2001 TOYOTA SEQUOIA phone

± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2089
2283 Author: Date:
2005 SEQUOIA (RM1146U) Quality of sound from wireless headphone is poor or no sound
can be heard (radio sound only).
1. w/o Navigation System:
Sound signal circuit (multi±display controller sub±assy ±
radio receiver assy)
w/ Navigation System:
Sound signal circuit (multi±display controller sub±assy ±
radio and navigation assy)
2. Multi±display controller sub±assy
3. w/o Navigation System:
Radio receiver assy
4. w/ Navigation System:
Radio and navigation assy
DI±2123
DI±2125
±
±
±
Quality of sound from headphone connected is poor or no sound
can be heard (radio sound only).
1. w/o Navigation System:
Sound signal circuit (multi±display controller sub±assy ±
radio receiver assy)
w/ Navigation System:
Sound signal circuit (multi±display controller sub±assy ±
radio and navigation assy)
2. Multi±display controller sub±assy
3. w/o Navigation System:
Radio receiver assy
4. w/ Navigation System:
Radio and navigation assy
DI±2123
DI±2125
±
±
±
REMOTE CONTROL
SymptomSuspect AreaSee page
A remote control system does not operate.
1. A remote control system does not operate
2. Remote commander check of display check mode
3. Power source circuit (multi±display controller sub±assy)
4. Power source circuit (television display assy)
5. AVC±LAN circuitDI±2157
DI±2085
DI±2110
DI±2107
DI±2139

I28286
R25
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2093
2287 Author: Date:
2005 SEQUOIA (RM1146U)AUXR ± GND
(R21±12 ± R23±29)
BR ± YSound signalExternal device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
R2 ± GND
(R21±13 ± R23±29)B ± YDisplay signal (Red)Display is on
(Television display assy)Pulse genera-
tion
G2 ± GND
(R21±14 ± R23±29)B ± YDisplay signal (Green)Display is on
(Television display assy)Pulse genera-
tion
B2 ± GND
(R21±15 ± R23±29)B ± YDisplay signal (Blue)Display is on
(Television display assy)Pulse genera-
tion
SYN2 ± GND
(R21±16 ± R23±29)B ± YDisplay signal
(Synchronize)Display is on
(Television display assy)Pulse genera-
tion
VR2 ± Body ground
(R21±17 ± Body ground)B ± Body groundGroundAlwaysBelow 1 V
VG2 ± Body ground
(R21±18 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
SG6 ± Body ground
(R21±19 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
HP2L ± GND
(R21±20 ± R23±29)BR ± YSound signal (Output)Audio system is playing (Head-
phone)
A waveform
synchronized
with sound is
output
HP2R ± GND
(R21±21 ± R23±29)BR ± YSound signal (Output)Audio system is playing (Head-
phone)
A waveform
synchronized
with sound is
output
SG6 ± Body ground
(R21±22 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
SGN5 ± Body ground
(R21±23 ± Body ground)BR ± Body groundGroundAlwaysBelow 1 V
NTS4 ± GND
(R21±24 ± R23±29)BR ± YDisplay signalExternal device system displayed
(At that time of VTR jack use)Pulse genera-
tion
*1: w/ Navigation System
2. TELEVISION DISPLAY ASSY
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecification
GND ± Body ground
(R25±1 ± Body ground)Y ± Body groundGroundAlwaysBelow 1 V
SGND ± Body ground
(R25±2 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V

I28287
D23
DI±2094
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2288 Author: Date:
2005 SEQUOIA (RM1146U)R+ ± GND
(R25±3 ± R25±1)
W ± YSound signal (Input)RSE system is sounding (Head-
phone)
A waveform
synchronized
with sound is
output
R± ± GND
(R25±4 ± R25±1)W ± YSound signal (Input)RSE system is sounding (Head-
phone)
A waveform
synchronized
with sound is
output
L+ ± GND
(R25±5 ± R25±1)W ± YSound signal (Input)RSE system is sounding (Head-
phone)
A waveform
synchronized
with sound is
output
L± ± GND
(R25±6 ± R25±1)W ± YSound signal (Input)RSE system is sounding (Head-
phone)
A waveform
synchronized
with sound is
output
ACC ± GND
(R25±7 ± R25±1)LG ± YIgnition (ACC)Ignition switch ACC10 to 14 V
BU+B ± GND
(R25±8 ± R25±1)Y ± YBatteryAlways10 to 14 V
TX+ ± GND
(R25±9 ± R25±1)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
TX± ± GND
(R25±10 ± R25±1)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
VG ± Body ground
(R25±11 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
VR ± Body ground
(R25±12 ± Body ground)B ± Body groundGroundAlwaysBelow 1 V
SYNC ± VR
(R25±13 ± R25±12)B ± BDisplay signal
(Synchronize)Rear display is displayedPulse genera-
tion
B ± VR
(R25±14 ± R25±12)B ± BDisplay signal (Blue)Rear display is displayedPulse genera-
tion
G ± VR
(R25±15 ± R25±12)B ± BDisplay signal (Green)Rear display is displayedPulse genera-
tion
R ± VR
(R25±16 ± R25±12)B ± BDisplay signal (Red)Rear display is displayedPulse genera-
tion
3. DISC PLAYER CONTROLLER
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecification
SLD ± Body ground
(D23±1 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
S.GND ± Body ground
(D23±2 ± Body ground)BR ± Body groundGroundAlwaysBelow 1 V

