2001 TOYOTA SEQUOIA navigation system

I28606
Radio Receiver Assy
Wire Harness View:
R19
RSR+
RSR±
RSL+ SLD1
RSL±
I28750
Radio and Navigation Assy
Wire Harness View:
R27
R±L+
R±L±
R±R±R±R+
RSLD
I28337R±R+
Rear Seat Audio Controller
Wire Harness View:
R±R±
R±L+ SG1
R±L±
R24
DI±2072
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2266 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Radio receiver assy / radio and navigation assy ±
Rear seat audio controller).
PREPARATION:
Disconnect the radio receiver assy or radio and navigation con-
nector and rear seat audio controller connector.
CHECK:
Measure the resistance according to the values in the table be-
low.
OK:
Symbol (Tester connection)Specified condition
R±R+ (R24±9) ± R±R+ (R27±15) (*1), RSR+ (R19±15) (*2)Below 1 W
R±R± (R24±8) ± R±R± (R27±16) (*1), RSR± (R19±16) (*2)Below 1 W
R±L+ (R24±7) ± R±L+ (R27±17) (*1), RSL+ (R19±17) (*2)Below 1 W
R±L± (R24±6) ± R±L± (R27±18) (*1), RSL± (R19±18) (*2)Below 1 W
SG1 (R24±10) ± RSLD (R27±14), SLD1 (R19±14)Below 1 W
R±R+ (R24±9) ± Body ground10 kW or higher
R±R± (R24±8) ± Body ground10 kW or higher
R±L+ (R24±7) ± Body ground10 kW or higher
R±L± (R24±6) ± Body ground10 kW or higher
SG1 (R24±10) ± Body ground10 kW or higher
*1: w/ Navigation System
*2: w/o Navigation System
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2050).

DIDAT±01
I27728
Radio and Navigation Assy (*1)
Radio Receiver Assy (*2)
Rear Door
SpeakerSteering Pad Switch
Instrument Panel J/B

RAD NO. 2 Fuse

ECU±B Fuse

AM1 FuseEngine Room J/B

RAD NO. 1 Fuse

RAD NO. 3 Fuse
Ignition Switch
Headphone
Terminal
Front Door
Speaker and
Woofer
Stereo Component Amplifier
Multi±display
Controller
Sub±assy
*1: w/ Navigation System
*2: w/o Navigation SystemVTR TerminalDisc Player
Controller
Rear Door
Speaker
Front Door
Speaker and
Woofer
Tweeter
Television Display Assy
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2079
2273 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

DIDAU±01
I28762
Radio and Navigation Assy
(*1)
or
Radio Receiver Assy (*2)
VTR
TerminalSpeakers Stereo Component
Amplifier Assy
Multi±display Controller
Wireless
HeadphoneDisplay Signal
Sound Signal
AVC±LAN
Headphone
Terminal
Switch AssyDisc
Player
ControllerTelevision
Display
Assy
*1: w/ Navigation System
*2: w/o Navigation System DI±2080
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2274 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DIDAV±01
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2081
2275 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. Outline

As a unique feature of Rear Seat Entertainment (RSE) system, the front and rear seat occupants can
enjoy different audio±visual modes at the same time. Thus, this system offers enhanced entertainment
to the rear seat occupants.

The rear seat occupants can control the audio±visual modes with the remote controller (switch assy),
and listen to audio by using wired or wireless headphones.

The RSE system is controlled by the multi±display controller, and the communication among the audio
head unit, rear display assembly, and DVD player is established via an AVC±LAN (Audio Visual Com-
munication±Local Area Network).
2. Function of Main Component
Television Display Assy

Displays DVD and video images in accordance with video signals from the RSE ECU.

Receives signals from the remote controller and outputs them to the RSE ECU.

Outputs audio signals to the wireless headphones in the form of infrared signals.

Displays the audio±visual control screen.

Displays the adjustment screen.

Displays the diagnosis screen.

The diagnosis screen appears when the diagnosis mode is started on the audio head unit.
Audio Head Unit
w/ Navigation system:
Radio and navigation assy
w/o Navigation system:
Radio receiver assy

Outputs audio signals to the RSE ECU and the stereo component amplifier.

