Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21pl9 cinavi68
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05-1383
DIAGNOSTICS - NAVIGATION SYSTEM 05NRJ-01
MUTE SIGNAL CIRCUIT (RADIO AND NAVIGATION ASSY -
STEREO COMPONENT AMPLIFIER ASSY)
CIRCUIT DESCRIPTION
This circuit sends a signal to each component to mute noise. Because of that, noise produced by changing
the sound source ceases.
In addition, this circuit is used to mute sound when the navigation system performs voice guide.
If there is an open in the circuit, noise can be heard from the speakers when changing the sound source.
When the vehicle is equipped with a navigation system, audio sound keeps coming out from the speaker
on the driver's side while the voice navigation is in operation.
If there is a short in the circuit, even though the stereo component amplifier assy is normal, no sound or only
an extremely small sound can be produced.
WIRING DIAGRAM
Stereo Component Radio and
Amplifier Assy Navigation Assy
1 7
GR-B
MUTE S11 R15 MUTE
I45240
INSPECTION PROCEDURE
1 INSPECT STEREO COMPONENT AMPLIFIER ASSY
Wire Harness View: (a) Measure the voltage according to the value(s) in the table
below.
S11 Standard:
Tester connection Condition Specified condition
Turn ignition switch to
MUTE - Body ground ACC, Audio system is Above 3.5 V Below 1 V
playing Changing mode
MUTE OK PROCEED TO NEXT CIRCUIT INSPECTION
I42746
SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1286 )
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1566
05-1384
DIAGNOSTICS - NAVIGATION SYSTEM
2 CHECK HARNESS AND CONNECTOR(RADIO AND NAVIGATOIN ASSY - STEREO
COMPONENT AMPLIFIER ASSY)
Radio and Navigation Assy (a) Disconnect the radio and navigation assy connector R15
Wire Harness View: and stereo component amplifier assy connector S11.
R15 (b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connection Condition Specified condition
MUTE - MUTE Always Below 1
MUTE - Body ground Always 10 k or higher
MUTE I38652
Stereo Component Amplifier Assy
Wire Harness View: S11
NG REPAIR OR REPLACE HARNESS OR
MUTE I42747 CONNECTOR
OK
3 REPLACE STEREO COMPONENT AMPLIFIER ASSY (SEE PAGE 67-23 )
(a) Replace the stereo component amplifier assy and check if it operates normally.
OK: The navigation system operates normally.
OK NORMAL OPERATION
NG
REPLACE RADIO AND NAVIGATION ASSY (SEE PAGE 67-9 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1567
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