Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21pl9 cinavi64
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05-1375
DIAGNOSTICS - NAVIGATION SYSTEM 05NRH-01
AVC-LAN CIRCUIT (RADIO AND NAVIGATION ASSY - STEREO
COMPONENT AMPLIFIER ASSY)
CIRCUIT DESCRIPTION
Each unit of the radio and navigation system connected to the AVC-LAN (communication bus) communi-
cates by transferring the signals from each switch.
When a short to +B or short to ground occurs in this AVC-LAN, the radio and navigation system will not func-
tion normally as communication is discontinued.
In the AVC-LAN, the radio and navigation assy becomes the communication master and has enough resis-
tance necessary for communication.
WIRING DIAGRAM
Stereo Component Radio and
Amplifier Assy Navigation Assy
8 5
LG-B
TX+ S11 R15 ATX+
7 15
LG-R
TX- S11 R15 ATX-
I45235
INSPECTION PROCEDURE
1 INSPECT RADIO AND NAVIGATION ASSY
Wire Harness View: (a) Disconnect the radio and navigation assy connector R15.
ATX+ (b) Measure the resistance according to the value(s) in the
table below.
R15
Standard:
Tester connection Condition Specified condition
ATX+ - ATX- Always 60 to 80
ATX-
I39066
NG REPLACE RADIO AND NAVIGATION ASSY
(SEE PAGE 67-9 )
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1558
05-1376
DIAGNOSTICS - NAVIGATION SYSTEM
2 CHECK HARNESS AND CONNECTOR(RADIO AND NAVIGATION 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
ATX+
ATX+ - TX+ Always Below 1
ATX- - TX- Always Below 1
ATX- I38652 ATX+ - Body ground Always 10 k or higher
ATX- - Body ground Always 10 k or higher
Stereo Component Amplifier Assy
Wire Harness View:
S11
TX+ TX- NG REPAIR OR REPLACE HARNESS OR
I42747 CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART
(SEE PAGE 05-1278 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1559
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