2007 NISSAN LATIO Service Repair Manual

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NISSAN LATIO 2007 Service Repair Manual SRS-1
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
H RESTRAINTS
CONTENTS
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SECTION SRS
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SRS
Revision: June 20062007 Versa PRECAUTIONS .....................................................

SRS-1
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
H RESTRAINTS
CONTENTS
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SECTION SRS
A
B
SRS
Revision: June 20062007 Versa PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for SRS “AIR BAG” and “SEAT BELT
PRE-TENSIONER” Service ..................................... 3
Occupant Classification System Precaution ............ 3
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ....... 4
SRS Configuration ................................................... 4
Driver Air Bag Module .............................................. 5
Front Passenger Air Bag Module ............................. 5
Front Side Air Bag .................................................... 5
Side Curtain Air Bag ................................................. 5
Front Seat Belt Pre-tensioner with Load Limiter ...... 6
Occupant Classification System (OCS) ................... 6
Direct-connect SRS Component Connectors ........... 8
TROUBLE DIAGNOSIS .............................................. 9
Trouble Diagnosis Introduction ................................. 9
DIAGNOSIS FUNCTION ....................................... 9
HOW TO PERFORM TROUBLE DIAGNOSES
FOR QUICK AND ACCURATE REPAIR ............... 9
WORK FLOW ...................................................... 10
SRS Components Parts Location ............................11
Schematic .............................................................. 12
Wiring Diagram — SRS — ..................................... 13
CONSULT-II Function (AIR BAG) ........................... 19
HOW TO CHANGE BETWEEN SELF-DIAGNO-
SIS MODE AND USER MODE WITH CONSULT-
II .......................................................................... 19
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 20
Self-Diagnosis Function (Without CONSULT-II) ..... 20
HOW TO CHANGE BETWEEN USER MODE
AND SELF-DIAGNOSIS MODE WITHOUT
CONSULT-II ........................................................ 21
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 21
SRS Operation Check ............................................ 21
DIAGNOSTIC PROCEDURE 1 ........................... 21
Trouble Diagnosis With CONSULT-II ..................... 23
DIAGNOSTIC PROCEDURE 2 ........................... 23DIAGNOSTIC PROCEDURE 3 ........................... 27
DIAGNOSTIC PROCEDURE 4 ........................... 29
DIAGNOSTIC PROCEDURE 5 ........................... 29
Trouble Diagnosis Without CONSULT-II ................. 34
DIAGNOSTIC PROCEDURE 6 ........................... 34
WARNING LAMP FLASH CODE CHART ........... 35
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn Off ............................................................ 39
DIAGNOSTIC PROCEDURE 7 ........................... 39
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn On ............................................................ 40
DIAGNOSTIC PROCEDURE 8 ........................... 40
DRIVER AIR BAG MODULE .................................... 41
Removal and Installation ........................................ 41
REMOVAL ........................................................... 41
INSTALLATION ................................................... 42
SPIRAL CABLE ........................................................ 44
Removal and Installation ........................................ 44
REMOVAL ........................................................... 44
INSTALLATION ................................................... 45
FRONT PASSENGER AIR BAG MODULE .............. 46
Removal and Installation ........................................ 46
REMOVAL ........................................................... 46
INSALLATION ..................................................... 46
SIDE CURTAIN AIR BAG MODULE ........................ 47
Removal and Installation ........................................ 47
REMOVAL ........................................................... 47
INSTALLATION ................................................... 48
CRASH ZONE SENSOR ........................................... 49
Removal and Installation ........................................ 49
REMOVAL ........................................................... 49
INSTALLATION ................................................... 49
SIDE AIR BAG (SATELLITE) SENSOR ................... 50
Removal and Installation ........................................ 50
REMOVAL ........................................................... 50
INSTALLATION ................................................... 50
FRONT SEAT BELT PRE-TENSIONER ................... 51
Removal and Installation ........................................ 51

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NISSAN LATIO 2007 Service Repair Manual SRS-2Revision: June 20062007 Versa DIAGNOSIS SENSOR UNIT ..................................... 52
Removal and Installation ........................................ 52
REMOVAL .......................

