1998 NISSAN PICK-UP tow

Supplemental Restraint System (SRS) ``AIR
BAG'' (4WD models)
The Supplemental Restraint System ``Air Bag'', used along with a seat belt, helps to reduce the risk or
severity of injury to the driver in a frontal collision. The Supplemental Restraint System consists of an air
bag module (located in the center of the steering wheel), a diagnosis sensor unit, warning lamp, wiring har-
ness and spiral cable. Information necessary to service the system safely is included in theRS sectionof
this Service Manual.
WARNING:
lTo 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.
lImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
lDo not use electrical test equipment on any circuit related to the SRS unless instructed to 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.
Supplemental Restraint System (SRS) ``AIR
BAG'' (2WD models)
The Supplemental Restraint System ``Air Bag'', used along with a seat belt, helps to reduce the risk or
severity of injury to the driver in a frontal collision. The Supplemental Restraint System consists of an air
bag module (located in the center of the steering wheel), a diagnosis sensor unit, warning lamp and spiral
cable. Information necessary to service the system safely is included in theRS sectionof this Service
Manual.
WARNING:
lTo 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.
lImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
lDo not use electrical test equipment on any circuit related to the SRS.
Precautions for Steering System
lBefore disassembly, thoroughly clean the outside of the unit.
lDisassembly 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.
lFor easier and proper assembly, place disassembled parts in order on a parts rack.
lUse nylon cloths or paper towels to clean the parts; common shop rags can leave lint that might
interfere with their operation.
lBefore inspection or reassembly, carefully clean all parts with a general purpose, non-flammable
solvent.
lBefore assembly, apply a coat of recommended ATF* to hydraulic parts. Petroleum jelly may be
applied to O-rings and seals. Do not use any grease.
lReplace all gaskets, seals and O-rings. Avoid damaging O-rings, seals and gaskets during instal-
lation. Perform functional tests whenever designated.
*: Automatic Transmission Fluid type DEXRON
TMII E, DEXRONTMIII, or equivalent.
PRECAUTIONS AND PREPARATION
ST-1

Disassembly and Assembly
lWhen disassembling and assembling, unlock steering lock
with key.
lRemove combination switch.
lEnsure that rounded surface of snap ring faces toward bear-
ing when snap ring is installed.
lInstall snap ring on upper shaft with a suitable tool.
lSteering lock
a. Break self-shear type screws using a drill or other appropri-
ate tool.
b. Install self-shear type screws, then tighten until heads break
off.
SST722C
SST670B
SST741A
SST742A
STEERING WHEEL AND STEERING COLUMN
ST-11

Description
CAUTION:
lParts which can be disassembled are strictly limited.
Never disassemble parts other than those specified.
lDisassemble in as clean a place as possible.
lClean your hands before disassembly.
lDo not use rags; use nylon cloths or paper towels.
lFollow the procedures and cautions indicated in the Ser-
vice Manual.
SST809C
POWER STEERING SYSTEM (Model: PB48S)
ST-19

SECTOR SHAFT
1. Set piston rack at straight-ahead position.
Turn piston rack about 10É to 15É toward yourself with your
finger. This permits smooth insertion of sector gear.
2. Wrap vinyl tape around serration area of sector shaft.
Vinyl tape prevents oil seal lip from being damaged during
insertion.
3. Gradually insert sector shaft into gear housing, being careful
not to damage oil seal.
When inserting sector shaft into gear housing, remove plas-
tic film. Be careful not to drop bearings into gear housing.
4. Tighten sector shaft cover bolts.
5. Check turning torque and steering gear preload.
Refer to ``TURNING TORQUE MEASUREMENT'', ``Pre-disas-
sembly Inspection and Adjustment'', ST-21.
lIf turning torque is considerably different from the value
before disassembly, replace the entire assembly.
ST696
SST059
POWER STEERING GEAR (Model: PB48S)
Assembly (Cont'd)
ST-26

Description
CAUTION:
lParts which can be disassembled are strictly limited.
Never disassemble parts other than those specified.
lDisassemble in as clean a place as possible.
lClean your hands before disassembly.
lDo not use rags; use nylon cloths or paper towels.
lFollow the procedures and cautions indicated in the Ser-
vice Manual.
SST810C
POWER STEERING SYSTEM (Model: PB59K)
ST-27

10. Set piston rack at straight-ahead position.
Turn piston rack about 10É to 15É toward yourself with your
finger.
This enables smooth insertion of sector gear.
11. Gradually insert sector shaft into gear housing.
12. Tighten sector shaft cover bolts.
13. Set worm gear turning torque by turning sector shaft adjust-
ing screw and locking with lock nut.
Refer to ``TURNING TORQUE MEASUREMENT'', ``Pre-disas-
sembly and Adjustment'', ST-29.
lIf set and adjusting turning torque is considerably differ-
ent from the value before disassembly, replace the entire
assembly.
14. Check sector shaft end play in neutral position.
End play:
Less than 0.1 mm (0.004 in)
If not within specification, adjust it with adjusting screw.
15. Check worm gear preload. If not within specification, readjust
it.
ST696
SST328C
POWER STEERING GEAR (Model: PB59K)
Assembly (Cont'd)
ST-33

Inspection
PULLEY AND PULLEY SHAFT
lIf pulley is cracked or deformed, replace it.
lIf fluid leak is found around the pulley shaft, replace the oil
seal.
Disassembly
CAUTION:
lParts which can be disassembled are strictly limited.
Never disassemble parts other than those specified.
lDisassemble in as clean a place as possible.
lClean your hands before disassembly.
lDo not use rags; use nylon cloths or paper towels.
lWhen disassembling and reassembling, do not let for-
eign matter enter or contact the parts.
lRemove snap ring, then draw drive shaft out.
lBe careful not to drop drive shaft.
lRemove oil seal.
lBe careful not to damage front housing.
lRemove connector.
lBe careful not to drop control valve.
SST010B
SST034A
SST036A
POWER STEERING OIL PUMP
ST-35

Installation
1. Lower antenna rod by operating antenna motor.
2. Insert gear section of antenna rope into place with it facing
toward antenna motor.
3. As soon as antenna rope is wound on antenna motor, stop
antenna motor. Insert antenna rod lower end into antenna
motor pipe.
4. Retract antenna rod completely by operating antenna motor.
5. Install antenna nut and base.
ANTENNA ASSEMBLY REPLACEMENT
1. Remove antenna nut and antenna base.
2. Loosen bolts at antenna bracket and disconnect power
antenna connector.
3. Disconnect antenna feeder cable jack shown in ``LOCATION
OF ANTENNA''.
4. Remove fender protector.
5. Remove the grommet and pull the feeder cable out from
fender inner.
6. Remove antenna assembly and replace with a new one.
SEL342V
SEL240V
SEL340V
AUDIO ANTENNA
Power Antenna (Cont'd)
EL-149