1996 TOYOTA LAND CRUISER Drive

RS0OZ−02
−
SUPPLEMENTAL RESTRAINT SYSTEM SRS AIRBAG
RS−1
1100
Author: Date:
1996 LAND CRUISER (RM451U)
SRS AIRBAG
PRECAUTION
NOTICE:
The LAND CRUISER is equipped with an SRS , which comprises a driver airbag \
and a front pas-
senger airbag. Failure to carry out service operations in the correct sequence could cause the
SRS to unexpectedly deploy during servicing, possibly leading to a serio\
us accident. Further,
if a mistake is made in servicing the SRS, it is possible the SRS may fail to\
operate when re-
quired. Before performing servicing (including removal or installation \
of parts, inspection or
replacement), be sure to read the following items carefully, then follow the correct procedure
described in the repair manual.
Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the mos\
t impor-
tant source of information when troubleshooting. When troubleshooting th\
e SRS, always in-
spect the DTCs before disconnecting the battery.
Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front
passenger airbag assembly, and airbag sensor assembly should be inspected (See pages
RS−9 , RS−23 and RS−34 )
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 , or air-
bag sensor assembly in order to reuse it.
If the steering wheel pad, front passenger airbag assembly or airbag sen\
sor assembly have
been dropped, or if there are cracks, dents or other defects in the case, br\
acket or connector,
replace them with new ones.
Use a volt/ohmmeter wi th high impedance (10 k Ω/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 notices.
After work on the SRS is completed, check the SRS warning light (See pa\
ge DI−240).
If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.
CAUTION:
Work must be started after 90 seconds from the time the ignition switch is t\
urned to the ”LOCK”
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
of disconnecting the negative ( −) terminal cable of the battery, the SRS may be deployed.)
When the negative (−) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record o\
f the contents mem-
orized in the audio memory system. When work is finished, reset the audio syst\
ems as they
were before and adjust the clock. To avoid erasing the memory of each memory system, never
use a back−up power supply from outside the vehicle.
Before repairs, remove the airbag sensor if shocks are likely to be applied to the senso\
r during
repairs.
Do not expose the steering wheel pad, front passenger airbag assembly, or airbag sensor as-
sembly directly to hot air or flames.
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RS0P0−01
AB0250Spiral Cable
R13451
RS−2
−
SUPPLEMENTAL RESTRAINT SYSTEM SRS AIRBAG
1996 LAND CRUISER (RM451U)
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 generant, 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 generant, etc., and inflates
the bag when instructed by the airbag sensor assembly.
4. 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. In normal
operating condition when the ignition switch is turned to the
ACC or ON position, the light goes on for about 6 seconds and
then goes off.
5. AIRBAG SENSOR ASSEMBLY
The airbag sensor assembly is mounted on the floor inside the
console box. The airbag sensor assembly consists of an airbag
sensor, safing sensor, diagnosis circuit and ignition control,
drive circuit, etc.
It receives signals from the airbag sensors and judges whether
the SRS must be activated or not.
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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.
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SA1U7−01
−
SUSPENSION AND AXLE TROUBLESHOOTING
SA−1
858
Author: Date:
1996 LAND CRUISER (RM451U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers \
indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.
(w/ Differential locking system):
Check that center differential lock mode is set.
When switching differential Free↔Lock, the indicator lamp will blink if the gears of the differen-
tial lock sleeve are not meshed. If this occurs, when the tires are rotated \
to apply differential
power to the differential, the differential locks and the indicator lamp\
light up.
SymptomSuspect AreaSee page
Wander/ pulls
1. Tires: worn or improperly inflated
2. Wheel alignmemt: incorrect
3. Steering linkage: loosen or worn
4. Hub bearings: loosen or worn
5. Steering gear: out of adjustment or brokenSA−3
SA−4
SR−47 SA−8
SR−41
Bottoming
1. Vehicle: overloaded
2. Spring weak
3. Shock absorber: worn out−
SA−49
SA−49
Sways/ pitches
1. Tires: worn or improperly inflated
2. Stabilizer bar: bent or broken
3. Shock absorber: worn outSA−3
SA−60
SA−49
Front wheel shimmy
1. Tires: worn or improperly inflated
2. Wheels: out of balance
3. Shock absorber: worn out
4. Wheel alignmemt: incorrect
5. Hub bearings: loosen or worn
6. Steering linkage: loosen or worn
7. Steering gear: out of adjustment or brokenSA−3
SA−3
SA−49 SA−3
SA−7
SR−45
SR−38
Abnormal tire wear
1. Tires: worn or improperly inflated
2. Wheel alignmemt: incorrect
3. Suspension parts: worn out
4. Shock absorber: worn outSA−3
SA−3 −
SA−49
Noise in front dif ferential
1. Oil level: low or wrong grade
2. Excessive backlash between pinion and ring gear
3. Ring, pinion ro side gears: worn or chipped
4. Pinion shaft bearing: worn
5. Side bearing: worn
6. Differential bearing: loosen or wornSA−21
SA−29
SA−29
SA−29
SA−29
SA−29
Oil leak from front dif ferential
1. Oil level: too high or wrong grade
2. Drive pinion oil seal: worn or damaged
3. Side gear oil seal: worn or damaged
4. Companion flange: loosen or damaged
5. Side gear shaft: damagedSA−21
SA−29
SA−29
SA−29
SA−29
Noise in rear axle
1. Oil level: low or wrong grade
2. Excessive backlash between pinion and ring gear
3. Ring, pinion ro side gears: worn or chipped
4. Pinion shaft bearing: worn
5. Axle shaft bearing: worn
6. Differential bearing: loosen or wornSA−73
SA−87
SA−87
SA−87
SA−87
SA−87
Oil leak from rear axle1. Oil seal: worn or damaged
2. Rear axle housing: crackedSA−73
−
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SA1UB−01
SA2635
SST
−
SUSPENSION AND AXLE FRONT AXLE HUB
SA−7
1996 LAND CRUISER (RM451U)
REMOVAL
1. REMOVE FRONT WHEEL
2. REMOVE BRAKE CALIPER (See page BR−25 )
3. REMOVE FLANGE
(a) Using a screwdriver and hammer, remove the grease cap
from the flange.
