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  #13  
Old 08-12-2012, 05:02 PM
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Re: a/c only from defrost vents

i would check for a vacuum leak
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  #14  
Old 08-12-2012, 05:33 PM
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Re: a/c only from defrost vents

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Originally Posted by SvenskaJeepGuy View Post
i would check for a vacuum leak
Unfortunately, I believe mine is run off of electric rather than vacuum. It would be easier if it were vacuum related!!
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  #15  
Old 08-13-2012, 08:42 AM
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Re: a/c only from defrost vents

Quote:
Originally Posted by SvenskaJeepGuy View Post
i would check for a vacuum leak
The manual AC system works on vacuum actuators, except the one blend door actuator, which is electrical.
The AZC AC system however has 4 electrical actuators.
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Old 08-13-2012, 08:51 AM
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Re: a/c only from defrost vents

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Originally Posted by jrsummersill1 View Post
These are pics from under the dash, under the ac. There is an opening. Do you think that this is the arm for the mode door?
Hi Jenny, yes, that is one of the arms for the mode doors. I have never opened up the HVAC housing myself, but i think that there are several mode doors connected to each other with some levers and arms and with one actuator. The attached picture i had send before shows that. The actuator itself must be not that far above the lever shown on your picture. Donīt know if you would be able to move the lever by hand without removing the actuator, but give it a try.
Edit: Just had a look at my jeep and with a small miror i was able to see the actuator just 15 cm above the white lever on your picture. But to access this actuator you will need to remove the center instrument panel (see one of the previous attachments on how to).
Just an other general tip, there are tons of information and tips for our WJīs on the following site; www.wjjeeps.com.
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  #17  
Old 08-15-2012, 06:02 PM
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Re: a/c only from defrost vents

Once again, Frank, thanks for all of your assistance!! Today I was able to proceed a little further. I removed the cover under the steering wheel and had a much better view of the actuator. I find that it may still be a challenge to remove as two screws are behind a thick metal structure, but my brother and I are going to try to do it tomorrow. While I had the semi access to it today, I once again turned the ignition on and turned on the a/c and flipped back and forth from regular air to defrost. I watched the actuator and attached arms and never noted any sounds or movement from the actuator. I am attaching a couple of more pics I took today. I will let you know what occurs tomorrow. If you have any additional thoughts or advice, please share!! Jenny
Attached Images
File Type: jpg 100_0316.jpg (513.9 KB, 14 views)
File Type: jpg 100_0314.jpg (520.0 KB, 14 views)
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  #18  
Old 08-15-2012, 08:05 PM
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Re: a/c only from defrost vents

I am going through the same issue. The actuator works intermittently, I now have it blowing out the main vents but it was stuck just coming out the floor. Are you able to give part number on the actuator? and more details as you go through this.

Kevin
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  #19  
Old 08-15-2012, 09:20 PM
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Re: a/c only from defrost vents

It could be that the mode door is just stuck and doesnīt let the actuator move, but i would expect a little movement of the mechanism at least or some sound that it wants to do something. Strange also that you got a fault code of travel too large, when its not even moving. When you disconnect the battery for 10 min. and try again, will it do something then? I believe that it will deenergize the actuator after some time when it doesnīt stop running (travel too large), but i donīt know if it would reset itself after ignition off or not.
To rule out any problems with the control electronics, you could also override the control part and force each actuator separately with the use of the following procedure and also look at the state of each actuator:

While in the display fault code mode of operation,
current system parameters can also be monitored
and/or forced. Rotating the left side set temperature
control clockwise will increase the pointer number
while rotating the control counter clockwise will
decrease the pointer number. Rotating the right set
temperature control will have no impact on pointer
value or the value of the parameter being monitored.
Once the desired pointer number has been selected,
pressing either the AC or Recirc buttons will display
the current value of the selected parameter.
The
right side set temperature display is only capable
of displaying only values ranging from 0 to
99, the left side set temperature display is used
for values greater than 99. If the value is less
than 99, the left side set temperature display
remains blanked.
While a parameter is being overridden,
the system will continue to function normally
except for the parameter which is being manually
controlled.
For values < 0, the
Gsegment in the left side set
temperature Most Significant Digit (MSD)(or leftmost
number in the pair) will be used to indicate a
negative number. For values between -01 to -99 the
Least Significant Digit (LSD)(or right-most number
of the pair) in the left side set temperature will
remain blank. System control of parameter being displayed
can be overridden by rotating the right set
temperature control in either direction. Rotating the
right temperature control in the CW direction, the
selected parameter value is overridden and incremented
beginning at the value which was being displayed.
Rotating the right temperature control in the
CCW direction, the selected parameter value is overridden
and decremented beginning at the value
which was being displayed. The rate at which incrementing
and decrement occurs is one unit value per

set temperature detent position.

