Nissan Juke (2016 year). Service Repair Manual — part 580

COMPONENT PARTS

SRC-7

< SYSTEM DESCRIPTION >

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Seat belt pre-tensioner LH/RH

• Receives signal from air bag diagnosis sensor unit and deploys seat belt pre-ten-

sioner and lap pre-tensioner.

• In the case of a frontal collision or side collision that exceeds specified impact level,

the air bag diagnosis sensor unit detects the deceleration caused by collision. It re-
strains the passenger with seat belt easing the stress on passengers chest with
load limiter.

Side air bag module LH/RH

• Receives signal from air bag diagnosis sensor unit and deploys air bag.
• In case of side collision where acceleration is more than the specified level, the ig-

nition materials are ignited by electric ignition system. The system burns the gas
generating materials resulting in a chemical reaction. This generates hot gases that
flow into the air bag through a filter and expand the bag.

Component

Function

Revision: November 2015

2016 JUKE

SRC-8

< SYSTEM DESCRIPTION >

SYSTEM

SYSTEM

System Diagram

INFOID:0000000012199573

System Description

INFOID:0000000012199574

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 reduces the impact that occupant receives when vehicle collision occurs.

Air bag diagnosis sensor unit supplies power supply to air bag module and pre-tensioner seat belt when decel-

eration that is more than the specified limit is detected by G sensor in air bag diagnosis sensor unit, crash

zone sensor, satellite sensor, or front door 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 the deployment of air bag and seat belt pre-tensioner, and turns ON air bag warning

lamp.

JMHIA1721GB

Revision: November 2015

2016 JUKE

SYSTEM

SRC-9

< SYSTEM DESCRIPTION >

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• Indicates malfunctioning portion via the number of blinks from the air bag warning lamp in the diagnosis

mode.

• Indicates the malfunction record via CONSULT.

• Suppresses the deployment of passenger air bag when passenger seat is empty or occupied by child or

child-seat.

• When passenger seat is occupied by child or child seat, turns ON passenger air bag OFF indicator.

• When judges that passenger seat is occupied by a adult or a child and passenger seat belt is not fasten,

turns ON seat belt warning lamp. Further information for the seat belt warning 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, and seat belt pre-tensioner are activated in a frontal collision or side

collision.

SRS configurations that are activated for the following collision modes.

×

: Apply —: Not apply

OCCUPANT DETECTION SYSTEM

This Occupant Detection System has the following functions.
1. Suppress the deployment of front passenger air bag when front passenger seat is empty, or when occu-

pied by child and child-seat. Turns ON front passenger air bag OFF indicator when front passenger seat is

occupied by child-seat and child.

2. Indicates malfunction portion with blinking times of air bag warning lamp in diagnosis mode.
3. Indicates the malfunctioning record by CONSULT.
4. When “zero point reset” for occupant detection system is incomplete, CONSULT indicates that “zero point

reset” is incomplete.

This function is applied to NISSAN genuine parts only.

NOTE:

• Operation of air bag diagnosis sensor unit when air bag diagnosis sensor unit receives information from

Occupant Detection System.

• Even if zero point reset is “complete”, always perform zero point reset after the removal and installation of

seat or the removal of control unit harness connector.

SRS configuration

Frontal 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

×

—

×

Side air bag module LH

—

×

—

Side air bag module RH

—

—

×

Curtain air bag module LH

—

×

—

Curtain air bag module RH

—

—

×

Status (front passenger
seat)

Passenger air bag

Front passenger air
bag OFF indicator

Air bag warning lamp

Seat belt warning lamp
(when front passenger
seat is unbuckled)

Empty

Suppress

OFF

OFF

OFF

An object

Suppress

ON

OFF

OFF

Child/ child-seat

Suppress

ON

OFF

ON

Adult

Enable to deploy

OFF

OFF

ON

Malfunction

Suppress

ON

Blinking

OFF

Zero point reset
Not yet performed (NIS-
SAN genuine parts
only)

Suppress

ON

Blinking

OFF

Revision: November 2015

2016 JUKE

SRC-10

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AIR BAG)

DIAGNOSIS SYSTEM (AIR BAG)

Description

INFOID:0000000012199575

CAUTION:

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

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

connectors.

