2001 TOYOTA SEQUOIA horn

MA002±35
MA±2
± MAINTENANCEINSIDE VEHICLE
49 Author: Date:
2005 SEQUOIA (RM1146U)
INSIDE VEHICLE
GENERAL MAINTENANCE
These are maintenance and inspection items which are considered to be the owner's responsibility.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item can cause the engine to run poorly and increase exhaust emissions.
2. LIGHTS
(a) Check that the headlights, stop lights, taillights, turn signal lights, and other lights are all working.
(b) Check the headlight aim.
3. WARNING LIGHTS AND BUZZERS
Check that all warning lights and buzzers function properly.
4. HORN
Check that it is working.
5. WINDSHIELD GLASS
Check for scratches, pits or abrasions.
6. WINDSHIELD WIPER AND WASHER
(a) Check operation of the wipers and washer.
(b) Check that the wipers do not streak.
7. WINDSHIELD DEFROSTER
Check that air comes out from the defroster outlet when operating the heater or air conditioner.
8. REAR VIEW MIRROR
Check that it is mounted securely.
9. SUN VISORS
Check that they move freely and are mounted securely.
10. STEERING WHEEL
Check that it has the specified free play. Be alert for changes in steering condition, such as hard steering,
excessive free play or strange noises.
11. SEATS
(a) Check that the seat adjusters operate smoothly.
(b) Check that all latches lock securely in any position.
(c) Check that the head restraints move up and down smoothly and that the locks hold securely in any
latch position.
(d) For fold±down seat backs, check that the latches lock securely.
12. SEAT BELTS
(a) Check that the seat belt system such as the buckles, retractors and anchors operate properly and
smoothly.
(b) Check that the belt webbing is not cut, frayed, worn or damaged.

H10600H01012H24646H24648
CG TCDTC B1630/23
DLC3
Airbag
Sensor
Assembly
Curtain Shield
Airbag Sensor
Assembly RH
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1193
1387 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the airbag sensor assembly.
(d) Disconnect the connectors from the horn button assembly.
(e) Disconnect the connectors from the front passenger airbag assembly.
(f) w/ Side and curtain shield airbag:
Disconnect the connectors from the front seat airbag assembly LH and RH.
(g) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(h) Disconnect the connectors from the front seat outer belt assembly LH and RH.
1 Check DTC.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly.
(b) Connect the negative (±) terminal cable to the battery,
and wait for at least 2 seconds.
CHECK:
(a) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(b) Clear the DTCs stored in memory (see page DI±1147).
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e) Check the DTCs (see page DI±1147).
OK:
DTC B1630/23 is not output.
HINT:
Codes other than DTC B1630/23 may be output at this time, but
they are not related to this check.
NG Go to step 2.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check (see page DI±1137).

DID98±01
I28587
From Battery Driving Position Memory Switch BODY ECU
Courtesy SW (D)
MM
Remote Control Mirror Switch
RHOuter
Mirror LH
(Retract
Motor) M1
M2 MM
M1 DCTY
PCTY
RRCY
RLCY
HCTY
KSW
LSWR
LSWL
PKB
WIG
IG
ACC
BECU
S+B
BDRACT+
ACTD
ACT±M2
MIRB
MIRS
MIRFM+
MSW
EB
MF
E2MR
Door Lock Motor
Front
LHFront
RHRear
LHRear
RH
Courtesy SW (P)
Courtesy SW (RR)
Courtesy SW (RL)
Hood Courtesy SW
Key Unlock Warning SW
Door Unlock Detection
SW Rear RH
Door Unlock Detection
SW Rear LH
Parking Brake SW
Battery AM1ALTACC IG1 Ignition SwitchWSH
ECU±IG
RAD No. 2
ECU±B
DOOR No. 2SECURITY
HORN AM1
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1679
1873 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

