horn TOYOTA SEQUOIA 2001 Service Owner's Manual

SR1KD±01
F17124
Screw CaseTorx® Screw
F17904
Correct
Wrong
Airbag Connectors
F06699
Matchmarks
SST
SR±14
± STEERINGTILT STEERING COLUMN
3241 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
Wait for 90 seconds after disconnecting the cable to prevent the
airbag working.
2. REMOVE STEERING WHEEL PAD
NOTICE:
If the airbag connector is disconnected with the ignition
switch in the ACC or ON position, DTCs will be recorded.
(a) Place the front wheels facing straight ahead.
(b) Remove the steering wheel lower No. 3 cover.
(c) Remove the steering wheel lower No. 2 cover.
(d) Using a torx® socket wrench (T30), loosen the 2 torx®
screws.
HINT:
Loosen each screw until the groove along the screw circumfer-
ence is caught on the screw case.
(e) Pull out the wheel pad from the steering wheel.
(f) Using a screwdriver, disconnect the airbag connectors.
CAUTION:

When storing the steering wheel pad, keep the upper
surface of the pad facing upward.

Never disassemble the steering wheel pad.
NOTICE:
When removing the steering wheel pad, take care not to
pull the airbag wire harness.
(g) Disconnect the horn terminal and remove the steering
wheel pad.
3. REMOVE STEERING WHEEL
(a) Remove the steering wheel set nut.
(b) Put matchmarks on the steering wheel and main shaft as-
sembly.
(c) Using SST, remove the wheel.
SST 09950±50013 (09951±05010, 09952±05010,
09953±05020, 09954±05021)
4. REMOVE UPPER AND LOWER COLUMN COVERS
Remove the 3 screws, upper and lower column covers.

F17129
Torx® Screw
Screw Case
± STEERINGTILT STEERING COLUMN
SR±25
3252 Author: Date:
2005 SEQUOIA (RM1146U)
15. INSTALL STEERING WHEEL
(a) Align the matchmark on the wheel with the one on the
main shaft.
(b) Install the wheel set nut.
Torque: 50 N´m (510 kgf´cm, 37 ft´lbf)
16. INSTALL STEERING WHEEL PAD
NOTICE:

Never use airbag parts from another vehicle. When
replacing parts, replace with new ones.

Make sure that the wheel pad is installed with the spe-
cified torque.

If the wheel pad has been dropped, or there are
cracks, dents or other defects on the case or connec-
tor, replace the wheel pad with a new one.

When installing the wheel pad, take care that the wir-
ings do not interfere with other parts and are not
pinched between other parts.
(a) Connect the horn terminal.
(b) Connect the airbag connectors.
(c) Install the wheel pad after confirming that the circumfer-
ence groove of the torx® screw is caught on the screw
case.
(d) Using a torx® socket wrench (T30), tighten the 2 torx®
screws.
Torque: 8.8 N´m (90 kgf´cm, 78 in.´lbf)
(e) Install the steering wheel lower No. 2 cover.
(f) Install the steering wheel lower No. 3 cover.
17. CHECK STEERING WHEEL CENTER POINT
18. CONNECT CABLE TO NEGATIVE BATTERY TERMI-
NAL
19. PERFORM INITIALIZATION (See page IN±20)
Some systems need initialization when disconnecting the cable
from the negative battery terminal.

H24695
RS117±01
H20642
H23201
Horn Button Contact Plate
H24696
RS±22
± SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
3305 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. VEHICLE NOT INVOLVED IN COLLISION
(a) Perform a diagnostic system check (see page DI±1147).
(b) With the steering wheel pad installed on the vehicle, per-
form a visual check. If there are any defects as mentioned
below, replace the steering wheel pad with a new one:
Cuts, minute cracks or marked discoloration on the steer-
ing wheel pad top surface or in the grooved portion.
2. VEHICLE INVOLVED IN A COLLISION AND AIRBAG IS
NOT DEPLOYED
(a) Perform a diagnostic system check (see page DI±1147).
(b) With the steering wheel pad removed from the vehicle,
perform a visual check. If there are any defects as men-
tioned below, replace the steering wheel pad or steering
wheel assembly with a new one:

Cuts, minute cracks or marked discoloration on the
steering wheel pad top surface or in the grooved
portion.

