TOYOTA SEQUOIA 2001 Service Repair Manual

I28619
Radio Receiver Assy
Wire Harness View:
MUTER20
I28605
RMU
R19
Radio Receiver Assy
Wire Harness View:
I29009
Multi±display Controller Sub±assy:
RMUT
R23
LMUT
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2149
2343 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector (Radio receiver assy ± Multi±display controller
sub±assy).
PREPARATION:
Disconnect the R19, R20 and R23 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
RMUT (R23±28) ± RMU (R19±19)AlwaysBelow 1 W
LMUT (R23±12) ± MUTE (R20±6)AlwaysBelow 1 W
RMUT (R23±28) ± Body groundAlways10 kW or higher
LMUT (R23±12) ± Body ground1Always10 kW or higher
NG Repair or replace harness or connector.
OK

DI±2150
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2344 Author: Date:
2005 SEQUOIA (RM1146U)
4 Replace multi±display controller sub±assy.
CHECK:
Replace the multi±display controller sub±assy and check if it operates normally.
OK:
Normal operation.
OK Normal operation.
NG
Replace radio receiver assy.

I28299RMUT
Radio and Navigation Assy
Wire Harness View:
R27
I28612MUTE
Radio and Navigation Assy
Wire Harness View:
R28
I29009
Multi±display Controller Sub±assy:
RMUT
R23
LMUT
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2151
2345 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check harness and connector (Radio and navigation assy ± Multi±display con-
troller sub±assy).
PREPARATION:
Disconnect the R23, R27 and R28 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
RMUT (R23±28) ± RMUT (R27±19)AlwaysBelow 1 W
LMUT (R23±12) ± MUTE (R28±6)AlwaysBelow 1 W
RMUT (R23±28) ± Body groundAlways10 kW or higher
LMUT (R23±12) ± Body groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK

DI±2152
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2346 Author: Date:
2005 SEQUOIA (RM1146U)
6 Replace multi±display controller sub±assy.
CHECK:
Replace the multi±display controller sub±assy and check if it operates normally.
OK:
Normal operation.
OK Normal operation.
NG
Replace radio and navigation assy.

I28378
Multi±display
Controller Sub±assy
LG1
MUTE R22
MUTE D23
Disc Player Controller
10
I28610
R22
MUTE Multi±display Controller Sub±assy:
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2153
2347 Author: Date:
2005 SEQUOIA (RM1146U)
Mute signal circuit (Disc player controller ± Multi±display control-
ler sub±assy)
CIRCUIT DESCRIPTION
The multi±display controller sub±assy controls the volume according to the MUTE signal from the disc player
controller.
The MUTE signal is sent to reduce noise and a popping sound generated when the mode, etc. is switched.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Inspect multi±display controller sub±assy.
PREPARATION:
Make sure that the R22 connector is connected.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Symbol
(Tester connection)ConditionSpecification
MUTE (R22±1) ±
Body ground
Turn ignition switch to
ACC, RSE system is
sounding "Changing
mode
Above 3.5 V " Below 1 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2087).
NG
DIDBL±01

I28617
Disc Player Controller:
Multi±display Controller Sub±assy:MUTE
MUTE
D23
R22
DI±2154
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2348 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check harness and connector (Disc player controller ± Multi±display controller
sub±assy).
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
MUTE (D23±10) ± MUTE (R22±1)AlwaysBelow 1 W
MUTE (D23±10) ± 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).

I28495
Multi±display
Controller Sub±assy
LG3
GAUX R21
CE V10
VTR Terminal
4
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2155
2349 Author: Date:
2005 SEQUOIA (RM1146U)
VTR terminal set signal circuit
CIRCUIT DESCRIPTION
When terminal GAUX is grounded, the multi±display controller recognizes that an external device is con-
nected.
WIRING DIAGRAM
DIDBM±01

I28321I28327
VTR Terminal:
Multi±display Controller Sub±assy:
GAUX
CE
V10
R21
DI±2156
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2350 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (VTR terminal ± Multi±display controller sub±
assy).
PREPARATION:
Disconnect the R21 and V10 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
CE (V10±4) ± GAUX (R21±3)AlwaysBelow 1 W
CE (V10±4) ± 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).

± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2157
2351 Author: Date:
2005 SEQUOIA (RM1146U)
Remote control system does not operate
INSPECTION PROCEDURE
1 Check malfunction symptoms.
CHECK:
Check for obstructions.
Check that there are no obstructions between the switch assy and the infrared ray emitting portion of
the television display assy.
OK:
No obstructions.
NG Remove obstructions.
OK
2 Check battery (Switch assy).
CHECK:
Check the battery.
Check that the dry±cell battery used for the switch assy is not dead.
OK:
It is not dead.
NG Replace dry±cell battery.
OK
DIDBN±01

I28723
DI±2158
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2352 Author: Date:
2005 SEQUOIA (RM1146U)
3 Clean the infrared ray emitting portion.
PREPARATION:
Clean the infrared ray emitting portion.
CHECK:
(a) Clean the infrared ray emitting portion on the television
display assy.
(b) Check whether the same malfunction occurs.
OK:
The function returns to normal.
OK End.
NG
4 Replace switch assy.
CHECK:
Replace the switch assy and check if it operates normally.
OK:
Normal operation.
OK End.
NG
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2087).