Cooling Insufficient, A/C System - GMC chevrolet camaro 2000 Service Manual

HVAC
Heating, Ventilation and Air Conditioning 1-7
Cooling Insufficient, A/C System
)
A/C System Pressure - Zone Classification Graph
(kPa) (Psi)
690 100
621
90
552 80
483 70
414 60
Q)
"O
Cf.)
345 50
~
...J
276 40
207 30
138
20
69
10
)
iOO 200 300 400
(Psi)
690 1379 2069
2750
(kPa)
High Side
590674
Cooling Insufficient, A/C System
Step Action Value(s) Yes
No
The following test measures the air conditioning (A/C) system operating efficiency by comparing the following:
• The ambient air temperature
• The ambient air humidity
• The pressure at the high-pressure side of the refrigeration system
• The pressure at the low-pressure side of the refrigeration system
• The temperature of the air being discharged into the passenger compartment
"
1. Park the vehicle inside or in the shade.
2. Open the windows in order to ventilate the interior of
the vehicle.
3. If the engine is at operating temperature, allow the
engine to cool.
4. Ensure that the ignition key is in the OFF position.
1
5. Install J 39500-8.
345 kPa (50 psi)
6. Record the readings of the low and high side STATIC
pressures.
The low and high side pressure readings should be
)
almost equal to each other once the system has
come to rest.
Are both the low and high side pressures above the
Go to Leak
specified value? Go to Step 2 Testing.