TOYOTA SEQUOIA 2001 Service Repair Manual

DIDAJ±01
RSA SYSTEM Check Sheet
Inspector 's name:
Customer 's NameVIN
Production Date
Licence Plate No.
Odometer Reading / /km
mile
Frequency of Problem Occurrence / /

Constant
Intermittent ( Times a day) Brought±in Date
Date of First Occurrence
Problem
Symptom

Headphone
DTC
Check
Parts name
DTC (1st time)DTC (2nd time)
Switch Assy

Headphone Terminal
Rear Seat Audio Controller Assy


± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2049
2243 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK

DIDAK±01
DI±2050
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2244 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
RSA SYSTEM
SymptomSuspected AreasSee page
RSA system cannot be powered.1. Power source circuit (rear seat controller assy)DI±2058
Quality of sound from wireless headphone is poor or no sound
can be heard.
1. Power source circuit (rear seat controller assy)
2. Mute signal circuit (to rear seat audio controller)
3. Sound signal circuit (to rear seat audio controller)
4. Rear seat audio controllerDI±2058
DI±2066
DI±2070
±
Quality of sound from headphone connected to headphone termi-
nal is poor or no sound can be heard.
1. Power source circuit (rear seat controller assy)
2. Mute signal circuit (to rear seat audio controller)
3. Sound signal circuit (Rear seat audio controller ± head-
phone terminal)
4. Sound signal circuit (Radio receiver assy / radio and
navigation assy ± rear seat audio controller)DI±2058
DI±2066
DI±2073
DI±2070
REMOTE CONTROL
SymptomSuspected AreasSee page
A remote control system does not operate.
1. Power source circuit (rear seat controller assy)
2. A remote control system does not operate
3. AVC±LAN circuitDI±2058
DI±2076
DI±2061

DIDAL±01
I28334
R24
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2051
2245 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
1. REAR SEAT AUDIO CONTROLLER
Terminals No. (Symbols)Wiring ColorTerminal
DescriptionConditionSpecified value
R24±1 ± Body ground
(SGN1 ± Body ground)Shielded ±
Body groundGroundAlwaysBelow 1 V
R24±2 ± R24±17
(HP1L ± GND)BR ± LGSound signal
(Output)RSA system is sounding (Headphone)
A waveform syn-
chronized with
sounds is output
R24±3 ± R24±17
(HP1R ± GND)BR ± LGSound signal
(Output)RSA system is sounding (Headphone)
A waveform syn-
chronized with
sounds is output
R24±6 ± R24±17
(R±L± ± GND)W ± LGSound signal
(Input)RSA system is sounding
A waveform syn-
chronized with
sounds is output
R24±7 ± R24±17
(R±L+ ± GND)W ± LGSound signal
(Input)RSA system is sounding
A waveform syn-
chronized with
sounds is output
R24±8 ± R24±17
(R±R± ± GND)W ± LGSound signal
(Input)RSA system is sounding
A waveform syn-
chronized with
sounds is output
R24±9 ± R24±17
(R±R+ ± GND)W ± LGSound signal
(Input)RSA system is sounding
A waveform syn-
chronized with
sounds is output
R24±10 ± Body ground
(SG1 ± Body ground)Shielded ±
Body groundGroundAlwaysBelow 1 V
R24±11 ± R24±17
(RMUT ± GND)LG ± LGMute signalAudio system is playing " Changing modeAbove 3.5 V "
Below 1 V
R24±12 ± R24±17
(+B ± GND)LG ± LGBatteryAlways10 to 14 V
R24±13 ± Body ground
(SGN2 ± Body ground)Shielded ±
Body groundGroundAlwaysBelow 1 V
R24±14 ± R24±17
(HP2L ± GND)BR ± LGSound signal
(Output)RSA system is sounding (Headphone)
A waveform syn-
chronized with
sounds is output
R24±15 ± R24±17
(HP2R ± GND)BR ± LGSound signal
(Output)RSA system is sounding (Headphone)
A waveform syn-
chronized with
sounds is output
R24±17 ± Body ground
(GND ± Body ground)LG ±
Body groundGroundAlwaysBelow 1 W