• Never repair, splice or modify the SRS wiring harness. If the harness is damaged, replace it with a

new one.

• Keep ground portion clean.

DIAGNOSIS FUNCTION

• The SRS self-diagnostic results can be read with air bag warning lamp and/or CONSULT.

• The user mode is exclusively prepared for the customer (driver). This mode warns the driver of a system

malfunction through the operation of the air bag warning lamp.

• The diagnosis mode allows the technician to locate and inspect the malfunctioning part.

• The mode applications for the air bag warning lamp and CONSULT are as per the following items.

×

: Application, —: Not application

On Board Diagnosis Function

INFOID:0000000012199576

ON-BOARD DIAGNOSIS

There are two self diagnosis functions with air bag warning lamp per the following items.

• USER MODE

• DIAGNOSIS MODE

METHOD OF STARTING

• User mode is a mode for ordinary use. When a malfunction of SRS air bag is detected, SRS air bag warning

lamp blinks to warn the user.

• Diagnosis mode enables malfunctioning system to be checked according to the number of blinks.

• User mode or Diagnosis mode changes from diagnosis mode when changing operation is performed.

• In user mode, when SRS air bag warning lamp is not blinking, changing to diagnosis mode by ignition switch

operation is not possible.

• In diagnosis mode, SRS air bag warning lamp may turn ON after ignition switch operation more than 7 sec-

onds, but it is possible to change the status from diagnosis mode to user mode by ignition switch operation

after 7 seconds.

• When multiple systems malfunction is detected, all of the malfunctions are displayed in Diagnosis mode.

Procedure to Change Diagnosis Mode

1. Turn ignition switch from OFF to ON.

2. SRS air bag lamp turns ON for 7 seconds, then turn ignition switch OFF within 2 seconds after the lamp

turns OFF.

3. After turning ignition switch OFF, wait for 3 seconds or more.

4. Repeat operation 1 to 3 for 2 times so that operation 1 to 3 is repeated for 3 times in total.

5. Turn ignition switch from OFF to ON. Diagnosis mode changes.

CAUTION:

• In Diagnosis mode, if the system is normal and “PAST“ of “Self Diagnostic Result“ is indicated,

always perform “ERASE“ of “Self Diagnostic Result“ using CONSULT.

• When “ERASE“ of “Self Diagnostic Result“ is performed using CONSULT, the mode changes auto-

matically from Diagnosis mode to User mode.

USER MODE

In USER MODE, air bag warning lamp on combination meter blinks when a malfunction is detected and warns

the customer (driver).

How to Read Air Bag Warning Lamp

1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.

Diagnosis tool

User mode

Diagnosis mode

Air bag warning lamp

×

×

CONSULT

–

×

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DIAGNOSIS SYSTEM (AIR BAG)

SRC-11

< SYSTEM DESCRIPTION >

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2. Compare the air bag warning lamp blinking pattern with the examples.

Air Bag Warning Lamp Examples

Occurrence of Intermittent Malfunction

Air bag warning lamp blinks in user mode when an intermittent malfunction occurs. Air bag warning lamp turns

OFF when system returns to normal status.

Air bag warning lamp operation (user mode)

SRS condition

Reference item

• No malfunction is detected
• No further action is necessary

–

• Air bag diagnosis sensor unit is mal-

functioning

• Each sensor is malfunctioning
• Each module is malfunctioning

Refer to “How to Read Air Bag Warn-
ing Lamp”

• Air bag is deployed
• Seat belt pre-tensioner is deployed

Refer to

SRC-76, "Diagnosis Proce-

dure"

or

SRC-77, "Diagnosis Proce-

dure"

• Air bag diagnosis sensor unit is mal-

functioning

• Air bag power supply circuit is mal-

functioning

• Air bag warning lamp circuit is mal-

functioning

• Combination meter is malfunctioning

Refer to

SRC-87, "Diagnosis Proce-

dure"

Battery voltage is low (less than 9 V) or
high battery voltage (more than 16 V)

Check Battery voltage. Refer to

PG-

97, "How to Handle Battery"

.

