1996 TOYOTA LAND CRUISER airbag

R13061
 Half Connection 
Comlate Connection
Terminal of Diagnosis Terminal of Diagnosis
Disconnection Detection Pin
−
SUPPLEMENTAL RESTRAINT SYSTEM SRS AIRBAG
RS−5
1996 LAND CRUISER (RM451U)
(3) Electrical Connection Check Mechanism
This mechanism electrically checks if connectors
are connected correctly and completely. The electri-
cal connection check mechanism is designed so
that the disconnection detection pin connects with
the diagnosis terminals when the connector hous-
ing lock is locked.
HINT:
The illustration shows connector 1.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

Z05490
Secondary LockPrimary Lock Lock Lock
Primary Lock Incomplate
(Secondary Lock Prevended) Primary Lock Complate
(Secondary Lock Permitted
Twin−Lock Complated
Z14034
Fig.1
Fig.2 Power Source
SafingSensor Squibs
Airbag
Sensor
RS−6
−
SUPPLEMENTAL RESTRAINT SYSTEM SRS AIRBAG
1996 LAND CRUISER (RM451U)
(4) Connector Twin −Lock Mechanism
With this mechanism connectors (male and female
connectors) are locked by 2 locking devices to in-
crease connection reliability. If the primary lock is in-
complete, ribs interfere and prevent the secondary
lock.
(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 airbag sensor go
on simultaneously.When a deceleration force acts on the
sensors, two squibs in the driver airbag and front passen-
ger airbag ignite and generate gas. The gas discharging
into the driver airbag and front passenger airbag rapidly
increases the pressure inside the bags, breaking open
the steering wheel pad and instrument panel door.
Bag inflation then ends, and the bags deflate as the gas
is discharged through discharge holes at the bag’s rear or
side.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

RS0P3−01
R12685
Horn Bottom Contact Plate
−
SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL PAD AND SPIRAL CABLE
RS−9
1996 LAND CRUISER (RM451U)
INSPECTION
1. VEHICLES NOT INVOLVED IN A COLLISION
(a) Do a diagnostic system check (See page DI−240).
(b) With the steering wheel pad (with airbag) installed in the vehicle, do a visual check with includes the following
items.
Check for cuts, minute cracks or marked discoloration of
the steering wheel pad top surface and grooved portion.
2. VEHICLES INVOLVED IN A COLLISION
(a) Do a diagnostic system check (See page DI−240).
(b) Do a visual check. With the steering wheel pad removed from the vehicle, do
a visual check with includes the following items.
Check for cuts and cracks in, or marked discolor-
ation of, the steering wheel pad top surface and its
grooved portion.
Check for cuts and cracks in wire harnesses, and for
chipping in connectors.
Check for deformation of the horn button contact
plate of the steering wheel.
HINT:
If the horn button contact plate of the steering wheel is de-
formed, never repair it. Always replace the steering wheel
assembly with a new one.
There should be no interference between the steering
wheel pad and the steering wheel, and the clearance
should be uniform all the way around when the new steer-
ing wheel pad is installed on the steering wheel.
CAUTION:
For removal and installation of the steering wheel pad, see
pages SR−11 and SR−19 and be sure to follow the correct
procedure.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

RS−10
−
SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL PAD AND SPIRAL CABLE
1996 LAND CRUISER (RM451U)
3. VEHICLE INVOLVED IN COLLISION AND AIRBAG IS
DEPLOYED
Do a visual check with includes the following items with the
steering wheel pad removed from the vehicle.
Check for deformation of the horn button contact
plate of the steering wheel.
Check for damage to the spiral cable connector and
wire harness.
HINT:
There should be no interference between the steering wheel
pad and the steering wheel, and the clearance should be uni-
form all the way around when the new steering wheel pad is
installed on the steering wheel.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

