or remote keyless entry or by opening/closing the driver side door. In addition, ACC power is supplied even
after the ignition switch is turned to the OFF position, i.e. ACC power is supplied for a certain fixed time.

• When disconnecting the 12V battery terminal, turn off the ACC

power before disconnecting the 12V battery terminal, observing
“How to disconnect 12V battery terminal” described below.
NOTE:
Some ECUs operate for a certain fixed time even after ignition
switch is turned OFF and ignition power supply is stopped. If the
battery terminal is disconnected before ECU stops, accidental DTC
detection or ECU data damage may occur.

• For vehicles with the 2-batteries, be sure to connect the main bat-

tery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of
main battery and sub battery disconnected, then DTC may be detected.

• After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.

NOTE:
The removal of 12V battery may cause a DTC detection error.

HOW TO DISCONNECT 12V BATTERY TERMINAL

Disconnect 12V battery terminal according to Instruction 1 or Instruction 2 described below.
For vehicles parked by ignition switch OFF, refer to Instruction 2.

INSTRUCTION 1

Open the hood.

Turn key switch to the OFF position with the driver side door opened.

Get out of the vehicle and close the driver side door.

Wait at least 3 minutes. For vehicle with the engine listed below, remove the battery terminal after a lapse
of the specified time.

CAUTION:

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

INSTRUCTION 2 (FOR VEHICLES PARKED BY IGNITION SWITCH OFF)

Unlock the door with intelligent key or remote keyless entry.
NOTE:
At this moment, ACC power is supplied.

Open the driver side door.

Open the hood.

Close the driver side door.

Wait at least 3 minutes.

SEF289H

D4D engine

: 20 minutes

HRA2DDT

: 12 minutes

K9K engine

: 4 minutes

M9R engine

: 4 minutes

R9M engine

: 4 minutes

V9X engine

: 4 minutes

SRC-4

< PRECAUTION >

PRECAUTIONS

CAUTION:

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000010506944

CAUTION:

Comply with the following cautions to prevent any error and malfunction.
• Before removing and installing any control units, first turn the ignition power source and accessory

power source to the OFF, 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 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

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

Open driver door.

Turn the ignition switch to the ON position.
(At this time, the steering lock will be released.)

Turn the ignition switch to OFF position with driver door open.

Wait for 3 minutes or longer with driver door open.
NOTE:
• Do not close driver door because the steering wheel locks when driver door is closed.
• The auto acc function is adapted to this vehicle. For this reason, even when the ignition switch is turned

to OFF position, the accessory power source does not turned OFF and continues to be supplied for a
certain amount of time.

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

Perform the necessary repair operation.

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

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

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

INFOID:0000000010434386

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. Information necessary to service the system safely is included in the “SRS AIR BAG” and
“SEAT BELT” of this Service Manual.

WARNING:

Always observe the following items for preventing accidental activation.
• 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.

PRECAUTIONS

SRC-5

< PRECAUTION >

SRC

• 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 “SRS AIR BAG”.

• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-

vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.

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

WARNING:

Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, never 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.

Service

INFOID:0000000010377815

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

or more.
For approximately 3 minutes after the cables are 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
passed.

• 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 with 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 down.

• Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
• After air bag inflates, the front instrument panel assembly should be replaced if damaged.
• Always replace instrument panel pad following front passenger air bag deployment.
• Never solder the harness when making repairs. Check that harness is not pinched and that there is no con-

tact with other components.

• Never allow harness to come in contact with oil, grease, waste oil, or water.
• Never insert foreign materials, such as a screwdriver, into the harness connector. (This is to prevent acci-

dental activation caused by static electricity.)

• Always use CONSULT or SRS air bag warning lamp to perform the circuit diagnosis. (Never use an electric

tester such as a circuit tester.)

SRC-6

< SYSTEM DESCRIPTION >

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000010377816

JMHIA2895ZZ

COMPONENT PARTS

SRC-7

< SYSTEM DESCRIPTION >

SRC

Driver air bag module

INFOID:0000000010513108

• Driver air bag module is built into steering wheel.
• Driver air bag module mainly consists of air bag

and inflator

which inflates air bag.

Behind center pillar lower garnish
RH

View with steering wheel removed

View with center console assembly

Behind center pillar lower garnish LH

No.

Component

Function

Curtain air bag module RH

Refer to

SRC-9, "Curtain air bag module"

Side air bag module RH

Refer to

SRC-8, "Side air bag module"

Driver air bag module

Refer to

SRC-7, "Driver air bag module"

Combination meter (air bag warning lamp)

Refer to

SRC-12, "Air bag warning lamp"

Indicator unit

Front passenger air bag OFF
indicator

Refer to

SRC-13, "Front Passenger Air Bag Off Indicator"

Front passenger air bag ON
indicator

Refer to

SRC-13, "Front Passenger Air Bag On Indicator"

Crash zone sensor

Refer to

SRC-11, "Crash zone sensor"

Passenger air bag module

Refer to

SRC-8, "Passenger air bag module"

Air bag cutoff switch

Deactivates passenger air bag module deployment by switch-
ing air bag cut OFF switch to the OFF position.

