TOYOTA LAND CRUISER 1998 Factory Repair Manual
Manufacturer: TOYOTA, Model Year: 1998, Model line: LAND CRUISER, Model: TOYOTA LAND CRUISER 1998Pages: 3115, PDF Size: 54.88 MB
Page 2761 of 3115
RS0VP-01
H20950
- SUPPLEMENTAL RESTRAINT SYSTEMSEAT POSITION SENSOR ASSEMBLY
RS-91
2366 Author: Date:
2004 LAND CRUISER (RM1071U)
REMOVAL
NOTICE:
Do not open the cover or the case of the ECU and vari-
ous electrical devices unless absolutely necessary.
(If the IC terminals are touched, the IC may be de-
stroyed by static electricity.)
If the wiring connector of the SRS is disconnected
and the ignition switch is at ON position, DTCs will be
recorded.
1. REMOVE FRONT SEAT ASSEMBLY (DRIVER SIDE)
(See page BO-105)
2. REMOVE SEAT POSITION SENSOR ASSEMBLY
(a) Remove the bolt and seat position sensor assembly.
(b) Disconnect the connector.
Page 2762 of 3115
RS0UQ-01
- SUPPLEMENTAL RESTRAINT SYSTEMSEAT POSITION SENSOR ASSEMBLY
RS-93
2368 Author: Date:
2004 LAND CRUISER (RM1071U)
REPLACEMENT
REPLACEMENT REQUIREMENTS
In the following cases, replace the seat position sensor assembly.
If the seat position sensor assembly has been found to be faulty in troubleshooting.
If the seat position sensor assembly has been dropped.
CAUTION:
For removal and installation of the seat position sensor assembly, see page RS-91 and
RS-94. Be sure to follow the correct procedure.
Page 2763 of 3115
H20912
RS0VH-01
H20913Spiral Cable
H21094
H20914
H20915
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-3
2278 Author: Date:
2004 LAND CRUISER (RM1071U)
OPERATION
1. STEERING WHEEL PAD (with AIRBAG)
The inflater and bag of the SRS are stored in the steering wheel
pad and cannot be disassembled. The inflater contains a squib,
igniter charge, gas generator, etc., and inflates the bag when
instructed by the airbag sensor assembly.
2. SPIRAL CABLE (in COMBINATION SWITCH)
A spiral cable is used as an electrical joint from the vehicle body
side to the steering wheel.
3. FRONT PASSENGER AIRBAG ASSEMBLY
The inflater and bag of the SRS are stored in the front passen-
ger airbag assembly and cannot be disassembled. The inflater
contains a squib, igniter charge, gas generator, etc., and in-
flates the bag when instructed by the airbag sensor assembly.
4. SIDE AIRBAG ASSEMBLY
The inflater and bag of the SRS side airbag are stored in the
side airbag assembly and cannot be disassembled. The inflater
contains a squib, igniter charge, gas generator, etc., and in-
flates the bag when instructed by the side airbag sensor assem-
bly.
5. CURTAIN SHIELD AIRBAG ASSEMBLY
The inflater and bag of the SRS are stored in the curtain shield
airbag assembly and cannot be disassembled. The inflater con-
tains a squib, igniter charge, gas generator, etc., and inflates
the bag when instructed by the side airbag sensor assembly.
Page 2764 of 3115
H04096
H20916
H20917
H20918
H20919
RS-4
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2279 Author: Date:
2004 LAND CRUISER (RM1071U)
6. SEAT BELT PRETENSIONER
The seat belt pretensioner system is a component of the front
seat outer belt. The seat belt pretensioner cannot be disas-
sembled.
7. SRS WARNING LIGHT
The SRS warning light is located on the combination meter. It
goes on to alert the driver of trouble in the system when a mal-
function is detected in the airbag sensor assembly self-diagno-
sis. In normal operating conditions when the ignition switch is
turned to the ON position, the light comes on for about 3 se-
conds and then goes off.
8. AIRBAG SENSOR ASSEMBLY
The airbag sensor assembly is mounted on the floor inside the
front console box. The airbag sensor assembly consists of an
airbag sensor, safing sensor, diagnosis circuit, ignition control,
drive circuit, etc. It receives signals from the airbag sensor, front
airbag sensor, side and curtain shield airbag sensor assembly,
curtain shield airbag sensor assembly and judges whether the
SRS must be activated or not. The airbag sensor assembly can-
not be disassembled.
9. FRONT AIRBAG SENSOR
The front airbag sensor is mounted on each of the radiator side
supports. The front airbag sensor consists of a frontal decelera-
tion sensor, diagnosis circuit, etc. These send signals to the air-
bag sensor assembly. The front airbag sensor cannot be disas-
sembled.
10. SIDE AND CURTAIN SHIELD AIRBAG SENSOR AS-
SEMBLY
The side and curtain shield airbag sensor assembly is mounted
in the LH and RH center pillars. The side and curtain shield air-
bag sensor assembly consist of a lateral deceleration sensor,
safing sensor, diagnosis circuit, etc. These send signals to the
airbag sensor assembly to judge whether the SRS side airbag
and curtain shield airbag must be activated or not. The side and
curtain shield airbag sensor assembly cannot be disas-
sembled.
