Air conditioner did work now not

Tiny
GEORGE101010
  • MEMBER
  • 2003 SATURN L200
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
Has over 100lbs static pressure. Recently had collision and repair to front left side. Compressor does not ever try to move. All control inside work but indicates temperature of 0 degrees Centigrade. It has a rubber hose hooked to the back of the same temp/fan selector. What does that hose do? Why won't the ac work?
Do you
have the same problem?
Yes
No
Monday, June 9th, 2014 AT 6:41 AM

16 Replies

Tiny
WRENCHTECH
  • EXPERT
It's an electrical issue that needs to be tracked down using a test light, professional scan tool and a wiring diagram. We can't be much help unless you have the equipment and the electrical understanding to read a wiring diagram.
Was this
answer
helpful?
Yes
No
Monday, June 9th, 2014 AT 7:28 AM
Tiny
GEORGE101010
  • MEMBER
I have a very good understanding of electricity and a good volt/ohm meter. I used a CAR MD device to check for codes and found none reported and all good. I don't know about the device your referred to as a scan tool.
I was hoping the info about the ac control showing 0 C degrees might seem familiar to an experienced Saturn auto ac tech.
I changed that temp/fan control device but the new one reads the same.
Was this
answer
helpful?
Yes
No
Monday, June 9th, 2014 AT 7:38 AM
Tiny
GEORGE101010
  • MEMBER
I someone received my recent reply there has been a considerable lapse of time I am still waiting.
My reply could only address the tech's answer stating roughly that If I need to have special equipment and tech skills. I assured Wrenchtech of a list attempting to correlate with those specs but no reply.
This is my first encounter with 2Car and while I am willing to reward helpful answers, I chose the free answer first and was assured that was appropriate by tech support as there would be a route available to pay after subsequent dialogue.
If all you've got is "Don't ask me if you're not a tech", then I understand the missing second reply.
Was this
answer
helpful?
Yes
No
Monday, June 9th, 2014 AT 8:46 AM
Tiny
WRENCHTECH
  • EXPERT
No, what you need to understand is that we are employed techs that volunteer out SPARE time. I have a job that get first attention.

Your CarMD isn't going to tell you much at all.This system uses a 5v reference pressure sensor that sends specific pressure readings to the PCM which control the compressor relay and you need a scan tool that can tell you what pressures the PCM is seeing and whether it's even seeing an AC on request and whether it thinks it has turned it on..

https://www.2carpros.com/images/external/150797106.gif
Was this
answer
helpful?
Yes
No
Monday, June 9th, 2014 AT 11:29 AM
Tiny
GEORGE101010
  • MEMBER
I indeed need to understand a lot. The site mentioned contributing money for some of these answers. I guess that will make us all volunteers when I finally wrangle enough info from those whose job it is not to answer what has been asked.
I appreciate the schematic. Call me an amateur but I see a DIODE. Could it be defective? A secret only a pro-tech would know. How much current would it take to test the diode? Would the Ohm setting be too strong? What about the display I mentioned indicating 0 degrees Centigrade? Seems an experienced tech would recognize this mysterious display if indeed he had ever seen it before.
So if the ONLY way to skin this cat is to determine if the expected operation of all those devices involved is to use a scanner then a tech in a hurry would on his way out the door to work helpfully reply "don't do that" or "your not qualified to ask so I'm not going to lift a finger to help figure this out or even address all your questions".
This is not the only site that involves itself with the alleged prospect of helping plain old folks figure out possible answers to difficult problems say on an 11 year old car A/C. Now if we think the computer may be at fault but ignore the existence of the fan module, the cycling switch, the clutch and other mechanically testable devices because a SCANNER would be easier then who needs an experienced tech.
Was this
answer
helpful?
Yes
No
Monday, June 9th, 2014 AT 6:44 PM
Tiny
WRENCHTECH
  • EXPERT
I don't need the sarcasm. I'm telling you how this problem has to be approached to isolate the cause. If my advise isn't what you want to hear, then i'm sorry.
Was this
answer
helpful?
Yes
No
Monday, June 9th, 2014 AT 7:00 PM
Tiny
GEORGE101010
  • MEMBER
No, I'll be sorry. I am still looking for a good tech that can think outside the scanner. There are a number of givens (worked well recently, accident occurred and was repaired recently on the left front side, the control display shows 0 degrees Centigrade, the static pressure of the refrigerant is above 100 lbs, all other indicators present themselves as a fully functional A/C) and my favorite given of all, there are a FINITE number of devices that can cause these symptoms should one decide to consider such factors.
I sure wish I could ask a tech if the wreck damaged the fan module which I discovered is located by the battery on the LEFT FRONT side where the accident was and if that device could have the effect of allowing the display to look normal except for the 0 degrees Celsius part.
I wish the same for - if there was a way to mechanically(volt meter) test the cycling device that has 3 terminals not two?
Signed. Still looking.
Please folks, no more volunteer techs for me. They seem too dependent on expensive high tech equipment. This isn't NASA its a 2003 Saturn. Its a very nice car but my daughter got hit in it and the adjuster wanted to total it over a $2500.00 repair. What do you think a high priced A/C shop would do. There is a reason why folks like us come here looking for thoughtfully applied LOGIC and reasonable consideration, you know, compassion. Its my gamble and my money(for the best possible answer), how about it. Is this the best 2carpros can do?
Was this
answer
helpful?
Yes
No
Monday, June 9th, 2014 AT 7:42 PM
Tiny
TY ANDERSON
  • EXPERT
Has over 100lbs static pressure. Recently had collision and repair to front left side. Compressor does not ever try to move. All control inside work but indicates temperature of 0 degrees Centigrade. It has a rubber hose hooked to the back of the same temp/fan selector. What does that hose do? Why won't the ac work?