Side air bag module LH

Refer to

SRC-8, "Side air bag module"

Curtain air bag module LH

Refer to

SRC-9, "Curtain air bag module"

Lap pre-tensioner RH

Refer to

SRC-10, "Double pre-tensioner seat belt"

Seat belt pre-tensioner RH

Refer to

SRC-9, "Seat belt pre-tensioner with Load limiter"

Satellite sensor RH

Refer to

SRC-12, "Satellite sensor"

Combination switch (spiral cable)

Refer to

SRC-11, "Spiral cable"

Air bag diagnosis sensor unit

Refer to

SRC-12, "Air bag diagnosis sensor unit"

Seat belt pre-tensioner LH

Refer to

SRC-9, "Seat belt pre-tensioner with Load limiter"

Lap pre-tensioner LH

Refer to

SRC-10, "Double pre-tensioner seat belt"

Satellite sensor LH

Refer to

SRC-12, "Satellite sensor"

JMHIA1121ZZ

SRC-8

< SYSTEM DESCRIPTION >

COMPONENT PARTS

• Driver air bag inflates by breaking steering wheel center pad sur-

face .

Passenger air bag module

INFOID:0000000010513109

• Passenger air bag module is built into instrument panel.
• Passenger air bag module mainly consists of air bag

and inflator

which inflates air bag.

• Passenger air bag inflates by breaking instrument panel surface

Side air bag module

INFOID:0000000010513110

• Side air bag module is built into seatback side.
• Side air bag module mainly consists of air bag

and inflator

which inflates air bag.

JMHIA2480ZZ

JMHIA0155ZZ

JMHIA2207ZZ

NNHIA0030ZZ

COMPONENT PARTS

SRC-9

< SYSTEM DESCRIPTION >

SRC

• Identification mark

is installed to seatback side stitch indicating

that side air bag is equipped.

• Side air bag inflates through seatback side stitch

Curtain air bag module

INFOID:0000000010513111

• Curtain air bag module is built into roof side portion LH and RH.
• Curtain air bag module mainly consists of air bag

and inflator

which inflates air bag.

• Identification mark

is installed to center pillar upper garnish upper indicating that SRS curtain air bag is

equipped.

• Curtain air bag inflates through a space

between headliner and roof side portion.

Seat belt pre-tensioner with Load limiter

INFOID:0000000010513117

DESCRIPTION

The seat belt system is equipped with pre-tensioner mechanism, load limiter mechanism, and ELR mecha-
nism (front seat passenger restraint mechanism).

STRUCTURE

JMHIA2237ZZ

JMHIA2866ZZ

JMHIA2867ZZ

SRC-10

< SYSTEM DESCRIPTION >

COMPONENT PARTS

PRE-TENSIONER MECHANISM

• In a frontal collision that exceeds the specified limit, air bag sensor

unit detects the collision, transmits an electrical signal to gas gen-
erator

in manifold case, and activates gas generator. Gas is

generated.

• The pressure of the generated gas moves the ball

inside of pipe

. The ball then presses ring gear

which is engaged to the pin-

ion gear

• The rotation of the ring gear rotates the shaft

in the retracting

direction of the seat belt. Seat belt is retracted.

LOAD LIMITER (ELR) MECHANISM

• In a collision, when ELR shaft

is locked, a load caused by

impact is applied to webbing

• When a load is continuously applied to webbing and reaches or

exceeds the specified level, a rotating force is applied to ELR shaft
that is engaged to lock portion

and bobbin

. ELR shaft twists.

• As ELR shaft is twisted, webbing is pulled out while keeping a cer-

tain level of tension and easing the impact to the chest of front seat
passenger.

Double pre-tensioner seat belt

INFOID:0000000010513118

DESCRIPTION

The system combines lap pre-tensioner mechanism for lumbar seat belt and pre-tensioner seat belt with load
limiter. The system upgrades passenger restraint by reducing lumbar movement during a frontal collision.

LAP PRE-TENSIONER MECHANISM

• In a frontal collision that exceeds the specified limit, air bag sensor unit detects the collision, transmits an

electrical signal to gas generator

in pipe, and activates gas generator. Gas is generated. The pressure of

the generated gas moves the piston inside of pipe toward pipe front direction, and retracts wire.

• Lap anchor is installed to end of the wire and end of seat belt is connected to lap anchor. The wire therefore

retracts seat belt.

