GMC chevrolet camaro 2000 Service Manual page 117

t-20 Heating, Ventilation and Air Conditioning
HVAC
Cooling Insufficient, A/C System - Pressure Zone D (cont'd)
Step
Action Value(s)
Yes No
1. Recover the refrigerant.
2. Disconnect the compressor hose from the
compressor.
Refer to Compressor Hose Assembly
14
Replacement (3.8 L) or Compressor Hose Assembly
-
Replacement (5. 7 L).
. 3. Inspect for the presence of heavy debris on the
compressor suction port screen.
Is heavy debris present on the compressor suction port
screen? Go to Step 15 Go to Step 16
1. Remove the debris from the suction port screen.
2. Inspect the orifice for damage, in order to determine if
the debris originated from the high side.
3. If the orifice does not show any signs of damage,
15 inspect the accumulator for damage, in order to
- -
determine if the debris originated from the
evaporator core.
4. Replace any components found damaged.
Is the repair complete?
..
Go to Step 17
Install components or connectors which were removed or
16
disconnected.
- -
Is the action complete? Go to Step 17
1. Evacuate and charge the refrigerant system.
17
2. Leak test the refrigerant system.
- -
Refer to Leak Testing.
Are the operations completed? Go to Step 18
1. Start the engine and allow the engine to idle.
2. With an accurate thermometer still installed to the IP
(
center air outlet.
3.
Set the HVAC control to the following positions:
• A/C button to ON
• Temperature control to full cold
• Mode control knob to UPPER (IP outlets)
• Blower switch to high
4. Elevate and maintain the engine speed at 1000 RPM.
18
5. Allow the low and high side pressure readings to
- -
stabilize, if necessary.
(Stabilization usually requires 2-3 minutes.)
6. Record the low and high pressure readings and the
delivered air output temperature.
7. Compare the low and high side pressures
and the output temperatures to those listed in the
Go to A
A/C Performance Table.
Diagnostic
Refer to Cooling Insufficient, A/C System.
System Check in
Are both t.he low and high side pressures as well as the
HVAC Systems -
output temperatures within specifications? Manual
(