It sounds like you have enough refrigerant in the system.
The ambient temp sensor usually controls this display. This sensor is located on the left front side (attached picture).
The rubber hose on the back of the Temp/fan is a vacuum switch which redirects vacuum various part of the air conditioning system.
Removed the a/c relay in the under hood fuse box and identify which two terminal to short or in other words bypass the relay. With the engine running and the a/c on this should cause the compressor clutch to engage and spin. If it doesn't let me know and we can go from there.
If there was impact damage to the left front of the vehicle it is possible the ambient temperature sensor or wiring is damaged. Google search "03 saturn l200 ambient temperature sensor" under the shopping tab to identify what to look for in that area. It will have 2 or 3 wires going to this sensor.
Let me know what you find.
Was this
answer
helpful?
Yes
No
Monday, June 9th, 2014 AT 9:18 PM
Tiny
GEORGE101010
  • MEMBER
Thank You Tech Anderson. I'm extremely skilled, under-tooled, and very mechanically talented. I appreciate your response and I'll get right on it. When my daughter gets home I'll search the car for what I find on Google.
I am told I need to ask another question to get to the contributions page so there will be an unrelated question to follow then later I'll send a response to let you know what I found on the a/c subject.
Was this
answer
helpful?
Yes
No
Tuesday, June 10th, 2014 AT 7:39 AM
Tiny
TY ANDERSON
  • EXPERT
No problem. Let me know what you find.
About the contributions page I'm not sure? I will send out an email an for any info.
Was this
answer
helpful?
Yes
No
Tuesday, June 10th, 2014 AT 1:27 PM
Tiny
GEORGE101010
  • MEMBER
After the accident I argued with the insurance folks who walked around the vehicle (literally) and overestimated the damage. They didn't involve the body shop owner. I did. All I asked was to make it presentable and safe to drive for my daughter. I believe he did.
I noticed a few brackets missing under the hood like the small ones that steady the radiator. I can make them.
When she drove the car home today I looked for the ambient air temperature sensor and found a black plastic wire harness with two wires sticking out of it that had been taped.
As I stated before, the A/C worked before the accident. I can get another sensor but I doubt if I can find the socket. Now I really need your skills.
The temperature in Houston almost never gets below 0 degrees Centigrade and I understand it is a safety in that case and perhaps important for the heater. If I knew electrically how it signaled the system I might be able to satisfy the logic question being asked by the A/C for now. I will eventually find or make a socket but two wires must be workable in the hot environment we live in down here.
What's the chance you can help me figure this out. All I ask is to make it comfortable for my daughter to drive for now. I'm not the kind of guy that continually puts things off I complete them very well.
Was this
answer
helpful?
Yes
No
Tuesday, June 10th, 2014 AT 4:32 PM
Tiny
TY ANDERSON
  • EXPERT
This system is networked with the body control module (BCM) a/c (HVAC) module and power train control module (PCM). These modules use the ambient temp sensor for other running conditions but as it relates to the A/C system it uses the ambient temp sensor to prevent the evaporator from freezing over. So without the sensor connected & functioning properly the a/c system is shut down until the issue is corrected. The resources we have do not specify what exactly is happening electrically. There are two wires one black and the other light blue. The black wire connects to terminal B and light blue connects to terminal A. The ambient temp sensor is a variable resistor.

We've been able to get sockets from the dealer as a repair kit. It comes with the socket fully assembled and usually comes with crimp connectors or butt connector with heat shrink wrapping. If know what the ambient temp sensor electrical connector looks like or end up buying a sensor you can match it up over the internet or take the sensor with you to the dealership match up.
Hope this helps and answers your questions.
Was this
answer
helpful?
Yes
No
Tuesday, June 10th, 2014 AT 7:56 PM
Tiny
GEORGE101010
  • MEMBER
Yes that helps and I'll get out of crosswire and simple rig mode and get the sensor and finish fixing the air conditioner. I will first go back to the body shop and try to wrangle this snipped off part back from them. It was obvious today that they just cut it out of their way to remove the damaged fender and other parts then taped up the two wires.
I do thank you very much. Now I know I will succeed. I completed the contribution but forgot to indicate your name but I immediately contacted support and was assured all would be taken care of.
Thank you.
Was this
answer
helpful?
Yes
No
Wednesday, June 11th, 2014 AT 12:35 AM
Tiny
TY ANDERSON
  • EXPERT
Thank you.
Let me know if this fixes it.
Was this
answer
helpful?
Yes
No
Wednesday, June 11th, 2014 AT 1:20 PM
Tiny
GEORGE101010
  • MEMBER
I found the sensor at a GM warehouse and the socket with pigtails at Orielly's. The A/C console now reads the ambient temp and the compressor turns on and works fine. Thank you for your experience and consideration.
Was this
answer
helpful?
Yes
No
Thursday, June 12th, 2014 AT 9:50 PM
Tiny
TY ANDERSON
  • EXPERT
Fantastic! I don't always hear back from the people I talk to so thank you for your reply. Happy to hear the a/c is working again.
Was this
answer
helpful?
Yes
No
Friday, June 13th, 2014 AT 9:11 AM

Please login or register to post a reply.

Recommended Guides