TOYOTA SEQUOIA 2001 Service Repair Manual

I28667
Multi±display
Controller Sub±assy
NTS1
SGN1
SG3 R2321
R2320
R2319 R
G
(Shielded) Radio and Navigation Assy
BR
BR
(Shielded) R261
R264
R265 NTSC
SGD1
SGNDIF322
IF323
IF324
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2119
2313 Author: Date:
2005 SEQUOIA (RM1146U)
Display signal circuit (Multi±display sub±assy ± Radio and navi-
gation assy)
CIRCUIT DESCRIPTION
This is the display signal circuit from the multi±display controller sub±assy to the radio and navigation assy.
WIRING DIAGRAM
DIDB9±01

I28751
NTSC
R26
Radio and Navigation Assy:
SGNDSGD1
I28614NTS1R23
Multi±display Controller Sub±assy:
SGN1SG3
DI±2120
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2314 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Multi±display controller sub±assy ± Radio and
navigation assy).
PREPARATION:
Disconnect the R26 and R23 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
NTS1 (R23±21) ± NTSC (R26±1)AlwaysBelow 1 W
SGN1 (R23±20) ± SGD1 (R26±4)AlwaysBelow 1 W
SG3 (R23±19) ± SGND (R26±5)AlwaysBelow 1 W
NTS1 (R23±21) ± Body groundAlways10 kW or higher
SGN1 (R23±20) ± Body groundAlways10 kW or higher
SG3 (R23±19) ± 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).

I28666
Multi±display
Controller Sub±assy
NTS4
SGN5
SG6 R2124
R2123
R2122 BR
BR NTS4
DGND
SGN55
6
7
(Shielded) V10
VTR Terminal
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2121
2315 Author: Date:
2005 SEQUOIA (RM1146U)
Display signal circuit (Multi±display controller sub±assy ± VTR
terminal)
CIRCUIT DESCRIPTION
This is the display signal circuit from the multi±display controller sub±assy to the VTR terminal.
WIRING DIAGRAM
DIDBA±01

I28321I28327
VTR Terminal:
Multi±display Controller Sub±assy:
NTS4
SGN5
SG6
SGN5DGND
NTS4 V10
R21
DI±2122
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2316 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Multi±display controller sub±assy ± VTR termi-
nal).
PREPARATION:
Disconnect the V10 and R21 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
NTS4 (V10±5) ± NTS4 (R21±24)AlwaysBelow 1 W
DGND (V10±6) ± SGN5 (R21±23)AlwaysBelow 1 W
SGN5 (V10±7) ± SG6 (R21±22)AlwaysBelow 1 W
NTS4 (V10±5) ± Body groundAlways10 kW or higher
DGND (V10±6) ± Body groundAlways10 kW or higher
SGN5 (V10±7) ± 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).

I28597
IF3
L+ R±
R+
L± 6
W
(Shielded)Multi±display
Controller Sub±assy
R2310
R239
R238
R237
R2311 W
W
W IF37
IF38
IF39
IF35
(Shielded) W
G
B
R L+ R±
R+
L±R202
R203
R204
R205
R201
S±GND
SG1 Radio Receiver Assy
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2123
2317 Author: Date:
2005 SEQUOIA (RM1146U)
Sound signal circuit (From multi±display controller sub±assy to
radio receiver assy)
CIRCUIT DESCRIPTION
This is the sound signal circuit from the multi±display controller sub±assy to the radio receiver assy.
WIRING DIAGRAM
DIDBB±01

I28740
Radio Receiver Assy
Wire Harness View:
L+
S±GND
L±
R+R±R20
I28614
R23
L+ SG1
R±L±
R+
Multi±display Controller Sub±assy:
DI±2124
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2318 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Radio receiver assy ± Multi±display controller
sub±assy).
PREPARATION:
Disconnect the R20 and R23 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
L+ (R20±4) ± L+ (R23±8)AlwaysBelow 1 W
L± (R20±5) ± L± (R23±7)AlwaysBelow 1 W
R+ (R20±2) ± R+ (R23±10)AlwaysBelow 1 W
R± (R20±3) ± R± (R23±9)AlwaysBelow 1 W
S±GND (R20±1) ± SG1 (R23±11)AlwaysBelow 1 W
L+ (R20±4) ± Body groundAlways10 kW or higher
L± (R20±5) ± Body groundAlways10 kW or higher
R+ (R20±2) ± Body groundAlways10 kW or higher
R± (R20±3) ± Body groundAlways10 kW or higher
S±GND (R20±1) ± 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).

