2001 TOYOTA SEQUOIA battery

I28471
Combination MeterMemory Seat ECU
& SW
Sub J/B No. 3J/C
J24
J/C
Instrument Panel J/B
F10
Fusible Link BlockI18
Ignition SW
Engine Room J/B
Battery
BHJ24
J/C J/C
J/C C5 J33 BI2 M6J34
J31 J32
3A 3AJ33 J34
J33 J34BI2
BI2 BI2
M6
M6 M7
AM1 ECU±IG
1F
1L
1J 1E 1G1C
1 4
6
1 16
2
1C
2 4
PWR SEAT
1 2
M7 BI2 ECU±B
Short Pin
2D 2C18 ALT
IG1 AM1 12
BB
W±B
W±B W±B
B58W W±L
W±R W±RB±Y B±R
L±O
3 W±R
W±RW±R W±R B±R B±R B±R L±O
L±O L±O L±O
3 111 8151641
5
A 9 C
A GG A
WWW17 30
CL
I FMPX1
+B
IG
SYSB
GND 1 4
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1947
2141 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

I28472
S19
Sliding Roof
Control ECUInstrument Panel J/BBody ECU
I18
Ignition SW
Instrument Panel J/B
F10
Fusible Link Block
Battery
IEJ8
J/C MPX1
E
B IGMPX3
IG1 AM11 2
AM1 ECU±IG
1F 1L 1MB7
1
6
12
1C4
SUN±ROOF
7 ALT
58W
AW±B B
W±B 1
5
1M
1M 10W±L
L±W B±RW±L
B±Y 2
7
51M 1G
L±WW±B G±O G±O
B±R 89
1220
1C DI±1950
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2144 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

I28473
Combination Meter
F18
Front Passenger
Door ECUBack Door ECU
Sub J/B No. 3I18
Ignition SW Instrument Panel J/B
F10
Fusible Link Block
Engine Room J/BInstrument Panel J/B
Sub J/B No. 3
Battery
BJJ19
J/CJ22
J/C J37
J/CJ/C
J/C J33 J34
J33 J34 C5B11 BF1 BD2
II2B11
B11
B11 BF1 BD2
BD2 BF1 IN1
AM1 ECU±IG
1F
1L
1G1C
14
6
12
1C
154
12PWR No. 5 ALT
58
43C 3A88AAGAB H
IG1
AM1
1 26 7 312
1
6
4 2
5 11 1114 8
BB B B B
20 (*1)LG±R
B±RLG±R LG±R LG±R
B±RB±R B±R B±R
B±R B±Y
W±L W
B B
L±W L±W L±W L±W
W±R
W±R W±R
W±R W±R W±R
W±B W±B W±B W±B
A212
BB3 5
B11
B11 10 12 11 2
3A 3C
BD2 BF1
BF1 BD1IN1BF1 BD1 IC4
2 3 8 1
1J
1E 2C 2DECU±B
Short Pin
23
10MPX1
SIG
BDR
GND MPX2
BECU MPX1
*1: w/ Driving Position Memory
*2: w/o Driving Position Memory 10 (*2)
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1953
2147 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

DID9J±01
± DIAGNOSTICSAUDIO SYSTEM
DI±1955
2149 Author: Date:
2005 SEQUOIA (RM1146U)
AUDIO SYSTEM
PRECAUTION
NOTICE:
When disconnect the battery terminal, initialize the following systems after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77

DID9N±01
Vehicle brought into a workshop
3. Check the diagnostic trouble codes
DTC is not output (Go to step 5)
4. Diagnostic trouble code chart.
Go to step 6
6. Circuit inspection and part inspection
8. Perform confirmation test
ENDItems inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
P. DI±1974
P. DI±1990 ± DI±2042 P. DI±1979 1. Customer problem analysis
P. DI±1963
(a) Interview and confirm the trouble.
(1) Confirm the condition of the trouble.
(a) Basic inspection
(1) Check the battery voltage. 2. Basic inspection.
Standard: 11 to 14 V
(b) Check the power supply to the radio receiver assy.
(1) Turn the ignition switch to the ACC position.
(2) Check whether or not the display appears on the radio receiver assy.Display does not appear (Proceed to problem
symptom table)
Display appears
DTC is output
5. Problem symptoms table
P. DI±1967
7. Identification of problem
P. DI±1967 DI±1962
± DIAGNOSTICSAUDIO SYSTEM
2156 Author: Date:
2005 SEQUOIA (RM1146U)
HOW TO PROCEED WITH TROUBLESHOOTING

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

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

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