st.pdf

STEERING SYSTEM

SECTION ST

CONTENTS

PRECAUTIONS AND PREPARATION .......................... 2

Precautions ................................................................ 2

Preparation ................................................................ 2

PREPARATION .............................................................. 3

NOISE, VIBRATION AND HARSHNESS (NVH)

TROUBLESHOOTING ................................................... 4

NVH Troubleshooting Chart. ...................................... 4

ON-VEHICLE INSPECTION .......................................... 5

Checking Steering Wheel Play .................................. 5

Checking Neutral Position on Steering Wheel .......... 5

Front Wheel Turning Angle ........................................ 5

Checking Gear Housing Movement .......................... 5

Checking and Adjusting Drive Belts .......................... 6

Checking Fluid Level ................................................. 6

Checking Fluid Leakage ............................................ 6

Bleeding Hydraulic System ........................................ 6

Checking Steering Wheel Turning Force .................. 7

Checking Hydraulic System. ...................................... 8

STEERING WHEEL AND STEERING COLUMN .......... 9

Removal and Installation ......................................... 10

Disassembly and Assembly ......................................11

Inspection ................................................................. 12

POWER STEERING GEAR AND LINKAGE .............. 14

Removal and Installation ......................................... 14

Disassembly ............................................................. 17

Inspection. ................................................................ 17

Assembly ................................................................. 19

SR20DE

POWER STEERING OIL PUMP .................................. 20

CD20T

POWER STEERING OIL PUMP .................................. 21

QG16, 18DE

POWER STEERING OIL PUMP .................................. 22

SR20DE, CD20T, QG16DE, QG18DE

SERVICE DATA AND SPECIFICATIONS (SDS) ........ 23

General Specifications ............................................. 23

Inspection and Adjustment ...................................... 23

PRECAUTIONS AND PREPARATION

Precautions

Supplemental Restraint System (SRS) “AIR BAG”

and “SEAT BELT PRE-TENSIONER”

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

Supplemental 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, wiring harness and spiral cable.

If the vehicle is equipped with side air bag as the Supplemental Restraint System, the side air bag used along

with the seat belt helps to reduce the risk or severity of injury to the driver and front passenger in a side

collision. The side air bag consists of air bag modules (located in the outer side of front seats), satellite

sensor, diagnosis sensor unit (which is one of components of air bags for a frontal collision), wiring harness,

warning lamp (which is one of components of air bags for a frontal collision).

WARNING:

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.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-

sonal injury caused by unintentional activation of the system.

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.

STEERING SYSTEM

Before disassembly, thoroughly clean the outside of the unit.

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.

When disassembling parts, be sure to place them in order on a part rack so they can be rein-

stalled in their correct positions.

Only use nylon cloths or paper towels to clean parts. Do not use rags or other materials contain-

ing lint. Residual debris may damage the system.

Before inspection or reassembly, carefully clean all parts with a general purpose, non-flammable

solvent.

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.

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

Preparation

SPECIAL SERVICE TOOL

Tool number

Tool name

Description

ST27180001

Steering wheel puller

Removing and installing steering wheel

NT170

ST-2

PREPARATION

SPECIAL SERVICE TOOLS

Tool number

Tool name

Description

KV48100700

Torque adapter

Measuring pinion rotating torque

HT72520000

Ball joint remover

Removing ball joint

ST27091000

Pressure gauge

Measuring oil pressure

KV48102500

Pressure gauge adapter

Measuring oil pressure

ST3127S000

Measuring turning torque

1 GG91030000

Torque wrench

2 HT62940000

Socket adapter

3 HT62900000

Socket adapter

ST-3

Fluid level

ST-6

Air in hydraulic system

ST-6

Tie-rod ball joint swinging force

ST-18

Tie-rod ball joint rotating torque

ST-18

Tie-rod ball joint end play

ST-19

Steering gear fluid leakage

Steering wheel play

ST-6

ST-5

Steering wheel turning force

ST-7

Drive belt looseness

Refer to MA section.

Improper steering wheel

—

Improper installation or looseness of tilt lock lever

ST-12

Mounting rubber deterioration

Steering column deformation or damage

ST-5

ST-13

Improper installation or looseness of steering column

ST-11

Steering linkage looseness

ST-14

DRIVE SHAFT

NVH in FA section

AXLE AND SUSPENSION

TIRES

NVH in FA, RA section

NVH in FA section

ROAD WHEEL

NCH in FA section

BRAKES

NVH in BR section

ON-VEHICLE INSPECTION

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.

SST489B

Checking Neutral Position on Steering Wheel

Pre-checking

Make sure that wheel alignment is correct.

Wheel alignment:

Refer to SDS in FA section

Verify that the steering gear is centered before removing the

steering wheel.

SST490BA

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

1. Rotate steering wheel all the way right and left; measure

turning angle.

Turning angle of full turns:

Refer to SDS in FA section

2. If it is not within specification, check rack stroke.

Rack stroke “S”:

Refer to SDS ( ST-23)

SMA127

SST059B

Checking Gear Housing Movement

1. Check the movement of steering gear housing during station-

ary steering on a dry paved surface.

l Apply a force of 49 N (5 kg, 11 lb) to steering wheel to check

the gear housing movement.

Turn off ignition key while checking.

Movement of gear housing:

±2 mm (±0.08 in) or less

2. If movement exceeds the limit, replace mount insulator after

confirming correct installation of gear housing clamps.

ST-5

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