2001 TOYOTA SEQUOIA O2 sensor

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1687
1881 Author: Date:
2005 SEQUOIA (RM1146U)
WIRELESS DOOR LOCK CONTROL
SymptomSuspected AreaSee page
All functions of wireless door lock control system do not operate.
1. Transmitter
2. Wireless door lock receiver circuit
3. Key unlock warning switch circuit
4. Body ECUBE±99
DI±1737
DI±1715
IN±35
Lock (or unlock) function does not operate.
1. Door unlock detection switch circuit (Driver's)
(Passenger's)
(Rear Door)
(Back Door)
2. Any door ECU
3. Body ECUDI±1791
DI±1829
DI±1723
DI±1869
IN±35
IN±35
Automatic lock function operates even if any door is opened within
30 seconds after all doors are unlocked by wireless door lock
control system.1. Door courtesy light switch circuit
2. Any door ECU
3. Body ECUDI±1728
IN±35
IN±35
Wireless door lock function operates, but the buzzer does not
sound.1. Wireless door lock buzzer circuit
2. Body ECUDI±1741
IN±35
Buzzer sounds, but wireless door lock function does not operate.Body ECUIN±35
REAR WIPER AND WASHER
SymptomSuspected AreaSee page
Rear wiper does not operate.1. Rear wiper switch and motor circuit
2. Body ECUDI±1704
IN±35
Rear washer does not operate.1. Rear washer switch and motor circuit
2. Body ECUDI±1704
IN±35
LIGHT CONTROL
SymptomSuspected AreaSee page
Automatic light control does not operate.
1. Automatic light control sensor circuit
2. Light control switch circuit
3. Body ECUDI±1753
DI±1750
IN±35
Auto turn±off does not operate.
1. Door courtesy light switch circuit (Driver side)
2. Ignition switch
3. Driver door ECU
4. Body ECUDI±1728
BE±24
IN±35
IN±35
Daytime running light function does not operate.
1. Daytime running light relay circuit
2. Parking brake switch circuit
3. Body ECUDI±1712
DI±1744
IN±35
FOG LIGHT
SymptomSuspected AreaSee page
Fog lights do not come on.
1. Bulb
2. FOG fuse
3. Fog light relay and switch circuit
4. Body ECU±
BE±14
DI±1710
IN±35
OTHERS
SymptomSuspected AreaSee page
Illuminated entry function does not operate.1. Illumination circuit
2. Body ECUDI±1759
IN±35
All functions of the body control system do not operate.1. Power source circuit
2. Body ECUDI±1700
IN±35
Remote control mirror does not operate.
(w/ Driving position memory)1. Remote control mirror switch circuit
2. Driving position memory switch circuit
3. Body ECUDI±1767
DI±1772
IN±35

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1691
1885 Author: Date:
2005 SEQUOIA (RM1146U) TAIL ± GND1
(B6±7 ± B6±6)
G ± W±BLight control switch
(TAIL)Light control switch OFF10 to 14 V
CLTS (*3) ± GND1
(B6±12 ± B6±6)Y ± W±BAutomatic light control
sensor (Signal)Ignition switch OFFBelow 1 V
CLTS (*3) ± GND1
(B6±12 ± B6±6)Y ± W±BAutomatic light control
sensor (Signal)Ignition switch ONSignal waveform
CLTE (*3) ± GND1
(B6±3 ± B6±6)BR ± W±BAutomatic light control
sensor (Ground)AlwaysBelow 1 V
CLTB (*3) ± GND1
(B6±4 ± B6±6)R±G ± W±BAutomatic light control
sensor (IG)Ignition switch OFFBelow 1 V
CLTB (*3) ± GND1
(B6±4 ± B6±6)R±G ± W±BAutomatic light control
sensor (IG)Ignition switch ON10 to 14 V
BZR ± GND1
(B7±15 ± B6±6)LG ± W±BWireless door lock
buzzer signalBuzzer does not soundBelow 1 V
BZR ± GND1
(B7±15 ± B6±6)LG ± W±BWireless door lock
buzzer signalBuzzer sounds10 to 14 V
RLD ± GND1
(B7±26 ± B6±6)L ± W±BPower window control
(Rear LH (DOWN))Ignition switch ONBelow 1 V
RLD ± GND1
(B7±26 ± B6±6)L ± W±BPower window control
(Rear LH (DOWN))Ignition switch ON,
Rear left power window DOWN
operation
10 to 14 V
RLU ± GND1
(B7±25 ± B6±6)G±R ± W±BPower window control
(Rear LH (UP))Ignition switch ONBelow 1 V
RLU ± GND1
(B7±25 ± B6±6)G±R ± W±BPower window control
(Rear LH (UP))Ignition switch ON,
Rear left power window UP op-
eration
10 to 14 V
RRD ± GND1
(B5±20 ± B6±6)L ± W±BPower window control
(Rear RH (DOWN))Ignition switch ONBelow 1 V
RRD ± GND1
(B5±20 ± B6±6)L ± W±BPower window control
(Rear RH (DOWN))Ignition switch ON,
Rear right power window DOWN
operation
10 to 14 V
RRU ± GND1
(B5±19 ± B6±6)G±Y ± W±BPower window control
(Rear RH (UP))Ignition switch ONBelow 1 V
RRU ± GND1
(B5±19 ± B6±6)G±Y ± W±BPower window control
(Rear RH (UP))Ignition switch ON,
Rear right power window UP op-
eration
10 to 14 V
HEAD ± GND1
(B6±9 ± B6±6)G±Y ± W±BLight control switch
(HEAD)Light control switch HEADBelow 1 V
HEAD ± GND1
(B6±9 ± B6±6)G±Y ± W±BLight control switch
(HEAD)Light control switch OFF or TAIL10 to 14 V
PKB ± GND1
(B5±3 ± B6±6)LG±R ± W±BParking brake switch
signalIgnition switch ON, Parking brake
appliedBelow 1 V
PKB ± GND1
(B5±3 ± B6±6)LG±R ± W±BParking brake switch
signalIgnition switch ON, Parking brake
not applied10 to 14 V
GSWGR RAirbag sensor commu-Airbag sensor communicationGSW
(B6±16)GR±RAirbag sensor commu
nication signal
Airbag sensor communication
circuit±
OBD2
(B5±2)G±RDiagnosis signalDLC3 communication circuit±
FFOG ± GND1
(B6±13 ± B6±6)G±B ± W±BFog light switch signalHeadlight dimmer switch LOW,
Fog light switch OFFBelow 1 V

