sensor NISSAN LATIO 2008 Service Repair Manual

REAR SUSPENSION BEAM
RSU-11
< SERVICE INFORMATION >
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REAR SUSPENSION BEAM
Removal and InstallationINFOID:0000000001703741
REMOVAL
1. Remove rear tires from vehicle using power tool.
2. Separate parking brake rear cable from rear drum brake and rear suspension beam. Refer to PB-4
.
3. Remove wheel sensor and wheel sensor harness from wheel hub and bearing assembly and rear suspen-
sion beam. Refer to BRC-32
.
4. Remove lock plate and separate brake tube from brake hose.
Refer to BR-10
.
5. Remove wheel hub and bearing assembly and back plate. Refer
to RAX-4
.
6. Set jack under rear suspension beam.
7. Remove coil spring (left/right). Refer to RSU-10, "
Removal and
Installation" .
8. Remove bolts between body and rear suspension beam
bracket. Refer to RSU-7, "
Component" .
9. Gradually lower the jack, and then remove rear suspension
beam from vehicle.
10. Remove the rear suspension beam bracket bolt and nut, and then remove rear suspension beam bracket
from rear suspension beam. Refer to RSU-7, "
Component" .
11. Remove brake tube protector from rear suspension beam..
INSPECTION AFTER REMOVAL
Check components for deformation, cracks, and other damage, and replace if necessary.
INSTALLATION
• Installation is in the reverse order of removal. For tightening torque, refer to RSU-7, "Component" .
• Perform final tightening of rear suspension beam and rear suspen-
sion beam bracket (rubber bushing) under unladen conditions with
tires on level ground.
• Refill with new brake fluid and bleed air. Refer to BR-8, "
Bleeding
Brake System" .
• Check the following after finishing work.
- Parking brake operation (stroke): Refer to PB-4, "
On-Vehicle Ser-
vice" .
- Wheel sensor harness for proper connection: Refer to BRC-32
.
MEIA0029E
MEIA0030E

SEAT BELTS
SB-3
< ON-VEHICLE REPAIR >
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ON-VEHICLE REPAIR
SEAT BELTS
Removal and Installation of Front Seat BeltINFOID:0000000001703899
CAUTION:
Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.
1. Seat belt pre-tensioner connector 2. Seat belt retractor 3. Outer anchor RH (belt ten-
sion sensor)
4. Anchor cover (belt tension sensor) 5. Belt tension sensor connector 6. Anchor cover
7. Outer anchor LH 8. D-ring anchor 9. Adjuster cover
10. Seat belt adjuster A. Retractor bolt upper B. Retractor anchor bolt
C. Outer anchor bolt D. D-ring anchor bolt E. Adjuster anchor bolt
⇐Vehicle front
WHIA0361E

SB-4
< ON-VEHICLE REPAIR >
SEAT BELTS
REMOVAL OF SEAT BELT RETRACTOR
1. Disconnect both the negative and positive battery cables, then wait at least 3 minutes.
2. Remove the adjuster cover and D-ring anchor bolt.
3. Remove both the center pillar upper and lower garnish. Refer to EI-37
.
WARNING:
Do not reuse center pillar upper garnish if removed.
4. Pull the floor trim away from center pillar.
5. Disconnect seat belt tension sensor connector and pre-ten-
sioner connector. Refer to SRS-6, "
Direct-connect SRS Compo-
nent Connectors".
6. Remove the outer anchor bolt.
7. Remove the seat belt retractor screw and anchor bolt, then remove the seat belt retractor.
INSTALLATION OF SEAT BELT RETRACTOR
Installation is in the reverse order of removal.
REMOVAL OF SEAT BELT BUCKLE
1. Remove the front seat, refer to SE-11, "Removal and Installation".
2. Disconnect the seat belt buckle harness connector (1).
⇐: Vehicle front
3. Remove the anchor bolt (A), then remove the seat belt buckle
(2).
INSTALLATION OF SEAT BELT BUCKLE
Installation is in the reverse order of removal.
PHIA0953J
ALHIA0095GB

