Infiniti QX4 (R50). Manual - part 500

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

NBMA0001

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 QX4 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 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 must be performed
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 covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.

PRECAUTIONS

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

MA-2

Special Service Tool

NBMA0002

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

Tool number
(Kent-Moore No.)
Tool name

Description

KV10115801
(J38956)
Oil filter cap wrench

NT375

Removing oil filter
a: 64.3 mm (2.531 in)

Commercial Service Tool

NBMA0041

Tool name
(Kent-Moore No.)

Description

Belt tension gauge
(BT3373-F)

AMA126

Checking drive belt tension

IDX

PREPARATION

Special Service Tool

MA-3

NBMA0003

General maintenance includes those items which should be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. The owners can perform
checks and inspections themselves or they can have their INFINITI dealers do them.
OUTSIDE THE VEHICLE

The maintenance items listed here should be performed from time to time, unless otherwise specified.

Item

Reference page

Tires

Check the pressure with a gauge periodically when at a service station,
including the spare, and adjust to the specified pressure if necessary. Check
carefully for damage, cuts or excessive wear.

—

Wheel nuts

When checking the tires, make sure no nuts are missing, and check for any
loose nuts. Tighten if necessary.

—

Tire rotation

Tires should be rotated every 12,000 km (7,500 miles).

MA-24

Wheel alignment and
balance

If the vehicle pulls to either side while driving on a straight and level road, or
if you detect uneven or abnormal tire wear, there may be a need for wheel
alignment. If the steering wheel or seat vibrates at normal highway speeds,
wheel balancing may be needed.

MA-24, SU-6, “Front

Wheel Alignment”

Windshield wiper
blades

Check for cracks or wear if they do not wipe properly.

—

Doors and engine
hood

Check that all doors and the engine hood operate smoothly as well as the
trunk lid and back hatch. Also make sure that all latches lock securely. Lubri-
cate if necessary. Make sure that the secondary latch keeps the hood from
opening when the primary latch is released.
When driving in areas using road salt or other corrosive materials, check
lubrication frequently.

MA-27

INSIDE THE VEHICLE

The maintenance items listed here should be checked on a regular basis, such as when performing periodic maintenance, cleaning the
vehicle, etc.

Item

Reference page

Lamps

Make sure that the headlamps, stop lamps, tail lamps, turn signal lamps, and
other lamps are all operating properly and installed securely. Also check
headlamp aim.

—

Warning lamps and
buzzers/chimes

Make sure that all warning lamps and buzzers/chimes are operating properly.

—

Windshield wiper
and washer

Check that the wipers and washer operate properly and that the wipers do
not streak.

—

Windshield defroster

Check that the air comes out of the defroster outlets properly and in sufficient
quantity when operating the heater or air conditioning.

—

Steering wheel

Check that it has the specified play. Be sure to check for changes in the
steering condition, such as excessive play, hard steering or strange noises.
Free play: Less than 35 mm (1.38 in)

—

Seats

Check seat position controls such as seat adjusters, seatback recliner, etc. to
make sure they operate smoothly and that all latches lock securely in every
position. Check that the head restrains move up and down smoothly and that
the locks (if equipped) hold securely in all latched positions. Check that the
latches lock securely for folding-down rear seatbacks.

—

Seat belts

Check that all parts of the seat belt system (e.g. buckles, anchors, adjusters
and retractors) operate properly and smoothly and are installed securely.
Check the belt webbing for cuts, fraying, wear or damage.

MA-28, RS-7, “Seat Belt

Inspection”

Brakes

Check that the brake does not pull the vehicle to one side when applied.

—

GENERAL MAINTENANCE

MA-4

Item

Reference page

Brake pedal and
booster

Check the pedal for smooth operation and make sure it has the proper dis-
tance under it when depressed fully. Check the brake booster function. Be
sure to keep floor mats away from the pedal.

BR-14, “Brake Pedal and

Bracket” and BR-19,

“Brake Booster”

Parking brake

Check that the lever has the proper travel and make sure that the vehicle is
held securely on a fairly steep hill when only the parking brake is applied.

BR-31, “Parking Brake

Control”

Automatic transmis-
sion “Park” mecha-
nism

Check that the lock release button on the selector lever operates properly
and smoothly. On a fairly steep hill check that the vehicle is held securely
with the selector lever in the “P” position without applying any brakes.

—

UNDER THE HOOD AND VEHICLE

The maintenance items listed here should be checked periodically (e.g. each time you check the engine oil or refuel).

Item

Reference page

Windshield washer
fluid

Check that there is adequate fluid in the tank.

—

Engine coolant level

Check the coolant level when the engine is cold.

MA-15

Radiator and hoses

Check the front of the radiator and clean off any dirt, insects, leaves, etc.,
that may have accumulated. Make sure the hoses have no cracks,
deformation, deterioration or loose connections.

—

Brake fluid levels

Make sure that the brake fluid levels are between the “MAX” and “MIN” lines
on the reservoir.

MA-25

Battery

Check the fluid level in each cell. It should be between the “MAX” and “MIN”
lines.

—

Engine drive belts

Make sure that no belt is frayed, worn, cracked or oily.

MA-13

Engine oil level

Check the level on the dipstick after parking the vehicle on a level spot and
turning off the engine.

MA-18

Power steering fluid
level and lines

Check the level on the dipstick with the engine off. Check the lines for
improper attachment, leaks, cracks, etc.

MA-27

Automatic transmis-
sion fluid level

Check the level on the dipstick after putting the selector lever in “P” with the
engine idling.

MA-21

Exhaust system

Make sure there are no loose supports, cracks or holes. If the sound of the
exhaust seems unusual or there is a smell of exhaust fumes, immediately
locate the trouble and correct it.

MA-21

Underbody

The underbody is frequently exposed to corrosive substances such as those
used on icy roads or to control dust. It is very important to remove these
substances, otherwise rust will form on the floor pan, frame, fuel lines and
around the exhaust system. At the end of winter, the underbody should be
thoroughly flushed with plain water, being careful to clean those areas where
mud and dirt can easily accumulate.

—

Fluid leaks

Check under the vehicle for fuel, oil, water or other fluid leaks after the
vehicle has been parked for a while. Water dripping from the air conditioner
after use is normal. If you should notice any leaks or gasoline fumes are
evident, check for the cause and correct it immediately.

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GENERAL MAINTENANCE

MA-5

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