child restraint TOYOTA SEQUOIA 2001 Service Repair Manual

IN04Q±33
IN±40
± INTRODUCTIONTERMS
40 Author: Date:
2005 SEQUOIA (RM1146U)
TERMS
ABBREVIATIONS USED IN THIS MANUAL
AbbreviationsMeaning
ABSAnti±Lock Brake System
A/CAir Conditioner
ACAlternating Current
ACCAccessory
ACISAcoustic Control Induction System
ACMActive Control Engine Mount
ACSDAutomatic Cold Start Device
A.D.D.Automatic Disconnecting Differential
A/FAir±Fuel Ratio
AHCActive Height Control Suspension
ALRAutomatic Locking Retractor
ALTAlternator
AMPAmplifier
ANTAntenna
APPROX.Approximately
ASSYAssembly
A/T, ATMAutomatic Transmission (Transaxle)
AT FAutomatic Transmission Fluid
AUTOAutomatic
AUXAuxiliary
AV GAverage
AV SAdaptive Variable Suspension
B+Battery Voltage
BABrake Assist
BACSBoost Altitude Compensation System
BATBattery
BDCBottom Dead Center
B/LBi±Level
B/SBore±Stroke Ratio
BTDCBefore Top Dead Center
BVSVBimetallic Vacuum Switching Valve
CBCircuit Breaker
CCoCatalytic Converter For Oxidation
CCVCanister Closed Valve
CDCompact Disc
CFCornering Force
CGCenter Of Gravity
CHChannel
CKDComplete Knock Down
COMB.Combination
CPECoupe
CPSCombustion Pressure Sensor
CPUCentral Processing Unit
CRSChild Restraint System
CTRCenter
C/VCheck Valve
CVControl Valve
CWCurb Weight

H23981
Occupant
Classification Sensor
Occupant
Classification ECU
Occupant Load
A
A ± A Cross Section
Occupant
Classification Sensor
Occupant
Classification Sensor
A
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1125
1319 Author: Date:
2005 SEQUOIA (RM1146U)
3. DESCRIPTION OF OCCUPANT CLASSIFICATION SYSTEM
(a) GENERAL DESCRIPTION.
(1) In the occupant classification system, the occupant classification ECU calculates the weight of
the occupant based on a signal from the occupant classification sensor. This system recognizes
the occupant to be a child if it detects a weight of less than 36 kg (79.37 lb), and disables the
front and side airbags.
(2) This system is mainly comprised of 4 occupant classification sensors that detect the load on the
front passenger seat. The occupant classification ECU controls the system, and the passenger
airbag ON/OFF indicator indicates the ON/OFF condition of the front passenger airbag assembly
and side airbag assembly (passenger side).
(b) OCCUPANT CLASSIFICATION SENSOR.
The occupant classification sensors are installed on 4 brackets connecting the seat rail and seat frame.
Accordingly, when load is applied to the passenger seat by an occupant sitting in it, the occupant classi-
fication sensors register a distortion.

DI±1140
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1334 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Review.
(1) When the SRS airbag system is normal:
The SRS warning light comes on only during the primary check period (for approximately 6 se-
conds after the ignition switch is turned to the ON position).
(2) When the SRS airbag system has trouble:

The SRS warning light remains on even after the primary check period has elapsed.

The SRS warning light goes off after the primary check, but comes on again during the
constant check.

The SRS warning light does not come on when turning the ignition switch from the LOCK
to ON position.
HINT:
The airbag sensor assembly keeps the SRS warning light on if the airbag has been deployed.
4. FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR
The passenger airbag ON/OFF indicator function as follows:
(1) Turn the ignition switch to the ON position.
(2) The passenger airbag ON/OFF indicator (ºONº and ºOFFº) comes on for approximately 4 se-
conds, then goes off for approximately 2 seconds.
(3) Approximately 6 seconds after the ignition switch is turned to the ON position, the passenger
airbag ON/OFF indicator will be ON/OFF depending on the conditions listed below.
HINT:
If the front passenger seat condition and the indication by the passenger airbag ON/OFF indicator differ from
those shown in the table below, and the SRS warning light is off, then the DTC is not output. If this occurs,
perform troubleshooting of ºTrouble in indication of Passenger airbag ON/OFF indicatorº (see page
DI±1485).
ConditionºONº indicatorºOFFº indicator
VacantOFFOFF
Adult is seated.ONOFF
Child is seated.OFFON
Child restraint system (CRS) is set.OFFON
Occupant classification system failureOFFON

