Performance Test Procedure: Notes

WARNING: This page is about a different car, the 2004 Dodge Grand Caravan, 2004 Dodge Caravan, and 2004 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: REFER TO THE APPLICABLE WARNINGS AND CAUTIONS FOR THIS SYSTEM BEFORE PERFORMING THE FOLLOWING OPERATION (Refer to WARNING ) and (Refer to CAUTION ).

NOTE: When connecting the service equipment coupling to the line fitting, verify that the valve of the coupling is fully closed. This will reduce the amount of effort required to make the connection.

Connect a tachometer and a manifold gauge set.
Set the mode control to the Recirculation Mode position, the temperature control to the full cool position and the blower to the highest speed position.
Start the engine and hold at 1,000 rpm with the A/C compressor clutch engaged.
The engine should be warmed up to operating temperature with the doors closed and windows open.
Insert a thermometer in the driver's side center panel A/C-heater outlet and operate the engine for five minutes.
If the compressor clutch does not engage, proceed with diagnosis of the compressor clutch coil. (Refer to A/C COMPRESSOR CLUTCH/COIL ).

With the A/C compressor clutch engaged, compare the air temperature at the center panel outlet and the compressor discharge pressure to the A/C Performance Temperature and Pressure chart. The compressor clutch may cycle, depending upon the ambient temperature and humidity. If the clutch cycles, use the readings obtained before the clutch disengaged.

A/C PERFORMANCE TEMPERATURE AND PRESSURE

Ambient Temperature	21° C (70° F)	27° C (80° F)	32° C (90° F)	38° C (100°F)	43° C (110° F)
Left Center Panel Outlet Discharge Air Temperature	1 to 8° C (34 to 46° F)	3 to 9° C (37 to 49° F)	4 to 10°C (39 to 50° F)	6 to 11°C (43 to 52° F)	7 to 18° C (45 to 65° F)
Discharge Pressure (High Side Service Port)	1034 to 1724 kPa (150 to 250 psi)	1517 to 2275 kPa (220 to 330 psi)	1999 to 2620 kPa (290 to 380 psi)	2068 to 2965 kPa (300 to 430 psi)	2275 to 3421 kPa (330 to 450 psi)
Suction Pressure (Low Side Service Port)	103 to 207 kPa (15 to 30 psi)	117 to 221 kPa (17 to 32 psi)	138 to 241 kPa (20 to 35 psi)	172 to 269 kPa (25 to 39 psi)	207 to 345 kPa (30 to 50 psi)

If the air outlet temperature fails to meet the specifications in the A/C Performance Temperature and Pressure chart, or if the compressor discharge pressure is high. Refer to the PRESSURE DIAGNOSIS Chart.