PS hệ THỐNG TRỢ lực lái NISSAN ALTIMA 2003

HỆ THỐNG TRỢ LỰC LÁI NISSAN ALTIMA ĐỜI 2003

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POWER STEERING SYSTEM

G STEERING

CONTENTS

C

D

E

F

H

I

J

K

L

M

SECTION

A

B

PS

PRECAUTIONS 2

Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TEN-SIONER” 2

Precautions for Steering System 2

PREPARATION 3

Special Service Tools 3

Commercial Service Tool 4

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING 5

NVH Troubleshooting Chart 5

POWER STEERING FLUID 6

Checking Fluid Level 6

Checking Fluid Leakage 6

Bleeding Hydraulic System 6

STEERING WHEEL 7

On-Vehicle service 7

CHECKING STEERING WHEEL PLAY 7

CHECKING NEUTRAL POSITION ON STEER-ING WHEEL 7

CHECKING STEERING WHEEL TURNING FORCE 7

FRONT WHEEL TURNING ANGLE 8

Removal and Installation 8

REMOVAL 8

INSTALLATION 8

STEERING COLUMN 9

Removal and installation 9

Disassembly and Assembly 10

Inspection 11

POWER STEERING GEAR AND LINKAGE 12

On-Vehicle Service 12

CHECKING STEERING GEAR 12

CHECKING STEERING LINKAGE 12

CHECKING GEAR HOUSING MOVEMENT 12

CHECKING RACK SLIDING FORCE 12

REMOVAL 13

DISASSEMBLY 16

INSPECTION AFTER DISASSEMBLY 16

ASSEMBLY 17

Adjustment for Rack Sliding Force 18

DECREASE 18

INCREASE 18

POWER STEERING OIL PUMP 20

On-Vehicle Service 20

CHECKING HYDRAULIC SYSTEM 20

REMOVAL 20

INSTALLATION 20

PRE-DISASSEMBLY INSPECTION 21

DISASSEMBLY 22

ASSEMBLY 22

Inspection After Disassembly 24

HYDRAULIC LINE 25

SERVICE DATA AND SPECIFICATIONS (SDS) 27

General Specifications 27

Steering Wheel 27

Steering Column 27

Power Steering 27

Steering Gear and Linkage 28

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Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used alongwith a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certaintypes of collision This system includes seat belt switch inputs and dual stage front air bag modules The SRSsystem uses the seat belt switches to determine the front air bag deployment, and may only deploy one frontair bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.Information necessary to service the system safely is included in the SRS and SB section of this Service Man-ual

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 formed by an authorized NISSAN/INFINITI dealer.

per-● Improper maintenance, including incorrect removal and installation of the SRS, can lead to sonal injury caused by unintentional activation of the system For removal of Spiral Cable and Air Bag Module, see the SRS section.

per-● Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual SRS wiring harnesses can be identified by yellow and/or orange harness connec- tors.

● 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.

● For easier and proper assembly, place disassembled parts in order on a parts rack.

● Use nylon cloths or paper towels to clean the parts; common shop rags can leave lint that might interfere with their operation.

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

● Before assembly, apply a coat of recommended Genuine NISSAN PSF II or equivalent to hydraulic parts Petroleum jelly 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 tion Perform functional tests whenever designated.

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PS

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Pressure gauge adapter

Measuring oil pressure

ST27180001

(J25726-A)

Steering wheel puller

Removing steering wheel

HT72520000

(J25730-B)

Ball joint remover

Removing ball joint

a: 33 mm (1.30 in) b: 50 mm (1.97 in) r: R11.5 mm (0.453 in)

Rack seal ring reformer

Reforming teflon ring

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Unit: mm (in)

S-NT774

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NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING

B

PS

Use the chart below to help you find the cause of the symptom If necessary, repair or replace these parts

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POWER STEERING FLUID

Check fluid level, referring to the scale on reservoir tank

Check the lines for improper attachment and for leaks, cracks,

dam-age, loose connections, chafing and deterioration

carefully check for fluid leakage

CAUTION:

Do not hold the steering wheel in a locked position for more

than 15 seconds.

Do not overtighten connector as this can damage O-ring, washer and connector

"Inspection After Disassembly"

fluid reservoir tank to the specified level Then quickly turn the

steering wheel fully to right and left and lightly touch steering

stoppers Repeat steering wheel operation until the fluid level no

longer decreases

If this happens, bleed out the air repeating step 2 above Fluid noise may occur in the valve or oil pump This

is common when the vehicle is stationary or while turning the steering wheel slowly This does not affect theperformance or durability of the system

SST476C

WGIA0004E

SST476C

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PS

CHECKING STEERING WHEEL PLAY

Front suspension and axle

Check steering system for looseness while moving the steering

wheel in all directions

CHECKING NEUTRAL POSITION ON STEERING WHEEL

Pre-checking

nuts Turn the tie-rods by the same amount in opposite

direc-tions on both left and right sides

CHECKING STEERING WHEEL TURNING FORCE

Tires need to be inflated to normal pressure

PS-11, "Inspection"