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NISSAN LATIO 2007 Service Repair Manual PRECAUTIONS
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Revision: June 20062007 Versa
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EHS

PRECAUTIONS
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Revision: June 20062007 Versa
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EHS001XL
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 and SB section of this Service Man-
ual.
WA RN ING:
To avoid rendering the SRS inoperative, 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 per-
formed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
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
harness connectors.
Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” ServiceEHS001XM
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 min-
utes.
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, do not work on any SRS connectors or wires until at least 3 minutes
have passed.
The air bag diagnosis sensor unit must always be installed with the arrow mark “⇐” pointing toward the
front of the vehicle for proper operation. Also check air bag diagnosis sensor unit for cracks, deformities or
rust before installation and replace as required.
The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to
turn steering wheel or 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.
Do not reuse center pillar upper garnish if removed.
Occupant Classification System PrecautionEHS001XN
Replace control unit and passenger front seat cushion as an assembly.

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NISSAN LATIO 2007 Service Repair Manual SRS-4
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Revision: June 20062007 Versa
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)PFP:28556
SRS ConfigurationEHS001UR
The air bag deploys if the air bag diagnosis sensor unit

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NISSAN LATIO 2007 Service Repair Manual SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
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Revision: June 20062007 Versa
Driver Air Bag ModuleEHS001VD
The driver air bag module is dual stage and located in the steering
whe

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NISSAN LATIO 2007 Service Repair Manual SRS-6
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Revision: June 20062007 Versa
Front Seat Belt Pre-tensioner with Load LimiterEHS001US
The seat belt pre-tensioner system with load limiter is installed for
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SRS-6
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Revision: June 20062007 Versa
Front Seat Belt Pre-tensioner with Load LimiterEHS001US
The seat belt pre-tensioner system with load limiter is installed for
both the driver's seat and the front 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 impact exceeding a specified level
occurs, seat belt slack resulting from clothing or other factors is
immediately taken up by the 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 extension 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.
Occupant Classification System (OCS)EHS001UV
The occupant classification system (OCS) identifies different size occupants, out of position occupants, and
detects if child seat is present in the front passenger seat. The OCS receives inputs from the occupant classi-
fication system sensor (located under the passenger seat cushion assembly) and belt tension sensor (part of
the passenger front seat belt assembly and located at the belt anchor location). Depending on classification of
the passenger, the OCS sends a signal to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit
uses this signal and the seat belt buckle switch RH signal to determine deployment or non deployment of the
front passenger air bag module in the event of a collision. Depending on the signals received, the air bag diag-
nosis sensor unit can disable the front passenger air bag module completely.
NOTE:
In case of customer concern, CONSULT-II can be used to confirm the passenger air bag status (readiness).
Passenger Air Bag Status Conditions
NOTE:
Passenger does not meet Occupant Classification System specifications for passenger air bag activation.
WHIA0324E
Front Passenger Seat
(Condition)PASS AIR BAG OFF Indicator
(Status)Passenger Air Bag Status
(Readiness)CONSULT-II Display
Seat occupied OFF Active (enabled) ON
Seat occupied
NOTEON Deactivated (disabled) OFF
Seat empty OFF Deactivated (disabled) OFF
WHIA0328E

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NISSAN LATIO 2007 Service Repair Manual SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS-7
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Revision: June 20062007 Versa
1. Belt tension sensor 2. Occupant classification system blad-
der3. Occupant classification system s

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NISSAN LATIO 2007 Service Repair Manual SRS-8
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Revision: June 20062007 Versa
Direct-connect SRS Component ConnectorsEHS001UW
The following SRS components use direct-connect style harness connectors.
Drive

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