NISSAN X-TRAIL 2001 Service Repair Manual

SEAT BELT WARNING SYSTEM
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SB
3.HARNESS CONTINUITY INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect time control unit harness connector and combination
meter harness connector.
3. Check the following.
LHD models
–Check continuity between combination meter harness connec-
tor M46 terminal 50 (*) and time control unit M31 terminal 36 (*).
–Check continuity between combination meter harness connector
M46 terminal 50 (*) and ground.
RHD models
–Check continuity between combination meter harness connec-
tor M46 terminal 63 (*) and time control unit M31 terminal 36 (*).
–Check continuity between combination meter harness connector
M46 terminal 63 (*) and ground.
NOTE:
*: Wire color is different depending on vehicle. Each wire color are as follows:
OK or NG
OK >> Replace combination meter.
NG >> Replace or replace harness.Continuity should exist.
Continuity should not exist.
Continuity should exist.
Continuity should not exist.
Vehicle Wire color
A/T models L/W
M/T models with gasoline engine L/Y
Diesel engine models L/B
SHIA0322E

SB-20
SEAT BELT WARNING SYSTEM

SRS-1
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
H RESTRAINTS
CONTENTS
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SECTION
A
B
SRS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
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
Trouble Diagnosis Precaution .................................. 3
PREPARATION ........................................................... 4
Special Service Tool ................................................. 4
Commercial Service Tool ......................................... 4
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ....... 5
SRS Configuration ................................................... 5
Front Seat Belt Pre-tensioner with Load Limiter ...... 5
Front Side Air Bag .................................................... 6
TROUBLE DIAGNOSIS .............................................. 7
Trouble Diagnosis Introduction ................................. 7
DIAGNOSIS FUNCTION ....................................... 7
HOW TO PERFORM TROUBLE DIAGNOSES
FOR QUICK AND ACCURATE REPAIR ............... 7
WORK FLOW ........................................................ 7
SRS Components Parts Location ............................. 9
Wiring Diagram — SRS — /LHD models ............... 10
Wiring Diagram-SRS-/RHD models ....................... 12
CONSULT-II Function ............................................ 14
DIAGNOSIS MODE FOR CONSULT-II ............... 14
HOW TO CHANGE SELF-DIAGNOSIS MODE
WITH CONSULT-II .............................................. 14
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 15
Self-Diagnosis Function (Without CONSULT-II) ..... 15
HOW TO CHANGE SELF-DIAGNOSIS MODE ... 15
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 15
SRS Operation Check ............................................ 16
DIAGNOSTIC PROCEDURE 1 ........................... 16
Trouble Diagnoses With CONSULT–II ................... 18
DIAGNOSTIC PROCEDURE 2 ........................... 18
DIAGNOSTIC PROCEDURE 3 ........................... 20
DIAGNOSTIC CODE CHART ................................ 21
Trouble Diagnoses Without CONSULT-II ............... 23
DIAGNOSTIC PROCEDURE 4 ........................... 23
WARNING LAMP FLASH CODE CHART ........... 24Trouble Diagnoses: “AIR BAG” Warning Lamp Does
Not Turn Off ............................................................ 27
DIAGNOSTIC PROCEDURE 5 ........................... 27
Trouble Diagnoses: “AIR BAG” Warning Lamp Does
Not Turn On ............................................................ 28
DIAGNOSTIC PROCEDURE 6 ........................... 28
DRIVER AIR BAG MODULE .................................... 29
Removal and Installation/With 4-Spoke Steering
Wheel ..................................................................... 29
REMOVAL ........................................................... 29
INSTALLATION ................................................... 30
Removal and Installation/With 3-Spoke Steering
Wheel ..................................................................
... 31
REMOVAL ........................................................... 31
INSTALLATION ................................................... 32
SPIRAL CABLE ........................................................ 33
Removal and Installation ........................................ 33
REMOVAL ........................................................... 33
INSTALLATION ................................................... 34
Components Inspection .......................................... 34
FRONT PASSENGER AIR BAG MODULE .............. 35
Removal and Installation ........................................ 35
REMOVAL ........................................................... 35
INSTALLATION ................................................... 35
FRONT SIDE AIR BAG MODULE ............................ 36
Removal and Installation ........................................ 36
REMOVAL ........................................................... 36
INSTALLATION ................................................... 36
SIDE AIR BAG (SATELLITE) SENSOR ................... 38
Removal and Installation ........................................ 38
REMOVAL ........................................................... 38
INSTALLATION ................................................... 38
FRONT SEAT BELT PRE-TENSIONER ................... 39
Removal and Installation ........................................ 39
DIAGNOSIS SENSOR UNIT ..................................... 40
Removal and Installation ........................................ 40
REMOVAL ........................................................... 40
INSTALLATION ................................................... 40
ECU DISCRIMINATED NO. ................................ 40
DISPOSAL OF AIR BAG MODULE AND SEAT BELT

