SRC-4
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000012430587
The Supplemental Restraint System such as “A IR 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 SR and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, 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 NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses 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 Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c 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 three minutes before performing any service.
ServiceINFOID:0000000012430588
• Never use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OF F, 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 SR S 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 chec k 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.)
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COMPONENT PARTSSRC-7
< SYSTEM DESCRIPTION >
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Front Side Air Bag ModuleINFOID:0000000012430592
Front side air bag modules are built into the front seatback assem-
blies. Vehicles with side air bags are equipped with labels as shown.
Side Curtain Air Bag ModuleINFOID:0000000012430593
Side curtain air bag modules are located above the vehicle headlin-
ing.Vehicles with side curtain air bags are equipped with labels on
the pillar upper finishers.
Front Seat Belt Pre-tensionerINFOID:0000000012430594
The seat belt pre-tensioner system with load limiter is installed for
both the driver's seat and the fr ont passenger's seat. It operates
simultaneously with the SRS air bag system in the event of a frontal
collision with an impact exceeding a specified level.
When the frontal collision with an im pact exceeding a specified level
occurs, seat belt slack resulting from clothing or other factors is
immediately taken up by the belt pre-tensioner. Vehicle passengers
are securely restrained.
When passengers in a vehicle are thrown forward in a collision and
the restraining force of the seat belt exceeds a specified level, the
load limiter permits the specified ex tension of the seat belt by the
twisting of the ELR shaft, and a relaxation of the chest-area seat belt
web tension while maintaining force.
Air Bag Diagnosis Sensor UnitINFOID:0000000012430595
The air bag diagnosis sensor unit is located under the center con-
sole assembly. The air bag diagnosis sensor unit receives signals
from multiple SRS sensors and cont rols the deployment of the air
bags. The deployment of the air bags depends on the type and
severity of the collision. The air bag diagnosis sensor unit has self-
diagnosis capability through the us e of the CONSULT as well as
flash codes displayed by the air bag warning lamp.
AWHIA0333ZZ
AWHIA0545ZZ
AWHIA0535ZZ
AWHIA0536ZZ
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SRC-12
< SYSTEM DESCRIPTION >
SYSTEM
Passenger does not meet Occupant Classification System specifications for passenger air bag activation.
SEAT BELT WARNING LAMP SYSTEM
SEAT BELT WARNING LAMP SYSTEM : System DescriptionINFOID:0000000012430603
SYSTEM DIAGRAM
AWHIA0548ZZ
AWHIA0694GB
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SYSTEMSRC-13
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The seat belt warning lamp (1) will remind the driver if the driver or front passenger seat belt should be buck-
led. The system works in conjunction with the occupant classification system. Refer to SRC-11, "
OCCUPANT
CLASSIFICATION SYSTEM : System Description".
Seat Belt Warning System Operation
AWHIA0709ZZ
Driver seat status
(Ignition switch ON)Passenger seat status Seat belt buckle switch
LH status Seat belt buckle switch
RH status Seat belt warning lamp
Seat occupied Seat occupied
Buckled Buckled
Off
Unbuckled On
Seat unoccupied —Off
— Unbuckled On
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SRC-14
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (AIR BAG)
DIAGNOSIS SYSTEM (AIR BAG)
DescriptionINFOID:0000000012430604
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 identifi ed by yellow and/or orange harnesses or harness
connectors.
• Never repair, splice or modify the SRS wiring harn ess. 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 Diagn osis FunctionINFOID:0000000012430605
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
• Diagnosis mode changes from user mode to diagnosis mode when changing operation is performed.
• In user mode, when SRS air bag warning lamp is not turning ON, changing to diagnosis mode by ignition
switch operation is not possible.
• In diagnosis mode, when repair is complete and system is normal, the mode changes to user mode when
ignition switch is turned from OFF to ON.
Procedure to Change Diagnosis Mode
1. Turn ignition switch from OFF to ON.
2. SRS air bag lamp turns ON for 7 seconds and turns OFF, then turn ignition switch OFF within 2 seconds after the lamp turns OFF.
