belt TOYOTA SEQUOIA 2001 Service Owner's Manual

DIDGI±01
H23977
Front Airbag Sensor LH
Side Airbag Sensor
Assembly LH (*1)
Curtain Shield Airbag
Sensor Assembly LH (*1)
Front Seat Inner Belt
LH/Seat Position Airbag
Sensor Assembly
RSCA OFF Switch (*1)
Front Seat Inner Belt RH
Occupant Classification
Sensors (Front LH, Front
RH, Rear LH, Rear RH)Steering Wheel Pad (D Squib)
Front Passenger Airbag Assembly (P Squib)
Side Airbag Assembly LH
(Side Squib LH) (*1)
Curtain Shield Airbag Assembly LH
(Curtain Shield Airbag LH Squib) (*1)
Front Seat Outer Belt LH (P/T Squib LH)
Combination Meter
(SRS Warning Light/RSCA OFF Indicator (*1))
Integration Control and Panel
(Passenger Airbag ON/OFF Indicator)
ECM
DLC3 Airbag
Sensor
Assembly
Occupant
Classification
ECU Front Airbag Sensor RH
Side Airbag Sensor
Assembly RH (*1)
Curtain Shield Airbag
Sensor Assembly RH (*1)Side Airbag Assembly RH
(Side Squib RH) (*1)
Curtain Shield Airbag Assembly RH
(Curtain Shield Airbag RH Squib) (*1)
Front Seat Outer Belt RH (P/T Squib RH)
*1: w/ Side and Curtain Shield Airbag DI±1120
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1314 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DIDGJ±02
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1121
1315 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. DESCRIPTION OF SUPPLEMENTAL RESTRAINT SYSTEM
(a) General description.
In this system, the airbag sensor assembly installed on the floor under the A/C unit determines whether
or not to activate the SRS airbags (driver airbag, passenger airbag, front seat airbags and curtain
shield airbags) and seat belt pretensioners by receiving the collision signal from each sensor (exclud-
ing the airbag sensor assembly). When there is trouble in the system, the airbag sensor assembly turns
on the SRS warning light on the combination meter to inform the driver.
(b) Description of the dual stage control.
The airbag sensor assembly controls the dual stage deployment of the driver airbag in the steering
wheel pad and the passenger airbag on the instrument panel. The airbag sensor assembly controls
the dual stage deployment of the driver airbag according to the collision impact, seat position and seat
belt ON/OFF state. It also controls the dual stage deployment of the passenger airbag according to
the collision impact and seat belt ON/OFF state.
(c) Description of the roll±over function.
(1) The airbag sensor assembly detects inclination signals from the inclination sensor installed on
the vehicle. The roll±over function ensures passenger safety by using these signals to activate
the RH and LH curtain shield airbag assembly and seat belt pretensioner when vehicle inclination
exceeds the specified value.
(2) An RSCA OFF switch (roll±over sensing curtain shield airbag OFF switch), which allows optional
deactivation of the roll±over function, is installed on the vehicle.
(d) Description of check mode (signal check).
This airbag sensor assembly is operable using the check mode of the hand±held tester function. Check
mode can detect and output DTC by using a hand±held tester to switch the airbag sensor assembly
to the check mode.
A simulation method is used, if the malfunction cannot be reproduced during troubleshooting (the mal-
function is temporarily solved, etc.). In this case, joggling each connector, or driving on a city or rough
road with the airbag sensor assembly in check mode makes it possible to obtain a more accurate mal-
function condition.