ELR shaft (torsion bar)

Bobbin

Manihold case

Lock portion

Ring gear

Pinion gear

Gas generator

Spring

Ball

Pipe

Pre-tensioner mechanism cross sec-
tion

ELR mechanism portion cross sec-
tion

Pre-tensioner mechanism portion

Load limiter portion

JMHIA0167ZZ

JMHIA0168ZZ

JMHIA0169ZZ

COMPONENT PARTS

SRC-11

< SYSTEM DESCRIPTION >

SRC

• When piston stops, clutch mechanism integrated to piston prevents piston from moving in the original direc-

tion. Wire and lap anchor therefore remain in the retracted status.

Spiral cable

INFOID:0000000010513112

• Spiral cable electrically connects air bag diagnosis sensor unit and

driver air bag module. Spiral cable mainly consists of the rotating
portion

which performs the same movement as steering wheel,

the fixed case

which is installed on steering wheel, and the

cable which connects the rotating portion.

• Spiral cable is built into steering angle sensor which is installed to

a space between combination switch and steering wheel.

Crash zone sensor

INFOID:0000000010513113

• Crush zone sensor

is located in front of the radiator. Crash zone

sensor integrates frontal collision “G” sensor which detects frontal
collision impact that exceeds the specified limit of the vehicle.

• In a frontal collision that exceeds the specified limit of the vehicle,

crush zone sensor detects impact. If frontal collision safing sensor
in air bag diagnosis sensor unit judges that impact is due to a colli-
sion, driver air bag, passenger air bag and seat belt pre-tensioner
operate.

Gas generator

Wire

Piston

Pipe

Lap anchor

Seat belt

PHIA1226J

NNHIA0038ZZ

JMHIA2871ZZ

SRC-12

< SYSTEM DESCRIPTION >

COMPONENT PARTS

Satellite sensor

INFOID:0000000010513114

• Satellite sensor in installed to center pillar lower portion of front

seat belt retractor front side.

• Satellite sensor integrates lateral collision “G” sensor which

detects lateral collision impact that exceeds the specified limit of
the vehicle. (Lateral collision “G” sensor adopts electronic sensor
of which operating principles are the same as those of frontal colli-
sion “G” sensor in air bag diagnosis sensor unit.)

• In a lateral collision that exceeds the specified limit of the vehicle,

satellite sensor detects impact. If lateral collision safing sensor in
air bag diagnosis sensor unit judges that impact is due to a colli-
sion, side air bag and curtain air bag operate.

Air bag diagnosis sensor unit

INFOID:0000000010513115

• Air bag diagnosis sensor unit

is installed to front seat center por-

tion (under center console). Air bag diagnosis sensor unit inte-
grates control functions of driver air bag, passenger air bag, side
air bag, curtain air bag, and seat belt pre-tensioner.

• Air bag diagnosis sensor unit integrates frontal collision “G” sensor,

frontal collision safing sensor, and lateral collision safing sensor
(only for models with curtain air bag).

• Air bag diagnosis sensor unit has a function that judges impact due

to frontal and lateral collisions exceeding the specified limit of the
vehicle. Air bag diagnosis sensor unit also has an auxiliary power
supply function that supplements battery power supply in the event battery is damaged in a collision.

• Air bag diagnosis sensor unit diagnoses electric system of entire system. Self-diagnosis function is adopted,

which indicates system malfunction by turning ON air bag warning lamp on combination meter when a mal-
function is detected. Diagnosis using CONSULT is possible.

Air bag warning lamp

INFOID:0000000010513116

• Air bag warning lamp turns ON indicating a system malfunction

when a malfunction is detected for electric system of SRS air bag
system and seat belt pre-tensioner system.

• For operation check purposes, air bag warning lamp turns ON for 7

seconds after power switch is turned ON. During this period of
time, air bag diagnosis sensor unit performs system diagnosis.

• Air bag warning lamp indicates self-diagnosis result according to

the number of times it blinks. (in diagnosis mode)
NOTE:
SRS air bag and seat belt pre-tensioner do not operate for approx-
imately 7 seconds (air bag warning lamp is turning ON or blinking)
after power switch is turned ON.

AWHIA0627ZZ

: Vehicle front

JMHIA2873ZZ

BF-1845D

COMPONENT PARTS

SRC-13

< SYSTEM DESCRIPTION >

SRC

Front Passenger Air Bag Off Indicator

INFOID:0000000010435464

Front passenger air bag OFF indicator turns ON when turning air
bag cutoff switch OFF position.

Front Passenger Air Bag On Indicator

INFOID:0000000010435465

Front passenger air bag ON indicator turns ON when turning air bag
cutoff switch ON position.

