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05-1371
DIAGNOSTICS - NAVIGATION SYSTEM 05NRG-01
SPEAKER CIRCUIT (NAVIGATION VOICE)
CIRCUIT DESCRIPTION
This circuit is used when the voice guidance in the navigation system is on.
WIRING DIAGRAM
Stereo Component Radio and
Amplifier Assy Navigation Assy
23 11
R
INT+ S11 R13 IVO+
22 12
G
INT- S11 R13 IVO-
13
R13 SLD1
(Shielded)
6 2 3
P P B P
FL+ S10 IF2 IA2
1 3
T8
1 F17
Front No.2 Front No.1
Speaker Speaker
Assy LH 2 Assy LH
17 6 4
V V Y V
FL- S10 IF2 IA2
2 4
I45241
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1554
05-1372
DIAGNOSTICS - NAVIGATION SYSTEM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR(RADIO AND NAVIGATION ASSY - STEREO
COMPONENT AMPLIFIER ASSY)
Radio and Navigation Assy (a) Disconnect the radio and navigation assy connector R13
Wire Harness View: and stereo component amplifier assy connector S11.
(b) Measure the resistance according to the value(s) in the
table below.
R13 Standard:
Tester connection Condition Specified condition
IVO+ - INT+ Always Below 1
IVO- - INT- Always Below 1
IVO+
IVO- I38660 IVO+ - Body ground Always 10 k or higher
IVO- - Body ground Always 10 k or higher
Stereo Component Amplifier Assy
Wire Harness View:
S11
INT+ NG REPAIR OR REPLACE HARNESS OR
INT- I42747 CONNECTOR
OK
2 INSPECT FRONT NO.1 SPEAKER ASSY (LEFT SIDE)
(a) Disconnect the speaker connector F17.
(b) Resistance check.
(1) Measure the resistance between the terminals of the speaker.
NOTICE:
The speaker should not be removed for checking.
Standard: 4 to 6
NG REPLACE FRONT NO.1 SPEAKER ASSY
(SEE PAGE 67-1 1)
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1555
05-1373
DIAGNOSTICS - NAVIGATION SYSTEM
3 CHECK HARNESS AND CONNECTOR(FRONT NO.1 SPEAKER ASSY - FRONT
NO.2 SPEAKER ASSY)
Front No.2 Speaker Assy (a) Disconnect the front No.2 speaker assy connector T8.
Connector Front View: (b) Measure the resistance according to the value(s) in the
table below.
T8 Standard:
Tester connection Condition Specified condition
T8-3 - F17-1 Always Below 1
T8-4 - F17-2 Always Below 1
T8-4 - Body ground Always 10 k or higher
I38999
T8-3 - Body ground Always 10 k or higher
Front No.1 Speaker Assy
Connector Front View:
F17
NG REPAIR OR REPLACE HARNESS OR
I38233 CONNECTOR
OK
4 INSPECT FRONT NO.2 SPEAKER ASSY
(a) Inspect by changing the right one with the left one, and vice versa.
OK: Malfunction disappears.
HINT:
Connect all connectors of the speakers.
OK REPLACE FRONT NO.2 SPEAKER ASSY
(SEE PAGE 67-12 )
NG
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1556
05-1374
DIAGNOSTICS - NAVIGATION SYSTEM
5 CHECK HARNESS AND CONNECTOR(STEREO COMPONENT AMPLIFIER ASSY-
FRONT NO.2 SPEAKER ASSY)
Stereo Component Amplifier Assy (a) Disconnect the stereo component amplifier assy connec-
Wire Harness View: tor S10 and front No.2 speaker assy connector T8.
(b) Measure the resistance according to the value(s) in the
S10 table below.
Standard:
FL+ Tester connection Condition Specified condition
FL+ - T8-1 Always Below 1
FL- - T8-2 Always Below 1
FL- I42748 FL+ - Body ground Always 10 k or higher
FL- - Body ground Always 10 k or higher
Front No.2 Speaker Assy
Connector Front View:
T8
NG REPAIR OR REPLACE HARNESS OR CONNEC-
I38999 TOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1286 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1557
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