To look at the mode motor state, you have to select the mode value pointer 29 with the left temperature selector. The value shown on the right temperature display means the following:
0 = in position, 1 = moving
toward panel, 2 = moving
toward defrost, 3 = searching
range, 4 = stalled moving
toward panel, 5 = stalled
moving toward defrost

When you select the mode value pointer 22 with the left temp selector, you can move the mode door actuator with the right temperature selector.

Success x Frank.
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  #20  
Old 08-16-2012, 09:04 AM
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Re: a/c only from defrost vents

It's not always just the doors that give problems. The troubleshooting procedures Frank has suggested are very important to finding your real problem or problems. It would be a shame to take out the dash, replace the doors, put it all back together and then find out you still have a problem. Taking out the dash and fixing it right is a good idea, but it's not an easy task even if the "stealership" is doing it for you. So do your troubleshooting first to be sure you have a good handle on the problem or problems. I have read where some will replace both the heater core and evaporator coil while in there just as a precaution. If either of those components goes bad, it's dash out again, either expensive or time consuming.
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Old 08-16-2012, 09:32 AM
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Re: a/c only from defrost vents

Quote:
Originally Posted by Me Fix View Post
It's not always just the doors that give problems. The troubleshooting procedures Frank has suggested are very important to finding your real problem or problems. It would be a shame to take out the dash, replace the doors, put it all back together and then find out you still have a problem. Taking out the dash and fixing it right is a good idea, but it's not an easy task even if the "stealership" is doing it for you. So do your troubleshooting first to be sure you have a good handle on the problem or problems. I have read where some will replace both the heater core and evaporator coil while in there just as a precaution. If either of those components goes bad, it's dash out again, either expensive or time consuming.
Me Fix,

I have no intention of removing the dashboard just yet. I am will to live with the a/c coming from the defrost vents for now. But I am going to try to see if it's just the actuator first.

Jenny
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Old 08-16-2012, 10:13 AM
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Re: a/c only from defrost vents

Quote:
Originally Posted by Frango100 View Post
It could be that the mode door is just stuck and doesnīt let the actuator move, but i would expect a little movement of the mechanism at least or some sound that it wants to do something. Strange also that you got a fault code of travel too large, when its not even moving. When you disconnect the battery for 10 min. and try again, will it do something then? I believe that it will deenergize the actuator after some time when it doesnīt stop running (travel too large), but i donīt know if it would reset itself after ignition off or not.

Frank,

I never did disconnect the batttery. What I did was remove the IOD fuse to recalibrate the doors when I first started this venture. It appeared that when I did this to have the same effect as disconnecting the battery (the clock and the radio had to be reset). This is how I did the recalibration:

Calibrating AZC door actuators

Calibrate the door actuators after making any repairs to the AZC system. To calibrate the door actuators proceed as follows: 1. Turn the ignition on.
2. Set the AZC to automatic.
3. Turn the ignition off.
4. Remove the IOD fuse from the Power Distribution Center. Wait several seconds, and then install the IOD fuse.
5. Turn the ignition on. Do not touch any of the AZC controls for at least one minute to allow the calibration function to run to completion.

I can try disconnecting the battery today when I work on it.

Jenny
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  #23  
Old 08-16-2012, 02:55 PM
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Re: a/c only from defrost vents

I'm not sure if removing the IOD fuse will erase the memory of the AZC system.
At least it will not hurt a thing to disconnect the battery for 10 min or so and it could be that the mode actuator will start turning again until it times out. At least then you know if the actuator is still doing something or that it is inoperative.
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  #24  
Old 08-16-2012, 08:52 PM
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Re: a/c only from defrost vents

Ok, it's been quite the afternoon!! First, we disconnected the battery as you suggested, Frank, for about ten minutes and reconnected it. No change in the a/c.

Next we removed the actuator and manually maneuvered the arms and voila!, we had air out of the front vents!! This means the mode door must not be broke!

Then we took apart the actuator and made sure all of the gears inside were ok and not broken and manually maneuvered them and they were ok. We then put two pieces of wire in to the connector where the wire harness fits and put a 9 volt batter to the wires and the actuator worked!! We switched the battery around for reverse polarity and it worked in both directions.

That leads us to believe that the actuator is not getting any power from the power harness....now I'm stuck again. We tried to look at the wiring diagrams in the back of the book, and couldn't really tell. There is a beigish colored wire with a stripe and a solid yellow wire coming into the wire harness. My brother thought that perhaps it was not getting any power from the switch in the center console and we took that part out, but could never find a solid yellow wire. We did see the beige colored wire with the stripe, though. Anyone have any experience in this? Is there a fuse that could be blown. I looked at the fuse diagrams, but not sure it is one of them, but my brother said it must be being powered from somewhere--a fuse, a relay, etc. We are stuck.

Frank, we also noted now that the air is coming out of the front vents, that it is definitely blowing stronger on the driver's side. It's blowing on the passenger side as well, but you can that there is a difference. Is this due to the blend doors?


Thanks,
Jenny
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