I just received the durametric tool from another member (thanks!), and went through the sections to read codes.
In the Air Conditioning section here is what I read:

AIR CONDITIONING:
Part Number 11
Diagnosis Number 11
Current Fault Codes:
353 - Feedback from blower regulator front - Value below lower limit value
2600 - Temperature flap servo motor rear right

Here is what I have been observing wrt air condition on the ctt lately:
(This is regarding the 4 zone ac on my car):

When i start he car and turn on ac, the driver side (front and rear) feel nice and cold, but the passenger side (front and rear) feel much warmer.
If the temp is moderate outside (low/mid 70s, all seems fine and I can feel colder air from pass sides, but it is still warmer than driver side). On those cooler days, the pass side vents do seem to almost catch up to the driver side coldness, but not quite, and not always.

It appears to me that something is not right and wanted to see if someone can help troubleshoot. the heat is not far away here in TX and i would like it resolved before then.
Where do i start, whac can be suspect, etc. looking forward to having this resolved.

 

Clear the codes and run the climate control again. See what codes reappear.

You can also test the servo motors, fans etc, using the drive links test on the Durametric.

 

Cool. Will try to do asap and will post results here.

BTW, any way you can use durametric to create a report of all subsystems, listing status of each and any fault codes? This way, I would not have to have my car ignition on for extended durations while playing with the various options.

Thanks.

 

OK. Got more info.
I reset the fault codes on Air Conditioner.
The only code that returned was code 2600 Temperature flap servomotor rear right.

Also, I measured the temps out of the 4 main outlets:
Ambient outside temp: 72F
AC condition: Set to Mono, LO, automatic (full blast), air recirculation, all windows closed and all doors closed.

Measured temp of air coming out of the two front center vents, and out of the two rear center vents:

FT LT - 51F
FT RT - 71F
RR LT - 55F
RR RT - 71F

So looks to me that the right side of the car is blowing air much warmer than teh left side. If anyone can hep trboubleshoot for root cause, I would greatly appreciate it.

 

Did you driver link test the right rear temp servo?

 

i did not (I assume). I do not know how to use the sw to test the servo motors. All i know is I went to the actual values section in Air condition and was able to read some values. Can you explain how I would go about testing the ac stuff with the durametric? Thanks for any help.

 

From those temps you posted, it looks like your rear right and front right temp servos are not controlling the temps correctly.

 

so how do I run the driver link test on the servos in question with the durametric tool?

 

Here is a link to the Durametric manual.
http://www.durametric.com/Durametric...ion_Manual.pdf

Take the time to read it as there are some cautions that you should be aware of.

 

so i did the tests on air con.
keep seeing the same code 2600...temperature flap servo motor rear right.
Does this mean that the servomotor for rear right side of car is not operating right, and allows hot air to mix with the cold when it is not suppposed to?
From what I learned the cold air is mixed on the way out the vent and the servomotors control the mixing.

Given the measurements of temps I provided, and the code and explanation, would it be a safe bet to say repacement of this servomotor is in order?

Anyone done this, who could give me pointers? I think I would also need a part number to ensure I get the right servomotor.

Again, I can't stress enough how much I appreciate the help.

 

Try running the system test under the A/c heating sub menu.
You should be able to see the valve position info when the test is running.

 

is it safe to assume 134a pressure is ok since the temps on left side of the car are ok? Would this point specifically to the servos as the culprit for increased temp on right side of the car?

From what I heard, the air is cooled by AC, then it is warmed with assistance of these servos. Trying to nail down the source of issue here.

When running these tests, what am I to be looking for here (related to the servos and values)?

Thanks.

 

I would definitely get the R134A charge level checked. A low charge often shows up as driver's side cool and passenger side not. Anybody who can check the charge level should also be able to do at least a basic leak test or use leak detection dye to find a leak in the future.

 

Would that be something I would have to go to the dealer for? I would hope that this is a typical AC charge up issue, which could be a job for any decent ac shop.

Also, in addition to code 2600 being back, code 353 is back too. To refresh:
353 - Feedback from blower regulator front - Value below lower limit value
2600 - Temperature flap servo motor rear right

Anyone can talk about the code 353 or 2600, what it means and likelyhood of pinpoint of issue based on symptoms/info in this thread?

Great thanks again.

 

If I know outside temp and hook up AC gauges to hi and low, is there a ballpark pressure I should be seeing on the lines? This could tell me that AC is indeed low on charge. Trying to see how I can do this myself. I have done AC work on other cars before but wonder if an experienced AC person here can provide guidance on charge/pressure I should be seeing. The car is an 05, so it is natural that it may need a recharge by now.