Content .. 535 536 537 538 ..

Infiniti Q45 (FY33). Manual - part 537

Part

Side air bag is acti-

vated

SRS is NOT activated

Seat belt pre-ten-
sioner assembly

1. Check if the seat belt can be extended smoothly.

If the seat belt cannot be extended smoothly.
- Check for deformities of the center pillar inner.

- If the center pillar inner has no damage, REPLACE the seat belt pre-tensioner assembly.

2. Remove the seat belt pre-tensioner assembly on the collision side. Check harness cover and connectors

for damage, terminals for deformities, and harness for binding.

3. Check for visible signs of damage (dents, cracks, deformation) of the seat belt pre-tensioner assembly.
4. If no damage is found, reinstall the seat belt pre-tensioner assembly with new bolts coated with bonding

agent.

5. If damaged—REPLACE the seat belt pre-tensioner assembly with new bolts coated with bonding agent.

The seat belt pre-tensioner assembly must be deployed before disposing of it.

Seat with built-in
type side air bag

REPLACE all parts
of seat back (includ-
ing seat back frame)

1. Visually check the seat on the collision side.
2. Remove the seat on the collision side and check the following for damage and

deformities.

Harness, connectors and terminals

Frame and recliner, and also adjuster and slides

3. If no damage is found, reinstall the seat.
4. If damaged—REPLACE the damaged seat parts with new bolts.

Center pillar inner

1. Check the center pillar inner on the collision side for damage (dents, cracks, deformation).
2. If damaged—REPAIR the center pillar inner.

Trim

1. Check for visible signs of damage (dents, cracks, deformation) of the interior trim on the collision side.
2. If damaged—REPLACE the damaged trim parts.

IDX

COLLISION DIAGNOSIS

RS-63

NOTES

STEERING SYSTEM

SECTION

CONTENTS

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

Supplemental Restraint System (SRS)

SEAT BELT PRE-TENSIONER

″

...............2

Precautions for Steering System.................................2
Special Service Tools ..................................................3
Commercial Service Tools ...........................................4

NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING .....................................................5

NVH Troubleshooting Chart.........................................5

ON-VEHICLE SERVICE ..................................................6

Checking Steering Wheel Play....................................6
Checking Neutral Position on Steering Wheel ............6
Front Wheel Turning Angle..........................................6
Checking Gear Housing Movement ............................7
Adjusting Rack Retainer ..............................................7
Checking and Adjusting Drive Belts (For power
steering) .......................................................................7
Checking Fluid Level ...................................................7
Checking Fluid Leakage ..............................................8
Bleeding Hydraulic System..........................................8
Checking Steering Wheel Turning Force (For
power steering) ............................................................9
Checking Hydraulic System.........................................9

STEERING WHEEL AND STEERING COLUMN.......... 11

Removal..................................................................... 11

Installation..................................................................12
Disassembly and Assembly.......................................13
Inspection...................................................................14

POWER STEERING GEAR AND LINKAGE ................15

Removal and Installation ...........................................15
Disassembly...............................................................18
Inspection...................................................................18
Assembly ...................................................................20
Adjustment .................................................................25

POWER STEERING OIL PUMP....................................27

Pre-disassembly Inspection.......................................27
Disassembly...............................................................27
Inspection...................................................................28
Assembly ...................................................................28

TWIN ORIFICE POWER STEERING SYSTEM ............30

Hydraulic Circuit.........................................................30
Wiring Diagram ..........................................................31

TWIN ORIFICE POWER STEERING SYSTEM -
Trouble Diagnoses .......................................................33

Precautions ................................................................33
Diagnostic Procedure ................................................34
Control Unit Inspection Table ....................................37

SERVICE DATA AND SPECIFICATIONS (SDS) ..........38

General Specifications...............................................38
Inspection and Adjustment ........................................38

IDX

Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to INFINITI Q45 is as follows:

For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.

For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring
harness, warning lamp (one of components of air bags for a frontal collision).

Information necessary to service the system safely is included in the RS section of this Service Manual.

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 should be per-
formed by an authorized INFINITI dealer.

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

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses (except satellite sensor and side air bag mod-
ule) covered with yellow insulation tape either just before the harness connectors or for the com-
plete harness are related to the SRS.

Precautions for 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.

Place disassembled parts in order, on a parts rack, for easier and proper assembly.

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. 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.

PRECAUTIONS AND PREPARATION

ST-2

Content .. 535 536 537 538 ..