2001 NISSAN X-TRAIL sensor

SEAT BELT WARNING SYSTEM
SB-15
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SB
4.CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect seat belt buckle switch (driver side) harness connec-
tor.
3. Check harness continuity between seat belt buckle switch
(driver side) harness connector B10 terminal 2 (B) and ground.
OK or NG
OK >> Replace time control unit.
NG >> Repair or replace harness.
Seat Belt Buckle Switch Inspection (Passenger Side)EHS000GX
1.CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) INPUT SIGNAL
1. Turn ignition switch “ON”.
2. Check voltage between time control unit harness connector M31
terminal 22(G/OR) and ground.
NOTE:
When performing the following procedure, a person is sitting on the
passenger side seat. (As a result, the seat pressure sensor is turned
ON.)
OK or NG
OK >> System is OK.
NG >> GO TO 2.
2.HARNESS CONTINUITY INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect time control unit harness connector and seat belt
buckle switch (passenger side) harness connector.
3. Check the following.
–Check continuity between time control unit harness connector
M31 terminal 22 (G/OR) and seat belt buckle switch (passenger
side) harness connector B113 terminal 1 (G/OR).
–Check continuity between time control unit harness connector
M31 terminal 22 (G/OR) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness. Continuity should exist.
SHIA0310E
Terminal Condition
(passenger side seat belt
buckle switch)Voltage [V]
(+) (–)
22 (G/OR) GroundFasten Battery voltage
Unfasten 0
SHIA0314E
Continuity should exist.
Continuity should not exist.
SHIA0316E

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

PRECAUTIONS
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SRS
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.

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS-5
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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-14
TROUBLE DIAGNOSIS
CONSULT-II Function
EHS000O6
DIAGNOSIS MODE FOR CONSULT-II
●“SELF-DIAG [CURRENT]”
A current Self-diagnosis result (also indicated by the number of warning lamp flashes in the Diagnosis
mode) is displayed on the CONSULT-II screen in real time. This refers to a malfunctioning part requiring
repairs.
●“SELF-DIAG [PAST]”
Diagnosis results previously stored in the memory are displayed on the CONSULT-II screen. The stored
results are not erased until memory erasing is executed.
●“TROUBLE DIAG RECORD”
With TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be dis-
played on the CONSULT-II screen.
●“ECU DISCRIMINATED NO.”
The diagnosis sensor unit for each vehicle model is assigned with its own, individual classification num-
ber. Refer to SRS-40, "
ECU DISCRIMINATED NO." This number will be displayed on the CONSULT-II
screen. When replacing the diagnosis sensor unit, refer to the part number for the compatibility. After
installation, replacement with a correct unit can be checked by confirming this classification number on the
CONSULT-II screen.
HOW TO CHANGE SELF-DIAGNOSIS MODE WITH CONSULT-II
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-II until “SELECT SYSTEM”
appears, Diagnosis mode automatically changes to User mode.
SRS803
SRS804

TROUBLE DIAGNOSIS
SRS-17
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SRS
Warning lamp examples
“AIR BAG” warning lamp operation-User mode- SRS condition Reference item
●No malfunction is detected.
●No further action is necessary.—
●The system is malfunctioning and
need to be repaired as indicated.Go to SRS-18, "DIAGNOSTIC
PROCEDURE 2" or SRS-27,
"DIAGNOSTIC PROCEDURE 5" .
●Air bag is deployed.
●Seat belt pre-tensioner is deployed.Go toSRS-47, "
COLLISION DIAG-
NOSIS" .
●Diagnosis sensor unit is malfunction-
ing.
●Air bag power supply circuit is mal-
functioning.
●SRS air bag warning lamp circuit is
malfunctioning.Go to SRS-27, "
Trouble Diagnoses:
“AIR BAG” Warning Lamp Does Not
Turn Off" .
●Diagnosis sensor unit is malfunction-
ing.
●Air bag warning lamp circuit is mal-
functioning.Go to SRS-28, "
Trouble Diagnoses:
“AIR BAG” Warning Lamp Does Not
Turn On" .
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E

