ABNORMAL NOISE OCCURRING FROM A/C COMPRESSOR [FULL-AUTO AIR CONDITIONER]

id0703c1702800

Malfunction symptom

Abnormal noise occurring from A/C compressor
Description
•  Abnormal noise occurring from near A/C compressor during A/C operation
•  Abnormal noise occurring from near A/C compressor regardless of A/C operation
•  Occasional abnormal noise occurring from near A/C compressor during A/C operation
Possible cause
•  Magnetic clutch malfunction
•  Drive belt malfunction
•  A/C compressor malfunction
•  Hose, system piping malfunction
―  Clip removal
―  Poor installation
―  Interference with hose, system piping malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT A/C COMPRESSOR FOR SLIPPAGE NOISE
•  Is there a squeaking or whirling sound (A/C compressor slippage noise)?
Yes
Go to Step 4.
No
Go to the next step.
2
INSPECT A/C COMPRESSOR FOR INTERFERENCE NOISE
•  Is there a rattling or vibrating sound (interference noise)?
Yes
Go to Step 7.
No
Go to the next step.
3
INSPECT A/C COMPRESSOR VANE FOR NOISE
•  Is there a jingling, popping, beeping, or buzzing sound (A/C compressor vane noise)?
Yes
Replace the magnetic clutch, then perform the repair completion verification.
(See MAGNETIC CLUTCH DISASSEMBLY/ASSEMBLY.)
No
Normal (Verify malfunction symptom.)
4
INSPECT DRIVE BELT
•  Inspect the drive belt.
•  Is it normal?
Yes
Go to the next step.
No
After adjusting the drive belt tension, go to the next step.
(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
5
INSPECT DRIVE BELT
•  Is there drive belt deterioration, foreign matter penetration in the belt, or oil on the belt?
Yes
Remove obstruction, remove oil, or replace drive belt, then perform the repair completion verification.
(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
No
Go to the next step.
6
INSPECT MAGNETIC CLUTCH
•  Inspect the magnetic clutch.
•  Is the magnetic clutch normal?
Yes
Replace A/C compressor (excluding pressure plate, A/C compressor pulley, and stator), then perform the repair completion verification.
(See A/C COMPRESSOR REMOVAL/INSTALLATION.)
No
Replace the magnetic clutch, then perform the repair completion verification.
(See MAGNETIC CLUTCH DISASSEMBLY/ASSEMBLY.)
7
VERIFY LOCATION OF ABNORMAL NOISE OCCURRENCE
•  Does abnormal noise occur from the A/C compressor?
Yes
Visually inspect A/C compressor, replace appropriate parts if necessary, then perform the repair completion verification.
(See A/C COMPRESSOR REMOVAL/INSTALLATION.)
(See MAGNETIC CLUTCH DISASSEMBLY/ASSEMBLY.)
No
If abnormal noise occurs from the hose or system piping, perform repairs in the area causing interference with the hose or system piping due to clip removal or screw looseness, then perform the repair completion verification.
Repair completion verification
VERIFY THAT MALFUNCTION DOES NOT RECUR AFTER REPAIRS
•  Is the abnormal noise occurring from the A/C compressor cleared?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW.)
If the CAN communication is normal, perform the diagnosis from Step 1.