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1693
1887 Author: Date:
2005 SEQUOIA (RM1146U) DOP (*2) ± GND1
(B5±9 ± B6±6)
P ± W±BGlass breakage sensor
ECU communicationArmed stateBelow 1 V
DOP (*2) ± GND1
(B5±9 ± B6±6)P ± W±BGlass breakage sensor
ECU communicationAlarm sounds (on glass break-
age detection)Pulse generation
(See page DI±1774)
(*1): w/ Daytime Running Light
(*2): w/ Glass Breakage Sensor
(*3): w/ Automatic Light Control
(*4): w/ Driving Position Memory
(*5): w/ Sliding Roof

DID99±01
DI±1694
± DIAGNOSTICSBODY CONTROL SYSTEM
1888 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
According to the DATA LIST displayed by the hand±held tester, you can read the values of the switches,
sensors, actuators and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting
is one of the methods to shorten labor time.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on the tester, read the ºDATA LISTº.
BODY ECU:
ItemMeasurement Item/Display
(Range)Normal ConditionDiagnostic Note
KEY UNLK WRN SWKey unlock warning switch/ON or
OFFON: Key is in ignition key cylinder
OFF: No key is in ignition key cyl-
inder
±
ACC SWACC switch/ON or OFFON: Ignition switch ACC
OFF: Ignition switch OFF±
IG SWIG switch/ON or OFFON: Ignition switch ON
OFF: Ignition switch OFF±
PARKING BRAKE SWParking brake switch/ON or OFF
ON:
Parking brake pedal depressed
(ON)
OFF:
Parking brake released (OFF)
±
HOOD COURTSY SWHood courtesy switch/ON or OFF
ON: Engine hood OPEN
(Hood courtesy switch ON)
OFF: Engine hood CLOSED
(Hood courtesy switch OFF)
±
D DOR CTY SWDriver door courtesy light switch/
ON or OFFON: Driver door is opened
OFF: Driver door is closed±
P DOR CTY SWFront passenger door courtesy
light switch/ON or OFF
ON: Front passenger door is
opened
OFF: Front passenger door is
closed
±
Rr DOR CTY SWRear passenger door courtesy
light switch/ON or OFF
ON: Rear passenger door is
opened
OFF: Rear passenger door is
closed
±
MIRR SEL SW RRemote control mirror switch pas-
senger side/ON or OFF
ON: Remote control mirror switch
passenger side is selected
OFF: Remote control mirror switch
passenger side is not selected
±
MIRR SEL SW LRemote control mirror switch driv-
er side/ON or OFF
ON: Remote control mirror switch
driver side is selected
OFF: Remote control mirror switch
driver side is not selected
±
MIRR POS SW RRemote control mirror switch R
position/ON or OFF
ON: Remote control mirror switch
R position is selected
OFF: Remote control mirror switch
R position is not selected
±