TROUBLE DIAGNOSIS
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SRS
a. Touch “SELF-DIAG [CURRENT]”.
●Diagnostic code is displayed on “SELF-DIAG [CURRENT]”.
i. If the malfunction is displayed in the “SRS Operation Check (Air bag warning lamp blinking) but no mal-
function is displayed in the “SELF-DIAG [CURRENT]”, the following possibilities shall be checked. Refer
to SRS-20, "
DIAGNOSTIC PROCEDURE 3"
●Low battery voltage (Less than 9V)
●After the malfunction part is repaired, the diagnosis results in “SELF-DIAG [PAST]” has not been
erased.
●An intermittent malfunction has been stored in the past.
NOTE:
Intermittent malfunction is a malfunction that has occurred once in the past, but soon recovered.
b. Touch “SELF-DIAG [PAST].
●The diagnostic code is displayed until erasing the memory in
the “SELF-DIAG [CURRENT]”.
c. Touch “TROUBLE DIAG RECORD”.
●The diagnosis results (malfunction parts stored in the diagno-
sis sensor unit) stored in the self-diagnosis results are dis-
played.
●The memory of “TROUBLE DIAG RECORD” cannot be
erased.
7. Each diagnostic code is displayed. Refer to SRS-21, "
DIAG-
NOSTIC CODE CHART"
8. Touch “PRINT,” if required.
9. Based on each diagnosis result, repair or replace the malfunc-
tion parts.
CAUTION:
Be sure to start the work after the following steps. Turn the
ignition switch OFF, and disconnect both battery cables.
Then wait for at least 3 minutes.
SHIA0203E
SHIA0181E
SHIA0182E
SHIA0180E

TROUBLE DIAGNOSIS
SRS-21
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DIAGNOSTIC CODE CHARTEHS000O9
Diagnostic item ExplanationRepair order
“Recheck SRS at each replacement”
NO DTC IS
DETECTED.When malfunction is
indicated by the “AIR
BAG” warning lamp in
User mode.
●Low battery voltage (Less than 9V)●Go to SRS-20, "DIAGNOSTIC PRO-
CEDURE 3" after charging the bat-
tery.
●Self-diagnostic result “SELF-DIAG
[PAST]” (previously stored in the
memory) might not be erased after
repair.
●Intermittent malfunction has been
detected in the past.
●Go to SRS-20, "DIAGNOSTIC PRO-
CEDURE 3" .
●No malfunction is detected. —
DRIVER AIRBAG
MODULE
[OPEN]
●Driver air bag module circuit is open (including the spiral cable). 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the driver air bag module.
(Before disposal, it must be
deployed.)
4. Replace the spiral cable.
5. Replace the diagnosis sensor unit.
6. Replace the related harness. DRIVER AIRBAG
MODULE
[VB-SHORT]
●Driver air bag module circuit is shorted to a power supply circuit
(including the spiral cable).
DRIVER AIRBAG
MODULE
[GND-SHORT]
●Driver air bag module circuit is shorted to ground (including the
spiral cable).
DRIVER AIRBAG
MODULE
[SHORT]
●Driver air bag module circuit is shorted between lines.
ASSIST A/B MODULE
[OPEN]
●Front passenger air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the front passenger air bag
module. (Before disposal, it must be
deployed.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness. ASSIST A/B MODULE
[VB-SHORT]
●Front passenger air bag module circuit is shorted to a power
supply circuit.
ASSIST A/B MODULE
[GND-SHORT]
●Front passenger air bag module circuit is shorted to ground.
ASSIST A/B MODULE
[SHORT]
●Front passenger air bag module circuit is shorted between lines.
SIDE MODULE LH
[OPEN]
●Front LH side air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the front LH setback
assembly (front LH side air bag
module).
(Before disposal, it must be
deployed.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness. SIDE MODULE LH
[VB-SHORT]
●Front LH side air bag module circuit is shorted to a power sup-
ply circuit.
SIDE MODULE LH
[GND-SHORT]
●Front LH side air bag module circuit is shorted to ground.
SIDE MODULE LH
[SHORT]
●Front LH side air bag module circuit is shorted between lines.
SIDE MODULE RH
[OPEN]
●Front RH side air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the front RH setback
assembly (front RH side air bag
module).
(Before disposal, it must be
deployed.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness. SIDE MODULE RH
[VB-SHORT]
●Front RH side air bag module circuit is shorted to a power sup-
ply circuit.
SIDE MODULE RH
[GND-SHORT]
●Front RH side air bag module circuit is shorted to ground.
SIDE MODULE RH
[SHORT]
●Front RH side air bag module circuit is shorted between lines.