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SRS

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H RESTRAINTS

B
SECTION
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) C

E
CONTENTS
PRECAUTIONS ......................................................... 3
. DIAGNOSTIC PROCEDURE 4 (CONTINUED F
Precautions for Supplemental Restraint System FROM DIAGNOSTIC PROCEDURE 2) ............. 30 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- DIAGNOSTIC PROCEDURE 5 .......................... 30 .
SIONER" ................................................................. 3
. Trouble Diagnosis Without CONSULT-II ................ 36 . G
Precautions for SRS "AIR BAG" and "SEAT BELT DIAGNOSTIC PROCEDURE 6 .......................... 36 .
PRE-TENSIONER" Service .................................... 3 . WARNING LAMP FLASH CODE CHART .......... 37 .
Occupant Classification System Precaution ........... 3 . Trouble Diagnosis: "AIR BAG" Warning Lamp Does
SRS
Trouble Diagnosis Precaution ................................. 3 . Not Turn Off ........................................................... 42
.
PREPARATION .......................................................... 4
. DIAGNOSTIC PROCEDURE 6 .......................... 42 .
Special Service Tools .............................................. 4
. Trouble Diagnosis: "AIR BAG" Warning Lamp Does
Commercial Service Tools ....................................... 4 . Not Turn On ........................................................... 43
. I
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ...... 5 . DIAGNOSTIC PROCEDURE 7 .......................... 43 .
SRS Configuration .................................................. 5
. DRIVER AIR BAG MODULE ................................... 44 .
Front Seat Belt Pre-tensioner with Load Limiter ..... 6 Removal and Installation ....................................... 44 . J
Front Side Air Bag ................................................... 6
. REMOVAL .......................................................... 44
.
Side Curtain Air Bag ................................................ 6
. INSTALLATION .................................................. 45 .
Occupant Classification System (OCS) .................. 6 . SPIRAL CABLE ....................................................... 46.
K
Direct-connect SRS Component Connectors .......... 7 . Removal and Installation ....................................... 46 .
TROUBLE DIAGNOSIS ............................................. 8 . REMOVAL .......................................................... 46
.
Trouble Diagnosis Introduction ................................ 8 . INSTALLATION .................................................. 48 .
DIAGNOSIS FUNCTION ...................................... 8 . FRONT PASSENGER AIR BAG MODULE ............. 49 . L
HOW TO PERFORM TROUBLE DIAGNOSES Removal and Installation ....................................... 49 .
FOR QUICK AND ACCURATE REPAIR .............. 8 . REMOVAL .......................................................... 49
.
WORK FLOW ....................................................... 9
. INSTALLATION .................................................. 50 . M
SRS Components Parts Location .......................... 10 . WIRING HARNESS MODIFICATION ................. 50 .
Schematic ..............................................................11
. SIDE CURTAIN AIR BAG MODULE ....................... 52 .
Wiring Diagram-SRS- ............................................ 12 . Removal and Installation ....................................... 52 .
CONSULT-II Function (AIR BAG) .......................... 18 . REMOVAL .......................................................... 52
.
HOW TO CHANGE SELF-DIAGNOSIS MODE INSTALLATION .................................................. 52 .
WITH CONSULT-II ............................................. 18 . CRASH ZONE SENSOR .......................................... 54 .
HOW TO ERASE SELF-DIAGNOSIS RESULTS 19 ... Removal and Installation ....................................... 54 .
Self-Diagnosis Function (Without CONSULT-II) .... 19 . REMOVAL .......................................................... 54
.
HOW TO CHANGE SELF-DIAGNOSIS MODE... 19 INSTALLATION .................................................. 54 .
HOW TO ERASE SELF-DIAGNOSIS RESULTS 20 ... SIDE AIR BAG (SATELLITE) SENSOR .................. 55 .
SRS Operation Check ........................................... 20 . Removal and Installation ....................................... 55 .
DIAGNOSTIC PROCEDURE 1 .......................... 20 . REMOVAL .......................................................... 55
.
Trouble Diagnosis With CONSULT-II .................... 22 . INSTALLATION .................................................. 55 .
DIAGNOSTIC PROCEDURE 2 .......................... 22 . FRONT SEAT BELT PRE-TENSIONER .................. 56 .
DIAGNOSTIC PROCEDURE 3 .......................... 27 . Removal and Installation ....................................... 56 .

Revision: January 2005 SRS-1 2004 Quest
DIAGNOSIS SENSOR UNIT .................................... 57 . For Frontal Collision ...............................................59
.
Removal and Installation ....................................... 57 . SRS INSPECTION (FOR FRONTAL COLLI-
REMOVAL .......................................................... 57
. SION) ..................................................................59
.
INSTALLATION ................................................... 57. For Side Collision ...................................................60
.
ECU DISCRIMINATED NO. ................................ 57 . WHEN SRS IS ACTIVATED IN THE SIDE COL-
OCCUPANT CLASSIFICATION SYSTEM CON- LISION ................................................................60
.
TROL UNIT ............................................................... 58
. WHEN SRS IS NOT ACTIVATED IN THE SIDE
REMOVAL AND INSTALLATION ........................... 58 . COLLISION .........................................................60.
COLLISION DIAGNOSIS ......................................... 59 . SRS INSPECTION (FOR SIDE COLLISION) .....60 .

Revision: January 2005 SRS-2 2004 Quest
PRECAUTIONS

PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EHS000PM

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front C
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: D
q 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. E
q 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. F
q 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.
G
Precautions for SRS "AIR BAG" and "SEAT BELT PRE-TENSIONER" Service
EHS000OG

q Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual. SRS
q 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 I
pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.
q The air bag diagnosis sensor unit must always be installed with the arrow mark "" pointing toward the
front of the vehicle for proper operation. Also check air bag diagnosis sensor unit for cracks, deformities or J
rust before installation and replace as required.
q 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. K
q Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad
side facing upward and seat mounted front side air bag module standing with the stud bolt side facing
down. L
q Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
q After air bag inflates, the front instrument panel assembly should be replaced if damaged.
M
Occupant Classification System Precaution EHS000PW

Replace OCS control unit and passenger front seat cushion as an assembly.
Trouble Diagnosis Precaution EHS000OH

When you read wiring diagrams, refer to the following:
q GI-12, "How to Read Wiring Diagrams" in GI section
q PG-4, "POWER SUPPLY ROUTING CIRCUIT" in PG section
When you perform trouble diagnosis, refer to the following:
q GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section
q GI-25, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section
Check for any service bulletins before servicing the vehicle.

Revision: January 2005 SRS-3 2004 Quest
PREPARATION

PREPARATION PFP:00002

Special Service Tools EHS000OI

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description
(Kent-Moore No.)
Tool name
-- Removing and installing air bag lock
(J-42057A)
Air bag lock master key set
Part of kit (J-42057)

LRS210

Commercial Service Tools EHS000QY

(Kent-Moore No.)
Description
Tool name
(J-1859A) Removing steering wheel
Steering wheel puller

LHIA0043E

(J-42578) Removing steering wheel
Steering wheel puller legs

LHIA0044E

Revision: January 2005 SRS-4 2004 Quest
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) PFP:28556
A
SRS Configuration EHS000OK

SRS

WHIA0257E

J
The air bag deploys if the air bag diagnosis sensor unit is activated 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-
K
tems. For example, the driver air bag module, front passenger air bag module and front seat belt pre-tension-
ers are activated in a frontal collision but not in a side collision.
SRS configurations for some collision modes are as follows:
L
SRS configuration Frontal collision Left side collision Right side collision
Driver air bag module

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