H24635
Rollover Detection:
Side Collision and Rollover Detection:(a)
(b)
Airbag Sensor Assembly
Roll Rate Sensor 1
Roll Rate Sensor 2
Lateral Deceleration Sensor
Curtain Shield Airbag
Assembly (LH and RH)
Seat Belt Pretensioner
(LH and RH)
(c) (b)
Airbag Sensor Assembly
Roll Rate Sensor 1
Roll Rate Sensor 2
Lateral Deceleration Sensor
Curtain Shield Airbag
Sensor Assembly
Side Airbag Sensor
Assembly (
)Curtain Shield Airbag
Assembly (LH and RH)
Seat Belt Pretensioner
(LH and RH)Side Airbag of Collision
Side (
)
Activate depending on the
condition of the collision.
: DI±1124
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1318 Author: Date:
2005 SEQUOIA (RM1146U)
(d) w/ Side and curtain shield airbag:
Roll sensing of curtain shield airbag control.
(1) The airbag sensor assembly contains a roll rate sensor and roll rate sensor (that determine the
inclination angle the vehicle) and a lateral deceleration sensor (that determine the lateral force
that is applied to the vehicle). These sensors detect the vehicle's roll angle, rotational speed, and
lateral acceleration speed.
(2) Based on the information obtained from sensors, the airbag sensor assembly makes an overall
judgment of the vehicle's roll angle rotational speed, and lateral acceleration speed. If the airbag
sensor determines that the vehicle has rolled over due to cause other than the side collision, it
deploys the right and left curtain shield airbags and the front right and left seat belt pretensioners.
(3) This system provides a roll sensing of curtain shield airbags cutoff switch (RSCA OFF switch)
on the driver side of the instrument panel with which the driver can stop the operation of the func-
tion.
(4) By operating the RSCA OFF switch and while the roll sensing of the curtain shield airbag control
is OFF, and when the airbag sensor assembly judges to operate the side and curtain shield air-
bag system in the event of side collision, it is no need prohibit this operation.

DIDGL±01
H24009
A19A20A21
17
24 18
23 19
22 20
21 4 8372615
12 13 11 14 10
15 9
16
28 27 26 25 30 294 8372615 4 8372615
10 9 12 13 11 14 15 16 10 9 12 13 11 14 15 16
17 18 19 20 24 23 22 21 17 18 19 20 24 23 22 21
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1133
1327 Author: Date:
2005 SEQUOIA (RM1146U)
TERMINALS OF ECU
1. AIRBAG SENSOR ASSEMBLY
Terminal No.Terminal SymbolDestination
A19±1 (*1)SFL+Side airbag assembly LH (Side squib LH)
A19±2 (*1)SFL±Side airbag assembly LH (Side squib LH)
A19±3 (*1)ICL±Curtain shield airbag assembly LH (Curtain shield airbag LH
squib)
A19±4 (*1)ICL+Curtain shield airbag assembly LH (Curtain shield airbag LH
squib)
A19±5PL+Front seat outer belt LH (P/T squib LH)
A19±6PL±Front seat outer belt LH (P/T squib LH)
A19±9LSP+Seat position airbag sensor assembly
A19±10LBE+Front seat inner belt RH (Seat belt buckle switch LH)
A19±17LSP±Seat position airbag sensor assembly
A19±18LBE±Front seat inner belt RH (Seat belt buckle switch LH)
A19±19 (*1)VUPLSide airbag sensor assembly LH
A19±20 (*1)VUCLCurtain shield airbag sensor assembly LH
A19±21 (*1)ESLSide airbag sensor assembly LH
A19±22 (*1)ESCLCurtain shield airbag sensor assembly LH
A20±1P2+Front passenger airbag assembly (P squib (Dual stage ± 2nd
step))
A20±2P2±Front passenger airbag assembly (P squib (Dual stage ± 2nd
step))
A20±3P±Front passenger airbag assembly (P squib)
A20±4P+Front passenger airbag assembly (P squib)
A20±5D+Steering wheel pad (D squib)
A20±6D±Steering wheel pad (D squib)
A20±7D2±Steering wheel pad (D squib (Dual stage ± 2nd step))
A20±8D2+Steering wheel pad (D squib (Dual stage ± 2nd step))
A20±13PBEWIntegration control and panel (Seat belt warning light)
A20±14LACombination meter (SRS warning light)
A20±15TCDLC3