NOTE:
When in Diagnosis Mode, the air bag warning lamp may illuminate for more than 7 seconds after the igni-
tion switch is turned ON. If this is the case, the i gnition switch must still be cycled OFF after 7 seconds.
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.
USER MODE
In USER MODE, air bag warning lamp on combination meter turns ON 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 turns ON.
2. Compare the air bag warning lamp operation pattern with the examples.
Air Bag Warning Lamp Examples:
Diagnosis tool User modeDiagnosis mode
Air bag warning lamp ××
CONSULT –×
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DIAGNOSIS SYSTEM (AIR BAG)SRC-15
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Air bag warning lamp flashing pattern (User Mode)
DIAGNOSIS MODE
NOTE:
Diagnosis Mode can not be entered if a malfunction is not detected in User Mode.
1. Turn ignition switch ON.
2. After AIR BAG warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.
3. Wait more than 3 seconds.
4. Repeat steps 1 to 3 two more times (3 times total).
5. Turn ignition switch ON.
SRS is now in Diagnosis Mode. Refer to SRC-21, "
Flash Code Index".
Warning lamp SRS conditionReference item
• No malfunction is detected.
• No further action is necessary. —
The system is malfunctioning and
needs to be repaired. Refer to SRC-16, "
Trouble Diagno-
sis with CONSULT" or SRC-14, "On
Board Diagnosis Function".
• Air bag is deployed.
• Seat belt pre-tensioner is deployed. Refer to
SR-5, "
For Frontal Collision"
or SR-7, "
For Side and Rollover Col-
lision".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag power supply circuit is mal- functioning.
• SRS air bag warning lamp circuit is
malfunctioning. Refer to SRC-97, "
Diagnosis Proce-
dure".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag warning lamp circuit is mal- functioning. Refer to SRC-98, "
Diagnosis Proce-
dure".
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E
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SRC-16
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (AIR BAG)
Trouble Diagnosis with CONSULT
INFOID:0000000012430606
1. Connect CONSULT.
2. DTC is displayed on SELF-DIAG RESULTS.
NOTE:
If a malfunction is not detected on “SELF-DIAG RESULTS [CURRENT]”, but a malfunction is detected during
SRS Operation Check, the following cases may exist:
• “SELF-DIAG [PAST]” memory might not be erased. Refer to SRC-14, "
On Board Diagnosis Function".
• SRS system malfunctions intermittently. Refer to SRC-41, "
InspectionProcedure".
DIAGNOSIS MODE
1. Connect CONSULT.
2. Confirm that zero point reset of OCS is complete.
3. If no DTCs are detected on “SELF-DIAG RESULTS [CURRE NT]”, repair of SRS is completed. Go to step
4.
If any DTCs are detected on “SELF-DIAG RESULT S [CURRENT]”, the malfunction has not been repaired
completely or another malfunction is being detected. Perform SRS Operation Check again. Refer to SRC-
14, "On Board Diagnosis Function".
4. Touch “ERASE”. NOTE:
Touching “ERASE” will clear the SRS memory of the malfunction (“SELF-DIAG [PAST]”). If “SELF-
DIAG [PAST]” is not erased, User Mode may sh ow the previous system malfunction even if the
malfunction has been repaired completely.
5. Check that no malfunction is det ected in “SELF-DIAG [PAST]”.
6. Exit Diagnosis Mode and disconnect the CONSULT.
7. Perform SRS Operation Check. Refer to SRC-14, "
On Board Diagnosis Function".
SRS HISTORY CHECK
1. Check repair history of the SRS. If no repairs have been made, perform SRC-14, "On Board Diagnosis
Function". If repairs have been made, GO TO step 2.
2. Erase ”SELF-DIAG [PAST]” after repair. Refer to SRC-14, "
On Board Diagnosis Function".
CONSULT Function (AIR BAG)INFOID:0000000012430607
CONSULT can display each diagnostic item using the diagnostic test modes shown following.