Cracks or other damage to the connectors.

Deformation of the steering wheel assembly.

Deformation of the horn button contact plate of the horn
button assembly.

There should be no interference between the steering
wheel pad and steering wheel assembly, and the clear-
ance should be uniform all the way around when a new
steering wheel pad is installed on the steering wheel as-
sembly.
CAUTION:
For removal and installation procedures of the steering
wheel pad, see page RS±21 and RS±31. Be sure to follow
the correct procedure.

BE±10
± BODY ELECTRICALTROUBLESHOOTING
3414 Author: Date:
2005 SEQUOIA (RM1146U) Some of the system does not operate.
(Taillight does not come on.)
1. TAIL Fuse
2. TAILLIGHT Relay
3. Light Control Switch
4. Wire Harness
5. Body ECUBE±14
BE±27
BE±27
±
±
Some of the system do not operate.
(Theft deterrent horn or vehicle horn does not sound.)
1. HORN Fuse
2. SECURITY HORN Fuse
3. HORN Relay Circuit
4. Theft Deterrent Horn Circuit
5. Horn
6. Body ECUBE±14
BE±14
BE±145
BE±92
BE±145
±
While the warning is given, the system cannot be canceled by
unlocking the door with a key or transmitter.
1. Door Key Lock and Unlock Switch Circuit (Driver Door
ECU)
Door Key Lock and Unlock Switch Circuit (Passenger
Door ECU)
Door Key Lock and Unlock Switch Circuit (Back Door
ECU)
2. Body ECUDI±1794
DI±1832
DI±1882
±
*1: w/ Glass breakage sensor
WIRELESS DOOR LOCK CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
HINT:
Troubleshooting of the wireless door lock control system is based on the premise that the door lock
control system operates normally. Accordingly, before troubleshooting the wireless door lock control
system, first make certain that the door lock control system operates normally.
If the trouble still reappears even though there are no abnormalities in any of the other circuits, check
and replace the Wireless Door Lock Control Receiver as the last step.
SymptomSuspect AreaSee page
All functions of wireless door lock control system do not operate.
1. Transmitter
2. Wireless Door Lock Control Receiver Circuit
3. Body ECUBE±98
DI±1737
±
Wireless door lock operates, but the buzzer does not sound.
(The buzzer does not sound when the customize function prohib-
its.)1. Wireless Door Lock Buzzer Circuit
2. Body ECUDI±1741
±
POWER SEAT CONTROL SYSTEM (w/o Driving Position Memory)
SymptomSuspect AreaSee page
Both Driver and Passenger Power seats do not operate.1. PWR SEAT Fuse
2. Wire HarnessBE±14
±
Driver's seat does not operate.1. Power Seat Switch (D)
2. Wire HarnessBE±109
±
Passenger's seat does not operate.1. Power Seat Switch (P)
2. Wire HarnessBE±109
±
ºSlide operationº does not operate.
1. Power Seat Switch (D, P)
2. Slide Motor (D, P)
3. Wire HarnessBE±109
BE±109
±
ºFront Vertical Operationº does not operate.
1. Power Seat Switch (D)
2. Front Vertical Motor (D)
3. Wire HarnessBE±109
BE±109
±
ºLifter Operationº does not operate.
1. Power Seat Switch (D)
2. Lifter Motor (D)
3. Wire HarnessBE±109
BE±109
±

