The GLS probably tells the cognoscenti, but not me.

If it is the climatronic, then you can do a lot of troubleshooting with the VCDS.

It also may help if you can look on the driver's door frame and tell us the build date.

I'll see if I can borrow DidJettaRun's A5 manual.

Dan
 

caper7

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Jan 23, 2006
Location
Sydney , Nova Scotia
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2013 highline ,2006 jetta tdi
Hi guys thanks for the tips i checked the fuses they were both fine and the date on door manufacturered is 04 .05 The car has manual ac control. I cant seem get the fan in front car to go . If i disconnect and feed it 12v direct both fans spin fine. I jumped the ac compressor and it started to work fine so compressor is fine. I have a few black relay i assume they are numbered 449, 53, 404 ,460, and under hood 433 and 458 i wonder if one them is trouble
 

DanG144

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Aug 2, 2007
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Chapin, South Carolina, USA
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2005 A4 Jetta 5spd
Take a look under the battery, is there a 2 by 2.5 by 6" relay hanging there?

If so, this is your fan control relay. You could probably use the A4 manual AC troubleshooting guide here.
http://forums.tdiclub.com/showthread.php?t=242699 look in the bottom of post #1.

I have not been able to borrow a manual yet, so this is just a guess.

It sounds as if you may be getting a low refrigerant pressure signal from your pressure sensor. This is one possible cause of the symptoms you describe. Can you get a set of pressure gauges to put on it? You need a set with a high pressure gauge, not just a suction pressure gauge.
 

caper7

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Joined
Jan 23, 2006
Location
Sydney , Nova Scotia
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2013 highline ,2006 jetta tdi
OKay Dan i am going to take battery out and check it. I took wiring apart for the fans the 4 pin harness. I got the fans to come direct from a battery touching 1 pin and number 4 .. Which do you check for difference slow and hign
 

caper7

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Joined
Jan 23, 2006
Location
Sydney , Nova Scotia
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2013 highline ,2006 jetta tdi
Well i took the battery out and tray below it no sign of any fan control module. There was a black box that slides into the fuse panel under the hood had a big relay in it Number 457. Had 038 907 281b on it ..
 

Luis G

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Joined
Aug 19, 2008
Location
Kyle, Texas
TDI
2006 Jetta
With the AC on, what is the voltage going to the compressor?

It wont turn on the compressor with less than 12 volts.

It might be the pressure switch. I had one go out. Look for one of my threads.
 

DanG144

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Chapin, South Carolina, USA
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2005 A4 Jetta 5spd
Actually every properly operating A4 (post May 99) I have checked was sending 9.5 volts to the clutch. I do not know what voltage an A5 uses for sure.

To get an accurate measurement, you have to measure the voltage with a 4 ohm load on it, which equals the compressor. I penetrate the positive lead (safety pin usually) and measure to ground for voltage.

There have been some control modules that, when there is no load on the clutch circuit (clutch unplugged) will measure 9.5 volts, but it will drop to essentially zero when plugged in.
 

DanG144

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Aug 2, 2007
Location
Chapin, South Carolina, USA
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2005 A4 Jetta 5spd
I borrowed a manual last night. Bentley Service Manual 2005, 2006, 2007, 2008. Editorial closing 2/2008.

Controls
SA6 fuse 6 on panel A
SC4 fuse 4 on panel C
SC16 fuse 16 on panel C
SC40 fuse 40 on panel C
SC 46 fuse 46 on panel C

Fans
SA1 200 amp Fuse 1 on fuse panel A (may appear as a solid wire, probably it is a fusible link - this is main power in to the fuse panel A from the alternator.
SA3 50 amp fuse 3 on fuse panel A
SB24 10 amp fuse on fuse panel B

Fuse Panel A and B are located engine compartment left (looks to be outboard the battery), B is the top surface with low amperage fuses, A is the front surface with high amperage metal strip fuses.

Fuse panel C is outboard on the left side of the dashboard.

Some of this control power comes through the J317 power supply relay

The location description for J301 (the Climatic system A/C system and heater control module) is "A/C and heater control panel in center dashboard". It is NOT shown on the referenced figure.

You do have two fans up front, right? Engine code BRM? If not, then the fan fuses differ.

