I have a 2007 Dodge Nitro and like a lot of people that iv seen since researching have a problem with my a/c working when it wants to. U have too start the engine up in the morning and you will hear compressor engage and then go off. u then hv to kill the engine and restart over and over again and all of a sudden it will stay on. It seems that once its running u can count on it coming on again as long as it doesn't sit for very long. My wife goes thru this process every morning and then again in the afternoon after getting off work. I am a HVAC tech. by trade but have limited experience with vehicles. I have had guages on it and the pressures look good when its running and will cool the cabin space with no problem so im guessing its not a refrigerent problem. If anyone has any info that you would mind sharing with me it would be greatly appreciated. Thank you......Jason
Connected guages and checked refrigerent
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-027-08, DATEDJUNE 24, 2008, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONSARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE AN ADDITIONAL MODELYEAR ALONG WITH AN UPDATED SYMPTOM/CONDITION.THE StarSCAN® FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROMTHE INTERNET.StarSCAN® SOFTWARE LEVEL MUST BE AT RELEASE 9.01 OR HIGHER FOR THISBULLETIN.StarMOBILE STANDALONE MODE OR StarMOBILE DESKTOP CLIENT MAY ALSOBE USED TO PERFORM THIS PROCEDURE.SUBJECT:
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-027-08, DATED
JUNE 24, 2008, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS
ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE AN ADDITIONAL MODEL
YEAR ALONG WITH AN UPDATED SYMPTOM/CONDITION.
THE StarSCAN® FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM
StarSCAN® SOFTWARE LEVEL MUST BE AT RELEASE 9.01 OR HIGHER FOR THIS
StarMOBILE STANDALONE MODE OR StarMOBILE DESKTOP CLIENT MAY ALSO
BE USED TO PERFORM THIS PROCEDURE.
Flash: Torque Converter Shudder Or Erratic AC Performance Or AC Intermittently Blows
Warm Air During Drive Cycle
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
**2007** - 2008 (KA) Nitro
2008 (KK) Liberty
NOTE: This bulletin applies to the above listed vehicles equipped with a 3.7L engine
(sales code EKG) built before June 17, 2008 (MDH 0617XX).
Some customers may experience one or more of the following:
A. Torque converter shudder on A/C engagement and disengagement or torque
converter shudder on torque converter pull-ins or during a partial lock operation.
Pull-ins are when the torque converter goes from unlock to a partial lock or a full lock
condition. This condition affects vehicles equipped with automatic transmissions
B. **Erratic AC performance or AC intermittently blows warm air during drive cycle.
running. This condition will only affect vehicles equipped with automatic
Using a Scan Tool (StarSCAN®) with the appropriate Diagnostic Procedures available in
TechCONNECT, verify all engine systems are functioning as designed. If DTC's are
present record them on the repair order and repair as necessary before proceeding further
with this bulletin.
If the vehicle operator describes or experiences the Symptom/Condition, perform the
Qty. Part No. Description
1 04275086AB Label, Authorized Modification
SPECIAL TOOLS / EQUIPMENT REQUIRED:
NPN Battery Charger
CH9401 StarSCAN® Tool
CH9404D StarSCAN® Vehicle Cable
CH9409 StarSCAN® Documentation Kit
CH9410 StarSCAN® Ethernet Cable, 12 ft.
CH9412 StarSCAN® Software Update Device Kit
TechCONNECT PC or equivalent
REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE:
NOTE: Before performing this Repair Procedure, the operating software in the
StarSCAN® must be programmed with software release level 9.01 or higher.
The software release level is visible in the blue header at the top of the
NOTE: The StarSCAN® diagnostic scan tool fully supports Internet connectivity.
However, to take advantage of this feature you must first configure the
StarSCAN® for your dealership's network. Make sure the StarSCAN® is
configured to the dealership's network before proceeding. For instruction on
setting up your StarSCAN® for the dealer's network refer to either:
"DealerCONNECT > Service > StarSCAN and StarMOBILE tools > Online
Documentation", or refer to the StarSCAN® Quick Start Networking Guide.
The StarSCAN® Quick Start Networking Guide is also available on the
www.dcctools.com website under the "Download Center".
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
18-027-08 REV. A -2-
1. Reprogram the PCM with the latest software. Follow the detailed service procedures
available in DealerCONNECT/TechCONNECT, Refer To Group 8 - Electrical >
Electronic Control Modules - Service Information > Module - Powertrain Control >
Standard Procedures > PCM/ECM Programming - Gas.
2. Type the necessary information on the "Authorized Modification Label" and attach it
near the VECI label.
Reimbursable within the provisions of the warranty.
Chrysler Master Tech 10+ Years of A/C and Electrical and Body Mechanical
Do not have any problems with the blower at all. I have noticed that when compressor engages the RPM shoot up and take longer than usual for it to slow back down to idle. I am certainly not the best car mechanic but it seems as though the vehicile idles at very low RPM. I have attempted to raisethe RPM on start up to c if this would help compressor engage but I will be holding it steady at 2000 and when compressor engauges it runs up and u cant maintain a steady RPM.I wanted you to know this as I failed to include in last post. Is there a recall on this or something? Also is this something that I can repair myself? Thank you again for your time and knowledge on this matter. I would be happy to return the favor if you have any problems with your A/C system at home....................Jason
Curb idle should be between 550 and 700 rpm. If you wanted to try something else the pressure switch on the liquid line just as it comes out of the fire wall. you could replace that switch and that may take care of it. give me the last 8 of the vin and i will see if there are any recalls.
7W554165 is the vin #. Could you tell me if it is a high pressure switch or wht the proper name is XXXXX XXXXX part your talking about? I purchased that same part I believe when I first started but didnt end up putting it on so I took it back to Auto Zone. I cant remember for the life of me what it was called. I checked the curb idle and it was around 600 to 700. When the comp. engages it idles up quite a bit and takes some time for it to idle back down. Usually when you rev the engine it will drop immediatly but not this. I dont ever drive the car so I couldnt tell you if it has always done that.
The idle sounds about right, the name of the switch is pressure transducer
I will try replacing the transducer you mentioned just as a shot in the dark. So if that doesn't wrk Im guessing it will have to be hooked up to computer system u mentioned earlier. Is there not any recalls?
,I will try replacing the transducer you mentioned just as a shot in the dark. So if that doesn't wrk Im guessing it will have to be hooked up to computer system u mentioned earlier. Is there not any recalls?
Need the last 8 of the vin
I sent it in one of my prior messages! 7W554165 is last 8night #s in case u didn't get it! Thanks
There is a recall J28 wiper relay recall. Does not have anything to do with the a/ c