BE±12
± BODY ELECTRICALTROUBLESHOOTING
3416 Author: Date:
2005 SEQUOIA (RM1146U)
NAVIGATION SYSTEM
SymptomSuspect AreaSee page
Navigation system abnormal operation.See DIAGNOSIS SYSTEMDI±2172
REAR SEAT ENTERTAINMENT SYSTEM
SymptomSuspect AreaSee page
Rear seat entertainment system abnormal operation.See DIAGNOSIS SYSTEMDI±2083
REAR SEAT AUDIO SYSTEM
SymptomSuspect AreaSee page
Rear seat audio system abnormal operation.See DIAGNOSIS SYSTEMDI±2048
CLOCK SYSTEM
SymptomSuspect AreaSee page
Clock does not operate.TROUBLESHOOTING NO.1BE±127
Clock loses or gains time.TROUBLESHOOTING NO.2BE±127
GARAGE DOOR OPENER SYSTEM
SymptomSuspect AreaSee page
The equipment of which code has been registered does not oper-
ate.1. Garage Door Opener Switch
2. Wire Harness
3. *BE±134
±
±
LED does not come on. (Even though either switch is pressed.)1. Garage Door Opener Switch
2. Wire HarnessBE±134
±
LED does not come on. (Only one switch is pressed.)Garage Door Opener SwitchBE±134
* As the GARAGE DOOR OPENER on the vehicle side seems to be normal, check the OPENER on the
equipment side, of which code has been registered.
ENGINE IMMOBILISER SYSTEM
SymptomSuspect AreaSee page
Engine immobilizer system does not operate.See DIAGNOSIS SYSTEMBE±143
HORN SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Horn system does not operate.
1. HORN Fuse
2. HORN Relay Circuit
3. Horn Switch Circuit
4. Horn
5. Body ECUBE±14
BE±145
BE±145
BE±145
±
Horn blow all the time.
1. HORN Relay Circuit
2. Horn Switch Circuit
3. Body ECUBE±145
BE±145
±
One horn operates but the other horn does not operate.1. Horn
2. Wire HarnessBE±145
±

I28399
Fusible Link Block:
Relays: Fuses:
5. RR HEATER Fuse 30 A
A. C/OPN Relay
B. HEAD Relay
C. EFI Relay
D. FUEL PUMP Relay
E. DEFOG Relay
F. HORN Relay
Engine Room J/B6. R/B Fuse 30 A
7. A/PUMP Fuse 50 A
8. ABS Fuse 60 A
9. ALT Fuse 140 A
10. CDS FAN Fuse 25 A
11. Spare Fuse 15 A
12. Spare Fuse 20 A
13. Spare Fuse 30 A
14. Main Fuse 40 A
15. DOOR No. 2 Fuse 30 A
16. *2 H±LP RH Fuse 15 A
17. EFI No. 1 Fuse 20 A
18. ETCS Fuse 10 A19. *1.DRL Fuse 15 A
*2.H±LP LH Fuse 15 A
20. ALT±S Fuse 7.5 A
21. TOWING Fuse 30 A
22. ST Fuse 30 A
23. RAD No. 3 Fuse 30 A
24. TURN±HAZ Fuse 20 A
25. AM2 Fuse 25 A
26. EFI No. 2 Fuse 10 A
27. SHORT±PIN
28. HORN Fuse 10 A
29. MIR HTR Fuse 15 A
30. ECU±B Fuse 7.5 A
31. DOME Fuse 10 A
32. RAD No. 1 Fuse 20 A
*1 w/ Daytime Running Light
*2 w/o Daytime Running Light 15
16 17 18
19 20 21
262728
2930
A
B
C
D
EF 1
234
5
6789
10
22 2324 25
31
32
11
12
13141. TOWING R/B Fuse 50 A
2. AIR SUS Fuse 50 A
3. HEATER Fuse 50 A
4. DEFOG Fuse 40 A
± BODY ELECTRICALPOWER SOURCE
BE±17
3421 Author: Date:
2005 SEQUOIA (RM1146U)

