Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21pl9 cirsa22
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05-1377
DIAGNOSTICS - NAVIGATION SYSTEM 05FHJ-04
AVC-LAN CIRCUIT (RADIO AND NAVIGATION ASSY - STEREO
COMPONENT CONTROLLER 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
R24
Stereo Component Radio and
Controller Assy Navigation Assy
10 16 9
LG LG P
TX+ BK2 IH3 R14 TXM+
14
11 17 10
W W V
TX- BK2 IH3 R14 TXM-
15
I45231
INSPECTION PROCEDURE
1 INSPECT RADIO AND NAVIGATION ASSY
Wire Harness View: (a) Disconnect the radio and navigation assy connector R14.
(b) Measure the resistance according to the value(s) in the
table below.
R14 Standard:
Tester connection Condition Specified condition
TXM+ - TXM- Always 60 to 80
TXM- TXM+ I39065
NG REPLACE RADIO AND NAVIGATION ASSY
(SEE PAGE 67-9 )
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1560
05-1378
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 R14
Wire Harness View: and stereo component amplifier assy connector R24.
(b) Measure the resistance according to the value(s) in the
table below.
R14 Standard:
Tester connection Condition Specified condition
TXM+ - TX+ Always Below 1
TXM- - TX- Always Below 1
TXM- TXM+ I38655 TXM+ - Body ground Always 10 k or higher
TXM- - Body ground Always 10 k or higher
Stereo Component Controller Assy
Wire Harness View:
R24
TX- NG REPAIR OR REPLACE HARNESS OR
TX+ I35035 CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART
(SEE PAGE 05-1278 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1561
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