SRS-2
PRE-TENSIONER .................................................. ... 41
Caution for Air Bag Module and Seat Belt Pre-ten-
sioner ...................................................................... 41
CHECKING DEPLOYMENT TOOL ..................... 41
DEPLOYMENT PROCEDURES FOR AIR BAG
MODULE (OUTSIDE OF VEHICLE) ................... 42
DEPLOYMENT PROCEDURES FOR SEAT
BELT PRE-TENSIONER (OUTSIDE OF VEHI-
CLE) .................................................................... 45
DEPLOYMENT OF AIR BAG MODULE AND
SEAT BELT PRE-TENSIONER WHILE
MOUNTED IN VEHICLE ..................................... 45
DISPOSING OF AIR BAG MODULE AND SEAT
BELT PRE-TENSIONER ..................................... 46COLLISION DIAGNOSIS .......................................... 47
For Frontal Collision ................................................ 47
WHEN SRS (EXCEPT THE FRONT SIDE AIR
BAG) IS ACTIVATED IN A COLLISION: .............. 47
WHEN SRS IS NOT ACTIVATED IN A COLLI-
SION: ................................................................... 47
SRS INSPECTION (FOR FRONTAL COLLI-
SION) ................................................................... 47
For Side Collision .................................................... 48
WHEN THE SIDE AIR BAG IS ACTIVATED IN
THE SIDE COLLISION: ....................................... 48
WHEN SRS IS NOT ACTIVATED IN THE SIDE
COLLISION: ......................................................... 48
SRS INSPECTION (FOR SIDE COLLISION) ...... 49

PRECAUTIONS
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EHS000QI
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
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 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 harness connec-
tors.
Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” ServiceEHS000BH
●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
minutes.
For approximately 3 minutes after the cables is 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.
●Diagnosis sensor unit must always be installed with their arrow marks “⇐” pointing towards the front of the
vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities or rust before instal-
lation 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 place front side air bag module standing with stud bolt side setting bottom.
●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.
Trouble Diagnosis PrecautionEHS000BI
When you read wiring diagrams, refer to the followings:
●“HOW TO READ WIRING DIAGRAMS” in GI section
●PG-2, "POWER SUPPLY ROUTING" in PG section
When you perform trouble diagnosis, refer to the followings:
●“HOW TO FOLLOW TEST GROUP IN TROUBLE DIAGNOSIS” in GI section
●“HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT” in GI section
Check for any service bulletins before servicing the vehicle.

SRS-4
PREPARATION
PREPARATION
PFP:00002
Special Service ToolEHS000CF
Commercial Service ToolEHS000CG
Tool number
Tool nameApplication
KV99105300
Air bag module bracketAnchoring air bag module
KV99106400
Deployment toolDisposing of air bag module and front seat
belt pre-tensioner
KV99109700
●Deployment tool adapter for front
seat belt pre-tensioner
●Deployment tool adapter for
driver air bag module
●Connection between the deployment tool
and front seat belt pre-tensioner
●Connection between the deployment tool
and driver air bag module
KV99109000
Deployment tool adapters for side
air bagConnection between the deployment tool
and side air bag module
KV99108300
Deployment tool adapters for front
passenger air bagConnection between the deployment tool
and front passenger air bag module
S-NT354
S-NT357
SHIA0038J
ZZA1190D
ZZA1166D
Tool name Application
Tamper resistant torx socket Size:T30
S-NT757

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
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SRS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)PFP:28556
SRS ConfigurationEHS000CH
The air bag deploys if the diagnosis sensor unit activates 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 and front passenger air bag module are activated in a frontal col-
lision but not in a side collision.
SRS configurations which are activated for some collision modes are as follows;
Front Seat Belt Pre-tensioner with Load LimiterEHS000CI
The seat belt pre-tensioner system with load limiter is installed to
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.
PHIA0037E
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 — —×
SRS444

SRS-6
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Front Side Air Bag
EHS000CJ
Front side air bag is built-in type.
The front seat backs with built-in type side air bag have the labels
shown in figure at right.
PHIA0039E

TROUBLE DIAGNOSIS
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SRS
TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionEHS000CL
CAUTION:
●Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harness can be identified by yellow and/or orange harness connector.
●Do not attempt to 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-diagnosis results can be read by using “AIR BAG” warning lamp and/or CONSULT-II.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system mal-
function 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-II are as follows:
NOTE:
Seat belt pre-tensioner malfunction is indicated by “AIR BAG” warning lamp.
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Information From Customer
WHAT..... Vehicle model
WHEN..... Date, Frequencies
WHERE..... Road conditions
HOW..... Operating conditions, Symptoms
Preliminary Check
Check that the following parts are in good order.
●Battery Refer to SC-3, "BATTERY" .
●Fuse Refer to PG-2, "POWER SUPPLY ROUTING" .
●System component-to-harness connections
WORK FLOW
NOTE:
Seat belt pre-tensioner malfunction is indicated by “AIR BAG” warning lamp.
User mode Diagnosis mode Display type
“AIR BAG” warning lamp X X ON-OFF operation
CONSULT-II — X Monitoring

SRS-8
TROUBLE DIAGNOSIS
*1:SRS-7*2:SRS-16*3:SRS-23
*4:SRS-27
PHIA0297E