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1695
1889 Author: Date:
2005 SEQUOIA (RM1146U)MIRR POS SW L
Remote control mirror switch L
position/ON or OFF
ON: Remote control mirror switch
L position is selected
OFF: Remote control mirror switch
L position is not selected
±
MIRR POS SW UPRemote control mirror switch UP
position/ON or OFF
ON: Remote control mirror switch
UP position is selected
OFF: Remote control mirror switch
UP position is not selected
±
MIRR POS SW DWNRemote control mirror switch
DOWN position/ON or OFF
ON: Remote control mirror switch
DOWN position is selected
OFF: Remote control mirror switch
DOWN position is not selected
±
AUTO LIGHT SWLight control switch (AUTO)/ON or
OFF
ON: Light control switch position is
AUTO
OFF: Light control switch position
is not AUTO
±
HEAD LIGHT SWLight control switch (HEAD)/ON or
OFF
ON: Light control switch position is
HEAD
OFF: Light control switch position
is not HEAD
±
TAIL LIGHT SWLight control switch (TAIL)/ON or
OFF
ON: Light control switch position is
TAIL
OFF: Light control switch position
is not TAIL
±
ILLUMINATE RATEIllumination rate information/
MIN: 0 MAX: 99.99Condition value will be displayed
Normal value: 0.8 ms to 22.0 ms±
SEAT M1 SWMemory seat switch (M1)/ON or
OFF
ON: Memory seat switch position
is M1
OFF: Memory seat switch position
is not M1
±
SEAT M2 SWMemory seat switch (M2)/ON or
OFF
ON: Memory seat switch position
is M2
OFF: Memory seat switch position
is not M2
±
SEAT SET SWMemory seat switch (SET)/ON or
OFF
ON: Memory seat switch position
is SET
OFF: Memory seat switch position
is not SET
±
GLS BRK DETECTGlass breakage sensor/ON or
OFF
ON: Glass breakage sensor oper-
ates
OFF: Glass breakage sensor does
not operate
±
WIRELESS OPERWireless door lock control func-
tion/ON or OFF
ON: Wireless door lock function
operated
OFF: Wireless door lock function
not operated
±
OPEN DOOR WARNDOOR indicator light/ON or OFFON: Any door is open
OFF: All doors are closed±
AUTO LOCK DELAYAuto lock delay/60s or 30sCustomized value will be dis-
played±
UNLOCK/2OPER2 time operation wireless unlock
signal/ON or OFFCustomized condition will be dis-
played±

DI94R±07
I28393
Hood Courtesy Switch Engine Room J/B
 ECU±B Fuse
 Door No. 2 Fuse
 H±LP RH Fuse (*2)
 H±LP LH Fuse (*2)
 DRL Fuse (*1)
Rear Washer Motor
Horn
Headlight
Rear washer switch
Ignition Switch
 Key Unlock Switch
DLC3 Body ECU
Instrument Panel J/B
 ECU±IG Fuse
 RAD No. 2 Fuse
 FOG Fuse
 FOG LIGHT Relay
 POWER MAIN Relay
 WSH Fuse
 STOP Fuse
 TAILLIGHT Relay Back Door Power
Window SwitchTheft Horn
Engine Room R/B
No.2
 DIMMER Relay
 DRL No. 4 Relay
 H±LP RH Fuse (*1)
 H±LP LH Fuse (*1)
 H±LP RL Fuse (*1)
 H±LP LL Fuse (*1)
Fog Light
Wireless Door
Control Receiver Wireless Door Lock Buzzer
Combination Meter Memory Seat Switch
(*1): w/ Daytime Running Light
(*2): w/o Daytime Running Light (Located behind
the instrument panel)
(Located behind
the heater control panel)
 DOME Fuse
 HEAD Relay
 HORN Relay
 DOME Fuse
Automatic Light Control Sensor
Stop Light Switch
Remote Control Mirror SwitchGlass Breakage
Sensor Microphone Glass Breakage
Sensor ECU
Combination Switch
 Light Control Switch
 Headlight Dimmer Switch
 Fog Light Switch DI±1698
± DIAGNOSTICSBODY CONTROL SYSTEM
1892 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LOCATION

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

I03114
A27
Automatic Light
Control Sensor
CLTS Y
R±G
BRCLTB
CLTEBody ECU
12
B6 4
1
34
B6
3
B6 CLTS
CLTB
CLTE
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1753
1947 Author: Date:
2005 SEQUOIA (RM1146U)
Automatic light control sensor circuit
CIRCUIT DESCRIPTION
The body ECU detects the ambient light level outside the vehicle via the automatic light control sensor.
The body ECU turns the headlights ON and OFF based on the ambient light level sensed by the automatic
light control sensor.
WIRING DIAGRAM
DI1OL±28