I28323
H10
H11
Headphone Terminal LH
Headphone Terminal RH DI±2052
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2246 Author: Date:
2005 SEQUOIA (RM1146U)R24±22 ±R24±17 (TX+ ±
GND)
LG ± LG
AVC±LAN
communication
signal
Ignition switch ON2 to 3 V
R24±23 ±R24±17 (TX± ±
GND)LG ± LG
AVC±LAN
communication
signal
Ignition switch ON2 to 3 V
R24±24 ± R24±17
(ACC ± GND)LG ± LGIgnition (ACC)Ignition switch ON10 to 14 V
2. HEADPHONE TERMINAL
Terminal No. (Symbols)Wiring ColorTerminal
DescriptionConditionSpecified value
H10±1 ± H10±3
(HPR ± SGND)BR ± ShieldedSound signal
(Input)External device system sounding
(At that time of headphone terminal use)A waveform syn-
chronized with
sound is output
H10±2 ± H10±3
(HPL ± SGND)BR ± ShieldedSound signal
(Input)External device system sounding
(At that time of headphone terminal use)A waveform syn-
chronized with
sound is output
H10±3 ± Body ground
(SGND ± Body ground)Shielded ± Body
groundGroundAlwaysBelow 1 V
H11±1 ± H11±3
(HPR ± SGND)BR ± ShieldedSound signal
(Input)External device system sounding
(At that time of headphone terminal use)A waveform syn-
chronized with
sound is output
H11±2 ± H11±3
(HPL ± SGND)BR ± ShieldedSound signal
(Input)External device system sounding
(At that time of headphone terminal use)A waveform syn-
chronized with
sound is output
H11±3 ± Body ground
(SGND ± Body ground)Shielded ± Body
groundGroundAlwaysBelow 1 V

DIDAH±01
I28317
Switch Assy:
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2053
2247 Author: Date:
2005 SEQUOIA (RM1146U)
DTC CHECK / CLEAR
1. DIAGNOSIS CHECK
HINT:
RSA system inspects the devices consisting of Sub AVC±LAN
on the rear seat audio controller assy.
(a) Starting Main AVC±LAN (See page DI±1974, DI±2191).
HINT:
As starting Main AVC±LAN to operate the diagnosis
mode, Sub AVC±LAN also automatically enters the diag-
nosis mode. Perform the diagnosis mode operation on
the rear seat audio controller assy.
Use a switch assy to operate diagnosis mode.
(b) Service Check Screen
Reference
In the service check mode, the system check and
the diagnosis memory check are performed, and
the check results are displayed in ascending order
of the device codes (physical address).
TermsMeaning
Component code
(Physical address)Three±digit code (In hexadecimal) given to each device
comprising AVC±LAN. Corresponding to its function, individ-
ual symbol is provided.
Logical addressTwo±digit code (In hexadecimal) given to each function and
device unit in each device comprising AVC±LAN.
(c) Finishing Diagnosis Mode (See page DI±1974,
DI±2191).
(d) Element Check Mode
After the diagnosis start±up, the system enters the ele-
ment check mode. Check that the all elements come on.

DI±2054
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2248 Author: Date:
2005 SEQUOIA (RM1146U)
(e) Service Check Mode Result Display (for checking the cur-
rent and the past system conditions)
(1) Press the ºTUNE/TRACK UPº switch to see the
check result of each device.
(2) Check result display.
DisplayOriginal LanguageMeaningAction to be taken
goodGood (normal)No DTC is detected in both ºSystem Check Modeº and
ºDiagnosis Memory Modeº.±
NCONNo connection
The system recognized the component when it was regis-
tered, but the component gives no response to the ºDiagno-
sis Mode ON Requestº.
Check the power source cir-
cuit and the communication
circuit of the device indi-
cated by the device code
(physical address).
ECHNExchangeOne or more DTC for ºExchangeº is detected in either ºSys-
tem Check Modeº or ºDiagnosis Memory Modeº.
Go to the detailed informa-
tion mode to check the
trouble area by referring to
the DTC list.
CHECCheck
When no DTC is detected for ºExchangeº, one or more DTC
for ºCheckº is detected in either ºSystem Check Modeº or
ºDiagnosis Memory Modeº.Go to the detailed informa-
tion mode to check the
trouble area referring to the
DTC list.
I28309
The illustration shows the case that the system has 2 devices with codes 190 and 360, and the device (code
360) has a trouble.
The check result is displayed in ascending order of device code. The device code is displayed first, and then
the check result.P±±±indicates physical address
190±±±physical address
good±±±ºThe component is normalº.
P±±±indicates physical address
360±±±physical address
CHEC±±±ºCheck neededº.
: TUNE/TRACK UP
: TUNE/TRACK DOWN

± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2055
2249 Author: Date:
2005 SEQUOIA (RM1146U) OLD
Old versionOld DTC application is identified and DTC is detected in ei-
ther ºSystem Check Modeº or ºDiagnosis Memory Modeº.±
NRESNo response
The device gives no response to any one of ºSystem Check
Mode ON Requestº, ºSystem Check Result Requestº and
ºDiagnosis Memory Requestº.
Check the power source cir-
cuit and the communication
circuit of the device indi-
cated by the device code
(physical code).
(3) To perform the Service Check again, press the pre-
set switch º1º.
(f) detailed information Mode (when displaying the troubled
device's DTC)
(1) With ºCHECº or ºECHNº displayed, press the preset
switch º2º to go to the detailed information mode.
(2) Press the ºTUNE/TRACKº switch to display ºSys-
tem Check Result (SYS)º and ºDiagnosis Memory
Response (CODE)º.

I28310
Service Check Mode
Detailed Information ModeDISC/CH/PROG DOWN
Detailed information
of the first code
is displayed
Detailed information
of the second code
is displayed
Continue to display detailed information
when more than one DTC is detected.
The illustration shows the case that the component with code 190 has DTC º47º and ºdCº as a result of the
system check and the diagnosis memory response.
The detailed information mode shows the system check result first, then the diagnosis memory response result.
(*1): As for DTC that does not have any sub code, sub code is not displayed.P±±±indicates physical address
190±±±physical address
SYS±±±system check result
P±±±indicates physical address
360±±±sub code
6F±±±connection
check number 1±±±the first code
62±±±logical address
DC±±±DTC CODE±±±diagnosis memory
response result
2±±±the second code
01±±±logical address
05±±±the number of times of
occurrence
(in decimal) 47±±±DTC
Continue to display detailed information
when more than one DTC is detected.
To(*1)
: TUNE/TRACK UP
: TUNE/TRACK DOWN
DISC/CH/PROG UP
 From DI±2056
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2250 Author: Date:
2005 SEQUOIA (RM1146U)

± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2057
2251 Author: Date:
2005 SEQUOIA (RM1146U)
(3) Displayed Items in Detailed Information Mode
Division Code for
DTC displayMeaning
Order of detaileded information displayed when the ºTUNE
UPº switch is pressed. (The order is reversed when the
ºTUNE DOWNº switch is pressed.)
SYSSystem check result is displayed.Logical address "
DTC
CODEDiagnosis memory check result is displayed.
Logical address"
DTC"
Sub code"
Connection confirmation number"
The number of times of occurrence
(4) Check the trouble area referring to the DTC list.
(5) To return to the service check mode, press the pre-
set switch º3º.
(g) Clearing Individual DTC Memory (See page DI±1974,
DI±2199).
(h) Clearance of All DTC Memory (See page DI±1974,
DI±2199).

DIDAM±01
I28496
B±O
24R24
Rear Seat Audio
Controller Assy
ACC
+B
17
GND 1228 C
4 3A36
ACC Cut
Relay
B 12 1Sub J/B No.3
3A
ID2 W±R
J/C
L±Y1
2
IA1 26 L±R
L±R
2B3
2C8
2D Engine Room J/B
ECU±BShort Pin
1 Instrument Panel J/B
W±R
AM11
3 2RAD No.2
W 1
P6
ALT
1B
BatteryLG To ECM
GR
RSE
2 2
1Engine Room R/B No.2J37
ID221
IMLG 3A
LG
12
ID2 J38
L±R
2 12
W±LRAD No.1
W±R
W±L 1
2B
3
AM1B
ACC
I18
Ignition SW 1C
1C 1E1F
1J
1LGR
PW±R
GR
W±B 58
4F10
Fusible Link Block DI±2058
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2252 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Power source circuit (Rear seat audio controller)
CIRCUIT DESCRIPTION
This circuit provides the power to the rear seat audio controller.
WIRING DIAGRAM