2003 NISSAN X-TRAIL ECU

SRS-1
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
H RESTRAINTS
CONTENTS
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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
Wiring Diagrams and Trouble Diagnosis .................. 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 5
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ....... 6
SRS Configuration ................................................... 6
Front Seat Belt Pre-tensioner with Load Limiter ...... 6
Front Side Air Bag .................................................... 7
TROUBLE DIAGNOSIS .............................................. 8
Trouble Diagnosis Introduction ................................. 8
DIAGNOSIS FUNCTION ....................................... 8
HOW TO PERFORM TROUBLE DIAGNOSES
FOR QUICK AND ACCURATE REPAIR ............... 8
WORK FLOW ........................................................ 9
Component Parts Location ..................................... 10
Wiring Diagram — SRS — /LHD models ................ 11
Wiring Diagram — SRS — /RHD models .............. 13
CONSULT-II Function ............................................ 15
DIAGNOSIS MODE FOR CONSULT-II ............... 15
HOW TO CHANGE SELF-DIAGNOSIS MODE
WITH CONSULT-II .............................................. 15
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 16
Self-Diagnosis Function (Without CONSULT-II) ..... 16
HOW TO CHANGE SELF-DIAGNOSIS MODE
WITHOUT CONSULT-II ...................................... 16
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 16
SRS Operation Check ............................................ 17
DIAGNOSTIC PROCEDURE 1 ........................... 17
Trouble Diagnosis with CONSULT–II ..................... 19
DIAGNOSTIC PROCEDURE 2 ........................... 19
DIAGNOSTIC PROCEDURE 3 ........................... 21
Diagnostic Code Chart ........................................... 22
Trouble Diagnosis without CONSULT-II ................. 24
DIAGNOSTIC PROCEDURE 4 ........................... 24WARNING LAMP FLASH CODE CHART ........... 25
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn Off ............................................................ 28
DIAGNOSTIC PROCEDURE 5 ........................... 28
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn On ............................................................ 29
DIAGNOSTIC PROCEDURE 6 ........................... 29
DRIVER AIR BAG MODULE .................................... 30
Removal and Installation ........................................ 30
REMOVAL ........................................................... 30
INSTALLATION ................................................... 31
SPIRAL CABLE ........................................................ 33
Removal and Installation ........................................ 33
REMOVAL ........................................................... 33
INSTALLATION ................................................... 34
FRONT PASSENGER AIR BAG MODULE .............. 35
Removal and Installation ........................................ 35
REMOVAL ........................................................... 35
INSTALLATION ................................................... 36
FRONT SIDE AIR BAG MODULE ............................ 37
Removal and Installation ........................................ 37
REMOVAL ........................................................... 37
INSTALLATION ................................................... 38
SIDE AIR BAG (SATELLITE) SENSOR ................... 39
Removal and Installation ........................................ 39
REMOVAL ........................................................... 39
INSTALLATION ................................................... 39
FRONT SEAT BELT PRE-TENSIONER ................... 40
Removal and Installation ........................................ 40
DIAGNOSIS SENSOR UNIT ..................................... 41
Removal and Installation ........................................ 41
REMOVAL ........................................................... 41
INSTALLATION ................................................... 41
ECU DISCRIMINATED NO. ................................ 41
DISPOSAL OF AIR BAG MODULE AND SEAT BELT
PRE-TENSIONER ..................................................... 42
Caution for Air Bag Module and Seat Belt Pre-ten-
sioner ...................................................................... 42
CHECKING DEPLOYMENT TOOL ..................... 42
DEPLOYMENT PROCEDURES FOR AIR BAG

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

TROUBLE DIAGNOSIS
SRS-15
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SRS

CONSULT-II FunctionEHS000O6
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 number. This number will
be displayed on the CONSULT-II screen, as shown. 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.
After repair, make sure the discriminated number of diagnosis
sensor unit installed to vehicle are same. Refer to SRS-41,
"ECU DISCRIMINATED NO." .
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, then diagnosis mode automatically changes to User mode.
PHIA0218E
SRS803
SRS804

FRONT SIDE AIR BAG MODULE
SRS-37
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SRS

FRONT SIDE AIR BAG MODULEPFP:K8EH0
Removal and InstallationEHS000DA
REMOVAL
CAUTION:

Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.

Always work from the rear of the front side air bag module.
1. Pull up the seatback trim.
2. Remove the nuts securing the inner cloth with seatback frame. Then pull up the inner cloth.
3. Remove the side air bag module fixing nuts, and remove the front side air bag module.
CAUTION:

When using a clip removal tool to remove the seatback
board, take care not to damage the harness for front side air
bag module.

Always place the front side air bag module standing with
the stud bolt side setting bottom.

Do not insert any foreign objects (screwdrivers) into front
side air bag module

Do not attempt to disassemble front side air bag module.

Do not use old nuts after removal; replace with new bolts.

Replace side air bag module if it has been dropped or sus-
tained an impact.

Do not expose the front side air bag module to tempera-
tures exceeding 90°C (194°F).

Do not allow oil, grease or water to come in contact with the
front side air bag module.

After front side air bag module inflates, all parts of front
seatback frame (including front seatback flame) should be
replaced.
PHIA0028E
SRS623
SBF814E

DIAGNOSIS SENSOR UNIT
SRS-41
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SRS

DIAGNOSIS SENSOR UNITPFP:28556
Removal and InstallationEHS000DD
REMOVAL
CAUTION:
Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least 3
minutes.
1. Disconnect each harness connector for the air bag module and seat belt pre-tensioner.
2. Remove center console. Refer to IP-11, "
Removal and Installation" .
3. Disconnect diagnosis sensor unit connector.
4. Remove ground bolt and diagnosis sensor unit fixing bolts.
CAUTION:

Do not use old bolts. Replace with new ones.