SE-12
< SERVICE INFORMATION >
FRONT SEAT
1. Remove the rear leg covers.
2. Remove the front leg covers.
3. Remove the mounting bolts on the back side of the front seat. (TORX bolt: T50)
4. Remove the mounting bolts on the front side of the front seat. (TORX bolt: T50)
5. Disconnect the harness connector under the seat and remove harness securing clips.
CAUTION:
Before removal, be sure to turn ignition switch OFF, disconnect both battery cables, and then wait
for at least 3 minutes.
6. Set seatback in a neutral position, and then remove front seat from the vehicle.
Installation
Install in the reverse order of removal. Be careful of the following three points.
• Before the installation, confirm that the inside and outside slide rails are locked at the same positions.
• Confirm that the slide rail location pin is set to the hole on the floor.
• Clamp the harness in position.
Disassembly and AssemblyINFOID:0000000001704265
SEAT CUSHION TRIM AND PAD
CAUTION:
• Front passenger seat is equipped with an Occupant Classification System sensor and control mod-
ule. Do not disassemble front passenger seat cushion assembly or remove the trim as this will affect
the Occupant Classification System calibration.
• During installation, the wire harness clips must be installed in the holes they were originally in. Do
not add additional clips.
Disassembly
1. Remove the retainer of seat cushion trim.
2. Remove the hog rings to separate the seat cushion pad and seat cushion trim.
3. Remove seat cushion trim and seat cushion pad from the seat cushion frame.
Assembly
Assembly is the reverse order of removal.
SEAT CUSHION FRAME
Disassembly
1. Remove the seat cushion trim and pad. Refer to "SEAT CUSHION TRIM AND PAD" .
PIIB2669J
PIIB2668J

SRS-1
RESTRAINTS
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SECTION SRS
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SRS
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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
Occupant Classification System Precaution .............2
SYMPTOM DIAGNOSIS ...............................3
SUPPLEMENTAL RESTRAINT SYSTEM
(SRS) ...................................................................
3
SRS Configuration ....................................................3
Driver Air Bag Module ...............................................4
Front Passenger Air Bag Module ..............................4
Front Side Air Bag .....................................................4
Side Curtain Air Bag ..................................................4
Front Seat Belt Pre-tensioner with Load Limiter .......5
Occupant Classification System (OCS) ....................5
Direct-connect SRS Component Connectors ............6
TROUBLE DIAGNOSIS ......................................7
Trouble Diagnosis Introduction .................................7
SRS Component Parts Location ...............................9
Schematic ...............................................................10
Wiring Diagram - SRS- ............................................11
CONSULT-III Function (AIR BAG) ..........................16
Self-Diagnosis Function (Without CONSULT-III) ....17
SRS Operation Check .............................................18
Trouble Diagnosis with CONSULT-III .....................19
Trouble Diagnosis without CONSULT-III ................27
Trouble Diagnosis: "AIR BAG" Warning Lamp
Does Not Turn Off ...................................................
30
Trouble Diagnosis: "AIR BAG" Warning Lamp
Does Not Turn On ...................................................
31
ON-VEHICLE REPAIR .................................33
DRIVER AIR BAG MODULE ............................33
Removal and Installation .........................................33
SPIRAL CABLE ................................................36
Removal and Installation .........................................36
FRONT PASSENGER AIR BAG MODULE ......38
Removal and Installation .........................................38
SIDE CURTAIN AIR BAG MODULE ................39
Component ..............................................................39
Removal and Installation .........................................39
CRASH ZONE SENSOR ...................................41
Removal and Installation .........................................41
SIDE AIR BAG (SATELLITE) SENSOR ...........42
Removal and Installation .........................................42
FRONT SEAT BELT PRE-TENSIONER ...........43
Removal and Installation .........................................43
DIAGNOSIS SENSOR UNIT .............................44
Removal and Installation .........................................44
OCCUPANT CLASSIFICATION SYSTEM
CONTROL UNIT ................................................
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Removal and Installation .........................................45
COLLISION DIAGNOSIS ..................................46
For Frontal Collision ................................................46
For Side and Rollover Collision ...............................47

SRS-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001703904
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 SR and SB section of this Service Man-
ual.
WARNING:
• 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 performed by
an authorized NISSAN/INFINITI dealer.
• 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 the SR 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 har-
ness connectors.
Precaution for SRS "AIR BAG" and "SEAT BELT PRE-TENSIONER" Service
INFOID:0000000001703905
• 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 PrecautionINFOID:0000000001703906
Replace control unit and passenger front seat cushion as an assembly.