I28734
BODY ECU
Back Door
Power Window SW
Rear Wiper
and
Washer
Switch
Rear Washer
Motor
Theft Deterrent Horn
Light
Control
Sensor
Wireless
Door Lock
Receiver ECU±B From
Battery
DLC3From
Battery
POWER MAIN
Power
Window SW
(RR)Power
Window
Motor (RR)PWR
No. 3
PWR
No. 2
Power
Window SW
(RL)Power
Window
Motor (RL)
From
Battery
From
Battery DOME
HORN Interior Light
HORN
Vehicle Horn
Combination Meter
Security Indicator
Horn Switch
Glass
Breakage
Sensor ECUWireless Buzzer
ECU±B
HTR PWS
BUP
BDN
RWLS
RWC1
RWW
SHTRCY
RRU
RRD
RLU
RLD
ILE
CLTB
CLTS
CLTEHR
RDA
PRG
GND1IND
HORN
BZR
OBD2DOP
Microphone
From
Battery
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1681
1875 Author: Date:
2005 SEQUOIA (RM1146U)

DI1OH±18
DI±1686
± DIAGNOSTICSBODY CONTROL SYSTEM
1880 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
DOOR LOCK CONTROL
SymptomSuspected AreaSee page
Lock or unlock cannot be operated with door lock control switch.
1. Door lock control switch (Power source circuit)
(Driver's)
(Passenger's)
2. Body ECU
DI±1788
DI±1826
IN±35
Door key linked function does not operate.
1. Door key lock and unlock switch circuit (Driver's)
(Passenger's)
2. Body ECUDI±1794
DI±1832
IN±35
Key confinement prevention function does not operate.1. Key unlock warning switch circuit
2. Body ECUDI±1715
IN±35
Door lock function does not operate.1. Door lock motor circuit
2. Body ECUDI±1720
IN±35
THEFT DETERRENT SYSTEM
SymptomSuspected AreaSee page
No alerting condition is operated. (The system cannot be set.)
1. Security indicator circuit
2. Key unlock warning switch circuit
3. Courtesy light switch circuit
4. Door unlock detection switch circuit (Driver's)
(Passenger's)
5. Engine hood courtesy light switch circuit
6. Back door courtesy light switch circuit
7. Back door ECU
8. Body ECUDI±1731
DI±1715
DI±1728
DI±1791
DI±1829
DI±1725
DI±1864
IN±35
IN±35
Cannot be canceled when IG is turned ON with a key.
1. Key unlock warning switch circuit
2. Ignition switch
3. Body ECUDI±1715
BE±24
IN±35
Cannot be canceled when unlocking the back door with a key.1. Back door ECU
2. Body ECUIN±35
IN±35
Headlights do not light up as an alert function.1. Headlight relay circuit
2. Body ECUDI±1708
IN±35
Taillights do not light up as an alert function.1. Taillight relay circuit
2. Body ECUDI±1706
IN±35
Theft deterrent horn or vehicle horn does not sound.
1. Security horn circuit
2. Horn circuit
3. Body ECUDI±1734
DI±1764
IN±35
During warning condition, cannot be canceled by unlocking the
door with a key.1. Door key lock and unlock switch circuit (Driver's)
(Passenger's)
2. Body ECUDI±1794
DI±1832
IN±35
During warning condition, cannot be canceled by unlocking the
door with a key. (transmitter)1. Transmitter
2. Body ECUBE±99
IN±35
During warning condition, cannot be canceled by turning the igni-
tion ON with a key.1. Ignition switch
2. Key unlock warning switch circuit
3. Body ECUBE±24
DI±1715
IN±35
The system operated for more than 60 seconds.Body ECUIN±35
Glass breakage sensor does not operate.1. Glass breakage sensor circuit
2. Body ECUDI±1774
IN±35

