NISSAN LATIO 2009 Service Repair Manual

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CONTENTS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
PRECAUTION ....... ........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution for SRS "AIR BAG" and "SEAT BELT
PRE-TENSIONER" Service ................................ ......
2
Precaution Necessary fo r Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
Occupant Classification System Precaution ....... ......3
SYMPTOM DIAGNOSIS ..... ..........................4
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 ...... ......7
TROUBLE DIAGNOSIS ................................. .....8
Trouble Diagnosis Introduction ........................... ......8
SRS Component Parts Location ......................... ....10
Schematic ........................................................... ....11
Wiring Diagram - SRS- ........................................ ....12
CONSULT-III Function (AIR BAG) ...................... ....17
Self-Diagnosis Function (Without CONSULT-III) .... 18
SRS Operation Check ......................................... ....19
Trouble Diagnosis with CONSULT-III ................. ....20
Trouble Diagnosis without CONSULT-III ............ ....28
Trouble Diagnosis: "AIR BAG" Warning Lamp
Does Not Turn Off ............................................... ....
31 Trouble Diagnosis: "AIR BAG" Warning Lamp
Does Not Turn On ............................................... ....
32
ON-VEHICLE REPAIR ..... ............................34
DRIVER AIR BAG MODULE ............................ 34
Removal and Installation ..................................... ....34
SPIRAL CABLE ................................................ 37
Removal and Installation ..................................... ....37
FRONT PASSENGER AIR BAG MODULE ...... 39
Removal and Installation ..................................... ....39
SIDE CURTAIN AIR BAG MODULE ................ 40
Component .......................................................... ....40
Removal and Installation ..................................... ....40
CRASH ZONE SEN SOR ................................... 42
Removal and Installation ..................................... ....42
SIDE AIR BAG (SATELLITE) SENSOR ........... 43
Removal and Installation ..................................... ....43
FRONT SEAT BELT PRE-TENSIONER ........... 44
Removal and Installation ..................................... ....44
DIAGNOSIS SENSOR UNIT ............................. 45
Removal and Installation ..................................... ....45
OCCUPANT CLASSIFICATION SYSTEM
CONTROL UNIT ................................................ 46
Removal and Installation ..................................... ....46
COLLISION DIAGNOSIS .................................. 47
For Frontal Collision ............................................ ....47
For Side and Rollover Colli sion ...............................48

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OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Occupant Classification System Precaution INFOID:0000000004307174
Replace control unit and passenger front seat cushion as an assembly.

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Driver Air Bag Module
INFOID:0000000004307176
The driver air bag module is dual stage and located in the steering
wheel assembly. It operates with the SRS system in a frontal colli-
sion exceeding a specified level.
Front Passenger Air Bag Module INFOID:0000000004307177
The front passenger air bag module is located behind the instrument
panel assembly (mounted to the steering member). It operates with
the SRS system in a frontal collision exceeding a specified level.
Refer to SRS-6, " Occupant Classification System (OCS) " for more
information.
Front Side Air Bag INFOID:0000000004307178
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 INFOID:0000000004307179
Side curtain air bag modules are located above the vehicle headlin-
ing and run from the front to the rear of the vehicle. Vehicles with
side curtain air bags are equipped with labels as shown. WHIA0326E
WHIA0041E

1. Belt tension sensor 2. Occupant classification system bladder 3. Occupant classification system sensor
4. Occupant classification system con- trol unit

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Direct-connect SRS Co
mponent Connectors INFOID:0000000004307182
The following SRS components use dire ct-connect style harness connectors.
• Driver air bag module
• Passenger air bag module
• LH side curtain air bag module
• RH side curtain air bag module
• Front LH seat belt pre-tensioner
• Front RH seat belt pre-tensioner
Always pull up to release the locking tab prior to removing connector from SRS component.
Always push down to lock the locking tab after installing connector to
SRS component. When locked, the locking tab is level with the con-
nector housing.

How to Handle Battery " .)
• Fuses (Refer to SRS-11, " Schematic " .)
• System component-to-harness connections
WORK FLOW User mode Diagnosis mode Display type
“AIR BAG” warning lamp X X ON-OFF operation CONSULT-III — X Monitoring

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*1: "PRELIMINARY CHECK" *2:
SRS-19 *3:
SRS-20 *4:
SRS-28