Suzuki Liana RH413, Service Manual

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Air Conditioning System: Manual Type 7B-10
Abnormal Noise from Tubing
Abnormal Noise from Condenser
Abnormal Noise from Crankshaft Pulley
Abnormal Noise from Tensioner Pulley
Abnormal Noise from A/C Evaporator
Abnormal Noise from Blower Motor
DTC Check
S3RH0A7214005
Refer to “DTC Check in Section 7A”.
DTC Clearance
S3RH0A7214006
Refer to “DTC Clearance in Section 7A”.
DTC Table
S3RH0A7214007
Refer to “DTC Table in Section 7A”.
Fail-Safe Table
S3RH0A7214008
Refer to “Fail-Safe Table in Section 7A”.
Condition Possible cause Correction / Reference Item
Tubing: A droning noise
is heard inside vehicle,
but not particularly
noticeable in engine
compartment. Faulty tubing clamps Reposition clamps or increase the number of
clamps.
Resonance caused by pulsation from
variations in refrigerant pressure Attach a silencer to tubing, or modify its
position and length.
Condition Possible cause Correction / Reference Item
Condenser: Considerable
vibration in condenser. Resonance from condenser bracket and
body Firmly insert a silencer between condenser
bracket and body.
Condition Possible cause Correction / Reference Item
Crankshaft Pulley: A large
rattling noise is heard at
idle or sudden
acceleration. Loosen crankshaft pulley bolt Retighten bolt.
Condition Possible cause Correction / Reference Item
Tensioner Pulley:
Clattering noise is heard
from pulley. Worn or damaged bearing Replace tensioner pulley.
Tensioner Pulley: Pulley
cranks upon contact. Cracked or loose bracket Replace or retighten bracket.
Condition Possible cause Correction / Reference Item
A/C Evaporator: 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: Blower
motor emits a chirping
sound in proportion to its
speed of rotation. Worn or damaged motor brushes or
commutator Replace blower motor.
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.