GMC chevrolet camaro 2000 Service Manual page 122

Table of Contents

Advertisement

HVAC
Heating, Ventilation and Air Conditioning
1..;25
Noise Diagnosis -.A/C System (cont'd)
Step
Action
Value(s)
Yes
No
1. A/C compressor clutch engaged and engine idling
in PARK.
2. Using a stethoscope, check the A/C compressor drive
9
belt tensioner pulley for any abnormal noises.
3. Turn the ignition switch to the OFF position.
-
4. Check the tensioner for proper spring load
Is the tensioner pulley operating normally with proper
Go to Step 11
Go to Step 10
tension and without noise?
Replace the A/C compressor drive belt tensioner/tensioner
pulley as needed. Refer to Drive Belt Tensioner
10
Replacement in Engine Mechanical - 3.8 L or Drive Belt
-
-
Tensioner Replacement - A/C in Engine
Mechanical - 5.7 L.
Is the repair complete?
Go to Step 30
11
Is the A/C compressor locked up?
-
Go to Step 12
Go to Step 13
1. Recover the refrigerant.
2. Replace the A/C compressor.
12
Refer to Compressor Replacement (3.8 L) or
-
-
Compressor Replacement (5. 7 L).
Is the repair complete?
Go to Step 31
1. Recover the refrigerant.
2. Remove the A/C compressor clutch coil.
Refer to Compressor Clutch Coil Removal·
)
(VS - Conventional Mount) or Compressor Clutch Coil
13
Removal (V7 - Direct Mount).
-
-
3. Install the compressor clutch coil.
Refer to Compressor Clutch Coil Install
(VS - Conventional Mount) or Compressor Clutch Coil
Install (V7 - Direct Mount).
Is the repair complete?
Go to Step 31
14
Does a moaning noise exist when the A/C clutch is
-
engaged?
Go to Step 15
Go to Step 23
1.
Connect an R-134a manifold gage set to the low and
high side service ports on the vehicle refrigerant
system.
2. Increase and maintain the engine speed at
2000 RPM, in PARK.
15
3. Engage the A/C clutch.
4. Check the low and high side refrigerant pressures.
-
5. Compare the pressure readings to those listed in the
Cooling Insufficient, A/C System.
Refer to Cooling Insufficient, AIC System.
Are the high and low side refrigerant pressures withiri the
normal specified limits?
Go to Step 17
Go to Step 16
1.
Recover the refrigerant, evacuate and charge the
refrigerant system to specifications.
2. Start the engine and allow the engine to idle
16
in PARK.
-
3. Engaged the A/C compressor clutch.
Does the moaning noise exist when the A/C clutch is
engaged?
Go to Step 32
Go to Step 17
Inspect the A/C compressor mounting, idler pulley, and
)
17
tensioner for concerns using a stethoscope.
-
Are any of these components loose, damaged or
excessively worn?
Go to Step 18
Go to Step 19

Advertisement

Table of Contents
loading

This manual is also suitable for:

Pontiac firebird 2000

Table of Contents