DI±1134
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1328 Author: Date:
2005 SEQUOIA (RM1146U)A20±16
SILDLC3
A20±17P±ABIntegration control and panel (Passenger airbag ON/OFF indi-
cator)
A20±18GSWBody ECU
A20±19 (*1)RMSWRSCA cutoff switch
A20±20 (*1)RMILCombination meter (RSCA OFF indicator)
A20±21IG2IGN1 Fuse (Power source)
A20±22GSW2ECM
A20±23PAONIntegration control and panel (Passenger airbag ON/OFF indi-
cator)
A20±25E1Ground
A20±26E2Ground
A20±27±SRFront airbag sensor RH
A20±28±SLFront airbag sensor LH
A20±29+SRFront airbag sensor RH
A20±30+SLFront airbag sensor LH
A21±3PR±Front seat outer belt RH (P/T squib RH)
A21±4PR+Front seat outer belt RH (P/T squib RH)
A21±5 (*1)ICR+Curtain shield airbag assembly RH (Curtain shield airbag RH
squib)
A21±6 (*1)ICR±Curtain shield airbag assembly RH (Curtain shield airbag RH
squib)
A21±7 (*1)SFR±Side airbag assembly RH (Side squib RH)
A21±8 (*1)SFR+Side airbag assembly RH (Side squib RH)
A21±16FSR+Occupant classification ECU
A21±19 (*1)ESCRCurtain shield airbag sensor assembly RH
A21±20 (*1)ESRSide airbag sensor assembly RH
A21±21 (*1)VUCRCurtain shield airbag sensor assembly RH
A21±22 (*1)VUPRSide airbag sensor assembly RH
A21±24FSR±Occupant classification ECU
*1: w/ Side and curtain shield airbag

H23984
6 seconds
Ignition Switch
SRS Warning
Light (*1)
SRS Warning
Light (*2)
*1: SRS airbag system is normal
*2: SRS airbag system has trouble ON
OFF
ON
OFF
ON
OFF
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1139
1333 Author: Date:
2005 SEQUOIA (RM1146U)
3. FUNCTION OF SRS WARNING LIGHT
(a) Primary check.
Turn the ignition switch to the LOCK position. Wait for at least 2 seconds, then turn the ignition switch
to the ON position. The SRS warning light comes on for approximately 6 seconds and the SRS airbag
system diagnosis (including the seat belt pretensioner and occupant classification system) is per-
formed.
HINT:
If trouble is detected during the primary check, the SRS warning light remains on even after the primary
check period (for approximately 6 seconds) has elapsed.
(b) Constant check.
After the primary check, the airbag sensor assembly constantly monitors the SRS airbag system for
trouble.
HINT:
If trouble is detected during the constant check, the airbag sensor assembly functions as follows:

The SRS warning light comes on.

The SRS warning light goes off, and then comes on. This blinking pattern indicates the source voltage
drop. The SRS warning light goes off 10 seconds after the source voltage returns to normal.

H24029
Curtain Shield Airbag
Sensor Assembly RH
(*1)
Side Airbag Sensor
Assembly RH (*1)
Front Airbag
Sensor RH
RSCA OFF Switch
(*1)
Airbag Sensor
Assembly
Front Airbag
Sensor LH
Side Airbag Sensor
Assembly LH (*1)
Curtain Shield AIrbag
Sensor Assembly LH
(*1)Spiral CableTo
Occupant
Classification ECU
Front Seat Outer
Belt RH
(P/T Squib RH)
Side Airbag
Assembly RH
(Side Squib RH) (*1)
Front Passenger
Airbag Assembly
(P Squib)
Integration Control
and Panel
(Passenger Airbag
ON/OFF Indicator)
Combination Meter
(SRS Warning Light/
RSCA OFF Indicator
(*1))
Steering Wheel
Pad (D Squib)
Side Airbag
Assembly LH
(Side Squib LH) (*1)
Curtain Shield Airbag
Assembly LH (Curtain
Shield Airbag LH
Squib) (*1)
Front Seat Outer
Belt LH
(P/T Squib LH)
Seat Position AIrbag
Sensor Assembly/
Front Seat Inner Belt LH
(Buckle Switch LH)Curtain Shield Airbag
Assembly RH
(Curtain Shield Airbag
RH Squib) (*1)
9 13
10 14
11
1512
16 15
2 6
37
4 8
25 29
26 30
27 33
28 34
1721
1822
19 23
2024
3
4
7
89
10
13
14 11
1227
28
29
30 31
32
31
32 DI±1144
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1338 Author: Date:
2005 SEQUOIA (RM1146U)

H23825
Occupant
Classification ECUFront Seat Inner
Belt RH
(Buckle Switch RH)
Occupant
Classification
Sensor Front LH
Occupant
Classification
Sensor Front RH
Occupant
Classification
Sensor Rear LH
Occupant
Classification
Sensor Rear RH 35
36
37
3839
40
41
42
40
41
40
41
40
41 From
Airbag Sensor Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1145
1339 Author: Date:
2005 SEQUOIA (RM1146U)

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±