TOYOTA SEQUOIA 2001 Service Repair Manual

± 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

DIDB0±01
I28662
R23
R22R21
DI±2090
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2284 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
1. MULTI±DISPLAY CONTROLLER SUB±ASSY
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecification
L± ± GND
(R23±7 ± R23±29)W ± YSound signal (Output)DVD system is playing
A waveform
synchronized
with sound is
output
L+ ± GND
(R23±8 ± R23±29)W ± YSound signal (Output)DVD system is playing
A waveform
synchronized
with sound is
output
R± ± GND
(R23±9 ± R23±29)W ± YSound signal (Output)DVD system is playing
A waveform
synchronized
with sound is
output
R+ ± GND
(R23±10 ± R23±29)W ± YSound signal (Output)DVD system is playing
A waveform
synchronized
with sound is
output
SG1 ± Body ground
(R23±11 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
LMUT ± GND
(R23±12 ± R23±29)LG ± YMute signalDisc player controller is sounding
" changing modeAbove 3.5 V "
Below 1 V
+B1 ± GND
(R23±16 ± R23±29)Y ± YBatteryAlways10 to 14 V
(*1) SG3 ± Body ground
(R23±19 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
(*1) SGN1 ± Body ground
(R23±20 ± Body ground)BR ± Body groundGroundAlwaysBelow 1 V
(*1) NTS1 ± GND
(R23±21 ± R23±29)BR ± YDisplay signalDVD system is displayedPulse genera-
tion

± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2091
2285 Author: Date:
2005 SEQUOIA (RM1146U)R±L± ± GND
(R23±23 ± R23±29)
W ± YSound signal (Input)RSE system is playing
A waveform
synchronized
with sound is
output
R±L+ ± GND
(R23±24 ± R23±29)W ± YSound signal (Input)RSE system is playing
A waveform
synchronized
with sound is
output
R±R± ± GND
(R23±25 ± R23±29)W ± YSound signal (Input)RSE system is playing
A waveform
synchronized
with sound is
output
R±R+ ± GND
(R23±26 ± R23±29)W ± YSound signal (Input)RSE system is playing
A waveform
synchronized
with sound is
output
SG2 ± Body ground
(R23±27 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
RMUT ± GND
(R23±28 ± R23±29)LG ± YMute signalAudio source is changingBelow 1 V
GND ± Body ground
(R23±29 ± Body ground)Y ± Body groundGroundAlwaysBelow 1 V
TX± ± GND
(R23±30 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
TX+ ± GND
(R23±31 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
ACC ± GND
(R23±32 ± R23±29)LG ± YIgnition (ACC)Ignition switch in the ACC position10 to 14 V
MUTE ± GND
(R22±1 ± R23±29)LG ± YMute signalDisc player controller is changingBelow 1 V
AL± ± GND
(R22±2 ± R23±29)W ± YSound signal (Input)DVD system is playing
A waveform
synchronized
with sound is
output
AL+ ± GND
(R22±3 ± R23±29)W ± YSound signal (Input)DVD system is playing
A waveform
synchronized
with sound is
output
AR± ± GND
(R22±4 ± R23±29)W ± YSound signal (Input)DVD system is playing
A waveform
synchronized
with sound is
output
AR+ ± GND
(R22±5 ± R23±29)W ± YSound signal (Input)DVD system is playing
A waveform
synchronized
with sound is
output
SG4 ± Body ground
(R22±6 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
NTS2 ± GND
(R22±8 ± R23±29)BR ± YDisplay signalDVD system is displayedPulse genera-
tion
SGN2 ± Body ground
(R22±9 ± Body ground)BR ± Body groundGroundAlwaysBelow 1 V
SG9 ± Body ground
(R22±10 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
+B ± GND
(R22±11 ± R23±29)LG ± YBatteryAlways10 to 14 V

