Test 3 Low Pressure Check

Fig. 5 A/C Performance Test Diagnostic Table:

1. Connect suitable High/Low pressure gauge set to service valves, if not previously connected.
2. Set air distribution to instrument panel outlets.
3. Set temperature control to Full Cold.
4. Set Blower to low speed (1st. position).
5. Start engine, then turn On A/C with NORM A/C button.
6. Raise engine speed to 1500 RPM, maintain during test.
7. System low pressure should drop to about 22-38 psi in less than 30 seconds.
8. If results are not as expected perform "Test 1" and "Test 2", then compare results with table.