Infiniti QX56 (Z62). Manual - part 1192

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< PRECAUTION >

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

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The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air 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 AIR BAG” and “SEAT BELT” 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 that would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.

• 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 harnesses or har-
ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precaution Necessary for Steering Wheel Rotation after Battery Disconnect

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NOTE:
• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-

tion, then disconnect both battery cables.

• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both

battery cables.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.

For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.

OPERATION PROCEDURE

1.

Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.

2.

Turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)

3.

Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.

4.

Perform the necessary repair operation.

PRECAUTIONS

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5.

When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)

6.

Perform self-diagnosis check of all control units using CONSULT-III.

Precaution for Battery Service

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Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.

Occupant Classification System

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• Replace occupant classification system control unit and passenger front seat cushion as an assembly.

Refer to 

SE-105, "Exploded View"

.

Service

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• Never use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3

minutes.
For approximately 3 minutes after the battery negative terminal is removed, it is still possible for the air bag
and seat belt pre-tensioner to deploy. Therefore, never work on any SRS connectors or wires until at least 3
minutes have elapsed.

• Diagnosis sensor unit must always be installed with their arrow marks “

⇐

” pointing towards the front of the

vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities, or rust before installa-
tion and replace as required.

• The spiral cable must be aligned in the neutral position since its rotations are limited. Never turn steering

wheel and column after removal of steering gear.

• Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad side

facing upward and seat mounted front side air bag module standing with the stud bolt side facing downward.

• Perform self-diagnosis to check entire SRS for proper function after replacing any components.
• After air bag deploys, the front instrument panel assembly should be replaced if damaged.
• Always replace instrument panel pad following front passenger air bag deployment.

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< PREPARATION >

PREPARATION

PREPARATION

PREPARATION

Commercial Service Tools

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Tool name

Description

Tamper resistant TORX bit

Removes driver air bag module and/or Air bag 
diagnosis sensor unit

Remover tool

Removes clips, pawls, and metal clips

S-NT757

JMKIA3050ZZ

COLLISION DIAGNOSIS

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< BASIC INSPECTION >

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BASIC INSPECTION

COLLISION DIAGNOSIS

FOR FRONTAL COLLISION

FOR FRONTAL COLLISION : When SRS is activated in a collision

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CAUTION:

Due to varying models and option levels, not all parts listed in the chart below apply to all vehicles.

WORK PROCEDURE

1.

Before performing any of the following steps, ensure that all vehicle body and structural repairs have been
completed.

2.

Replace the diagnosis sensor unit.

3.

Remove the front air bag modules, crash zone sensor, bracket and seat belt pre-tensioner assemblies.

4.

Check the SRS components using the table below:
Replace any SRS components showing visible signs of damage. (dents, cracks and deformation, etc.)

5.

Install new front air bag modules, crash zone sensor assembly, bracket and seat belt pre-tensioner
assemblies.

6.

Perform self-diagnosis using CONSULT-III or air bag warning lamp. Refer to 

SRC-14, "Description"

 for

details. Ensure entire SRS operates properly.

7.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to

SRC-14, "Description"

.

SRS INSPECTION (FOR FRONTAL COLLISION)

Part

Inspection

Driver air bag module

If the driver air bag has deployed:
REPLACE
Install with new fasteners.

Front passenger air bag module 
(if equipped)

If the front passenger air bag has deployed:
REPLACE
Install with new fasteners.

Crash zone sensor

If any of the front air bags or seat belt pre-tensioners* have been activated:
REPLACE the crash zone sensor and bracket with new fasteners.
*: Confirm seat belt pre-tensioner activation using CONSULT-III only.

Seat belt pre-tensioner assem-
blies
(All applicable locations: buckle, 
retractor, lap outer)

If either the driver or passenger seat belt pre-tensioner* has been activated:
REPLACE all seat belt pre-tensioner assemblies with new fasteners.
*: Confirm seat belt pre-tensioner activation using CONSULT-III only.

Diagnosis sensor unit

If any of the SRS components have been activated:
REPLACE the diagnosis sensor unit.
Install with new fasteners.

Steering wheel

1.

Visually check steering wheel for deformities.

2.

Check harness (built into steering wheel) and connectors for damage, and terminals for defor-
mities.

3.

Install driver air bag module into the steering wheel to check fit and alignment with the wheel.

4.

Check steering wheel for excessive free play.

5.

If no damage is found, reinstall.

6.

If damaged 

−

 REPLACE.

Spiral cable

If the driver front air bag has deployed:
REPLACE the spiral cable.

Occupant classification system 
(Passenger seat)

1.

Remove passenger seat assembly.

2.

Check control unit case for dents, cracks of deformities.

3.

Check connectors and pressure sensor tube for damage, and terminals for deformities.

4.

Check seat frame and cushion pan for dents or deformities.

5.

If no damage is found, reinstall seat with new fasteners.

6.

If damaged 

−

 REPLACE seat cushion assembly with new fasteners.