It looks to have 3 connectors on it, a 5 pin, a 16 pin, and a 20 pin. It is too big to be mounted in a relay panel, in all likelihood.

The fans should be turned on, via the ECU, when the G83 radiator temperature switch actuates.

It looks as if all the fan commands come from the ECU. So even the AC controls have to send signals to the ECU when it desires the fans to run.
 
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dougsbug

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Sep 15, 2008
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Fremont, Michigan
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'02 Beetle
DanG144,
How was your luck? I have the same car, '06 Jetta right? with the same problem. No fans running, no compressor running, no AC. Any advice? I checked fuses in engine bay, and on the side of the dash, driver's side. Are there any others?
 

dougsbug

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Sep 15, 2008
Location
Fremont, Michigan
TDI
'02 Beetle
Sheesh. AC is expensive. I took my Jetta to the local shop for a $75 refrigerant fill. The tech called and said, filled but still no go, would I like him to do more diagnostics (1 to 4 hours @$50 per hour.) I said go ahead. They called back and said compressor is bad, (sort of knew that already), and the total bill would be $1,700. I said I would have to wait and picked up the car, $300 lighter.
VW wanted $1,500 to replace the compressor. (Apparently you can't JUST do the compressor, but the evap., drier, etc.)
The German Auto specialist is $1,100.
I don't really know what to do. I can wrench a lot of stuff but AC is pretty well beyound my tools and ability.
Any advice?
Will a VAG-COM turn on the AC compressor? Will it be able to tell me what is keeping the system from working.

My original goal was to determine what was wrong with my system.
 

TDI2some

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Western WA
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2005 PassatTDI GLS, 2003 Audi A4q 1.8t, 1975 Rabbit (waiting for TDI transplant)
Have seen issues with the A/C pressure switch G65. If you have Climatronic, VAG-com may give you a compressor cut-off code which would point you in at least some direction:
http://img.photobucket.com/albums/v489/Audiman21/accodes.png?t=1245467803

Lemme know if you cant see the pic through link....

BTW- You DO have a sufficient charge in your system, correct?
 
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caper7

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Jan 23, 2006
Location
Sydney , Nova Scotia
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2013 highline ,2006 jetta tdi
Hi Dan thanks for the information i ended going out of town for a week and left laptop home so sorry slow to respond. I will check the fuses all out
 

CTSmith

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Joined
May 1, 2006
Location
North Texas
TDI
2010 Jetta
Hi guys. Misery loves company. I happened along DanG144's post about checking fan operation and was struck by his description of the terminal part of the disease. It sounded remarkably familiar. I checked my fans and was greeted by silence. No fans and no compressor engagement.

Its an 06 Jetta, manual climate control. The static system pressure at 84F measured 6.5 bars so the charge seems right on. The compressor shows no signs of venting either. All the fuses I've checked (thanks for the list Dan) are good with no signs of excess heating. Both fans seem utterly dead. The A5s have one connector for both fans and all combinations on the connector pins show infinite resistance. I've pulled the fan set and separated the two fans at the connector on the back side. Once isolated, the small fan shows infinite resistance. And when I short that fans two pins, I still cannot see it at the big connector leading me to believe that as all the lines run into the big fan, it must really be FUBARed. Are there any resistance values for the G65 sensor or do you diagonse its failure by elimination of other possibilities?

Does anybody know if there is an interlock that prevents the compressor from engaging if the ECU cannot "see" the cooling fans? The Bentley manual on DVD isn't the easiest thing to find stuff on but I'll keep looking for these answers. Not doing really anything but interstate driving might save my compressor. At least thats the hope. When I get a resolution, I'll post it as well. Help gratiously accepted.

Charlie
 
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DanG144

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Aug 2, 2007
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Chapin, South Carolina, USA
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2005 A4 Jetta 5spd
Charlie,
So your compressor does engage at highway speeds, but disengages at slow speeds or stops? If so then I would guess your G65 is good.

You can check the G65 by measuring its output with a duty cycle meter (best) or a DC voltmeter (really rough check). You can look on your DVD for which wire to read as positive and put the negative lead to ground. It is the wire that goes to the ECU and the AC Controller from the G65. My best guess is to use the same data as in the A4 air conditioning troubleshooting for expected readings vs. pressure.

