2001 TOYOTA SEQUOIA instrument panel

I24144
Body ECU
MAINEngine Room J/B
HEAD Relay
Instrument Panel J/B
Battery
LG±R 2D
B12FL
R±W
12 532F
2G
2C
B7 1G 1JL
R±L
R±L
HRLY 8
6
1
6
1
2
(*1): w/ Daytime Running Light
(*2): w/o Daytime Running LightLG±R69 8 To Headlight RH To Headlight LH To DRL No.4 Relay To DIMMER Relay To DIMMER Relay
B 4
5 F10
FL Block(*2) (*2) (*1)
(*1)
(*1)
H±LP RH (*2)
DRL (*1)
H±LP LH (*2)
(*1) DI±1708
± DIAGNOSTICSBODY CONTROL SYSTEM
1902 Author: Date:
2005 SEQUOIA (RM1146U)
Headlight Relay Circuit
CIRCUIT DESCRIPTION
HEAD relay will be ºONº by operating the light control switch. The transistor which activates the HEAD relay
has two sorts: one is activated by the light control switch for fail safe and the other is activated by CPU. The
one that is activated by CPU prevents the headlight from turning off at the time of trouble with the other sys-
tem in the automatic operation circuit.
When the theft deterrent system is activated, it causes the transistor in the ECU to switch ON and OFF at
approximately 0.25 sec. intervals. This switches the HEAD relay ON and OFF, and thus flashing the head-
lights (See the wiring diagram below).
In this condition, if any of the following operations is done, the transistor in the ECU goes OFF and the HEAD
control relay switches OFF, and thus stopping the headlights flashing:
(1) Unlock the front LH or RH door with a key.
(2) Turn the ignition switch to ACC or ON position.
(3) Unlock the doors with the wireless door lock control system.
(4) Wait for approximately 60 seconds.
WIRING DIAGRAM
DI5VQ±14

I28516
J5
J/CBody ECU
FFOG J50
J/C J3
J/C
5 Instrument Panel J/B
From DIMMER Relay (*1) FOG LIGHT Relay
FOG
1K7
1B9
1J10 1L1
3
1 2 D
D
D
1
2F2
Front Fog
Light RH
W±B
B 1
2P
W±B
EDIGALTF10
FL Block 8
5
B
BatteryR±W
C8 Combination Switch

Fog Light Switch
B613
G±B
10
LFG BFG 11 P
F1
Front Fog
Light LH
G±W (*1)
Y±R (*2) WP
A
(*1): w/ Daytime Running Light
(*2): w/o Daytime Running LightB
J2
J/C B
BW±B
J18
J/C W±B W±B
IL1
From Headlight (*2) 16
A DI±1710
± DIAGNOSTICSBODY CONTROL SYSTEM
1904 Author: Date:
2005 SEQUOIA (RM1146U)
Front fog light relay and switch circuit
CIRCUIT DESCRIPTION
The fog light switch is built into the combination switch.
Turning the fog light switch ON supplies power to terminal FFOG of the body ECU.
The fog lights come on when the FOG light relay is turned on.
WIRING DIAGRAM
DI6U4±14

I18742
Body ECU
IEW±BIND 12
A17
BR
J8
J/CGR 9
1F 1D6
C6C5 Combination Meter
16
B5 Security Instrument Panel J/B
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1731
1925 Author: Date:
2005 SEQUOIA (RM1146U)
Theft deterrent indicator circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is preparing to set, this circuit turns on the indicator light. When the system
has been set, it continually turns the indicator light on for 1 second and turns it off for 1 second, and thus
blinking the indicator light.
This theft deterrent indicator sends a key judgment of the immobilizer to the transponder key ECU.
WIRING DIAGRAM
DI579±09

I24356
32
1J 1E W±RBody ECU
RDA ECU±B
4
52D
5
4
B5PRG B
OW±R
B5 5
IG1
BatterySHORT PIN Engine Room J/B
1
2C8
Sub J/B No. 3
3A2
3A1
RDA PRG W2
Wireless Door
Control Receiver
+B
EV
R±G 3
2 W±RInstrument Panel J/B
F10
Fusible
Link
Block
BW±R
A J43
J/C
O
A
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1737
1931 Author: Date:
2005 SEQUOIA (RM1146U)
Wireless door lock receiver circuit
CIRCUIT DESCRIPTION
The signal from the transmitter is sent to the body ECU through RDA line of the wireless door control receiver.
RDA line is diagnosed by the body ECU, check DTC also in case of the failure of the wireless function.
WIRING DIAGRAM
DI6LV±13