DIDGP±01
DI±1152
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1346 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
HINT:
By accessing the DATA LIST displayed by the hand±held tester, you can perform such functions as reading
the values of the switches and sensors without removing any parts. Reading the DATA LIST is the first step
of troubleshooting and is one method to shorten labor time.
1. DATA LIST FOR AIRBAG SENSOR ASSEMBLY
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Following the display on the tester screen, read the ºDATA LISTº.
ItemMeasurement tem/
Range (Display)Normal ConditionDiagnostic Note
D SEAT POSITION
Seat position (Driver side)/
FORWARD: Seat position
is forward
BKWARD: Seat position is
rearward
FAIL: A failure is detected
FORWARD/BKWARD±
PASSENGER CLASS
Passenger classification/
NG: Data is not deter-
mined
NONE: Vacant
CHILD: Child (less than 36
kg (79.37 lb)) is seated
SMALL: Adult (36 to 54 kg
(79.37 to 119.05 lb)) is
seated
REGULAR: Adult (more
than 54 kg (119.05 lb)) is
seated
FAIL: A failure is detected
NG/NONE/CHILD/SMALL/
REGULAR±
D BUCKLE SW
Buckle switch (Driver side)/
UNSET: The seat belt is
not fastened
SET: The seat belt is fas-
tened
NG: Data is not deter-
mined
UNSET/SET±
P BUCKLE SW
Buckle switch (Passenger
side)/
UNSET: The seat belt is
not fastened
SET: The seat belt is fas-
tened
NG: Data is not deter-
mined
UNSET/SET±
DISPLAY TYPE
Display type identification
information/
LR: The display is indi-
cated by LH/RH
DP: The display is indi-
cated by Driver/Passenger
LR/DPFor this vehicle, the display
is displayed by LH/RH.

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1153
1347 Author: Date:
2005 SEQUOIA (RM1146U)
2. DATA LIST FOR OCCUPANT CLASSIFICATION ECU
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Following the display on the tester screen, read the ºDATA LISTº.
ItemMeasurement Item/
Range (Display)Normal ConditionDiagnostic Note
IG SW
Ignition switch condition/
ON: Ignition switch ON
OFF: Ignition switch OFF
ON/OFF±
P BUCKLE SW
Buckle switch (Passenger
side)/
OFF: Unfasten the pas-
senger side seat belt
ON: Fasten the passenger
side seat belt
NG: Passenger side seat
belt has a trouble
OFF/ON±
PASSENGER CLASS
Passenger classification/
AF05: Adult (36 to 54 kg
(79.37 to 119.05 lb)) is
seated
AM50: Adult (more than 54
kg (119.05 lb)) is seated
CHILD: Child (less than 36
kg (79.37 lb) is seated
CRS: Child restraint sys-
tem (less than 7 kg (15.43
lb)) and passenger side
buckle switch is ON, then
7 to 36 kg (15.43 to 79.37
lb)) is set
OFF: Vacant
AF05/AM50/CHILD/CRS/
OFF±
SENS RANGE INF
Sensor range information/
OK: The value of a sensor
is within the range
NG: The value of a sensor
is over the range
OK±
FL SENS RANGE
Front left sensor range in-
formation/
OK: Sensor range is ±17
to 27 kg (±37.48 to 59.52
lb)
Min.: Less than ±17 kg
(±37.48 lb)
Max.: More than 27 kg
(59.52 lb)
OK±
FR SENS RANGE
Front right sensor range in-
formation/
OK: Sensor range is ±17
to 27 kg (±37.48 to 59.52
lb)
Min.: Less than ±17 kg
(±37.48 lb)
Max.: More than 27 kg
(59.52 lb)
OK±

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1485
1679 Author: Date:
2005 SEQUOIA (RM1146U)
Trouble in Indicator of Passenger Airbag ON/OFF Indicator
CIRCUIT DESCRIPTION
The occupant classification system detects the front passenger seat condition. It then informs a passenger
of the front passenger airbag assembly condition (activated/not activated) by the passenger airbag ON/OFF
indicator.
The table below shows the normal indication condition of the passenger airbag ON/OFF indicator and the
front passenger seat condition.
Front passenger seat conditionON IndicatorOFF Indicator
Adult is seated.ONOFF
Child is seated.OFFON
VacantOFFOFF
Occupant classification system failureOFFON
INSPECTION PROCEDURE
1 Check SRS warning light.
CHECK:
Turn the ignition switch to the ON position, and check the SRS warning light condition.
HINT:
If this trouble occurs, the SRS warning light is off. If it is on, a DTC is output. Troubleshoot for the output DTC.
OK:
The SRS warning light does not come on.
NG Check DTC (see page DI±1147).
OK
DIDHT±01

