a/c clutch wont engage.Replace pcm because of another problem, you can jump the relay and get the compressor to come on,and blows cold.
Jul 23, 2015 at 9:15 AM
2003 Dodge Caravan a/c
JOESHOUSE74
- MEMBER
- 1 POST
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There are a couple things that can cause this but if the compressor works when you jump the relay then we have an issue with the relay or the control side.
If the PCM is new and this issue was there prior to that then the PCM is being told to not turn the relay on for the compressor.
This means we need to check the pressure in the system and find out if the pressure is correct.
https://www.2carpros.com/articles/re-charge-an-air-conditioner-system
If the pressure is correct, then the issue is most likely the pressure sensor. This is a 3-wire sensor so it tells the PCM what the pressure is and the PCM determines if the compressor should be on or off. Other pressure sensors are on off switches, and they can be jumped. This cannot.
Let's start with the pressure and go from there.
Thanks
If the PCM is new and this issue was there prior to that then the PCM is being told to not turn the relay on for the compressor.
This means we need to check the pressure in the system and find out if the pressure is correct.
https://www.2carpros.com/articles/re-charge-an-air-conditioner-system
If the pressure is correct, then the issue is most likely the pressure sensor. This is a 3-wire sensor so it tells the PCM what the pressure is and the PCM determines if the compressor should be on or off. Other pressure sensors are on off switches, and they can be jumped. This cannot.
Let's start with the pressure and go from there.
Thanks
Images (Click to enlarge)
May 9, 2022 at 12:46 PM
Well, since the vehicle had electrical problems starting from the ECM backwards. Because it worked fine before the wiring harness fried. And I didn't keep it simple. (Over complicating everything) It was the darn transducer. $500.00 later. Lol
May 9, 2022 at 12:46 PM
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