Steering wheel play : 35 mm (1.38 in) or less

Axial end play : 0 mm (0 in)

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STEERING WHEEL

FRONT WHEEL TURNING ANGLE

PS-28, "Steering Gear and Linkage"

REMOVAL

rotated out of position

INSTALLATION

sure that the spiral cable is in the neutral position The neutral

position is detected by turning left 2.5 revolutions from the right

end position and ending with the knob at the top

CAUTION:

The spiral cable may snap due to steering operation if the cable is installed in an improper position Also, with the steering linkage disconnected, the cable may snap by turning the steering wheel beyond the limited number of turns (The spiral cable can be turned up to 2.5 turns from the neutral position to both the right and left.)

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● The rotation of the spiral cable (SRS air bag component part) is limited If the steering gear must

be removed, set the front wheels in the straight-ahead direction Do not rotate the steering column while the steering gear is removed.

● Remove the steering wheel before disconnecting the coupling joint to avoid damaging the spiral cable.

4 Steering wheel side cover 5 Wiper/washer switch 6 Head lamp switch

7 Upper and lower column covers 8 Ignition switch 9 Upper joint

10 Steering column (tilt/telescope type) 11 Lower joint and shaft assembly 12 Cowl panel

WGIA0060E

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● Align slit of the coupling joint with projection on dust cover.

Insert the joint until surface A contacts surface B.

same from the straight-forward position to left and right locks Be sure that the steering wheel is in a tral position when driving straight ahead

SST491C

1 Ignition switch 2 Tamper resistant self-shear bolt 3 Tilt knuckle retainer pin

4 Column shaft with tilt assembly 5 Column tube (tilt/telescope type) 6 O-ring

WGIA0006E

WGIA0009E

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PS

grease Replace the steering column as an assembly, if necessary

nec-essary

rat-tles are heard during a turn, check the length (L) of the column

If out of specification, replace the steering column as an

assem-bly

● Replace the seal and shaft in case of seal edge wear or

damage.

proper operation

CAUTION:

● Do not exert any load or impact in the axial direction

imme-diately before or after column removal.

● After installation check for smooth steering wheel rotation,

without any catches or noise.

● Replace the column if it is depleted of grease, worn,

dam-aged, or if any scratches or coating separation is present

on the shaft seal area.

● The nut on the upper joint may not be reused.

● During lower joint detachment, insert a tool into the yoke groove to prevent gouging damage.

● A washer must be used on all fastener bolts.

Steering column length (L) : 612 - 616 mm

(24.09 - 24.25 in)

SST334C

SST582B

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POWER STEERING GEAR AND LINKAGE

CHECKING STEERING GEAR

leakage

CHECKING STEERING LINKAGE

CHECKING GEAR HOUSING MOVEMENT

Turn off ignition key while checking

CHECKING RACK SLIDING FORCE

slid-ing force is within specification

mm (1.57 in)/s

WGIA0004E

Movement of gear housing : ±2 mm (±0.08 in) or less

Average rack sliding

force

: 210.7 - 298.9 N (21.49 - 30.49 kg-f, 47.37 - 67.19 lb-f)

Maximum force

deviation

: 98 N (10 kg-f, 22 lb-f)

Rack sliding force

Maximum : Not more than 294 N (30 kg-f,

66 lb-f) Maximum devia-

tion

: 147 N (15 kg-f, 33 lb-f)

SST090B

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● Remove the steering wheel and spiral cable before removing the steering lower joint to avoid aging the SRS spiral cable.

4 Gear housing bracket nut 5 Gear housing mounting bolt 6 Gear housing bracket bolt

7 Power steering gear and linkage

assembly

8 Gear housing mounting bolt

WGIA0066E

SFA455BC

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bolts with power tool

gear housing

10 Installation is in the reverse order of removal

high-pressure and low-high-pressure pipe connections Excessive

tight-ening will damage threads of connection or O-ring

install the proper O-ring

LGIA0001E

LGIA0002E

WGIA0043E

WGIA0008E

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B

PS

specification Then tighten further to align nut groove with first

pin hole so that the cotter pin can be installed

CAUTION:

Tightening torque must not exceed 49 N·m (5 kg-m, 36 ft-lb).

Outer tie rod grooved nut : 29 - 39 N·m (3 - 4 kg-m,

22 - 29 ft-lb)

SST824A

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DISASSEMBLY

CAUTION:

Use soft jaws when holding steering gear housing Handle gear housing carefully, as it is made of minum Do not grip cylinder in a vise.

INSPECTION AFTER DISASSEMBLY

Thoroughly clean all parts in cleaning solvent or Genuine NISSAN PSF II or equivalent Blow dry with pressed air

WGIA0010E

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B

PS

Boot

Gear

Inner and outer tie-rods

"Steer-ing Gear and Linkage"

ASSEMBLY

Link-age"

Use Genuine High Temperature, High Strength Thread Locking

CHEMICAL PRODUCTS AND SEALANTS"

Link-age"

and tie-rod with grease

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DECREASE

Decrease rack sliding force as follows:

CAUTION:

● Do not remove adjusting screw.