Occupant system is malfunctioning

Refer to “How to Read Air Bag Warn-
ing Lamp”

Zero point reset not yet performed

Refer to

SRC-32, "ZERO POINT RE-

SET : Description"

.

• Air bag diagnosis sensor unit is mal-

functioning

• Air bag warning lamp circuit is mal-

functioning

• Combination meter is malfunctioning

Refer to

SRC-88, "Diagnosis Proce-

dure"

SHIA0011E

SHIA0012E

SHIA0013E

SHIA0014E

Revision: November 2015

2016 JUKE

SRC-12

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AIR BAG)

Battery Low Voltage Detection

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.

Battery High Voltage Detection

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 (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.

DIAGNOSIS MODE

The diagnosis mode can only be switched when a malfunction is detected in the user mode. Malfunctioning

system is indicated according to blinking pattern of air bag warning lamp.

How to Read Air Bag Warning Lamp

1. Follow the procedures of “PROCEDURE TO CHANGE DIAGNOSIS MODE”, and switch to the diagnosis

mode.

2. Turn ignition switch ON. Check the blinking pattern of air bag warning lamp.

There are 4 blinking patterns for the air bag warning lamp as per the following items.

• Front air bag system: Two 1.5 second blinks followed by a 0.5 second blink repeated.

• Side air bag system: Three 1.5 second blinks followed by a 0.5 second blink repeated.

• Air bag control unit system: 3 second blink followed by a 0.5 second blink repeated.

• Sensor system: Two 3 second blinks followed by a 0.5 second blink repeated.

Front air bag system

Side air bag system

Air bag control unit system

Sensor system

Number of 0.5 second blinks

Malfunctioning items

1

Driver air bag module

2

Passenger air bag module

3

Seat belt pre-tensioner LH

4

Seat belt pre-tensioner RH

Number of 0.5-second blinks

Malfunctioning items

1

Side air bag module LH

2

Side air bag module RH

3

Curtain air bag module LH

4

Curtain air bag module RH

Number of 0.5 second blinks

Malfunctioning items

1

Collision detection

2

Air bag diagnosis sensor unit

3

Passenger air bag OFF indicator

4

Occupant detection system control unit

Number of 0.5 second blinks

Malfunctioning items

1

Crash zone sensor

2

Satellite sensor LH

3

Satellite sensor RH

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DIAGNOSIS SYSTEM (AIR BAG)

SRC-13

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How to Erase Self-diagnostic Result

After completing the indicated repair, check the system condition in Diagnosis mode and perform “ERASE“ of

“Self Diagnostic Result“ using CONSULT.

EXAMPLE OF AIR BAG WARNING LAMP OPERATION IN THE DIAGNOSIS MODE

System Normal

When the system is normal and “PAST“displayed in “Self Diagnostic Result“.

Single System Malfunction

• Front air bag system

When driver air bag module (Item display) is malfunctioning.

• Side air bag system

When side air bag module LH (Item display) is malfunctioning.

• Air bag control unit system

When air bag diagnosis sensor unit (Item display) is malfunctioning.

• Sensor system

6

Front door satellite sensor LH or RH

7

Front door satellite sensor RH

Number of 0.5 second blinks

Malfunctioning items

JMHIA2358GB

JMHIA2359GB

JMHIA2361GB

JSHIA0053GB

Revision: November 2015

2016 JUKE

SRC-14

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AIR BAG)

When crash zone sensor (Item display) is malfunctioning.

Multiple Systems Malfunction

• Front air bag system

When driver air bag module (Item display 1) and passenger air bag module (Item display 2) are malfunction-

ing.

• Side air bag system

When side air bag module LH (Item display 1) and side air bag module RH (Item display 2) are malfunction-

ing.

• Air bag control unit system

When air bag diagnosis sensor unit (Item display 1) and front passenger air bag indicator (Item display 2)

are malfunctioning.

• Sensor system

JMHIA2366GB

JMHIA2360GB

JSHIA0057GB

JSHIA0056GB

Revision: November 2015

2016 JUKE