1998 TOYOTA LAND CRUISER sensor

H20053
Disconnection
Detection
Pin
Airbag Sensor Assembly
H01315
Terminal for Diagnosis
Disconnection Detection Pin
Half Connection
Complete 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.

C51019H20054
Stopper
Locking PartSpring
Slider
Locking Arm
Rebounded by Slider
(Spring)Stopper
H20055
Z14034
Fig.1
Fig.2Power Source
Safing
Sensor
Squibs
Deceleration Sensor
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-1 1
2286 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(4) Half connection prevention mechanism:
If the connector is not completely connected, the
connector is disconnected due to the spring opera-
tion to the extent that no continuity exists.
(5) Connector lock mechanism:
Locking the connector lock button securely con-
nects the connector.
(b) When the vehicle is involved in a frontal collision in the
hatched area (Fig. 1) and the shock is larger than the pre-
determined level, the SRS is activated automatically. A
safing sensor is designed to go on at a smaller decelera-
tion rate than the airbag sensor. As illustrated in Fig. 2,
ignition is caused when current flows to the squib, which
happens when a safing sensor and the deceleration sen-
sor go on simultaneously. When a deceleration force acts
on the sensors, 2 squibs in the driver airbag and front pas-
senger airbag ignite and generate gas. The gas discharg-
ing into the driver airbag and front passenger airbag rap-
idly increases the pressure inside the bags, breaking
open the steering wheel pad and instrument panel.
Bag inflation then ends, and the bags deflate as the gas
is discharged through discharge holes at the bag's rear or
side.

H02763
Outer
H02764
Lock of connector is released
Disconnection is completed
H02768
Outer
Outer
Connection is completed RS-12
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2287 Author
: Date
:
2004 LAND CRUISER (RM1071U)
14. DISCONNECTION OF CONNECTORS FOR FRONT
AIRBAG SENSOR, SIDE AND CURTAIN SHIELD AIR-
BAG SENSOR AND CURTAIN SHIELD AIRBAG SEN-
SOR
(a) While holding both flank sides of the outer, slide the outer
in the direction shown by an arrow.
(b) Lock of the connectors is released, and then disconnect
the connectors.
HINT:
Be sure to hold both flank sides of the outer. If holding the top
and bottom sides, it will obstruct disconnection.
15. CONNECTION OF CONNECTORS FOR FRONT AIR-
BAG SENSOR, SIDE AND CURTAIN SHIELD AIRBAG
SENSOR AND CURTAIN SHIELD AIRBAG SENSOR
(a) Align the male connector (of the side of sensor) and fe-
male connector in the same direction as shown in the il-
lustration and fit them in without rubbing.
(b) As they are fitted in, the outer slides rearward. Press it un-
til the outer returns to its original position again.
If fitting stops half way, connectors will separate.
(c) Be sure to insert until they are locked. After fitting in, pull
them slightly to check that they are locked. (When locked,
make sure that the outer returns to its original position and
sound to be fit in can be heard.)

RS0B6-06
- SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS-1
2276 Author
: Date
:
2004 LAND CRUISER (RM1071U)
SRS AIRBAG
PRECAUTION
CAUTION:

The LAND CRUISER is equipped with SRS, which comprises a driver airbag, front passenger
airbag, side airbag and curtain shield airbag. Failure to carry out service operations in the cor-
rect sequence could cause the SRS to unexpectedly deploy during servicing, possibly leading
to a serious accident. Further, if a mistake is made in servicing the SRS, it is possible that the
SRS may fail to operate when required. Before performing servicing (including removal or
installation of parts, inspection or replacement), be sure to read the following items carefully,
then follow the correct procedures described in the repair manual.

Work must be started 90 seconds after the ignition switch is turned to the ºLOCKº position and
the negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a back-up power source so that if work is started within 90 seconds
from disconnecting the negative (-) terminal cable of the battery, the SRS may be deployed.)

Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly,
curtain shield airbag assembly, airbag sensor assembly, front airbag sensor, side and curtain
shield airbag sensor assembly, curtain shield airbag sensor assembly or seat position sensor
assembly directly to hot air or flames.
NOTICE:

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.

Even in the case of a minor collision where the SRS does not deploy, the steering wheel pad,
front passenger airbag assembly, side airbag assembly, curtain shield airbag assembly, airbag
sensor assembly, front airbag sensor, side and curtain shield airbag sensor assembly, curtain
shield airbag sensor assembly and seat position sensor assembly should be inspected (See
page RS-18, RS-32, RS-47, RS-60, RS-71, RS-76, RS-81, RS-87 and RS-92).

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side
airbag assembly, curtain shield airbag assembly, airbag sensor assembly, front airbag sensor,
side and curtain shield airbag sensor assembly, curtain shield airbag sensor assembly or seat
position sensor assembly in order to reuse it.

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, curtain
shield airbag assembly, airbag sensor assembly, front airbag sensor, side and curtain shield
airbag sensor assembly, curtain shield airbag sensor assembly or seat position sensor assem-
bly has been dropped, or if there are cracks, dents or other defects in the case, bracket or con-
nector, replace it with new one.

Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's
electrical circuits.

Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions on the notice.

After work on the SRS is completed, perform the SRS warning light check (See page DI-692).

