2001 TOYOTA SEQUOIA Service Repair Manual

spare wheel climate control ad blue tire type steering wheel checking oil

Page 2169 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DID9Q±01
± DIAGNOSTICSAUDIO SYSTEM
DI±1967
2161 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
NOTICE:
For the troubleshooting procedures of the audio system with a navigation syst

DID9Q±01
± DIAGNOSTICSAUDIO SYSTEM
DI±1967
2161 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
NOTICE:
For the troubleshooting procedures of the audio system with a navigation system, refer to the navi-
gation system (See page DI±2184).
RADIO RECEIVER ASSY
HINT:
Inspect the ºFuseº and ºRelayº before confirming the suspected area as shown in the charts below.
SymptomSuspected AreaSee page
Pressing power switch does not start system.3. Power source circuit (radio receiver assy)
4. Radio receiver assyDI±1990
±
A audio system cannot be operated.1. Steering pad switch circuit
2. Radio receiver assyDI±1995
±
No sound cannot be heard (Separate type amplifier).
1. Power source circuit (stereo component amplifier assy)
2. Sound signal circuit
3. Speaker circuit
4. AVC±LAN circuit (radio receiver assy ± stereo compo-
nent amplifier)
5. AVC±LAN circuit (radio receiver assy ± rear seat audio
controller) w/ RSA system
6. AVC±LAN circuit (radio receiver assy ± multi±display
controller) w/ RSE system
7. Mute signal circuit
8. Stereo component amplifier assy
9. Radio receiver assyDI±1993
DI±2011
DI±2013
DI±2023
DI±2061
DI±2139
DI±2008
±
±
No sound cannot heard (Built±in type amplifier).
1. Power source circuit (radio receiver assy)
2. Speaker circuit
3. Radio receiver assyDI±1990
DI±2013
±
Sound quality is bad in all modes (volume is too low).
(Separate type amplifier)
1. Power source circuit (radio receiver assy)
2. Power source circuit (stereo component amplifier assy)
3. Speaker circuit
4. Sound signal circuit
5. Sound quality is bad in all modes (volume is too low)
6. Stereo component amplifier assyDI±1990
DI±1993
DI±2013
DI±2011
DI±2026
±
Sound quality is bad in all modes (volume is too low).
(Built±in type amplifier)1. Power source circuit (radio receiver assy)
2. Speaker circuit
3. Sound quality is bad in all modes (volume is too low)DI±1990
DI±2013
DI±2026
Noise occurs.±DI±2027
Radio broadcast cannot be received (bad reception).±DI±2028
CD cannot be inserted or is ejected right after insertion.1. Power source circuit (radio receiver assy)
2. CD cannot be inserted or is ejected right after insertionDI±1990
DI±2030
CD cannot be ejected.1. Power source circuit (radio receiver assy)
2. CD cannot be ejectedDI±1990
DI±2032
Sound quality is bad only when playing CD (volume is too low).±DI±2033
CD sound skips.±DI±2034
Cassette tape cannot be inserted or played.1. Power source circuit (radio receiver assy)
2. Cassette tape cannot be inserted or playedDI±1990
DI±2036
Cassette tape cannot be ejected.1. Power source circuit (radio receiver assy)
2. Cassette tape cannot be ejectedDI±1990
DI±2038
Sound quality is bad only when playing tape.±DI±2040
Tape is tangled due to incorrect tape speed or auto±reverse mal-
function.±DI±2042

Page 2170 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±1968
± DIAGNOSTICSAUDIO SYSTEM
2162 Author: Date:
2005 SEQUOIA (RM1146U)
STEERING PAD SWITCH
SymptomSuspected AreaSee page
A audio system cannot be operated with steering pad switch.1. Steeri

Page 2171 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DID9R±01
I28312
R4R19R20
± DIAGNOSTICSAUDIO SYSTEM
DI±1969
2163 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
1. RADIO RECEIVER ASSY (SEPARATE TYPE AMPLIFIER)
Symbols (Terminal No.)Wiri

