Compressor Clutch: Testing and Inspection
1. INSPECT COMPRESSOR FOR METALLIC SOUNDa. Start the engine.
b. Check if there is metallic sound from the compressor when the A/C switch is on.
If metallic sound is heard, replace the compressor assembly.
2. INSPECT REFRIGERANT PRESSURE
3. INSPECT VISUALLY FOR LEAKAGE OF REFRIGERANT FROM SAFETY SEAL
Using a gas leak detector, check for leakage of refrigerant. If there is any leakage, replace the compressor assembly.
4. INSPECT COMPRESSOR LOCK SENSOR
5. MAKE THESE VISUAL CHECKS:
a. Leakage of grease from the clutch bearing.
b. Signs of oil on the pressure plate or rotor.
If necessary, repair or replace.
6. INSPECT MAGNETIC CLUTCH BEARING FOR NOISE
a. Start the engine.
b. Check for abnormal noise from near the compressor when the A/C switch is OFF.
If abnormal noise is being emitted, replace the magnetic clutch.
7. INSPECT MAGNETIC CLUTCH
a. Disconnect the connector from the magnetic clutch.
b. Connect the positive (+) lead from the battery to the terminal 4 and the negative (-) lead to the body ground.
c. Check that the magnetic clutch is energized.
If operation is not as specified, replace the magnetic clutch.