I28323
H10
H11
Headphone Terminal LH
Headphone Terminal RH
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2095
2289 Author: Date:
2005 SEQUOIA (RM1146U)NTSC ± GND
(D23±3 ± D23±16)
BR ± LGDisplay signal (Output)Rear display is displayed (DVD)Pulse genera-
tion
SLD ± Body ground
(D23±5 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 W
R+ ± GND
(D23±6 ± D23±16)W ± LGSound signal (Output)DVD system is sounding
A waveform
synchronized
with sound is
output
R± ± GND
(D23±7 ± D23±16)W ± LGSound signal (Output)DVD system is sounding
A waveform
synchronized
with sound is
output
L+ ± GND
(D23±8 ± D23±16)W ± LGSound signal (Output)DVD system is sounding
A waveform
synchronized
with sound is
output
L± ± GND
(D23±9 ± D23±16)W ± LGSound signal (Output)DVD system is sounding
A waveform
synchronized
with sound is
output
MUTE ± GND
(D23±10 ± D23±16)LG ± LGMute signalDVD system is soundingBelow 1 V
GND ± Body ground
(D23±16 ± Body ground)LG ± Body groundGroundAlwaysBelow 1 V
TX+ ± GND
(D23±17 ± D23±16)LG ± LGAVC±LAN
communication signalIgnition switch ACC2 to 3 V
TX± ± GND
(D23±18 ± D23±16)LG ± LGAVC±LAN
communication signalIgnition switch ACC2 to 3 V
ACC ± GND
(D23±19 ± D23±16)LG ± LGIgnition (ACC)Ignition switch ACC10 to 14 V
+B ± GND
(D23±20 ± D23±16)LG ± LGBatteryAlways10 to 14 V
4. HEADPHONE TERMINAL
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecification
HPR ± SGND
(H10±1 ± H10±3)BR ± ShieldedSound signal (Input)External device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
HPL ± SGND
(H10±2 ± H10±3)BR ± ShieldedSound signal (Input)External device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
SGND ± Body ground
(H10±3 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V

I28668
HP1R
HP1L
SG5 R219
R218
R217 BR
BR HPR
HPL
SGND1
2
3
(Shielded) H10
Headphone Terminal LHMulti±display
Controller Sub±assy
HP2R
HP2L
SG6 R2121
R2120
R2119 BR
BR HPR
HPL
SGND1
2
3
(Shielded) H11
Headphone Terminal RH
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2133
2327 Author: Date:
2005 SEQUOIA (RM1146U)
Sound signal circuit (Multi±display controller sub±assy ± Head-
phone terminal)
CIRCUIT DESCRIPTION
This is the sound signal circuit from the headphone terminal to the multi±display controller sub±assy.
WIRING DIAGRAM
DIDBG±01

I28333
Headphone Terminal:
Multi±display Controller Sub±assy:
SG5HP1L
HP1R
SG6
HP2L HP2R R21
H10
H11
HPR
HPL
SGND
DI±2134
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2328 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Headphone terminal ± Multi±display controller
sub±assy).
PREPARATION:
Disconnect the H10 (H11) and R21 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)ConditionSpecified condition
HPR (H10±1) ± HP1R (R21±9)AlwaysBelow 1 W
HPL (H10±2) ± HP1L (R21±8)AlwaysBelow 1 W
HPR (H11±1) ± HP2R (R21±21)AlwaysBelow 1 W
HPL (H11±2) ± HP2L (R21±20)AlwaysBelow 1 W
SGND (H10±3) ± SG5 (R21±7)AlwaysBelow 1 W
SGND (H11±3) ± SG6 (R21±19)AlwaysBelow 1 W
HPR (H10±1, H11±1) ± Body groundAlways10 kW or higher
HPL (H10±2, H11±2) ± Body groundAlways10 kW or higher
SGND (H10±3, H11±3) ± Body groundAlways10 kW or higher
SGND (H10±3) ± Body groundAlways10 kW or higher
SGND (H11±3) ± 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).

DIDBP±01
I27727
Instrument Panel J/B

RAD NO. 2 Fuse

ECU±B Fuse

AM1 FuseEngine Room J/B

RAD NO. 1 Fuse

RAD NO. 3 Fuse
Steering Pad
Switch
Ignition SwitchDisc Player
Controller
(*1)
Stereo
Component
Amplifier
Multi±display
Controller (*1)
VTR
Terminal
(*1)Headphone
Terminal
(*1) (*2)
Radio and
Navigation Assy GPS Antenna
TweeterTelevision Display Assy (*1)
Rear Seat Audio
Controller Assy (*2)
Rear Door SpeakerRear Door Speaker
Front Door Speaker
and Woofer
Front Door Speaker
and Woofer
*1: w/ RSE System
*2: w/ RSA System
DI±2160
± DIAGNOSTICSNAVIGATION SYSTEM
2354 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

± DIAGNOSTICSNAVIGATION SYSTEM
DI±2225
2419 Author: Date:
2005 SEQUOIA (RM1146U)
Radio broadcast cannot be received (Poor reception)
INSPECTION PROCEDURE
1 Check if radio auto±search functions properly.
CHECK:
Check if the radio auto±search functions properly.
Perform the auto±search of the radio and check that it functions normally.
OK:
The radio auto±search functions properly.
OK Replace radio and navigation assy.
NG
2 Check optional components.
CHECK:
Check optional component (sun shade film, telephone antenna, etc.).
Check whether or not any optional component such as the sun shade film and the telephone antenna
is installed.
OK:
Optional component is not installed.
NG Effect from optional component.
OK
DIDCK±01