C. Performance Test Procedure

Review Safety Precautions and Warnings before proceeding with this procedure. Air temperature of the test area and inside the vehicle must be 70°F (21°C) minimum for this test.

1. Connect a tachometer and A/C manifold gauge set.

2. Set control to A/C, PANEL, and RECIRC or MAX A/C, with the temperature control at "full cool" and blower on "high".

3. Start engine and hold at 1,000 RPM with A/C clutch engaged.

4. Engine should be at normal operating temperature and all doors and windows closed.

5. Insert a thermometer in the left center A/C outlet and operate the engine for twenty minutes. The A/C clutch may cycle depending on ambient conditions.

6. With the A/C clutch engaged, compare the discharge air temperature to the A/C Performance Temperature chart provided.

7. If the discharge air temperature or discharge and suction pressure are not within the specified range, refer to the diagnostic procedure in the appropriate Service Manual.