A/C - Noise/Insufficient Cooling

VOLUME
3

GROUP
Climate Control

NUMBER
008

MODEL
Sedona

DATE
April 2005

SUBJECT:
SEDONA A/C DIAGNOSIS AND PERFORMANCE TESTING

This bulletin provides information related to testing and diagnosis of the Sedona Air Conditioning System. Customers may complain of noise or insufficient interior cabin cooling. This technical information will assist in determining the correct procedure for repair of the Air Conditioning System.

CAUTION

^ Air Conditioning refrigerant or lubricant vapor can irritate your eyes, nose or throat.

^ Take care in connecting service equipment.

^ DO NOT breathe refrigerant or vapors.

PRELIMINARY CHECKS:

^ Applicable Technical Service Bulletins, Technician Times or Pitstop Articles

^ Install scan tool and check for current and history codes

^ Check and test A/C fuse

^ A/C blower operation (test all blower speeds)

^ Temperature door operation

^ A/C compressor, pressure switches and thermocon electrical connections

^ Condenser fins for obstructions

^ Cooling fan speed operations (low and high)

^ Check A/C compressor drive belt tension and A/C compressor clutch operation

^ Charging system voltage level and battery condition

^ Check Service Information on Kia Service Information System (KSIS) Repair as necessary, before proceeding to performance test.

PERFORMANCE TEST:

^ Install manifold gauge set to the high and low side service port.

^ Install temperature gauge into dash center vent to monitor output temperatures.

^ Place inside front and rear blower on medium speed.

^ Place a large fan in front of the A/C condenser, this simulates driving conditions with airflow across condenser.

^ Run the engine at 2,000 rpm, monitor high and low side pressures and record. Monitor the inside temperature dash vent gauge and record. See pressure chart.





^ Normal gauge reading are approximately 21-28 psi on the low side (Suction) and 206-213 psi on the high side (Discharge). Pressure readings will vary slightly depending on the ambient temperature and humidity levels.

* NOTICE

SERVICE PRECAUTIONS:

^ When working on A/C systems all equipment must be in good working condition and properly maintained.

^ All weight scales must be in working order and unobstructed to properly charge the A/C system.

^ All refrigerants must be recovered per Federal Law Clean Air Act, any residual refrigerant must be recovered and not released into the atmosphere.

^ Flushing of the A/C system may be required, prior to re-charging the A/C system dependent on contamination of the A/C system. Always flush the A/C system after an internal compressor failure.








PRESSURE DIAGNOSIS CHART:





SYMPTOM DIAGNOSIS:





BASIC A/C REFRIGERANT SYSTEM:





A/C DRIVE BELT:

AFFECTED PRODUCTION RANGE:

2002-2005MY Sedona vehicles.