JSHIA0048ZZ

JSHIA0049ZZ

SRC-14

< SYSTEM DESCRIPTION >

SYSTEM

SYSTEM

System Description

INFOID:0000000010377817

SYSTEM DIAGRAM

SYSTEM DESCRIPTION

Supplemental Restraint System (SRS) activates air bag module and seat belt pre-tensioner when it detects a
frontal collision or a side collision that is more than the specified limit. Together with other safety devices, it

JMHIA2896GB

SYSTEM

SRC-15

< SYSTEM DESCRIPTION >

SRC

reduces the impact that occupant receives when vehicle collision occurs. Air bag diagnosis sensor unit sup-
plies power supply to air bag module and pre-tensioner seat belt when deceleration that is more than the
specified limit is detected by G sensor in air bag diagnosis sensor unit, crash zone sensor, satellite sensor. Air
bag module is composed of electric igniter (squib), filter, pyrotechnic material, and gas generating material.
When air bag module receives a signal from air bag diagnosis sensor unit, air bag module ignites pyrotechnic
material using electric igniter (squib) so that gas generating material generates high temperature nitrogen gas.
The gas through filter activates air bag. At the same time, pre-tensioner seat belt receives power supply from
air bag diagnosis sensor unit, gas generator is activated, and then gas is generated. Balls in pipe are moved
according to generated gas pressure and strike pinion gear on ELR shaft. ELR shaft rotates and retracts seat
belt.

AIR BAG DIAGNOSIS SENSOR UNIT FUNCTIONS

Air bag diagnosis sensor unit has the following functions.
• Detects a collision and supplies the energy for deploying air bag and seat belt pre-tensioner.
• Detects and records electrical malfunction in air bag system and seat belt pre-tensioner system, and turns

air bag warning lamp ON.

• Detects and records the deployment of air bag and seat belt pre-tensioner, and turns ON air bag warning

lamp.

• Indicates the malfunction record via CONSULT.
• Transmits car crash information signal to BCM when a collision is detected (collision detection output func-

tion).

Air Bag Warning Lamp

• Detects electrical malfunction in air bag system and seat belt pre-tensioner system, and turns air bag warn-

ing lamp ON.

• Detects deployment malfunction in air bag system and seat belt pre-tensioner system, and turns air bag

warning lamp ON.

• Air bag diagnosis sensor unit warns the driver by turning air bag warning lamp ON when air bag diagnosis

sensor unit detects battery low voltage. Air bag warning lamp turns ON when a voltage value at which air
bag diagnosis sensor unit cannot operate normally (9 V or less) is detected for 10 seconds or more. After
starting to turn ON, air bag warning lamp turns OFF when air bag diagnosis sensor unit detects the normal
value of battery voltage for 10 seconds or more. The mode cannot be switched to diagnosis mode by ignition
switch while air bag warning lamp turns ON due to this cause.

• Air bag diagnosis sensor unit warns the driver by turning air bag warning lamp ON when air bag diagnosis

sensor unit detects battery high voltage. Air bag warning lamp turns ON when a voltage value at which air
bag diagnosis sensor unit cannot operate normally (16 V or more) is detected for 3 seconds or more. After
starting to turn ON, air bag warning lamp turns OFF when air bag diagnosis sensor unit detects the normal
value of battery voltage for 3 seconds or more. The mode cannot be switched to diagnosis mode by ignition
switch while air bag warning lamp turns ON due to this cause.

SRC-16

< SYSTEM DESCRIPTION >

SYSTEM

COLLISION MODES

The operation of SRS is different depending on the collision modes applications. For example, the driver air
bag module, passenger air bag module, seat belt pre-tensioner and lap pre-tensioner are activated in a frontal
collision.
SRS configurations that are activated for the following collision modes.

: Apply —: Not apply

Air bag warning lamp operation

SRS condition

No malfunction is detected

• Air bag is deployed
• Seat belt pre-tensioner is deployed
• Air bag diagnosis sensor unit is malfunctioning
• Air bag warning lamp circuit is malfunctioning
• The system is malfunctioning
• Battery voltage is low (less than 9 V) or high battery voltage

(more than 16 V)

• Self diagnostic result is not erased after repair

• Air bag diagnosis sensor unit is malfunctioning
• Air bag warning lamp circuit is malfunctioning

SHIA0011E

SHIA0013E

SHIA0014E

SRS configuration

Frontal collision

Rear collision

Left side collision

Right side collision

Driver air bag module

—

Passenger air bag module

—

Seat belt pre-tensioner LH

—

Seat belt pre-tensioner RH

—

Lap pre-tensioner LH

—

Lap pre-tensioner RH

—

Side air bag module LH

—

Side air bag module RH

—

Curtain air bag module LH

—

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