2005 NISSAN X-TRAIL ignition

SB-20
SEAT BELT WARNING SYSTEM

Seat Belt Buckle Switch CheckEHS000GW
1. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) INPUT SIGNAL
1. Turn ignition switch “ON”.
2. Check voltage between time control unit connector M31 terminal
21 (BR/W) and ground.
OK or NG
OK >> Seat belt buckle switch (driver side) is OK.
NG >> GO TO 2.
2. CHECK SEAT BELT BUCKLE SWITCH HARNESS CONTINUITY
1. Turn ignition switch “OFF”.
2. Disconnect time control unit connector and seat belt buckle
switch (driver side) connector.
3. Check the following.
with power seat
–Check continuity between time control unit connector M31 termi-
nal 21 (BR/W) and seat belt buckle switch (driver side) connec-
tor B302 terminal 13 (R).
–Check continuity between time control unit connector M31 termi-
nal 21 (BR/W) and ground.
without power seat
–Check continuity between time control unit connector M31 termi-
nal 21 (BR/W) and seat belt buckle switch (driver side) connec-
tor B10 terminal 1 ( * ).
–Check continuity between time control unit connector M31 termi-
nal 21 (BR/W) and ground.
NOTE:
* :

OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between time control unit and seat belt buckle switch.
Terminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
21 (BR/W) GroundDriver side seat belt buckle switch
FastenBattery voltage
Driver side seat belt buckle switch
Unfasten0
PHIA0632E
21 (BR/W) – 13 (R) : Continuity should exist.
21 (BR/W) – Ground : Continuity should not exist.
21 (BR/W) – 1 ( * ) : Continuity should exist.
21 (BR/W) – Ground : Continuity should not exist.
LHD models :BR/W
RHD models :W/B
PHIA0633E

SB-22
SEAT BELT WARNING SYSTEM

Seat Belt Buckle Switch and Seat Pressure Switch CheckEHS000GX
1. CHECK TIME CONTROL UNIT INPUT SIGNAL
1. Turn ignition switch “ON”.
2. Check voltage between time control unit 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 >> Seat belt buckle switch (passenger side) is OK.
NG >> GO TO 2.
2. CHECK SEAT BELT BACKLE SWITCH CIRCUIT HARNESS CONTINUITY
1. Turn ignition switch “OFF”.
2. Disconnect time control unit connector and seat belt buckle
switch (passenger side) connector.
3. Check the following.
with power seat
–Check continuity between time control unit connector M31 termi-
nal 22 (G/OR) and seat belt buckle switch (passenger side) con-
nector B352 terminal 13 (R).
–Check continuity between time control unit connector M31 termi-
nal 22 (G/OR) and ground.
without power seat
–Check continuity between time control unit connector M31 termi-
nal 22 (G/OR) and seat belt buckle switch (passenger side) con-
nector B113 terminal 1 (G/OR).
–Check continuity between time control unit connector M31 termi-
nal 22 (G/OR) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between time control unit and seat belt buckle switch.
Terminal
(wire color)
Condition Voltage (V)
(+) (–)
22 (G/OR) GroundPassenger side seat belt buckle
switch Fasten and seat pressure
switch ON.Battery voltage
Passenger side seat belt buckle
switch Unfasten and seat pres-
sure switch OFF.0
PHIA0630E
22 (G/OR) – 13 (R) : Continuity should exist.
22 (G/OR) – Ground : Continuity should not exist.
22 (G/OR) – 1 (G/OR) : Continuity should exist.
22 (G/OR) – Ground : Continuity should not exist.
PHIA0631E

SB-24
SEAT BELT WARNING SYSTEM

Vehicle Speed Signal InspectionEHS000GZ
1. VEHICLE SPEED INPUT SIGNAL INSPECTION
Check the signal between control unit connector M31 terminal 36 (*) and ground with oscilloscope when vehi-
cle speed is approx. 40 km/h (25 MPH).
OK or NG
OK >> Vehicle speed signal is OK.
NG >> GO TO 2.
2. HARNESS CONTINUITY INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect time control unit connector and combination meter
harness connector.
3. Check continuity between combination meter connector M44
terminal 33 (L/W) and time control unit M31 terminal 36 (L/W).
4. Check continuity between combination meter connector M44
terminal 33 (L/W) and ground.
OK or NG
OK >> Vehicle speed signal circuit is OK. Further inspection is necessary. Refer to DI-22, "How to Per-
form Trouble Diagnosis" .
NG >> Replace or replace harness between combination meter and time control unit.
Terminal
Voltag e
(+) (–)
36
(L/B: A/T models)
(L/Y: M/T models)Ground
PHIA0647EELF1080D
33 (L/W) – 36 (L/W) : Continuity should exist.
33 (L/W) – Ground : Continuity should not exist.
PHIA0640E

PRECAUTIONS
SRS-3
C
D
E
F
G
I
J
K
L
MA
B
SRS

PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EHS001B0
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 harnesses or
harness connectors.
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 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.

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.
Wiring Diagrams and Trouble DiagnosisEHS001NG
When you read wiring diagrams, refer to the following:

GI-14, "How to Read Wiring Diagrams" in GI section

PG-2, "POWER SUPPLY ROUTING" in PG section
When you perform trouble diagnosis, refer to the following:

GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section

GI-23, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section
Check for any service bulletins before servicing the vehicle.

SRS-6
SUPPLEMENTAL RESTRAINT SYSTEM (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 posi-
tion.
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-16
TROUBLE DIAGNOSIS

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 completely.

“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 “User mode” and “Diagnosis mode”.

After a malfunction is repaired, turn ignition switch ON. Diagnosis mode returns to the User mode. At that
time, the self-diagnostic result is cleared.
HOW TO CHANGE SELF-DIAGNOSIS MODE WITHOUT CONSULT-II
HOW TO ERASE SELF-DIAGNOSIS RESULTS
After a malfunction is repaired, turn the ignition switch OFF for at least one second, then back ON. Diagnosis
mode returns to the User mode. At that time, the self-diagnostic result is cleared.
SRS701
PHIA0709E

TROUBLE DIAGNOSIS
SRS-17
C
D
E
F
G
I
J
K
L
MA
B
SRS

SRS Operation CheckEHS000MZ
DIAGNOSTIC PROCEDURE 1
Checking Air Bag Operation by Using “AIR BAG” Warning Lamp — User Mode
1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.
2. Compare the SRS air bag warning lamp blinking pattern with the
examples.
BF-1845D

TROUBLE DIAGNOSIS
SRS-19
C
D
E
F
G
I
J
K
L
MA
B
SRS

Trouble Diagnosis with CONSULT–IIEHS000O8
DIAGNOSTIC PROCEDURE 2
Inspecting SRS Malfunctioning Parts by Using CONSULT-II — DIAGNOSIS MODE
1. Turn ignition switch OFF.
2. Connect CONSULT-II to the data link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “AIR BAG”.
If “AIR BAG” is not indicated, GI-35, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
6. On the “self-diagnosis mode selection” screen of CONSULT-II,
select the desired “self-diagnosis mode key”.
SIIA1249E
BCIA0029E
BCIA0030E
SRS697