Outputs a request to the RSE ECU to start the diagnosis mode.
RSE ECU (Multi±display Controller)

Processes video and audio signals from the DVD player and video player and audio signals from the
audio head unit, and outputs them to the television display assembly and headphone terminals.

Controls the distribution of the audio±visual mode to the front (audio head unit) and the rear (RSE).
Remote Controller (Switch Assy)Outputs various control signals of the RSE system to the television display assembly in the form of in-
frared signals.
Wireless Headphone

Receives the audio signals from the television display assembly in the form of infrared signals.

Volume adjustment of the wireless headphone can be done by using the volume equipped on the wire-
less headphone.
Headphone Terminal
Outputs audio signals to the wired headphones that are connected.

Adjusts the volume of the wired headphones in accordance with volume control.
VTR TerminalThis terminal is for connecting the video player's video and audio output terminals.

I28687
Main AVC±LAN:
Sub AVC±LAN: Radio Receiver Assy (w/o Navigation System)
Radio and Navigation Assy (w/ Navigation System)
Disc
Player
Controller
(*2) (*1)(*2, 3)
Television
Display Assy (*2)
(*2)
(*2) Stereo
Component
AmplifierMulti±display
Controller (*2)
Rear Seat Audio
Controller (*3)
*1: Separate Type Amplifier
*2: w/ RSE System
*3: w/ RSA System
: AVC±LAN DI±2082
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2276 Author: Date:
2005 SEQUOIA (RM1146U)
3. COMMUNICATION SYSTEM
(a) This system has 2 kinds of AVC±LAN, Main AVC±LAN and Sub AVC±LAN.
(b) Multi±display controller sub±assy works as a master unit in the Sub AVC±LAN, but not in the Main
AVC±LAN.

DIDAZ±01
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2087
2281 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
TELEVISION DISPLAY ASSY
SymptomSuspect AreaSee page
Black screen.
1. Power source circuit (multi±display controller sub±assy)
2. Power source circuit (television display assy)
3. AVC±LAN circuitDI±2110
DI±2107
DI±2139
Display screen not stabilized (Synchronous error).
1. Power source circuit (television display assy)
2. Power source circuit (multi±display controller sub±assy)
3. Display signal circuit (multi±display controller sub±assy
± television display assy)
4. Television display assy
5. Multi±display controller sub±assyDI±2107
DI±2110
DI±2115
±
±
Color on display screen is unusual (RGB signal error).
1. Rear display color bar check of display check mode
2. Display signal circuit (multi±display controller sub±assy
± television display assy)
3. Television display assy
4. Multi±display controller sub±assyDI±2085
DI±2115
±
±
DISC PLAYER CONTROLLER
SymptomSuspect AreaSee page
Only DVD screen is not displayed or not stabilized.
1. Power source circuit (multi±display controller sub±assy)
2. Power source circuit (disc player controller)
3. Display signal circuit (multi±display controller sub±assy
± disc player controller)
4. Display signal circuit (multi±display controller sub±assy
± radio and navigation assy)
5. Disc player controller
6. Multi±display controller sub±assyDI±2110
DI±2112
DI±2117
DI±2119
±
±
Only DVD is not heard or the sound quality is poor.
1. Power source circuit (multi±display controller sub±assy)
2. Power source circuit (disc player controller)
3. Sound signal circuit (multi±display controller sub±assy ±
disc player controller)
4. w/o Navigation system:
Sound signal circuit (multi±display controller sub±assy ±
radio receiver assy)
w/ Navigation:
Sound signal circuit (multi±display controller sub±assy ±
radio and navigation assy)
5. Mute signal circuit
6. Multi±display controller sub±assy
7. Disc player controllerDI±2110
DI±2112
DI±2137
DI±2123
DI±2125
DI±2153
±
±
VTR TERMINAL
SymptomSuspect AreaSee page
Only display screen input from the external device is not stabi-
lized.
1. Power source circuit (multi±display controller sub±assy)
2. Power source circuit (television display assy)
3. Display signal circuit (multi±display controller sub±assy
± television display assy)
4. VTR terminal
5. Multi±display controller sub±assyDI±2110
DI±2107
DI±2115
±
±

± 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