Infiniti QX56 (Z62). Manual - part 130

PRECAUTIONS

BRC-5

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PRECAUTION

PRECAUTIONS

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

INFOID:0000000006228174

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

INFOID:0000000006228175

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.

BRC-6

< PRECAUTION >

[WITH VDC]

PRECAUTIONS

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 Procedure without Cowl Top Cover

INFOID:0000000006228176

When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.

Precaution for Brake System

INFOID:0000000006222556

WARNING:

Clean any dust from the front brake and rear brake using a vacuum dust collector. Never blow by com-
pressed air.
• Brake fluid use refer to 

MA-10, "Fluids and Lubricants"

.

• Never reuse drained brake fluid.
• Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it off

immediately and wash with water if it gets on a painted surface.

• Always confirm the specified tightening torque when installing the brake pipes.
• After pressing the brake pedal more deeply or harder than normal driving, such as air bleeding, check each

item of brake pedal. Adjust brake pedal if it is outside the standard value.

• Never use mineral oils such as gasoline or light oil to clean. They may damage rubber parts and cause

improper operation.

• Always loosen the brake tube flare nut with a flare nut wrench.
• Tighten the brake tube flare nut to the specified torque with a crow-

foot (A) and torque wrench (B).

• Always connect the battery terminal when moving the vehicle.
• Turn the ignition switch OFF and disconnect the ABS actuator and

electric unit (control unit) harness connector or the battery negative
terminal before performing the work.

• Check that no brake fluid leakage is present after replacing the

parts.

Precaution for Brake Control System

INFOID:0000000006222557

• Slight vibrations are felt on the brake pedal and the operation noises occur, when VDC function, TCS func-

tion, ABS function, EBD function, hill start assist function or brake limited slip differential (BLSD) function
operates. This is not a malfunction because it is caused by VDC function, TCS function, ABS function, EBD
function, hill start assist function or brake limited slip differential (BLSD) function that is normally operated.

• When starting engine or when starting vehicle just after starting engine, brake pedal may vibrate or motor

operating noise may be heard from engine compartment. This is normal condition.

• Brake stopping distance may become longer than models without ABS function depending on the road con-

ditions, when ABS function is operated on slippery road like rough road, gravel road or snowy road.

• When a malfunction is indicated, always collect information from the customer about conditions of occur-

rence, estimate cause and perform operation. Check brake booster operation, brake fluid level and brake
fluid leakage, as well as electrical system.

• The optimum performance is achieved by control for VDC function, TCS function, ABS function, EBD func-

tion, hill start assist function or brake limited slip differential (BLSD) function when all of brakes, suspensions

PIIB3706J

JPFIA0001ZZ

PRECAUTIONS

BRC-7

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[WITH VDC]

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and tires installed on the vehicle are the specified size and parts. Brake performance and controllability may
be negatively affected when other parts than the specified are installed.

• Brake stopping distance may become longer and steering stability may be negatively affected, when tires in

different size and combination or other parts than the specified are used.

• When a radio (including wiring), antenna and antenna lead line are located near ABS actuator and electric

unit (control unit), a malfunction or improper operation may occur for the control of VDC function, TCS func-
tion, ABS function, EBD function, hill start assist function or brake limited slip differential (BLSD) function.

• When the following items are replaced by other parts than genuine parts or modified, ABS warning lamp,

brake warning lamp and VDC warning lamp may turn ON, and the control may not operate normally for VDC
function, TCS function, ABS function, EBD function, hill start assist function or brake limited slip differential
(BLSD) function.

- Suspension component parts (shock absorber, spring, bushing and others)
- Tire and wheel (other than the specified size)
- Brake component parts (brake pad, disc rotor, brake caliper and others)
- Engine component parts (ECM, muffler and others)
- Body reinforcement component parts (rollover bar, tower bar and others)
• When suspension, tire and brake component parts are excessively worn or deteriorated and the vehicle is

driven, ABS warning lamp, brake warning lamp and VDC warning lamp may turn ON, and the control may
not operate normally for VDC function, TCS function, ABS function, EBD function, hill start assist function or
brake limited slip differential (BLSD) function.

• ABS warning lamp, brake warning lamp and VDC warning lamp may turn ON, when only front wheel or rear

wheel is rotated using a free roller. This is not a malfunction, because it is caused by wheel speed difference
between wheel that is rotated and wheel that is not rotated. In this case, perform self-diagnosis, check self-
diagnosis results, and erase memory.

• When power supply voltage is not normal, ABS warning lamp, brake warning lamp and VDC warning lamp

turn ON. ABS actuator and electric unit (control unit) stops control for VDC function, TCS function, ABS func-
tion, EBD function, hill start assist function or brake limited slip differential (BLSD) function. Ordinary brake
operates. After power supply returns to normal, ABS warning lamp, brake warning lamp and VDC warning
lamp turn OFF. The control becomes operative for VDC function, TCS function, ABS function, EBD function,
hill start assist function or brake limited slip differential (BLSD) function.

• VDC warning lamp may turn ON and VDC function or TCS function may not normally operate, when driving

on a special road the is extremely slanted (bank in a circuit course). This is not a malfunction if the status
returns to normal for VDC function or TCS function after the engine is started again. In this case, perform
self-diagnosis, check self-diagnosis results, and erase memory.

• A malfunction in yaw rate/side/decel G sensor system may be detected when the vehicle sharply turns dur-

ing a spin turn, acceleration turn or drift driving while VDC function or TCS function are OFF (VDC OFF
switch is pressed and VDC OFF indicator lamp is in ON status). This is not a malfunction if the status returns
to normal for VDC function or TCS function after the engine is started again. In this case, perform self-diag-
nosis, check self-diagnosis results, and erase memory

Precaution for Harness Repair

INFOID:0000000006222558

• Solder the repair part, and wrap it with tape. [Twisted wire fray

must be 110 mm (4.33 in) or less.]

SKIB8766E

BRC-8

< PRECAUTION >

[WITH VDC]

PRECAUTIONS

• Never bypass the repair point with wire. (If it is bypassed, the turn-

out point cannot be separated and the twisted wire characteristics
are lost.)

SKIB8767E