I28597
IF3
L+ R±
R+
L± 6
W
(Shielded)Multi±display
Controller Sub±assy
R2310
R239
R238
R237
R2311 W
W
W IF37
IF38
IF39
IF35
(Shielded) W
G
B
R CDL+ CDR± CDR+
CDL±R282
R283
R284
R285
R281
CSLDSG1 Radio and Navigation Assy
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2125
2319 Author: Date:
2005 SEQUOIA (RM1146U)
Sound signal circuit (From multi±display controller sub±assy to
radio and navigation assy)
CIRCUIT DESCRIPTION
This is the sound signal circuit from the multi±display controller sub±assy to the radio and navigation assy.
WIRING DIAGRAM
DIDBC±01

I28612
Radio and Navigation Assy
Wire Harness View:
R28
CDL+CDR±
CSLDCDL±
CDR+
I28614
R23
L+ SG1
R±L±
R+
Multi±display Controller Sub±assy:
DI±2126
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2320 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Radio and navigation assy ± Multi±display con-
troller sub±assy).
PREPARATION:
Disconnect the R23 and R28 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
CDL+ (R28±4) ± L+ (R23±8)AlwaysBelow 1 W
CDL± (R28±5) ± L± (R23±7)AlwaysBelow 1 W
CDR+ (R28±2) ± R+ (R23±10)AlwaysBelow 1 W
CDR± (R28±3) ± R± (R23±9)AlwaysBelow 1 W
CSLD (R28±1) ± SG1 (R23±11)AlwaysBelow 1 W
CDL+ (R28±4) ± Body groundAlways10 kW or higher
CDL± (R28±5) ± Body groundAlways10 kW or higher
CDR+ (R28±2) ± Body groundAlways10 kW or higher
CDR± (R28±3) ± Body groundAlways10 kW or higher
CSLD (R28±1) ± 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).

I28597
IF3
R±L+ R±R±
R±R+
R±L± W
(Shielded)Multi±display
Controller Sub±assy
R2326
R2325
R2324
R2323
R2327 W
W
W IF3
IF3
IF3
IF3
(Shielded) RSL+ RSR±
RSR+
RSL±R1915
R1916
R1917
R1918
R1914
SLD1
SG2 Radio Receiver Assy
W
G
B
R18
19
20
21
17
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2127
2321 Author: Date:
2005 SEQUOIA (RM1146U)
Sound signal circuit (From radio receiver assy to multi±display
sub±assy)
CIRCUIT DESCRIPTION
This is the sound signal circuit from the radio receiver assy to the multi±display controller sub±assy.
WIRING DIAGRAM
DIDBD±01

I28618
Multi±display Controller Sub±assy:
R±L±
R±L+
R±R± R±R+
Radio Receiver Assy:
SG2
RSR+RSL+
RSR±
RSL±
SLD1
R19
R23
DI±2128
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2322 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Radio receiver assy ± Multi±display controller
sub±assy).
PREPARATION:
Disconnect the R23 and R19 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
RSR+ (R19±15) ±
R±R+ (R23±26)AlwaysBelow 1 W
RSR± (R19±16) ±
R±R± (R23±25)AlwaysBelow 1 W
RSL+ (R19±17) ±
R±L+ (R23±24)AlwaysBelow 1 W
RSL± (R19±18) ±
R±L± (R23±23)AlwaysBelow 1 W
SLD1 (R19±14) ± SG2 (R23±27)AlwaysBelow 1 W
RSR+ (R19±15) ± Body groundAlways10 kW or higher
RSR± (R19±16) ± Body groundAlways10 kW or higher
RSL+ (R19±17) ± Body groundAlways10 kW or higher
RSL± (R19±18) ± Body groundAlways10 kW or higher
SLD1 (R19±14) ± 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).