DI±1486
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1680 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check passenger airbag ON/OFF indicator condition.
PREPARATION:
Turn the ignition switch to the ON position.
CHECK:
Check if the passenger airbag ON/OFF indicator correctly indicates the front passenger seat condition.
OK:
Front passenger seat conditionON IndicatorOFF Indicator
Adult is seated.ONOFF
Child is seated.OFFON
VacantOFFOFF
Occupant classification system failureOFFON
NG Go to step 3.
OK
END

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2005 SEQUOIA from Aug. '04 Prod. (OM34424U)
Important information about your Toyota
Occupant restraint systems
Toyota encourages you and your family to take the time to
read Section 1±3 of this Owner 's Manual carefully. In
terms of helping you understand how you can receive the
maximum benefit of the occupant restraint systems this
vehicle provides, Section 1±3 of this Owner 's Manual is
the most important Section for you and your family to
read.
Section 1±3 describes the function and operation concern-
ing seats, seat belts, SRS airbags and child restraint sys-
tems of this vehicle and some potential hazards you
should be aware of. These systems work together along
with the overall structure of this vehicle in order to provide
occupant restraint in the event of a crash. The effect of
each system is enhanced when it is used properly and
together with other systems. No single occupant restraint
system can, by itself, provide you or your family with the
equal level of restraint which these systems can provide
when used together. That is why it is important for you and
your family to understand the purpose and proper use of
each of these systems and how they relate to each other.
The purpose of all occupant restraint systems is to help
reduce the possibility of death or serious injury in the
event of a collision. None of these systems, either individ-
ually or together, can ensure that there is no injury in the
event of collision. However, the more you know about
these systems and how to use them properly, the greater
your chances become of surviving an accident without
death or serious injury.
Seat belts provide the primary restraint to all occupants of
the vehicle, and every occupant of the vehicle should wear
seat belts properly at all times. Children should always be
secured in child restraint systems that are appropriate for
their age and size. SRS (Supplemental Restraint System)
airbags are, as their names imply, designed to work with,
and be supplemental to, seat belts and are not substitutes
for them. SRS airbags can be very effective in reducing
the risk of head and chest injuries by preventing contact of
the head and chest with interior portions of the vehicle.

05_SEQUOIA_U (L/O 0408)
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2005 SEQUOIA from Aug. '04 Prod. (OM34424U)
OPERATION OF INSTRUMENTS AND
CONTROLS
Occupant restraint systems
Seats44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front seats44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear seats48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head restraints66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Armrests69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat heaters70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving position memory system71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat belts72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS driver airbag and front passenger airbag86 . . . . . . . . . . . . . . . . . . .
SRS side airbags and curtain shield airbags93 . . . . . . . . . . . . . . . . . . . .
Front passenger occupant classification system102 . . . . . . . . . . . . . . .
Roll sensing of curtain shield airbags off switch106 . . . . . . . . . . . . . . . .
Child restraint107 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1± 3

05_SEQUOIA_U (L/O 0408)
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2005 SEQUOIA from Aug. '04 Prod. (OM34424U)
RECALLING THE MEMORIZED POSITION
When you push button ª1º or ª2º, a
beep will sound and the driving posi-
tion will be automatically adjusted to
the position recorded for that button.
The memorized position can be recalled
under the following conditions:

The ignition key is in the ªON position
and the shift lever is in the ªPº posi-
tion.

The key is not in the ignition switch
and less than 30 seconds have passed
since opening the driver 's door.To stop the operation, push any driving
position memory button.
To reactivate the system, push the button
ª1º or ª2º again.
If the vehicle's battery is disconnected,
the memory will be erased and the posi-
tions will have to be set again.
CAUTION

Do not start the vehicle while the
adjustment are being made.

Take care not to select the wrong
button, or the seat could strike the
rear passenger or hit your body
against the steering wheel. If this
happens, you can stop the move-
ment by pressing another driving
position memory switch, or de-
pressing the brake pedal.
Toyota strongly urges that the driver and
passengers in the vehicle be properly re-
strained at all times with the seat belts
provided. Failure to do so could increase
the chance of injury and/or the severity of
injury in accidents.
The seat belts provided for your vehicle
are designed for people of adult size,
large enough to properly wear them.
Child. Use a child restraint system ap-
propriate for the child until the child be-
comes large enough to properly wear the
vehicle's seat belts. See ªChild restraintº
on page 107 in this Section for details.
If a child is too large for a child restraint
system, the child should sit in the rear
seat and must be restrained using the
vehicle's seat belt. According to accident
statistics, the child is safer when properly
restrained in the rear seat than in the
front seat.
If a child must sit in the front seat, the
seat belts should be worn properly. If an
accident occurs and the seat belts are not
worn properly, the force of the rapid infla-
tion of the airbag may cause death or
serious injury to the child.
Seat beltsÐ
ÐSeat belt precautions