BE2ML±01
BE±82
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
3486 Author: Date:
2005 SEQUOIA (RM1146U)
THEFT DETERRENT SYSTEM
ON±VEHICLE INSPECTION
1. OUTLINE OF THEFT DETERRENT SYSTEM
When the theft deterrent system detects any theft, it informs
people around by flashing lights and sound.
All initial settings are performed in active mode. It can be
switched to passive mode by using the hand±held tester. (See
step 3. CHANGING METHOD OF PASSIVE MODE.)
HINT:
There are 4 conditions in this system: disarmed state, arming
preparation, armed state and alarm sounding.
(1) Disarmed state
Alarm function does not operate.
Theft deterrent function is not performed.
(2) Arming preparation
Time until transferring to armed state.
Theft deterrent function is not performed.
(3) Armed state
Theft deterrent function is ready.
(4) Alarm sounding:
When the system detects a theft, it informs people
around the vehicle using light and sound.
Refer to the table below for alarming method or
time.
Horn
Security horn
Alarm methodHeadlightAlarm method
Taillight
Interior light
Alarm time60 seconds
Alarm outputContinuous 0.4 secs. (ON)
0.4 secs. (OFF)
HINT:
Alarm output for the hazard is the same as the one for the haz-
ard on the vehicle.
If any of the doors is unlocked not by the key or wireless remote
control in the armed state, a force lock signal will be output.

Disarmed state
Perform any of the following and the system will go on to ºArming preparationº:

With all the doors, the engine hood and the back door closed, lock all doors with the key.

With all the doors, the engine hood and the back door closed, lock all doors by the
wireless remote control.

With all the doors, engine hood and back door locked, open and close any of the doors, the
engine hood or the back door, then close and lock all doors, the engine hood and the back door.
Arming preparation
Perform the following and the system will
go on to ºArmed stateº:

Let 30 seconds elapse with all the doors,
engine hood and the back door closed and
locked.
Perform any of the following and the system
will return to ºDisarmed stateº:

Open any of the doors, the engine hood or
the back door .

Unlock any of the doors or the back door.

Put the key in the key cylinder.

Reconnect the battery.
Armed state
Perform any of the following and the system
will return to ºDisarmed stateº:

Unlock any of the doors or the back door by
the wireless remote control.

Unlock any of the doors or the back door with
the key.

Put the key in the key cylinder and turn it ON.
Perform any of the following and the system
will go on to ºAlarm soundingº:

Open any of the doors or the back door.

Unlock any of the doors or the back door in
any way other than with a key or by the wireless
remote control.

Open the engine hood.

Reconnect the battery.

When input from the optional glass break sensor
is detected (Dealer option).(Key not inserted in key cylinder.)
Alarm sounding
The vehicle's horn and security horn will sound,
and the hazard, interior, tail and head lights come
on for 60 seconds.
After the alarm has stopped, the system will
return to ºArmed stateº. Perform any of the following and the system
will return to ºDisarmed stateº:

Unlock any of the doors and the back door by
the wireless remote control.

Unlock any of the doors or the back door with
the key.

Put the key in the key cylinder and turn it ON.
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
BE±83
3487 Author: Date:
2005 SEQUOIA (RM1146U)
2. ACTIVE ARMING MODE

BE0CE±10
I28416
Theft Deterrent Horn
Engine Hood Courtesy Switch Engine Room J/B
Door Lock Assembly

Door Lock Motor

Door Unlock Detection Switch
Ignition Switch

Key Unlock Warning Switch
Instrument Panel J/B
Door Courtesy Light Switch
Horn
Back Door Lock Motor
Door Key Lock
and Unlock
Switch
Door Key Lock and
Unlock Switch Headlight
Doom Light
Taillight
Body ECU
(Located behind the Instrument Panel)
Engine Room R/B No. 2
Glass Breakage Sensor ECU
Glass Breakage
Sensor Microphone
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
BE±91
3495 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

I04146
BE1W8±05
I04148
ON OFF BE±92
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
3496 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. INSPECT THEFT DETERRENT HORN OPERATION
Connect the positive (+) lead from the battery to terminal 1 and
negative (±) lead to the theft deterrent horn body, and check
that the theft deterrent horn blows.
If operation is not as specified, replace the horn.
2. INSPECT ENGINE HOOD COURTESY SWITCH CON-
TINUITY
Switch positionTester connectionSpecified condition
CLOSE (OFF)±No continuity
OPEN (ON)1 ± 2Continuity
If continuity is not as specified, replace the switch.
3. INSPECT ENGINE HOOD COURTESY SWITCH CIR-
CUIT (See page DI±1725)