DID9R±01
I28312
R4R19R20
± DIAGNOSTICSAUDIO SYSTEM
DI±1969
2163 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
1. RADIO RECEIVER ASSY (SEPARATE TYPE AMPLIFIER)
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecification
BU+B (R4±1) ± GND (R4±20)L±Y ± BRBatteryAlways10 to 14 V
ILL+ (R4±2) ± GND (R4±20)G ± BRIllumination (dimmer)
signalLight control switch OFF " TAIL or
HEADBelow 1 V "
10 to 14 V
TX+ (R4±5) ± GND (R4±20)V ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
MUTE (R4±7) ± GND (R4±20)R±W ± BRMUTE signalAudio system is playing "changing
modeAbove 3.5 V "
Below 1 V
R+ (R4±8) ± GND (R4±20)W ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sounds is
output
L+ (R4±9) ± GND (R4±20)B ± BRSound signal
(Left output)Audio system is playing
A waveform synchro-
nized with sounds is
output
GND (R4±10) ± Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
ACC+B (R4±11) ±
GND (R4±20)GR ± BRAccessory (ON)Turn ignition switch to OFF "ACC10 to 14 V
ILL± (R4±12) ± GND (R4±20)W±G ± BRIllumination (rheostat)
signalLight control switch TAILBelow 1 V "
10 to 14 V
ANT+B (R4±13) ±
GND (R4±20)B±R ± BRPower source of antennaRadio switch ON and AM or FM10 to 14 V
TX± (R4±15) ± GND (R4±20)P ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
R± (R4±18) ± GND (R4±20)G ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sounds is
output
L± (R4±19) ± GND (R4±20)R ± BRSound signal
(Left output)Audio system is playing
A waveform synchro-
nized with sounds is
output
GND (R4±20) ± Body groundBR ±
Body groundGroundAlwaysBelow 1 V
GND (R19±6) ± GND (R4±20)BR±W ± BRSteering pad switch
groundAlwaysBelow 1 V
SW1 (R19±7) ± GND (R4±20)LG±R ± BRSteering pad switch signal
Steering pad switch not operating.
"SEEK+ switch push
"SEEK± switch push
"VOL+ switch push
"VOL± switch push4 V or more
"Approx. 0.5 V
"Approx. 0.9 V
"Approx. 2.0 V
"Approx. 3.4 V
SW2 (R19±8) ± GND (R4±20)GR±R ± BRSteering pad switch signalSteering pad switch not operating
"MODE switch push4 V or more "
Below 2.5 V

Page 2172 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±1970
± DIAGNOSTICSAUDIO SYSTEM
2164 Author: Date:
2005 SEQUOIA (RM1146U) (*1) TX1+ (R19±9) ±
GND (R4±20)
L ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*1) TX1± (R19±10

DI±1970
± DIAGNOSTICSAUDIO SYSTEM
2164 Author: Date:
2005 SEQUOIA (RM1146U) (*1) TX1+ (R19±9) ±
GND (R4±20)
L ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*1) TX1± (R19±10) ±
GND (R4±20)LG ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*1) SLD1 (R19±14) ±
Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
(*1) RSR+ (R19±15) ±
GND (R4±20)W ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1) RSR± (R19±16) ±
GND (R4±20)G ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1) RSL+ (R19±17) ±
GND (R4±20)B ± BRSound signal
(Left output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1) RSL± (R19±18) ±
GND (R4±20)R ± BRSound signal
(Left output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1) RMU (R19±19) ±
GND (R4±20)R±W ± BRMUTE signalAudio system is playing "
changing modeAbove 3.5 V "
Below 1 V
(*1) S±GND (R20±1) ±
Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
(*1) R+ (R20±2) ±
GND (R4±20)W ± BRSound signal
(Right input)Rear seat entertainment system is
playingA waveform synchro-
nized with sound is out-
put
(*1) R± (R20±3) ±
GND (R4±20)G ± BRSound signal
(Right input)Rear seat entertainment system is
playingA waveform synchro-
nized with sound is out-
put
(*1) L+ (R20±4) ± GND (R4±20)B ± BRSound signal
(Left input)Rear seat entertainment system is
playingA waveform synchro-
nized with sound is out-
put
(*1) L± (R20±5) ± GND (R4±20)R ± BRSound signal
(Left input)Rear seat entertainment system is
playingA waveform synchro-
nized with sound is out-
put
(*1) MUTE (R20±6) ±
GND (R4±20)R±G ± BRMUTE signalRear seat entertainment system is
playing " changing modeAbove 3.5 V "
Below 1 V
(*2) TX1+ (R19±9) ±
GND (R4±20)L ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*2) TX1± (R19±10) ±
GND (R4±20)LG ± BRAVC±LAN
communication signalIgnition switch ON2 to 3 V
(*2) SLD1 (R19±14) ±
Body groundShielded ±
Body groundShield groundAlwaysBelow 1 V
(*2) RSR+ (R19±15) ±
GND (R4±20)W ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*2) RSR± (R19±16) ±
GND (R4±20)G ± BRSound signal
(Right output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*2) RSL+ (R19±17) ±
GND (R4±20)B ± BRSound signal
(Left output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*2) RSL± (R19±18) ±
GND (R4±20)R ± BRSound signal
(Left output)Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*2) RMU (R19±19) ±
GND (R4±20)R±W ± BRMUTE signalAudio system is playing "
changing modeAbove 3.5 V "
Below 1 V

Page 2173 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual I28313
R2R3R19
± DIAGNOSTICSAUDIO SYSTEM
DI±1971
2165 Author: Date:
2005 SEQUOIA (RM1146U)
*1: w/ Rear seat entertainment system
*2: w/ Rear seat audio system
2. RADIO RECEIVER ASSY (BUILT±IN T