RS0P5−01
AB0152
SST
−
SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL PAD AND SPIRAL CABLE
RS−11
1996 LAND CRUISER (RM451U)
DISPOSAL
HINT:
When scrapping vehicle equipped with an SRS or disposing of
a steering wheel pad (with airbag), always first deploy the air-
bag in accordance with the procedure described below. If any
abnormality occurs with the airbag deployment, contact the
SERVICE DEPT. of the TOYOTA MOTOR SALES, U.S.A., INC.
When disposing of a steering wheel pad with an airbag
deployed in a collision, follow the same procedure given in step
1−(d) in ”DISPOSAL”.
CAUTION:
Never dispose of a steering wheel pad which has an
undeployed airbag.
The airbag produces a sizeable exploding sound
when it deploys, so perform the operation out of
doors and where it will not create a nuisance to
nearby residents.
When deploying the airbag, always use the specified
SST (SRS Airbag Deployment Tool). Perform the op-
eration in a place away from electrical noise.
SST 09082−00700
When deploying an airbag, perform the operation at
least 10 m (33 ft) away from the steering wheel pad.
The steering wheel pad is very hot when the airbag is
deployed, so leave it alone for at least 30 minutes af-
ter deployment.
Use gloves and safety glasses when handling a steer-
ing wheel pad with the deployed airbag.
Always wash your hands with water after completing
the operation.
Do not apply water, etc. to a steering wheel pad with
the deployed airbag.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AB0158
SSTBattery
AB0152
SST
AB0158
SST
Battery
H01580
SST
RS−12
−
SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL PAD AND SPIRAL CABLE
1996 LAND CRUISER (RM451U)
1. AIRBAG DEPLOYMENT WHEN SCRAPPING VE-
HICLE
HINT:
Have a battery ready as the power source to deploy the airbag.
(a) Check functioning of the SST.
CAUTION:
When deploying the airbag, always use the specified SST:
SRS Airbag Deployment Tool. SST 09082−00700
(1) Connect the SST to the battery.Connect the red clip of the SST to the battery posi-
tive (+) terminal and the black clip to the battery neg-
ative (−) terminal.
HINT:
Do not connect the yellow connector which will be connected
with the supplemental restraint system.
(2) Check functioning of the SST.Press the SST activation switch, and check that the
LED of the SST activation switch lights up.
CAUTION:
If the LED lights up when the activation switch is not being
pressed, SST malfunction is probable, so definitely do not
use the SST.
(b) Install the SST.
CAUTION:
Check that there is no looseness in the steering wheel and
steering wheel pad. (1) Remove the steering column lower cover.Remove the 3 screws and steering column lower
cover as shown in the illustration.
(2) Disconnect the airbag connector of the spiral cable.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

SST
R13455
10 m (33 ft) or more
H02457
−
SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL PAD AND SPIRAL CABLE
RS−13
1996 LAND CRUISER (RM451U)
(3) Connect the SST connector to the airbag connector
of the spiral cable.
SST 09082−00700
(4) Move the SST at least 10 m (33 ft) away from the front of the vehicle.
(5) Close all the doors and windows of the vehicle.
NOTICE:
Take care not to damage the SST wire harness. (6) Connect the SST red clip to the battery positive (+)
terminal and the black clip to the negative ( −) termi-
nal.
(c) Deploy the airbag. (1) Confirm that no one is inside the vehicle or within 10
m (33 ft) area around the vehicle.
(2) Press the SST activation switch and deploy the air- bag.
HINT:
The airbag deploys simultaneously as the LED of the SST ac-
tivation switch lights up.
(d) Dispose of steering wheel pad (with airbag).
CAUTION:
The steering wheel pad is very hot when the airbag is
deployed, so leave it alone for at least 30 minutes af-
ter deployment.
Use gloves and safety glasses when handling a steer-
ing wheel pad with the deployed airbag.
Always wash your hands with water after completing
the operation.
Do not apply water, etc. to a steering wheel pad with
the deployed airbag.
(1) When scrapping a vehicle, deploy the airbag and scrap the vehicle with the steering wheel pad still
installed.
(2) When moving a vehicle for scrapping which has a
steering wheel pad with deployed airbag, use
gloves and safety glasses.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

Connector
AB0163
Wire Harness
Diameter
Stripped Wire Harness Section
RS−14
−
SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL PAD AND SPIRAL CABLE
1996 LAND CRUISER (RM451U)
2. DEPLOYMENT WHEN DISPOSING OF STEERING
WHEEL PAD ONLY
NOTICE:
When disposing of the steering wheel pad (with air-
bag) only, never use the customers vehicle to deploy
the airbag.
Be sure to follow the procedure given below when de-
ploying the airbag.
HINT:
Have a battery ready as the power source to deploy the airbag.
(a) Remove the steering wheel pad (See page SR−11).
CAUTION:
When storing the steering wheel pad, keep the upper sur-
face of the pad facing upward.
(b) Remove the connector on the rear surface of the steering
wheel pad from the bracket.
(c) Using a service −purpose wire harness, tie down the
steering wheel pad to the disc wheel.
Wire harness: Stripped wire harness section
1.25 mm
2 or more (0.0019 in2 or more).
HINT:
To calculate the square of the stripped wire harness section:
Square = 3.14 x (Diameter)
2 divided by 4
CAUTION:
If a wire harness which is too thin or some other thing is
used to tie down the steering wheel pad, it may be snapped
by the shock when the airbag is deployed. This is highly
dangerous. Always use a wire harness for vehicle use
which is at least 1.25 mm
2 (0.0019 in2).
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010