Page 2765 of 3115
H20920
H21045
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-5
2280 Author: Date:
2004 LAND CRUISER (RM1071U)
11. CURTAIN SHIELD AIRBAG SENSOR ASSEMBLY
The curtain shield airbag sensor assembly is mounted in the LH
and RH rear pillars. The curtain shield airbag sensor assembly
consists of a lateral deceleration sensor, safing sensor, diagno-
sis circuit, etc. These sensors send signals to the airbag sensor
assembly to judge whether the SRS curtain shield airbag must
be activated or not. The curtain shield airbag sensor assembly
cannot be disassembled.
12. SEAT POSITION SENSOR ASSEMBLY
The seat position sensor assembly is mounted on the seat rail
of the driver's seat. The sensor unit consists of a magnet sen-
sor, diagnosis circuit, etc. It judges the seat sliding position and
sends the signal to the airbag sensor assembly. The seat posi-
tion sensor assembly cannot be disassembled.
Page 2766 of 3115
H21890
Airbag
Sensor
Assembly12
3
8
91011
14
Front Airbag Sensor RH
5
Front Passenger Airbag
Assembly (Squib)
Spiral
Cable7Steering Wheel
Pad (Squib)6
15
4
16
18
17
19
Seat Belt
Pretensioner RH
Seat Belt
Pretensioner LH
Front Seat Inner Belt LH
Seat Position Sensor Front Airbag Sensor LH
1213
w/o Side Airbag: RS-6
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2281 Author: Date:
2004 LAND CRUISER (RM1071U)
13. SRS CONNECTORS
HINT:
SRS connectors are located as shown in the following illustra-
tion.
Page 2767 of 3115
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-7
2282 Author: Date:
2004 LAND CRUISER (RM1071U)No.
ItemApplication
(1)Terminal Twin-Lock MechanismConnectors 1, 2, 3, 4, 5, 7, 9, 10, 11, 12, 13, 14
(2)Activation Prevention MechanismConnectors 1, 2, 3, 4, 5, 6, 7, 8, 15
(3)Electrical Connection Check MechanismConnectors 1, 2, 3
(4)Half Connection Prevention MechanismConnectors 4, 5, 7, 9, 10, 11, 12, 13, 14
(5)Connector Lock MechanismConnectors 6
Page 2768 of 3115
H21159
Airbag
Sensor
Assembly12
3
8
9
10
11
12
13
14Side Airbag
Assembly RH (Squib)
Front Airbag Sensor RH
6
Front Passenger Airbag
Assembly (Squib)
Spiral
CableSteering Wheel
Pad (Squib)
7
15
Front Airbag Sensor LH
Side Airbag
Assembly LH (Squib)
5
16
18
17
Curtain Shield Airbag
Sensor Assembly RH
Curtain Shield Airbag
Assembly LH (Squib)
1920
21
22
Seat Belt
Pretensioner RH
Side and Curtain Shield
Airbag Sensor Assembly RH
Side and Curtain Shield
Airbag Sensor Assembly LHCurtain Shield Airbag
Assembly RH (Squib)
Curtain Shield Airbag
Sensor Assembly LH
Seat Belt
Pretensioner LH
Front Seat Inner Belt LH
Seat Position Sensor 23
RSCA Off Switch
24
25
26
RSCA Off Indicator
4
27
2829
w/ Side Airbag: RS-8
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2283 Author: Date:
2004 LAND CRUISER (RM1071U)
Page 2769 of 3115
Z05953
Spacer
Housing
Female Male
R10587
When Connector is Connected When Connector is Disconnected
Short Spring Plate
Housing
Housing
Terminal
ConnectorsShort Spring PlateSquib
Closed CircuitSquib Short Spring Plate ONContacting Male Terminal Short Spring Plate
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-9
2284 Author: Date:
2004 LAND CRUISER (RM1071U)No.
ItemApplication
(1)Terminal Twin-Lock MechanismConnectors 1, 2, 3, 4, 5, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24
(2)Activation Prevention MechanismConnectors 1, 2, 3, 4, 5, 6, 10, 13, 14, 21, 22, 25
(3)Electrical Connection Check MechanismConnectors 1, 2, 3
(4)Half Connection Prevention MechanismConnectors 4, 5, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22, 23, 24
(5)Connector Lock MechanismConnectors 6
(a) All connectors in the SRS are colored in yellow to distin-
guish them from other connectors. Connectors having
special functions and specifically designed for the SRS
are used in the locations shown on the previous page to
ensure high reliability. These connectors use durable
gold-plated terminals.
(1) Terminal Twin-Lock Mechanism
Each connector has a two-piece component con-
sisting of a housing and a spacer. This design al-
lows the terminal to be locked securely by two lock-
ing devices (the retainer and the lance) to prevent
terminals from coming out.
(2) Activation Prevention Mechanism
Each connector contains a short spring plate. When
the connector is disconnected, the short spring
plate automatically connects positive (+) terminal
and negative (-) terminal of the squib.
Page 2770 of 3115
H20053
Disconnection
Detection
Pin
Airbag Sensor Assembly
H01315
Terminal for Diagnosis
Disconnection Detection Pin Half ConnectionComplete Connection
Terminal for
Diagnosis
RS-10
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2285 Author: Date:
2004 LAND CRUISER (RM1071U)
HINT:
The type of connector is shown in the diagram on the previous
page.
(3) Electrical Connection Check Mechanism
This mechanism electrically checks that connectors
are connected correctly and completely. The electri-
cal connection check mechanism is designed so
that the disconnection detection pin is connected
with the diagnosis terminals when the connector
housing lock is locked.
HINT:
The illustration shows connectors º1º, º2º and º3º in
step 13.
Connectors 2 and 3 also have similar mechanism.