I28313
R2R3R19
± DIAGNOSTICSAUDIO SYSTEM
DI±1971
2165 Author: Date:
2005 SEQUOIA (RM1146U)
*1: w/ Rear seat entertainment system
*2: w/ Rear seat audio system
2. RADIO RECEIVER ASSY (BUILT±IN TYPE AMPLIFIER)
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecification
FR+ (R2±1) ± GND (R2±7)LG ± BRSound signal (Front Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
FL+ (R2±2) ± GND (R2±7)P ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
ACC+B (R2±3) ± GND (R2±7)GR ± BRAccessory (ON)Turn ignition switch to OFF " ACCBelow 1 V "
10 to 14 V
BU+B (R2±4) ± GND (R2±7)L±Y ± BRBatteryAlways10 to 14 V
FR± (R2±5) ± GND (R2±7)L ± BRSound signal (Front Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
FL± (R2±6) ± GND (R2±7)V ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
GND (R2±7) ± Body groundBR ±
Body groundGroundAlwaysBelow 1 V
ANT+B (R2±8) ± GND (R2±7)B±R ± BRPower source of antennaRadio switch ON and AM or FM10 to 14 V
ILL+ (R2±10) ± GND (R2±7)G ± BRIllumination (rheostat) sig-
nalLight control switch OFF " TAIL or
HEADBelow 1 V "
10 to 14 V
RR+ (R3±1) ± GND (R2±7)R ± BRSound signal (Rear Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
RL+ (R3±2) ± GND (R2±7)B ± BRSound signal (Rear Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
RR± (R3±3) ± GND (R2±7)W ± BRSound signal (Rear Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
ILL± (R3±5) ± GND (R2±7)W±G ± BRIllumination (rheostat) sig-
nalLight control switch OFF " TAIL or
HEADBelow 1 V "
10 to 14 V
RL± (R3±6) ± GND (R2±7)Y ± BRSound signal (Rear Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
GND (R19±6) ± GND (R2±7)BR±W ± BRSteering pad switch
groundAlwaysBelow 1 V

Page 2174 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual I28722
S10S9 DI±1972
± DIAGNOSTICSAUDIO SYSTEM
2166 Author: Date:
2005 SEQUOIA (RM1146U) SW1 (R19±7) ± GND (R2±70)
LG±R ± BRSteering pad switch signal
Steering pad switch not operating.
"SE

I28722
S10S9 DI±1972
± DIAGNOSTICSAUDIO SYSTEM
2166 Author: Date:
2005 SEQUOIA (RM1146U) SW1 (R19±7) ± GND (R2±70)
LG±R ± BRSteering pad switch signal
Steering pad switch not operating.
"SEEK+ switch push
"SEEK± switch push
"VOL+ switch push
"VOL± switch push4 V or more
"Approx. 0.5 V
"Approx. 0.9 V
"Approx. 2.0 V
"Approx. 3.4 V
SW2 (R19±8) ± GND (R2±7)GR±R ± BRSteering pad switch signalSteering pad switch not operating
"MODE switch push4 V or more "
Below 2.5 V
3. STEREO COMPONENT AMPLIFIER ASSY
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecification
B+ (S9±1) ± E (S9±16)L±W ± BRBatteryAlways10 to 14 V
RL+ (S9±4) ± E (S9±16)B ± BRSound signal (Rear Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
RR+ (S9±5) ± E (S9±16)R ± BRSound signal (Rear Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
FL+ (S9±2) ± E (S9±16)P ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
FR+ (S9±3) ± E (S9±16)LG ± BRSound signal (Front Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
WFL+ (S9±6) ±
E (S9±16)L±W ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
WFR+ (S9±7) ±
E (S9±16)R ± BRSound signal (Front Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
B2+ (S9±10) ± E (S9±16)L±W ± BRBatteryAlways10 to 14 V
RL± (S9±13) ± E (S9±16)Y ± BRSound signal (Rear Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
RR± (S9±14) ± E (S9±16)W ± BRSound signal (Rear Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
GND (S9±15) ± Body groundBR ±
Body groundGroundAlwaysBelow 1 V
E (S9±16) ± Body groundBR ±
Body groundGroundAlwaysBelow 1 V
FL± (S9±11) ± E (S9±16)V ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
FR± (S9±12) ± E (S9±16)L ± BRSound signal (Front Right)Audio system is playing
A waveform synchro-
nized with sounds is
output

Page 2175 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSAUDIO SYSTEM
DI±1973
2167 Author: Date:
2005 SEQUOIA (RM1146U) WFL± (S9±17) ±
E (S9±16)
G ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with s

Page 2176 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DID9S±01
I24383
º1chº Switch
ºSEEK TRACKº
DOWN SwitchºSEEK TRACKº
UP SwitchºDISCº Switch º2chº Switchº3chº Switch
º4chº Switchº5chº Switch
º6chº Switch
DI±1974
± DIAGNOSTICSAUDIO

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