Page 2337 of 4323
I28593
(Shielded) (Shielded)R22 5
6
3
4
2517
16
19
18
20 R22 R22 R22 IF4 ID2
R22 L+
SGNDW
W
W
W 6
IF4
3
IF4
4
IF4
2
IF4 ID2
ID2
ID2
ID2
(Shielded) R25
Television Display AssyMulti±display
Controller Sub±assy
L±
R+
R±HPL+
SLD1 HPL±
HPR+
HPR± W
W
W
W W
W
W
W5
6
3
4
2
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2135
2329 Author: Date:
2005 SEQUOIA (RM1146U)
Sound signal circuit (Multi±display controller sub±assy ± Televi-
sion display assy)
CIRCUIT DESCRIPTION
This is the sound signal circuit from the television display assy to the multi±display controller sub±assy.
WIRING DIAGRAM
DIDBH±01
Page 2338 of 4323

I28332
Television Display Assy: Multi±display Controller Sub±assy:
HPL± HPL+
HPR+
HPR± SLD1
SGND
R+
R±
L+ L±
R22
R25
DI±2136
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2330 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Multi±display controller sub±assy ± Television
display assy).
PREPARATION:
Disconnect the R22 and R25 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
HPR+ (R22±19) ± R+ (R25±3)AlwaysBelow 1 W
HPR± (R22±18) ± R± (R25±4)AlwaysBelow 1 W
HPL+ (R22±17) ± L+ (R25±5)AlwaysBelow 1 W
HPL± (R22±16) ± L± (R25±6)AlwaysBelow 1 W
SLD1 (R22±20) ± SGND (R25±2)AlwaysBelow 1 W
HPR+ (R22±19) ± Body groundAlways10 kW or higher
HPR± (R22±18) ± Body groundAlways10 kW or higher
HPL+ (R22±17) ± Body groundAlways10 kW or higher
HPL± (R22±16) ± Body groundAlways10 kW or higher
SLD1 (R22±20) ± Body groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2087).
Page 2339 of 4323
I28669
AR+
AR±
AL+
AL±
SG4
(Shielded)R22 6
7
8
9
55
4
3
2
6 R22 R22 R22 R22 R+
R±
L+
L±
SLDW
W
W
W D23
Disc Player ControllerMulti±display
Controller Sub±assy
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2137
2331 Author: Date:
2005 SEQUOIA (RM1146U)
Sound signal circuit (Multi±display controller sub±assy ± Disc
player controller)
CIRCUIT DESCRIPTION
This is the sound signal circuit from the disc player controller to the multi±display controller sub±assy.
WIRING DIAGRAM
DIDBI±01
Page 2340 of 4323

I28330
Disc Player Controller:
Multi±display Controller Sub±assy:
R+L+R± L±
SLD
AL+AR+
AR±SG4AL± D23
R22
DI±2138
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2332 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Multi±display controller sub±assy ± Disc player
controller).
PREPARATION:
Disconnect the R22 and D23 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
L± (D23±9) ± AL± (R22±2)AlwaysBelow 1 W
L+ (D23±8) ± AL+ (R22±3)AlwaysBelow 1 W
R± (D23±7) ± AR± (R22±4)AlwaysBelow 1 W
R+ (D23±6) ± AR+ (R22±5)AlwaysBelow 1 W
SLD (D23±5) ± SG4 (R22±6)AlwaysBelow 1 W
L± (D23±9) ± Body groundAlways10 kW or higher
L+ (D23±8) ± Body groundAlways10 kW or higher
R± (D23±7) ± Body groundAlways10 kW or higher
R+ (D23±6) ± Body groundAlways10 kW or higher
SLD (D23±5) ± Body groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2087).
Page 2341 of 4323

I28592
Multi±display
Controller Sub±assy R25
Television Display Assy
IF49
LG5
TX2+ ID217
R21
LG LG
IF410
LG4
TX2± ID218
R21
LG LG TX+
TX±
LG31
TX+
IF314
R23
L
LG30
TX± IF315
R23
LG TX+ (*1)9
10
9
10 R27 (*1)
Radio and Navigation Assy
R19 (*2)
Radio Receiver Assy
D23
Disc Player Controller
13
TX3± R22
LG
14
TX3+ R22 TX±
TX+18
17
LG
*1: w/ Navigation System
*2: w/o Navigation SystemTX1+ (*2)
TX± (*1)
TX1± (*2)
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2139
2333 Author: Date:
2005 SEQUOIA (RM1146U)
AVC±LAN circuit
CIRCUIT DESCRIPTION
Each unit of this system connected to the AVC±LAN (communication bus) transfers the signal of each switch
by communication.
When a short to +B or short to ground occurs in this AVC± LAN, this system will not function normally as
communication is discontinued.
This system has 2 kinds of AVC±LAN: main AVC±LAN and sub AVC±LAN.
w/ navigation system:
In the main AVC±LAN, the radio and navigation assy becomes the communication master and has enough
resistance necessary for communication.
w/o navigation system:
In the main AVC±LAN, the radio receiver assy becomes the communication master and has enough resis-
tance necessary for communication.
In the sub AVC±LAN, the multi±display controller sub±assy becomes the communication master and has
enough resistance necessary for communication.
WIRING DIAGRAM
DIDBJ±01
Page 2342 of 4323
DI±2140
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2334 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Inspect apparatus.
CHECK:
Choose the apparatus to be inspected.
RESULT:
Television display assyGo to step A
Radio and navigation assy (w/ Navigation System)Go to step B
Radio receiver assy (w/o Navigation System)Go to step C
Disc player controllerGo to step D
B Go to step 4.
C Go to step 6.
D Go to step 7.
A
2 Service check mode (Television display assy).
CHECK:
Perform the service check (See page DI±2099).
Start the diagnosis system and read the check result for the television display assy.
RESULT:
ºNCONº is displayed or result is not displayed (Rr±TV)Go to step A
ºGOODº is displayedGo to step B
HINT:
This system has 2 kinds of AVC±LAN: main AVC±LAN and sub AVC±LAN. The television display is
connected for the sub AVC±LAN.
Perform the communication check for the diagnosis system (See page DI±2097).
B Replace multi±display controller sub±assy.
A
Page 2343 of 4323
I28616
Television Display Assy:
TX+
TX±
Multi display Controller Sub±assy:
TX2+TX2±
R25
R21
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2141
2335 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector (Television display assy ± Multi±display controller
sub±assy).
PREPARATION:
Disconnect the R21 and R25 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
TX+ (R25±9) ± TX2+ (R21±5)AlwaysBelow 1 W
TX± (R25±10) ± TX2± (R21±4)AlwaysBelow 1 W
TX+(R25±9) ± Body groundAlways10 kW or higher
TX± (R25±10) ± Body groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK
Replace television display assy.
Page 2344 of 4323
DI±2142
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2336 Author: Date:
2005 SEQUOIA (RM1146U)
4 Service check mode (Multi±display controller sub±assy).
CHECK:
Perform the service check (See page DI±2099).
Start the diagnosis system and read the check result for the radio and navigation assy.
RESULT:
ºNCONº is displayed or result is not displayed (RSE ECU)Go to step A
ºGOODº is displayedGo to step B
HINT:
This system has 2 kinds of AVC±LAN: main AVC±LAN and sub AVC±LAN. The television display is
connected for the sub AVC±LAN.
Perform the communication check for the diagnosis system (See page DI±2097).
B Replace radio and navigation assy.
A