Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21pl9 ciavn13
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DIAGNOSTICS - NAVIGATION SYSTEM 05FGW-04
ABNORMAL NOISE OCCURS
INSPECTION PROCEDURE
1 CHECK SPEAKERS
(a) Check the speaker installation conditions.
(1) Check that each speaker is securely installed.
OK: Each speaker is securely installed.
HINT:
The radio is equipped with a noise prevention system that blocks excessively loud noise. If such noise oc-
curs, check that all wiring is proper and that the antenna installation part ground and noise-prevention equip-
ment are installed.
Conditions Under Which Noise Occurs Noise Type
Noise increases when the accelerator pedal is depressed, but stops when
Generator noise
the engine is stopped.
Noise occurs during A/C or heater operation. Blower motor noise
Noise occurs when the vehicle accelerates rapidly on an unpaved road or
Fuel pump noise
after the ignition switch is turned on.
Noise occurs when the horn switch is pressed and released or when pressed
Horn noise
and held.
Quiet noise occurs while the engine is running, but stops when the engine is
Ignition noise
stopped.
Noise occurs synchronously with the blink of the turn signal. Flasher noise
Noise occurs during window washer operation. Washer noise
Noise occurs while the engine is running, and continues even after the engine
Water temperature sensor noise
is stopped.
Noise occurs during wiper operation. Wiper noise
Noise occurs when the brake pedal is depressed. Stop light switch noise
Others Static electricity stored on the vehicle
HINT:
S First ensure that the noise is not coming from the outside. Failure to do so makes noise source detec-
tion difficult and may lead to a misdiagnosis.
S Noise should be removed in descending order of loudness.
NG REINSTALL SPEAKER PROPERLY
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1286 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1508
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