RS0BU-07
H19947
Front Airbag Sensor LHFront Airbag Sensor RHFront Passenger
Airbag Assembly
Seat Belt
Pretensioner RH
Airbag Sensor Assembly Seat Belt
Pretensioner LHSpiral Cable
Curtain Shield Airbag
Sensor Assembly LHCurtain Shield Airbag
Sensor Assembly RH Side and Curtain Shield Airbag
Sensor Assembly LH
Side and Curtain Shield Airbag
Sensor Assembly RH Side Airbag Assembly LHSide Airbag Assembly RH Curtain Shield Airbag
Assembly LH
Curtain Shield Airbag
Assembly RH Steering Wheel Pad
(w/ Airbag)
RSCA Off
Switch
Seat Position Sensor
Assembly
RS-96
- SUPPLEMENTAL RESTRAINT SYSTEMWIRE HARNESS AND CONNECTOR
2371 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRE HARNESS AND CONNECTOR
LOCATION

SR-66
- STEERINGPOWER STEERING GEAR
2275 Author
: Date
:
2004 LAND CRUISER (RM1071U)
10. INSTALL NO. 1 ENGINE UNDER COVER
Tighten the 7 bolts.
11. POSITION FRONT WHEELS FACING STRAIGHT
AHEAD
HINT:
Do it with the front of the vehicle jacked up.
12. CENTER SPIRAL CABLE (See page SR-24)
13. INSTALL STEERING WHEEL
(a) Align the matchmarks on the wheel and steering column
main shaft.
(b) Temporarily tighten the wheel set nut.
(c) Connect the connector.
14. BLEED POWER STEERING SYSTEM (See page
SR-4)
15. CHECK STEERING WHEEL CENTER POINT
16. TORQUE STEERING WHEEL SET NUT
Torque: 50 N´m (510 kgf´cm, 37 ft´lbf)
17. INSTALL STEERING WHEEL PAD (See page SR-24)
18. CHECK FRONT WHEEL ALIGNMENT (See page
SA-6)
19. PERFORM ZERO POINT CALIBRATION OF YAW RATE
AND DECELERATION SENSORS (See page DI-505)

F16017
Steering Column
Upper Cover
New Marked
Line
Steering Wheel
R00429
Marked Line
F16018
- STEERINGSTEERING WHEEL
SR-1 1
2220 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(d) Turn the steering wheel to its straight position.
HINT:
Refer to the upper surface of the steering wheel, steering spoke
and SRS airbag line for the straight position.
(e) Draw a new line on the masking tape of the steering wheel
as shown in the illustraion.
(f) Measure the distance between the 2 lines on the masking
tape of the steering wheel.
(g) Convert the measured distance to steering angle.
Measured distance 1 mm (0.04 in.) = Steering angle
approximately 1 deg.
HINT:
Make a note of the steering angle.
2. ADJUST STEERING ANGLE
(a) Draw a line on the RH and LH tie rod and rack ends where
it can easily be seen.
(b) Using a paper gauge, measure the distance from RH and
LH tie rod ends to the rack end screws.
HINT:

Measure the RH side and LH side.

Make a note of the measured values.
(c) Remove the RH and LH boot clips from the rack boots.
(d) Loosen the RH and LH lock nuts.
(e) Turn the RH and LH rack end by the same amount (but
in different directions) according to the steering angle.
1 turn 360 deg. of rack end (1.5 mm (0.059 in.) horizon-
tal movement) = 12 deg. of steering angle
(f) Tighten the RH and LH lock nuts.
Torque: 55 N´m (560 kgf´cm, 41 ft´lbf)
NOTICE:
Make sure that the difference in length between RH and LH
tie rod ends and rack end screws are within 1.5 mm (0.059
in.).
(g) Install the RH and LH boot clips.
(h) Perform the zero point calibration of yaw rate and decel-
eration sensors (See page DI-505).

Z16462
RLP RM1 M2
4WD GND SPD IG Wire harness:
Z16461
GND
4WDRLP M1M2 ECU: SA-164
- SUSPENSION AND AXLEDIFFERENTIAL LOCKING SYSTEM
2114 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(b) Inspect the system circuit with the connector discon-
nected.
Disconnect the connector from the rear diff. lock control
ECU and inspect the connector on the wire harness side,
as shown in the table.
Symbols (Terminals No.)Trouble partConditionSpecified value
M1 - M2RR Diff. Lock Actuator-Less than 100 W
GND - Body groundBody ground-Continuity
SPD - Body groundSpeed sensorVehicle moves slowly1 pulse each
40 cm (15.75 in.)
IG - Body groundDIFF FuseIgnition switch ON10 - 14 V
RLP B d dRear Diff. Lock Indica-Ignition switch ON with indicator light ONAbout 0 VRLP - Body groundRear Diff. Lock Indica
tor SwitchIgnition switch ON with indicator light OFF10 - 14 V
4WD B d dL iti S it hIgnition switch ON with T/F shift lever except LAbout 0 V4WD - Body groundL position SwitchIgnition switch ON with T/F shift lever L10 - 14 V
RBd dDifferential Lock Con-Ignition switch ON with differential lock control switch RR10 - 14 VR - Body groundDifferential Lock Con
trol SwitchIgnition switch ON with differential lock control switch OFFAbout 0 V
HINT:
If the circuit is not as specified value, check and repair or re-
place the trouble part shown in the table above.
(c) Inspect the system circuit with the connector connected.
(1) Turn the ignition switch to the ON position.
(2) Shift the transfer shift lever to L position.
(3) Using a voltmeter, measure the voltage when the
differential lock control switch is in the position, as
shown in the table.
Tester Connection

- Switch positionSpecified valve
4WD - GND-10 - 14 V
RLP - GNDRR*0.5 V or less
M1 - M2OFF " RR0.5 V or less " 10 - 14 V
(A 1 )05VM2 - M1RR " OFF(Approx. 1 sec.) "0.5 V
or less
*: The rear differential should be locked mechanically.
If the circuit is not as specified value, replace the ECU.
(4) Install the ECU in place.