DI1OG±31
I27698
B5B6
B7 BODY CONTROL ECU:
DI±1688
± DIAGNOSTICSBODY CONTROL SYSTEM
1882 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
KSW ± GND1
(B5±13 ± B6±6)Y±G ± W±BKey unlock warning
switch signalKey unlock warning switch ON
(Key inserted)Below 1 V
KSW ± GND1
(B5±13 ± B6±6)Y±G ± W±BKey unlock warning
switch signalKey unlock warning switch OFF
(Key not inserted)10 to 14 V
KSW2 ± GND1
(B5±15 ± B6±6)Y±G ± W±B
Key unlock warning
switch signal (Immobi-
lizer)Key unlock warning switch ON
(Key inserted)Below 1 V
KSW2 ± GND1
(B5±15 ± B6±6)Y±G ± W±B
Key unlock warning
switch signal (Immobi-
lizer)Key unlock warning switch OFF
(Key not inserted)10 to 14 V
HR ± GND1
(B7±18 ± B6±6)W±R ± W±BHorn switch signalHorn switch ONBelow 1 V
HR ± GND1
(B7±18 ± B6±6)W±R ± W±BHorn switch signalHorn switch OFF10 to 14 V
BDN ± GND1
(B6±15 ± B6±6)P±L ± W±BBack door power win-
dow motor (DOWN)Back door power window switch
DOWN positionBelow 1 V
BDN ± GND1
(B6±15 ± B6±6)P±L ± W±BBack door power win-
dow motor (DOWN)Back door power window switch
OFF or UP position10 to 14 V
BUP ± GND1
(B6±14 ± B6±6)W ± W±BBack door power win-
dow motor (UP)Back door power window switch
UP positionBelow 1 V
BUP ± GND1
(B6±14 ± B6±6)W ± W±BBack door power win-
dow motor (UP)Back door power window switch
OFF or DOWN position10 to 14 V
ACC ± GND1
(B7±10 ± B6±6)GR ± W±BIgnition switch (ACC)Ignition switch OFFBelow 1 V
ACC ± GND1
(B7±10 ± B6±6)GR ± W±BIgnition switch (ACC)Ignition switch ACC or ON10 to 14 V
BECU ± GND1
(B6±5 ± B6±6)W±R ± W±BBatteryAlways10 to 14 V
RLCY ± GND1
(B7±7 ± B6±6)R±W ± W±BCourtesy light switch
(Rear LH)Rear LH door courtesy light
switch ON (Open)Below 1 V
RLCY ± GND1
(B7±7 ± B6±6)R±W ± W±BCourtesy light switch
(Rear LH)Rear LH door courtesy light
switch OFF (Closed)10 to 14 V
RRCY ± GND1
(B5±8 ± B6±6)R±W ± W±BCourtesy light switch
(Rear RH)Rear RH door courtesy light
switch ON (Open)Below 1 V
RRCY ± GND1
(B5±8 ± B6±6)R±W ± W±BCourtesy light switch
(Rear RH)Rear RH door courtesy light
switch OFF (Closed)10 to 14 V
PCTY ± GND1
(B5±22 ± B6±6)LG±B ± W±BCourtesy light switch
(Front RH)Passenger door courtesy light
switch ON (Open)Below 1 V

