2001 NISSAN X-TRAIL ignition

SEAT BELT WARNING SYSTEM
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SB
Seat belt Warning Lamp Inspection (Passenger Side)EHS000GU
1.FUSE INSPECTION
Check if 10A fuse [No.11, located in fuse block (J/B)] is blown.
OK or NG
OK >> GO TO 2.
NG >> Replace the 10A fuse [No.11, located in fuse block (J/B)].
2.POWER SUPPLY CIRCUIT
1. Disconnect seat belt warning lamp (passenger side) connector.
2. Turn ignition switch “ON”.
3. Check voltage between seat belt warning lamp harness con-
nector M100 terminal 1 (W/L) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.HARNESS CONTINUITY INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect seat belt warning lamp connector and time control
unit connector.
3. Check the following.
–Check continuity between seat belt warning lamp harness con-
nector M100 terminal 2 (W/G) and time control unit harness con-
nector M30 terminal 15 (W/G).
–Check continuity between seat belt warning lamp harness con-
nector M100 terminal 2 (W/G) and ground.
OK or NG
OK >> GO TO 4
NG >> Replacer or repair the harness.
4.SEAT BELT WARNING LAMP (PASSENGER SIDE) CHECK
Check continuity between seat belt warning lamp (passenger side)
harness connector M100 terminal 1 and 2.
OK or NG
OK >> Replace time control unit.
NG >> Replace seat belt warning lamp (passenger side).
Terminal
Vo lta g e [ V ] (+) (–)
ConnectorTerminal
(Wire color)ConnectorTerminal
(Wire color)
M100 1 (W/L) Ground Battery voltage
SHIA0307E
Continuity should exist.
Continuity should not exist.
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Terminals
Continuity
(+) (–)
12No
21Yes
PIIA4860E

SB-14
SEAT BELT WARNING SYSTEM
Seat Belt Buckle Switch Inspection (Driver side)
EHS000GW
1. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) INPUT SIGNAL
1. Turn ignition switch “ON”.
2. Check voltage between time control unit harness connector M31
terminal 21 (BR/W) and ground.
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 (driver side) harness connector.
3. Check the following.
–Check continuity between time control unit harness connector
M31 terminal 21 (BR/W) and seat belt buckle switch (driver side)
harness connector B10 terminal 1 (BR/W).
–Check continuity between time control unit harness connector
M31 terminal 21 (BR/W) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
Check continuity between seat belt buckle switch (driver side) har-
ness connector B10 terminals 1 and 2.
OK or NG
OK >> GO TO 4.
NG >> Replace seat belt buckle switch (driver side).
Terminal (Wire color) Condition (Driver
side seat belt
buckle switch)Vo l ta g e [V ]
(+) (–)
21 (BR/W) GroundFasten Battery voltage
Unfasten 0
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Continuity should exist.
Continuity should not exist.
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TerminalCondition (Driver side
seat belt buckle
switch)Continuity
1 2Fasten No
Unfasten Yes
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SEAT BELT WARNING SYSTEM
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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.
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Terminal Condition
(passenger side seat belt
buckle switch)Voltage [V]
(+) (–)
22 (G/OR) GroundFasten Battery voltage
Unfasten 0
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Continuity should exist.
Continuity should not exist.
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SB-16
SEAT BELT WARNING SYSTEM
3. CHECK SEAT BELT BUCKLE SWITCH INPUT(PASSENGER SIDE)
1. Disconnect seat pressure switch harness connector.
2. Check continuity between seat belt buckle switch (passenger
side) harness connector B113 terminal 1 (G/OR) and seat belt
pressure switch harness connector B301 terminal 3.
OK or NG
OK >> GO TO 4.
NG >> Replace seat belt buckle switch (passenger side).
4. CHECK SEAT BUCKLE SWITCH GROUND CIRCUIT
Check continuity between seat buckle switch harness connector
B113 terminal 2 (B) and ground.
OK or NG
OK >> GO TO SB-16, "Seat Pressure Switch Inspection" .
NG >> Repair or replace harness.
Seat Pressure Switch InspectionEHS000GY
1. CHECK SEAT PRESSURE SWITCH
1. Turn ignition switch “OFF”.
2. Disconnect seat pressure switch harness connector.
3. Check continuity between seat pressure switch harness connec-
tor B301 terminal 3 and 4.
OK or NG
OK >> GO TO 2.
NG >> Replace seat pressure switch.
Terminal (wire color)Condition (pas-
senger side seat
buckle switch)Continuity
1 (G/OR) 3Fasten No
Unfasten Yes
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Continuity should exist.
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Terminal (wire color)Condition
(seat pressure switch)Continuity
34ON Yes
OFF No
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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
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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)
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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

TROUBLE DIAGNOSIS
SRS-15
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SRS
HOW TO ERASE SELF-DIAGNOSIS RESULTS
●“SELF-DIAG [CURRENT]”
A current Self-diagnosis result is displayed on the CONSULT-II 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-II screen by touching “BACK” key of CONSULT-II and
select “SELF-DIAG [CURRENT]” in SELECT DIAG MODE. Touch “ERASE” in “SELF-DIAG [CURRENT]”
mode.
NOTE:
If the memory of the malfunction in “SELF-DIAG [PAST]” is not erased, the User mode shows the
system malfunction by the operation of the warning lamp even if the malfunction is repaired com-
pletely.
●“TROUBLE DIAG RECORD”
The memory of “TROUBLE DIAG RECORD” cannot be erased
Self-Diagnosis Function (Without CONSULT-II) EHS000O7
●The reading of these results is accomplished using one of two modes — “User mode” and “Diagnosis
mode”.
●After a malfunction is repaired, turn the ignition switch "OFF" for at least one second, the back "ON". Diag-
nosis mode returns to the User mode. At that time, the self-diagnostic result is cleared.
HOW TO CHANGE SELF-DIAGNOSIS MODE
HOW TO ERASE SELF-DIAGNOSIS RESULTS
After a malfunction is repaired, turn the ignition switch “OFF” for at least one second, then back “ON”. Diagno-
sis mode returns to the User mode. At that time, the self-diagnostic result is cleared.
SRS701
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