Nissan Terrano r20e. Manual — part 429
Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”
(Dual Air Bag System)
The Supplemental Restraint System “Air Bag” and “Seat Belt Pre-tensioner”, used along with a seat belt, help
to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The Supplemen-
tal Restraint System consists of air bag modules (located in the center of the steering wheel and on the
instrument panel on the passenger side), seat belt pre-tensioners, a diagnosis sensor unit, warning lamp, wir-
ing harness and spiral cable.
WARNING:
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To avoid rendering the SRS inoperative (which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation) all maintenance must be per-
formed by an authorized NISSAN dealer.
I
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
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Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so
in this Service Manual. SRS wiring harnesses are covered with yellow insulation (either just before
the harness connectors or for the complete harness), for easy identification.
Precautions for Steering System
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Before disassembly, thoroughly clean the outside of the unit.
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Disassembly should be done in a clean work area. It is important to prevent the internal parts from
becoming contaminated by dirt or other foreign matter.
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When disassembling parts, be sure to place them in order on a part rack so they can be reinstalled
in their proper positions.
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Use nylon cloths or paper towels to clean the parts; common shop rags can leave lint that might
interfere with their operation.
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Before inspection or reassembly, carefully clean all parts with a general purpose, non-flammable
solvent.
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Before assembly, apply a coat of recommended ATF* to hydraulic parts. Vaseline may be applied
to O-rings and seals. Do not use any grease.
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Replace all gaskets, seals and O-rings. Avoid damaging O-rings, seals and gaskets during instal-
lation. Perform functional tests whenever designated.
*: Automatic transmission fluid
PRECAUTIONS
ST-2
Special Service Tools
*: Special tool or commercial equivalent
Tool number
Tool name
Description
KV48100700
Torque adapter
Measuring pinion rotating torque
ST27180001*
Steering wheel puller
Removing and installing steering wheel
ST27850000
Ball joint remover
Removing ball joint
ST29020001*
Steering gear arm puller
Removing and installing pitman arm
ST3127S000*
q
1
GG91030000
Torque wrench
q
2
HT62940000
Socket adapter
q
3
HT62900000
Socket adapter
Measuring turning torque
KV48100301*
Strut & steering gearbox
attachment
Steering gear is installed
KV48103500-A
Pressure gauge
Measuring oil pressure
KV48102500
Pressure gauge adapter
Measuring oil pressure
KV481009S0
Oil seal drift set
q
1
KV48100910
Drift
q
2
KV48100920
Adapter
q
3
KV48100930
Adapter
Installing oil seal
PREPARATION
ST-3
Checking Steering Wheel Play
1. With wheels in a straight-ahead position, check steering wheel
play.
Steering wheel play:
35 mm (1.38 in) or less
2. If it is not within specification, check steering gear assembly
when front suspension and axle, steering gear assembly and
steering column are mounted correctly.
Checking Neutral Position on Steering Wheel
CHECKING
1. Check that the steering wheel is in the neutral position when
driving straight ahead.
2. If it is not in the neutral position, remove the steering wheel and
reinstall it correctly.
3. If the neutral position is between two serrated teeth, loosen
tie-rod lock nut and move tie-rod in the opposite direction by the
same amount on both left and right sides to compensate for
error in the neutral position.
Front Wheel Turning Angle
Rotate steering wheel all the way right and left; measure turning
angle.
Turning angle of full turns:
Refer to section FA for SDS.
Checking and Adjusting Drive Belts
Refer to section MA for Drive Belt Inspection.
Checking Fluid Level
Check the fluid level in the reservoir when the engine is cold. If the
fluid level is below the MIN line, and fluid up to the MAX line.
CAUTION:
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Do not overfill.
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Use only “DEXRON
TM
” type automatic transmission fluid.
SST103B
SST900A
SMA127
NST030
ON-VEHICLE SERVICE
ST-4
Checking Fluid Leakage
Check the lines for improper attachment and for leaks, cracks,
damage, loose connections, chafing or deterioration.
1. Run engine between idle speed and 1,000 rpm.
Make sure temperature of fluid in oil tank rises to 60 to 80°C
(140 to 176°F).
2. Turn steering wheel right-to-left several times.
3. Hold steering wheel at each “lock” position for five seconds and
carefully check for fluid leakage.
CAUTION:
Do not hold the steering wheel in a locked position for more
than 15 seconds.
4. If fluid leakage at connectors is noticed, loosen flare nut and
then retighten.
Do not overtighten connector as this can damage O-ring,
washer and connector.
Bleeding Hydraulic System
1. Raise front end of vehicle until wheels are clear of the ground.
2. Add fluid into oil tank to specified level. Meanwhile quickly turn
steering wheel fully to right and left and lightly touch steering
stoppers.
Repeat steering wheel operation until fluid level no longer
decreases.
3. Start engine.
Repeat step 2 above.
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Incomplete air bleeding will cause the following to occur. When
this happens, bleed air again.
a. Generation of air bubbles in reservoir tank
b. Generation of clicking noise in oil pump
c. Excessive buzzing in oil pump
While the vehicle is stationary or while moving the steering wheel
slowly, fluid noise may occur in the valve or oil pump. This noise is
inherent in this steering system, and it will not affect performance
or durability of the system.
SST621A
ON-VEHICLE SERVICE
ST-5
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