Suzuki 2006 SX4, Service Manual

Page: 881 / 1478

Air Conditioning System: Manual Type 7B-16
Abnormal Noise from Condenser Assembly
Abnormal Noise from Crankshaft Pulley
Abnormal Noise from Tension Pulley
Abnormal Noise from A/C Evaporator
Abnormal Noise from Blower Motor
Condition Possible cause Correction / Reference Item
Considerable vibration in
condenser assembly Resonance from condenser assembly
bracket and body Firmly insert a silencer between condenser
assembly bracket and body.
Condition Possible cause Correction / Reference Item
A large rattling noise is
heard at idle or sudden
acceleration Loosen crankshaft pulley bolt Retighten bolt.
Condition Possible cause Correction / Reference Item
Clattering noise is heard
from pulley Worn or damaged bearing Replace tension pulley.
Pulley cranks upon
contact Cracked or loose bracket Replace or retighten bracket.
Condition Possible cause Correction / Reference Item
Whistling sound is heard
from A/C evaporator Depending on the combination of the
interior / exterior temperatures, engine
rpm and refrigerant pressure, the
refrigerant flowing out of the expansion
valve may, under certain conditions,
make a whistling sound At times, slightly decreasing refrigerant volume
may stop this noise.
Inspect expansion valve and replace if faulty.
Condition Possible cause Correction / Reference Item
Blower motor emits a
chirping sound in
proportion to its speed of
rotation Worn or damaged motor brushes or
commutator Replace blower motor.
Fluttering noise or large
droning noise is heard
from blower motor Leaves or other debris introduced from
fresh air inlet to blower motor Remove debris and make sure that the screen
at fresh air inlet is intact.