(b) Using a snap ring expander, remove the snap ring.
(c) Loosen the 6 mounting nuts.
(d) Using a brass bar and hammer, tap on the 6 bolts heads and remove the 6 cone washers, plate washers and nuts.
(e) Remove the flange.
(f) Remove the gasket.
4. REMOVE AXLE HUB WITH DISC
(a) Using a screwdriver, release the lock washer.
(b) Using SST, remove the lock nut. SST 09607−60020
(c) Remove the lock washer.
(d) Using SST, remove the adjusting nut and thrust washer.
SST 09607−60020
(e) Remove the hub and disc together with the outer bearing.
5. REMOVE OIL SEAL AND INNER BEARING
(a) Using SST, remove the oil seal. SST 09308−00010
(b) Remove the inner bearing from the hub.
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SA1UB−01
SA2635
SST
−
SUSPENSION AND AXLE FRONT AXLE HUB
SA−7
1996 LAND CRUISER (RM451U)
REMOVAL
1. REMOVE FRONT WHEEL
2. REMOVE BRAKE CALIPER (See page BR−25 )
3. REMOVE FLANGE
(a) Using a screwdriver and hammer, remove the grease cap
from the flange.
(b) Using a snap ring expander, remove the snap ring.
(c) Loosen the 6 mounting nuts.
(d) Using a brass bar and hammer, tap on the 6 bolts heads and remove the 6 cone washers, plate washers and nuts.
(e) Remove the flange.
(f) Remove the gasket.
4. REMOVE AXLE HUB WITH DISC
(a) Using a screwdriver, release the lock washer.
(b) Using SST, remove the lock nut. SST 09607−60020
(c) Remove the lock washer.
(d) Using SST, remove the adjusting nut and thrust washer.
SST 09607−60020
(e) Remove the hub and disc together with the outer bearing.
5. REMOVE OIL SEAL AND INNER BEARING
(a) Using SST, remove the oil seal. SST 09308−00010
(b) Remove the inner bearing from the hub.
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SA1UK−01
Z15176
SST
R13186
SST
SA1973
SST
SA1969
SST
−
SUSPENSION AND AXLE FRONT DIFFERENTIAL REAR OIL SEAL
SA−21
1996 LAND CRUISER (RM451U)
REPLACEMENT
1. DRAIN DIFFERENTIAL OIL
2. REMOVE FRONT PROPELLER SHAFT
(See page PR−3 )
3. REMOVE COMPANION FLANGE
(a) Using a chisel and hammer, loosen the staked part of the
nut.
(b) Using SST to hold the flange, remove the nut and plate washer.
SST 09330−00021
(c) Using SST, remove the companion flange. SST 09950−30010 (09951 −03010, 09953−03010,
09954 −03010, 09955 −03030, 09956−03020)
4. REMOVE OIL SEAL AND OIL SLINGER
(a) Using SST, remove the oil seal. SST 09308−10010
(b) Remove the oil slinger.
5. REMOVE REAR BEARING
Using SST, remove the rear bearing from the drive pinion. SST 09556−22010
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SA2430
SST
SA2271
R13155
SSTSST
Oil Storage Ring
Rear Bearing
SA2411
SST
1.0 mm (10.039 in.)
R13139
SST
SA−22
−
SUSPENSION AND AXLE FRONT DIFFERENTIAL REAR OIL SEAL
1996 LAND CRUISER (RM451U)
6. REMOVE REAR BEARING OUTER RACE
Using SST, remove the bearing outer race.
SST 09308−00010
NOTICE:
Do not scratch the taper surface of the outer race.
7. REMOVE OIL STORAGE RING
Using a screwdriver, bend the oil storage ring and drive it out.
8. REMOVE BEARING SPACER
9. INSTALL BEARING SPACER
10. INSTALL OIL STORAGE RING
Using SST, install a new oil storage ring. SST 09316−60011 (09316 −00011, 09316−00021)
11. INSTALL REAR BEARING
(a) Using SST, install the bearing outer race.
SST 09316−60011 (09316 −00011, 09316−00021)
(b) Install the rear bearing.
12. INSTALL OIL SLINGER AND OIL SEAL
(a) Install the oil slinger.
(b) Using SST, install a new oil seal, as shown. SST 09214−76011
Oil seal drive in depth: 1.0 mm (0.039 in.)
(c) Coat the lip of the oil seal with MP grease.
13. INSTALL COMPANION FLANGE
(a) Using SST, install the companion flange on the drive pin- ion.
SST 09950−30010 (09951 −03010, 09953−03010,
09954 −03010, 09955 −03030, 09956−03020)
(b) Place the plate washer on the companion flange.
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