Diagnostic Test ModeDiagnostic Item Description
Self Diagnostic Result SEL F-DIAG RESULT [CURRENT]A current Self-diagnosis result (also indicated by the number of
warning lamp flashes in the Diagnosis mode) is displayed on the
CONSULT screen in real time. This refers to a malfunctioning part
requiring repairs.
Data Monitor DATA MONITOR Displays air bag diagnosis sensor unit input/output data in real time.
ECU Identification ECU DISCRIMINATED NO. Air bag diagnosis sensor unit ECU discriminated number (identifica-
tion number) or part number is displayed. Air bag diagnosis sensor
unit has individual ECU discriminated number (identification num-
ber) or part number based on model and equipment.
Trouble Diagnostic Record TR OUBLE DIAG RECORD [PAST] With TROUBLE DIAG RECORD, diagnosis results previously
erased by a reset operation can be displayed on the CONSULT
screen.
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DIAGNOSIS SENSOR UNITSRC-17
< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
DIAGNOSIS SENSOR UNIT
DTC IndexINFOID:0000000012430608
DIAGNOSTIC CODE CHART
NOTE:
Follow the procedures in numerical order when repairi ng malfunctioning parts. Confirm whether malfunction is
eliminated using air bag warning lamp or CONSULT each time repair is finished. If malfunction is still
observed, proceed to the next step. When malfunction is elim inated, further repair work is not required.
CONSULT nameDTCDTC detecting condition Repair order
DRIVER AIRBAG MODULE CIRCUIT [OPEN]
B0001Driver air bag module circuit (DR1) is open
(including the spiral cable).
Refer to SRC-43, "
Diag-
nosis Procedure".
DRIVER AIRBAG MODULE CIRCUIT [VB-SHORT] Driver air bag module circuit (DR1) is short-
ed to a power supply circuit
(including the spiral cable).
DRIVER AIRBAG MODULE CIRCUIT [GND-SHORT] Driver air bag module circuit (DR1) is short-
ed to ground
(including the spiral cable).
DRIVER AIRBAG MODULE CIRCUIT [SHORT] Driver air bag module circuits (DR1) are
shorted to each other
(including the spiral cable).
DRIVER AIRBAG MODULE 2ND CIRCUIT [OPEN]
B0002Driver air bag module circuit (DR2) is open
(including the spiral cable).
DRIVER AIRBAG MODULE 2ND CIRCUIT [VB-SHORT] Driver air bag module circuit (DR2) is short-
ed to a power supply circuit
(including the spiral cable).
DRIVER AIRBAG MODULE 2ND CIRCUIT [GND-SHORT] Driver air bag module circuit (DR2) is short-
ed to ground
(including the spiral cable).
DRIVER AIRBAG MODULE 2ND CIRCUIT [SHORT] Driver air bag module circuits (DR2) are
shorted to each other
(including the spiral cable).
ASSIST AIRBAG MODULE CIRCUIT [OPEN]
B0010Front passenger air bag module circuit
(AS1) is open.
Refer to SRC-45, "
Diag-
nosis Procedure".
ASSIST AIRBAG MODULE CIRCUIT [VB-SHORT] Front passenger air bag module circuit
(AS1) is shorted to a power supply circuit.
ASSIST AIRBAG MODULE CIRCUIT [GND-SHORT] Front passenger air bag module circuit
(AS1) is shorted to ground.
ASSIST AIRBAG MODULE CIRCUIT [SHORT] Front passenger air bag module circuits
(AS1) are shorted to each other.
ASSIST AIRBAG MODULE 2ND CIRCUIT [OPEN]
B0011Front passenger air bag module circuit
(AS2) is open.
ASSIST AIRBAG MODULE 2ND CIRCUIT [VB-SHORT] Front passenger air bag module circuit
(AS2) is shorted to a power supply circuit.
ASSIST AIRBAG MODULE 2ND CIRCUIT [GND-SHORT] Front passenger air bag module circuit
(AS2) is shorted to ground.
ASSIST AIRBAG MODULE 2ND CIRCUIT [SHORT] Front passenger air bag module circuits
(AS2) are shorted to each other.
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