Check diagnosis sensor unit brackets to ensure it is free of
deformities, dents, cracks or rust. If it shows any visible
signs of damage, replace it with new one.

Replace diagnosis sensor unit if it has been dropped or sustained an impact.
INSTALLATION
Install in the reverse order of removal.
CAUTION:

Check the diagnosis sensor unit for proper installation.

After replacement of diagnosis sensor unit, perform self-diagnosis to check that no malfunction is
detected. Refer to SRS-17, "
SRS Operation Check" .
ECU DISCRIMINATED NO.
After replacing air bag sensor unit, confirm control unit discriminated number.Ground bolt:
: 6.9 N·m (0.7 kg-m, 61 in-lb)
Diagnosis sensor unit fixing bolt:
: 24.5 N·m (2.5 kg-m, 18.1 ft-lb)
PHIA0735E
Specification ECU discriminated No.
Model with driver and passenger air bags and seat belt pre-tensioner AA12
Model with driver and passenger air bags, seat belt pre-tensioner and front side air bag AA01

DISPOSAL OF AIR BAG MODULE AND SEAT BELT PRE-TENSIONER
SRS-43
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SRS

Air Bag Deployment Tool Lamp Illumination Chart (Battery Connected)
*: If this lamp glows red, the tool is connected to the battery incorrectly. Reverse the connections and make sure the lamp glows green.
DEPLOYMENT PROCEDURES FOR AIR BAG MODULE (OUTSIDE OF VEHICLE)
Unless the vehicle is being scrapped, deploying the air bag in the
vehicle is not recommended. This may cause damage to the vehicle
interior.
Anchor air bag module bracket (SST: KV99105300) in a vise
secured to a firm foundation during deployment.
Deployment of Driver Air Bag Module (Outside of Vehicle)
1. Using wire, secure air bag module to air bag module bracket
(SST: KV99105300) at two places.
CAUTION:
Use wire of at least 1 mm (0.04 in) diameter.
2. Firmly secure air bag module bracket (SST: KV99105300) with
air bag module attached in a vise.
3. Connect deployment tool adapter (SST: KV99109700) to
deployment tool (SST: KV99106400) to air bag module connec-
tor.
4. Connect red clip of deployment tool to battery positive terminal
and black clip to negative terminal.
Switch operationLeft side lamp, green*
“AIR BAG CONNECTOR
VOLTAGE”Right side lamp, green*
“DEPLOYMENT TOOL
POWER”
OFF OFF ON
ON ON ON
SRS232-E
SRS233-D
PHIA0004E
SRS235-D

SRS-44
DISPOSAL OF AIR BAG MODULE AND SEAT BELT PRE-TENSIONER

5. The lamp on the right side of the tool, marked “deployment tool power”, should glow green, not red.
6. Press the button on the deployment tool. The left side lamp on the tool, marked “air bag connector volt-
age”, will illuminate and the air bag module will deploy.
CAUTION:
When deploying the driver air bag module, stand at least 5 m (16 ft) away from the air bag module.
Deployment of Front Passenger Air Bag Module (Outside of Vehicle)
1. Make an 8.5 mm (0.335 in) diameter hole in air bag module
bracket (SST: KV99105300) at the position shown in figure at
right.
2. Firmly secure air bag module bracket (SST: KV99105300) in a
vise.
3. Match the two holes in air bag module bracket (held in vise) and
front passenger air bag module and fix them with two bolts [M8 ×
25 - 30 mm (0.98 - 1.18 in)].
CAUTION:
If a gap exists between front passenger air bag module and
air bag module bracket, use a piece of wood inserted in the
gap to stabilize the air bag module.
4. Connect deployment tool adapter (SST: KV99108300) to
deployment tool (SST: KV99106400) connector and front pas-
senger air bag module connector.
5. Connect red clip of deployment tool to battery positive terminal
and black clip to negative terminal.
6. The lamp on the right side of the tool, marked “deployment tool
power”, should glow green, not red.
7. Press the button on the deployment tool. The left side lamp on
the tool, marked “air bag connector voltage”, will illuminate and
the air bag module will deploy.
CAUTION:

When deploying the front passenger air bag module, do not
stand on the deploying side.

Stand at least 5 m (16 ft) away from the air bag module.
PHIA0033E
PHIA0032E
PHIA0038E
SRS020-A

DISPOSAL OF AIR BAG MODULE AND SEAT BELT PRE-TENSIONER
SRS-45
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SRS

Deployment of Front Side Air Bag Module (Outside of Vehicle)
1. Make 6.5 mm (0.256 in) diameter holes in air bag module
bracket (SST: KV99105300) at the position shown in figure at
left.
2. Firmly secure air bag module bracket (SST: KV99105300) in a
vise.
3. Insert the stud bolts of side air bag module into the two holes in
air bag module bracket (held in vise) and fix them with two M6
nuts.
CAUTION:
Side air bag module should be secured to air bag module
bracket (SST: KV99105300) in a vise with stud bolt side set-
ting bottom.
4. Connect deployment tool adapter (SST: KV99109000) to
deployment tool (SST: KV99106400) connector and connector
on air bag module.
5. Connect red clip of deployment tool to battery positive terminal
and black clip to negative terminal.
6. The lamp on the right side of the tool, marked “deployment tool
power”, should glow green, not red.
7. Press the button on the deployment tool. The left side lamp on
the tool, marked “air bag connector voltage”, will illuminate and
the air bag module will deploy.
CAUTION:
When deploying the front side air bag module, stand at
least 5 m (16 ft) away from the air bag module.
SRS490-C
SRS628-B
SRS629
SRS020-A