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS-3
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS ConfigurationINFOID:0000000001703907
The air bag deploys if the air bag diagnosis sensor unit is activated while the ignition switch is in the ON or
START position.
The collision modes for which supplemental restraint systems are activated are different among the SRS sys-
tems. For example, the driver air bag module, front passenger air bag module and front seat belt pre-tension-
ers are activated in a frontal collision but not in a side collision.
SRS configurations for some collision modes are as follows:
WHIA0186E
SRS configuration Frontal collision Left side collision Right side collision
Driver air bag module×——
Front passenger air bag module×——
Front LH seat belt pre-tensioner×——
Front RH seat belt pre-tensioner×——
Front LH side air bag module —×—
Front RH side air bag module — —×
LH side curtain air bag module —×—
RH side curtain air bag module — —×

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS-5
< SYMPTOM DIAGNOSIS >
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Front Seat Belt Pre-tensioner with Load LimiterINFOID:0000000001703912
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)INFOID:0000000001703913
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-III 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-III Display
Seat occupied OFF Active (enabled) ON
Seat occupied
NOTEON Deactivated (disabled) OFF
Seat empty OFF Deactivated (disabled) OFF
1. Belt tension sensor 2. Occupant classification system bladder 3. Occupant classification system sensor
4. Occupant classification system con-
trol unit
WHIA0328E

TROUBLE DIAGNOSIS
SRS-9
< SYMPTOM DIAGNOSIS >
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SRS Component Parts LocationINFOID:0000000001703916
1. Crash zone sensor 2. Spiral cable 3. Front passenger air bag off indicator
4. Front LH seat belt pre-tensioner
LH side air bag (satellite) sensor5. Air bag diagnosis sensor unit 6. Front LH side air bag module
7. Seat belt buckle switch (LH)
Seat belt buckle switch (RH)8. Occupant classification system control
unit
Occupant classification system sensor9. Front RH seat belt pre-tensioner
RH side air bag (satellite) sensor
Belt tension sensor
10. Front RH side air bag module 11. RH side curtain air bag module 12. LH side curtain air bag module
13. Front passenger air bag module 14. Driver air bag module
WHIA0329E

TROUBLE DIAGNOSIS
SRS-17
< SYMPTOM DIAGNOSIS >
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HOW TO CHANGE BETWEEN SELF-DIAGNOSIS MODE AND USER MODE WITH CONSULT-III
From User Mode to Diagnosis Mode
After selecting “AIR BAG” on the “SELECT SYSTEM” screen, User mode automatically changes to Diagnosis
mode.
From Diagnosis Mode to User Mode
To return to User mode from Diagnosis mode, touch “BACK” key of CONSULT-III until “SELECT SYSTEM”
appears, Diagnosis mode automatically changes to User mode.
HOW TO ERASE SELF-DIAGNOSIS RESULTS
NOTE:
If the memory in “SELF-DIAG [PAST]” is not erased, User mode will continue to show the system mal-
function by the operation of the warning lamp even if the malfunction is repaired completely.
• “SELF-DIAG [CURRENT]”
A current self-diagnosis result is displayed on the CONSULT-III screen in real time. After the malfunction is
repaired completely, no malfunction is detected on “SELF-DIAG [CURRENT]”.
• “SELF-DIAG [PAST]”
Return to the “SELF-DIAG [CURRENT]” CONSULT-III screen by touching “BACK” key of CONSULT-III and
select “SELF-DIAG [CURRENT]” in SELECT DIAG MODE. Touch “ERASE” in “SELF-DIAG [CURRENT]”
mode.
• “TROUBLE DIAG RECORD”
The memory of “TROUBLE DIAG RECORD” cannot be erased.
Self-Diagnosis Function (Without CONSULT-III)INFOID:0000000001703920
The reading of these results is accomplished using one of two modes —“User mode” and “Diagnosis mode”.
HOW TO CHANGE BETWEEN USER MODE AND SELF-DIAGNOSIS MODE WITHOUT CONSULT-
AIR BAG diagnostic mode Description
SELF-DIAG [CURRENT]A current Self-diagnosis result is displayed on the CONSULT-III screen in real time. This refers to a mal-
functioning part requiring replacement.
SELF-DIAG [PAST]Diagnosis results previously stored in the memory are displayed on the CONSULT-III screen. The
stored results will remain until the memory is erased.
TROUBLE DIAG RECORDWith TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be dis-
played on the CONSULT-III screen.
ECU DISCRIMINATED NO.The air bag diagnosis sensor unit for each vehicle model is assigned with its own, individual classifica-
tion number. This number will be displayed on the CONSULT-III screen, as shown. When replacing the
air bag diagnosis sensor unit, refer to the part number for the compatibility. After installation, replace-
ment with a correct unit can be checked by confirming this classification number on the CONSULT-III
screen.
The air bag diagnosis sensor unit discriminated number assigned is F636.
PASSENGER AIR BAGThe STATUS (readiness) of the front passenger air bag module is displayed. The STATUS displayed
(ON/OFF) depends on the signals supplied to the occupant classification system control module and
air bag diagnosis sensor unit. Refer to SRS-5, "
Occupant Classification System (OCS)" for more in-
formation.