LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (A/C-Heater System - Manual) >> Testing >> A/C System Performance

A/C System Performance

WARNING: This page is about a different car, the 1994 Eagle Vision, 1994 Dodge Intrepid, 1994 Chrysler New Yorker, 1994 Chrysler LHS, and 1994 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
  1. Park vehicle out of direct sunlight. Ambient air and vehicle temperatures must be greater than 70°F (21°C). Ensure ambient air temperature reading agrees with overhead console temperature display (if equipped). If temperature difference is significant, A/C system performance results could be affected. Install a tachometer and compressor manifold gauge set. Start engine and allow it to run at 1000 RPM with A/C turned off.
  2. Close all vehicle doors and windows. After initial compressor cycling, turn A/C on and hold engine at 1000 RPM. Turn mode door selector to RECIRCULATION position. Turn temperature selector to full cold position. Turn fan control switch to high blower position. System is okay if temperature and system pressures are as specified. See A/C SYSTEM PERFORMANCE TEMPERATURE SPECIFICATIONS  and A/C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS  tables.
A/C SYSTEM PERFORMANCE TEMPERATURE SPECIFICATIONS

Ambient Temp. °F (°C) Outlet Vent Temp. °F (°C)
70 (21.1) 45 (7.0)
80 (26.7) 49 (9.4)
90 (32.2) 54 (12.2)
100 (37.8) 56 (13.3)
110 (43.3) 59 (15.0)
A/C SYSTEM PERFORMANCE PRESSURE SPECIFICATIONS

Ambient Temp. °F (°C) High Side psi (kg/cm2 ) Low Side psi (kg/cm2 )
70 (21.1) 112-210 (7.9-14.8) 10-37 (.7-2.6)
80 (26.7) 131-214 (9.2-15) 17-38 (1.2-2.7)
90 (32.2) 180-215 (12.7-15.1) 21-47 (1.5-3.3)
100 (37.8) 203-288 (14.3-20.2) 28-51 (2-3.6)
110 (43.3) 232-331 (16.3-23.3) 30-53 (2.1-3.7)