● Steering gear must replaced if adjusting screw is removed or loosended more than two tions.

force is within specification

NOTE:

Steering gear must replaced if adjusting screw rotation torque is

less than 5.0N·m (0.9 kg-m, 44in-lb)

Maximum force

deviation

: 98 N (10 kg-f, 22 lb-f)

LGIA0018E

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B

PS

CAUTION:

● Do not remove adjusting screw.

● Steering gear must replaced if adjusting screw is

removed or loosended more than two rotations.

force is within specification

NOTE:

Steering gear must replaced if adjusting screw rotation torque is

less than 5.0N·m (0.9 kg-m, 44in-lb)

LGIA0019E

Average rack

slid-ing force

: 210.7 - 298.9 N (21.49 - 30.49 kg-f, 47.37 - 67.19 lb-f)

Maximum force

deviation

: 98 N (10 kg-f, 22 lb-f)

LGIA0018E

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POWER STEERING OIL PUMP

CHECKING HYDRAULIC SYSTEM

Before starting, check belt tension, driving pulley and tire pressure

"Bleeding Hydraulic System"

WARNING:

Warm up engine with shut-off valve fully opened If engine

is started with shut-off valve closed, fluid pressure in oil

pump increases to maximum This will raise oil temperature

abnormally.

positions with engine idling at 1,000 rpm

CAUTION:

Do not hold the steering wheel in a locked position for more than 15 seconds.

● If pressure reaches maximum operating pressure, system is OK.

● If pressure increases above maximum operating pressure, check power steering pump flow control valve Refer to PS-27, "Power Steering"

check pressure again

CAUTION:

Do not close shut-off valve for more than 15 seconds.

● If pressure increases to maximum operating pressure, gear is damaged Refer to PS-13,

"Removal and Installation"

● If pressure remains below maximum operating pressure, pump is damaged Refer to PS-20,

"Removal and Installation"

REMOVAL

INSTALLATION

Installation is in the reverse order of removal

Oil pump maximum standard pressure : 8,000 - 8,800 kPa (82 - 90 kg/cm, 1,160 - 1,276 psi)

SST834-F

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B

PS

PRE-DISASSEMBLY INSPECTION

Disassemble the power steering oil pump only if the following items are found

25 Power steering pump bracket

WGIA0044E

SST984A

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DISASSEMBLY

CAUTION:

● Parts which can be disassembled are strictly limited Never disassemble parts other than those specified.

● Disassemble in as clean a place as possible.

● Clean your hands before disassembly.

● Do not use rags; use nylon cloths or paper towels.

● Follow the procedures and cautions in the Service Manual.

● When disassembling and reassembling, do not let foreign matter enter or contact the parts.

Be careful not to drop drive shaft

Be careful not to damage front housing

Be careful not to drop flow control valve

PS-24, "Inspection After Disassembly"

ASSEMBLY

Assembly is in the reverse order of disassembly, noting the following instructions

SST010B

SST034A

SST036A

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B

PS

neces-sary

must face cam ring side

SST038A

WST031

SST843A

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plate Then install cam ring 3 as shown

Cam ring : D 1 is less than D 2

WST035

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PS

All except VQ35DE with A/T

WGIA0011E

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HYDRAULIC LINEVQ35DE with A/T only

WGIA0017E

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SERVICE DATA AND SPECIFICATIONS (SDS)

B

PS

SST855C

Steering wheel turning force

(Measured at one full turn from the neutral position) N (kg-f, lb-f) 39 (4, 9) or less

Oil pump maximum pressure kPa (kg/cm2 , psi) (82 - 90, 1,160 - 1,276)8,000 - 8,800

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SERVICE DATA AND SPECIFICATIONS (SDS)

Tie-rod outer ball joint

Swinging force at cotter pin hole: “A” N

Rotating torque: “B” N-m (kg-cm, in-lb) 0.29 - 2.94 (3.0 - 30.0, 2.6 - 26.0)

Tie-rod inner ball joint Swinging force*: “A” N (kg-f, lb-f) 5.69 - 45.60 (0.58 - 4.65, 1.28 - 10.25)

Initial tightening torque N·m (kg-cm, in-lb) 4.9 - 5.9 (50 - 60, 43 - 52)

Retightening torque after loosening N·m

Tightening torque after gear has settled N·m (kg-cm, in-lb) 4.9 - 5.9 (50 - 60, 43 - 52)

Rack sliding force N (kg-f,

Average force 210.7 - 298.9 (21.49 -

30.49, 47.37 - 67.19)

Maximum force

Except for the above range

Maximum sliding force 294 (30, 66)

Maximum force

SST468C

SST867C

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