Abnormal Noise Symptom Diagnosis Of A/C System - Suzuki Swift Sport 2004 Service & Repair Manual

Condition
Insufficient airflow of
cooled air

Abnormal Noise Symptom Diagnosis of A/C System

Abnormal Noise from Compressor
Condition
During compressor
operation, a rumbling
noise is heard
proportional to engine
revolutions
A loud noise is heard at a
certain rpm,
disproportionately to
engine revolution
A loud rattle is heard at
low engine rpm
Abnormal Noise from Magnetic Clutch
Condition
A rumbling noise is heard
when compressor is not
in operation
A chattering noise is
heard when compressor
is in operation
Abnormal Noise from Tubing
Condition
A droning noise is heard
from inside of the vehicle,
but not particularly
noticeable in engine
compartment
Abnormal Noise from Condenser Assembly
Condition
Considerable vibration in
condenser assembly
Abnormal Noise from Crankshaft Pulley
Condition
A large rattling noise is
heard at idle or sudden
acceleration
Possible cause
A/C evaporator clogged or frosted
Air leaking from HVAC unit or air duct
Blower motor faulty
Wiring or grounding faulty
Possible cause
Inadequate clearance in scroll area
Loose or faulty compressor drive belt
Loose compressor mounting bolts
Loose compressor clutch plate bolt
Possible cause
Worn or damaged bearings
Faulty magnet clutch clearance
(excessive clearance)
Worn magnet clutch friction surface
Compressor oil leaked from shaft seal,
contaminating the friction surface
Possible cause
Faulty tubing clamps
Resonance caused by pulsation from
variations in refrigerant pressure
Possible cause
Resonance from condenser assembly
bracket and body
Possible cause
Loosen crankshaft pulley bolt
Air Conditioning System: Manual Type 7B-9
Correction / Reference Item
Check A/C evaporator and evaporator
thermistor (evaporator temperature sensor)
referring to "Evaporator Inspection" and
"Evaporator Thermistor (Evaporator
Temperature Sensor) Inspection".
Repair as necessary.
Check blower motor referring to "Blower Motor
Inspection in Section 7A".
Repair as necessary.
Correction / Reference Item
Replace compressor.
Adjust drive belt tension or replace drive belt.
Retighten mounting bolts.
Retighten clutch plate bolt.
Replace compressor if it was operated in this
condition for a long time.
Correction / Reference Item
Replace magnet clutch assembly.
Adjust magnet clutch clearance.
Replace magnet clutch assembly.
Replace compressor body assembly.
Correction / Reference Item
Reposition clamps or increase the number of
clamps.
Attach a silencer to tubing, or modify its
position and length.
Correction / Reference Item
Firmly insert a silencer between condenser
assembly bracket and body.
Correction / Reference Item
Retighten bolt.
S7RS0B7214002