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1689
1883 Author: Date:
2005 SEQUOIA (RM1146U) PCTY ± GND1
(B5±22 ± B6±6)
LG±B ± W±BCourtesy light switch
(Front RH)Passenger door courtesy light
switch OFF (Closed)10 to 14 V
LSWL ± GND1
(B7±24 ± B6±6)P±L ± W±BDoor unlock detection
switch (Rear LH)Rear LH door unlock detection
switch ON (Unlocked)Below 1 V
LSWL ± GND1
(B7±24 ± B6±6)P±L ± W±BDoor unlock detection
switch (Rear LH)Rear LH door unlock detection
switch OFF (Locked)10 to 14 V
DCTY ± GND1
(B7±12 ± B6±6)GR±R ± W±BCourtesy light switch
(Front LH)Driver door courtesy light switch
ON (Open)Below 1 V
DCTY ± GND1
(B7±12 ± B6±6)GR±R ± W±BCourtesy light switch
(Front LH)Driver door courtesy light switch
OFF (Closed)10 to 14 V
LSWR ± GND1
(B5±21 ± B6±6)P±B ± W±BDoor unlock detection
switch (Rear RH)Rear RH door unlock detection
switch ON (Unlocked)Below 1 V
LSWR ± GND1
(B5±21 ± B6±6)P±B ± W±BDoor unlock detection
switch (Rear RH)Rear RH door unlock detection
switch OFF (Locked)10 to 14 V
HORN ± GND1
(B5±26 ± B6±6)B±Y ± W±BHorn switch signalHorn switch OFF10 to 14 V
HORN ± GND1
(B5±26 ± B6±6)B±Y ± W±BHorn switch signalHorn switch ONBelow 1 V
BDR ± GND1
(B6±2 ± B6±6)L±W ± W±BBatteryAlways10 to 14 V
GND1 ± Body ground
(B6±6 ± Body ground)W±B ± Body groundGroundAlwaysBelow 1 V
RWLS ± GND1
(B5±6 ± B6±6)Y±B ± W±BRear wiper switch sig-
nal (ON)Rear wiper switch ONBelow 1 V
RWLS ± GND1
(B5±6 ± B6±6)Y±B ± W±BRear wiper switch sig-
nal (ON)Rear wiper switch OFF or INT10 to 14 V
RWC1 ± GND1
(B5±7 ± B6±6)G±B ± W±BRear wiper switch sig-
nal (INT)Rear wiper switch INTBelow 1 V
RWC1 ± GND1
(B5±7 ± B6±6)G±B ± W±BRear wiper switch sig-
nal (INT)Rear wiper switch OFF10 to 14 V
ACTD ± GND1
(B7±2 ± B6±6)R±B ± W±BDoor lock motor (Front
LH)Power door lock not operating or
operating to UNLOCKBelow 1 V
ACTD ± GND1
(B7±2 ± B6±6)R±B ± W±BDoor lock motor (Front
LH)Power door lock not operating to
LOCK10 to 14 V
IND ± GND1
(B5±16 ± B6±6)GR ± W±BSecurity indicator lightSecurity indicator is offBelow 1 V
IND ± GND1
(B5±16 ± B6±6)GR ± W±BSecurity indicator lightSecurity indicator light is on10 to 14 V
SH ± GND1
(B7±1 ± B6±6)R±G ± W±BTheft deterrent horn
signalSecurity horn does not soundBelow 1 V
SH ± GND1
(B7±1 ± B6±6)R±G ± W±BTheft deterrent horn
signalSecurity horn sounds10 to 14 V
HRLY ± GND1
(B7±8 ± B6±6)LG±R ± W±BHEAD relay signalHEAD relay ONBelow 1 V
HRLY ± GND1
(B7±8 ± B6±6)LG±R ± W±BHEAD relay signalHEAD relay OFF10 to 14 V
TRLY ± GND1
(B7±11 ± B6±6)LG ± W±BTaillight relay signalTaillight relay ONBelow 1 V
TRLY ± GND1
(B7±11 ± B6±6)LG ± W±BTaillight relay signalTaillight relay OFF10 to 14 V

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1697
1891 Author: Date:
2005 SEQUOIA (RM1146U)DISP EX ON SEN
Display extinction luminous inten-
sity/NORMAL, DARK2, DARK1,
LIGHT1 or LIGHT2Customized condition will be dis-
played±
DISP EX OFF SEN
Display extinction release lumi-
nous intensity/NORMAL, DARK2,
DARK1, LIGHT1 or LIGHT2Customized condition will be dis-
played±
2. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relays, actuators and so on to operate
without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one of the methods
to shorten labor time.
It is possible to display the DATE LIST during the ACTIVE TEST.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on the tester, perform the ºACTIVE TESTº.
BODY ECU:
ItemTest DetailsDiagnostic Note
SECURITY INDICTurn security indicator light ON/OFF±
SECURITY HORNTurn theft horn ON/OFFThis test is available only for vehicles equipped
with security horn.
BUZZ CONT SOUNDWireless buzzer continuous sound ON/OFF±
BUZZ RESP SOUNDTurn wireless buzzer ON/OFFTurn volume to MAX if it is a wireless buzzer
equipped vehicle.
HEAD LIGHTHeadlight relay ON/OFF±
TAIL LIGHTTaillight ON/OFF±
ILLUMI OUTPUTIlluminated entry system ON/OFFIG is ON, E/G is stopped and light control SW is
OFF.
ALL COURTESYDOOR indicator light ON/OFF±
VEHICLE HORNTurn vehicle horn ON/OFF±
RL P/W UP/DOWNRear left passenger power window DOWN/UPCaution: This test causes vehicle parts to move.
Watch your hands and feet.
RR P/W UP/DOWNRear right passenger power window DOWN/UPCaution: This test causes vehicle parts to move.
Watch your hands and feet.
DOOR LOCKDoor lock LOCK/UNLOCKAll doors are closed.