The fan controller is built into the big fan and often fails. You can try to run the small fan directly on 12 volts. If you get the polarity backwards it will just run backwards, no big deal.

Sorry that I cannot provide details.
 

Murf300

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Joined
Aug 28, 2001
Location
Tallahassee, Fl
TDI
2006 Jetta DSG
I also have a 2006 Jetta TDI. A/C cools partially at highway speeds, went to a/c shop and he said he thought it was the smaller of the two fans. Not coming on when a/c turned on.

I pulled the shroud and two fan assembly tonight and the big fan will run great from a 12 volt battery. The small would turn very slowly if I got it started with my hand. Looks like I have a bad fan. Looked all over online for a replacement but most of the listings are for 2005 models. Found a listing for 2006 for ACM brand or Siemens. The ACM is only 150 watts, Siemens is 200w, and I figure I need all of the air movement I can get in sunny Florida. The rub is the best prices I have found on the Siemens are only about $30 better than the dealer and no one can tell me how long it will take to get it here. I guess I am headed to the dealer tomorrow morning and can have it in 2 days.

The money will be worth it, it has been 100 degrees plus for 7 days in a row, and I am sweating my ass off.

Pat
 

CTSmith

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Joined
May 1, 2006
Location
North Texas
TDI
2010 Jetta
DanG144 said:
Charlie,
So your compressor does engage at highway speeds, but disengages at slow speeds or stops? If so then I would guess your G65 is good.

You can check the G65 by measuring its output with a duty cycle meter (best) or a DC voltmeter (really rough check). You can look on your DVD for which wire to read as positive and put the negative lead to ground. It is the wire that goes to the ECU and the AC Controller from the G65. My best guess is to use the same data as in the A4 air conditioning troubleshooting for expected readings vs. pressure.

The fan controller is built into the big fan and often fails. You can try to run the small fan directly on 12 volts. If you get the polarity backwards it will just run backwards, no big deal.

Sorry that I cannot provide details.
Thanks Dan. Your summary is good. I get a small amount of cooling at highway speeds so the compressor has to be engaging at least somewhat but it does not appear to engage at all when I checked it in the garage the other night. When I checked the small fan leads with my VOM yesterday, it showed infinite resistance. Still, I'll try jumping it to see if it shows any signs of life. No duty cycle meter so my VOM will have to do. Thanks for your assistance.

Charlie
 

CTSmith

Active member
Joined
May 1, 2006
Location
North Texas
TDI
2010 Jetta
Murf300 said:
I also have a 2006 Jetta TDI. A/C cools partially at highway speeds, went to a/c shop and he said he thought it was the smaller of the two fans. Not coming on when a/c turned on.

I pulled the shroud and two fan assembly tonight and the big fan will run great from a 12 volt battery. The small would turn very slowly if I got it started with my hand. Looks like I have a bad fan. Looked all over online for a replacement but most of the listings are for 2005 models. Found a listing for 2006 for ACM brand or Siemens. The ACM is only 150 watts, Siemens is 200w, and I figure I need all of the air movement I can get in sunny Florida. The rub is the best prices I have found on the Siemens are only about $30 better than the dealer and no one can tell me how long it will take to get it here. I guess I am headed to the dealer tomorrow morning and can have it in 2 days.
Pat
Pat,

You might check here: https://www.1stvwparts.com/

I dont know what you paid but they list the right fan for $190 plus shipping.

Charlie (in the same boat as you) Smith
 

DanG144

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Joined
Aug 2, 2007
Location
Chapin, South Carolina, USA
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2005 A4 Jetta 5spd
CTSmith said:
Thanks Dan. Your summary is good. I get a small amount of cooling at highway speeds so the compressor has to be engaging at least somewhat but it does not appear to engage at all when I checked it in the garage the other night. When I checked the small fan leads with my VOM yesterday, it showed infinite resistance. Still, I'll try jumping it to see if it shows any signs of life. No duty cycle meter so my VOM will have to do. Thanks for your assistance.

Charlie
Once refrigerant pressure gets too high it will lock out the compressor. The fans should be running at high speed when this occurs.

Dan
 
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