DI±2092
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2286 Author: Date:
2005 SEQUOIA (RM1146U)ACC3 ± GND
(R22±12 ± R23±29)
LG ± YIgnition (ACC)Ignition switch in the ACC position10 to 14 V
TX3± ± GND
(R22±13 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
TX3+ ± GND
(R22±14 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
GND4 ± Body ground
(R22±15 ± Body ground)LG ± Body groundGroundAlwaysBelow 1 V
HPL± ± GND
(R22±16 ± R23±29)W ± YSound signal (Output)RSE system is playing
A waveform
synchronized
with sound is
output
HPL+ ± GND
(R22±17 ± R23±29)W ± YSound signal (Output)RSE system is playing
A waveform
synchronized
with sound is
output
HPR± ± GND
(R22±18 ± R23±29)W ± YSound signal (Output)RSE system is playing
A waveform
synchronized
with sound is
output
HPR+ ± GND
(R22±19 ± R23±29)W ± YSound signal (Output)RSE system is playing
A waveform
synchronized
with sound is
output
SLD1 ± Body ground
(R22±20 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
+B2 ± GND
(R21±1 ± R23±29)Y ± YBatteryAlways10 to 14 V
ACC2 ± GND
(R21±2 ± R23±29)LG ± YIgnition (ACC)Ignition switch in the ACC position10 to 14 V
GAUX ± GND
(R21±3 ± R23±29)LG ± YGroundExternal device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
TX2± ± GND
(R21±4 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
TX2+ ± GND
(R21±5 ± R23±29)LG ± YAVC±LAN
communication signalIgnition switch ACC2 to 3 V
GND1 ± Body ground
(R21±6 ± Body ground)Y ± Body groundGroundAlwaysBelow 1 V
SG5 ± Body ground
(R21±7 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
HP1L ± GND
(R21±8 ± R23±29)BR ± YSound signal (Input)External device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
HP1R ± GND
(R21±9 ± R23±29)BR ± YSound signal (Input)External device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
SG7 ± Body ground
(R21±10 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
AUXL ± GND
(R21±11 ± R23±29)BR ± YSound signalExternal device system is playing
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output

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

I28322I28621
V10
DI±2096
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2290 Author: Date:
2005 SEQUOIA (RM1146U)HPR ± SGND
(H11±1 ± H11±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
(H11±2 ± H11±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
(H11±3 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
5. VTR TERMINAL
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecification
AUXR ± GND
(V10±1 ± R23±29)BR ± YExternal audio R input
signalExternal device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
AUXL ± GND
(V10±2 ± R23±29)BR ± YExternal audio L input
signalExternal device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
SG6 ± Body ground
(V10±3 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V
CE ± GND
(V10±4 ± R23±29)LG ± YExternal VIDEO input
signalExternal device system sounding
(At that time of VTR jack use)
A waveform
synchronized
with sound is
output
NTS4 ± GND
(V10±5 ± R23±29)BR ± YDisplay signalVTR is displayedPulse genera-
tion
DGND ± Body ground
(V10±6 ± Body ground)BR ± Body groundGroundAlwaysBelow 1 V
SGN5 ± Body ground
(V10±7 ± Body ground)Shielded ± Body groundGroundAlwaysBelow 1 V

DIDB1±01
I28273
RSE system normal operation
Diagnosis start±up (w/ Navigation system: See page DI±2191)
Select ºMENUº and enter
ºDiagnosis MENUº using a
remote controller.
ºService Check Modeº
screen to section
(See page DI±2099) ºDisplay Checkº
screen to section
(See page DI±2085)Start±up of the diagnostics function for the ºaudio system
and TOYOTA navigation systemº is linked with the start±
up of the diagnostics function of the ºrear displayº.
(w/o Navigation system: See page DI±1974)
Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2097
2291 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
DIAGNOSIS CHECK
HINT:
Diagnosis system mode is operated as follows.

I28274
Switch Assy: DI±2098
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2292 Author: Date:
2005 SEQUOIA (RM1146U)
HINT:
RSE system inspects the devices consisting of Sub AVC±LAN
by multi±display controller.
Starting Main AVC±LAN (See page DI±1974, DI±2097).
HINT:

Starting Main AVC±LAN operates the diagnosis mode
and Sub AVC±LAN is also automatically enter the diagno-
sis mode and performing the diagnosis mode operation
on the multi±display controller.

Use a switch assy to operate diagnosis mode.