I18747
Body ECU
Instrument Panel J/BHEAD
TAIL
A G±Y
G
L±R (*1)B6
137 9
H
TELA
OFF
TAIL
HEAD
AUTO Light
Control
Switch
16
W±B
1B7 9
1F J8
J/C
W±B
A
IE10
14 12
(*1): w/ Automatic Light ControlB6
B6
C8
Combination Switch DI±1750
± DIAGNOSTICSBODY CONTROL SYSTEM
1944 Author: Date:
2005 SEQUOIA (RM1146U)
Light control switch circuit
CIRCUIT DESCRIPTION
The body ECU detects the light control switch position and drives the DRL No. 4 and HEAD relays.
If the vehicle is equipped with an automatic light control system, the light control switch includes the AUTO
position.
The body ECU turns the headlights ON and OFF based on the ambient light level outside the vehicle, which
is detected by the automatic light control sensor.
WIRING DIAGRAM
DI1OL±27

I28521
1B
1B1
2
7
1B 1F9Y±R
B6
B6 11
8
R±L Instrument Panel J/B
Y±R
W±BHF HU
J8
J/C A
IE16 LOW
HIGH
FLASH Headlight
Dimmer
Switch
W±BC8 Combination Switch
EL HF HU87Body ECU w/ Daytime Running Light:
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1755
1949 Author: Date:
2005 SEQUOIA (RM1146U)
Headlight dimmer switch circuit
CIRCUIT DESCRIPTION
This circuit detects the headlight dimmer switch condition.
w/ daytime running light:
The body ECU detects the headlight dimmer switch position and turns on the DIMMER relay.
The body ECU informs the combination meter of the headlight dimmer switch condition via BEAN.
When the headlight dimmer switch position is HI or FLASH, the HI beam indicator light on the combination
meter comes on.
w/o daytime running light:
When the headlight dimmer switch position is HI or FLASH, the HI beam indicator light on the combination
meter comes on.
When the HI beam headlights come on, current is supplied to the HI beam indicator light on the combination
meter to turn the indicator light on.
WIRING DIAGRAM
DI94U±08

I28522
Body ECU
R±L
B6
HF
B6 Instrument Panel J/B
Combination MeterHU 1B
1BY±R
1F
1B21
79
6
1D
AJ8
J/C118
B
R±GIE Headlight
Dimmer
SwitchLOW
HIGH
FLASHHL
HU HF EL 17
87
BR W±B Y±R
C6C6 1712W±B

HIGH Beam Indicator R±G
C8 Combination Switch
16 w/o Daytime Running Light:
R±G
B BB R±G
R±G 11
2
IA5 IA1
R±G
To Head Light RH
To Head Light LH J4
J/C DI±1756
± DIAGNOSTICSBODY CONTROL SYSTEM
1950 Author: Date:
2005 SEQUOIA (RM1146U)

I28523
Back Door ECU
Sub J/B No. 3 ILE
B118
BF18
BD29
WWWW
J30J/C
J29 FMInstrument Panel J/BBody ECU
1G6
1G5
1M10
1E3
1G13
1G14
1E81M6
1J5ILE B73
1F 10
1M7W
3C
3A3A
3D6 6
16 6I17
Ignition Key
Cylinder Light
12W
R
R6R
J48R
J/C
J49
BC1 LF R
D13 Door Courtesy
Light Rear RH
12
D17 Door Courtesy
Light Switch Rear RH2 1
W±B
BA161
2
2
IN1R
A AJ21
J/C R
R 1B±O
2 1 D8 Diode
(Interior Light No. 1)BC17
R±YR±YW±B RW±B W±BRRRW (*1)
W (*2)
W
R
12 S8 Step Light
V7 Vanity Light RH
V6 Vanity Light LH
R11 Rear Interior Light
(*4) (*3) To Dome Fuse
W±B
W±B
W
G±R(*2)
(*2)
(*2) 1
2
4
de f g bc aR
(*2)
3ON
DoorOFF R
R DI±1760
± DIAGNOSTICSBODY CONTROL SYSTEM
1954 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
(*1): w/o Sliding Roof, RSE and RSA
(*2): w/ Sliding Roof, RSE or RSA
(*3): w/ Sliding Roof w/ RSE or RSA
(*4): w/ Sliding Roof w/o RSE and RSA