Volkswagen Passat 1995 Official Factory Repair Manual page 4203

A/C refrigerant system, troubleshooting
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Test 3: A/C system low pressure, checking
- Connect high- and low-pressure hoses of
refrigerant recovery/recycling/recharging unit
4
Kent-Moore ACR , or equivalent, to high- and
low-pressure service valves.
- Start engine.
- Set temperature control to maximum "cold".
- Press "A/C" button and select first blower
speed.
- Adjust air distribution to instrument panel
outlets.
- Raise engine speed to 1500 RPM.
Specified result
System low pressure is normal if low-pressure
gauge reads 22-36 psi (1.5-2.5 bar) within 30
seconds.
If specified reading is not obtained, compare
results of all three tests
110 .
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table, Page 87-
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