A/C - Compressor Noise/Poor Cooling/Window Fogging
Classification:HA07-005a
Reference:
NTB07-050a
Date:
September 20, 2007
VERSA / SENTRA; A/C PERFORMANCE /
COMPRESSOR NOISE / WINDOW FOGGING
This bulletin has been amended. The APPLIED VEHICLES, ACTION, CLAIMS INFORMATION, and SERVICE PROCEDURE sections have changed. Please discard all previous versions of this bulletin.
APPLIED VEHICLES:
2007-2008 Versa (C11)
2007-2008 Sentra (B16)
IF YOU CONFIRM
One of the Applied Vehicles has:
^ Poor A/C cooling as defined in the PERFORMANCE CHART Test section, ATC chapter of the appropriate Electronic Service Manual (ESM).
OR
^ Noisy A/C compressor.
OR
^ Window Fogging.
ACTION
Refer to the Service Procedure to determing the correct course of action.
IMPORTANT:
^ This bulletin is to address an incident, if it should occur, where the system is low due to lack of initial fill during vehicle manufacture.
^ If the system is low due to leaks, or there is any other incident other than lack of initial fill, standard Warranty practices apply outside the focus of this bulletin.
CLAIMS INFORMATION
Submit a Primary Operation (P0) line claim using the claims coding shown.
SERVICE PROCEDURE
NOTE:
If needed, Operator Instructions for the ACR2OO5 can be found in ASIST Information Tool Box under Tools & Equipment > Equipment Operator Manuals > ACR5 User Manual. Your ASIST must be connected to the Internet to access this document.
1. Set the car heater to maximum temperature, maximum blower, and recirculate. DO NOT run the A/C system. Start the engine and allow it to reach operating temperature.
NOTE:
This step allows the A/C system temperature and oil to stabilize for maximum refrigerant recovery accuracy.
2. Turn the ignition "OFF".
3. From the ACR2005 MAIN MENU enter RECOVER. Follow the on-screen prompts to connect the machine to the vehicle.
4. When the display reads RECOVER COMPLETE, press RESTART RECOVERY to remove any additional refrigerant.
5. Once the system stabilizes and holds a vacuum, note the vacuum amount and how long it held.
SPECIFICATION: 28" Hg held after 10 minutes at sea level altitude*.
> If the system can reach this specification, there are no leaks. Proceed to step 6.
> If the system cannot reach this specification, the system has leaks and this bulletin does not apply. Return to the ESM for further diagnostic information.
*Depending on your altitude, you may not be able to achieve 28 Hg. For this reason, it is important that the altitude setting in the ACR2005 Setup Menu is correct for your location. The ACR2005 used this information to calculate and provide an equivalent set point for your altitude. (For instance, at 7000 feet, the ACR pulls 21 Hg before completing an evacuation.)
6. Print the RECOVER results and attach it to the Repair Order for future reference. Note how much refrigerant was recovered and check it against the specification:
SPECIFICATION: Refrigerant capacity of HFC-134a (R-134a):
^ Versa: 0.45 kg +/- 0.05 (0.99 lb +/- 0.11)
^ Sentra: 0.50 kg +/- .05 (1.10 lb +/- 0.11)
> If the system refrigerant fill level is out of specification and there are no leaks recharge the system to specification, then proceed to step 6.
> If the system refrigerant fill level is not out of specification or has leaks, this bulletin does not apply. Return to the ESM for further diagnostic information.
CAUTION:
Do Not Overfill the system with either refrigerant or oil. Due to system design, system performance will not increase and may decrease if there is too much refrigerant or oil in the system.
7. Inspect for a leak after the system is fully charged and has operated for a minimum of 5 minutes.
8. Re-inspect for compressor noise after system has operated for 5-10 minutes to allow oil to evenly circulate in A/C system.
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