Infiniti F50. Manual — part 804
PRECAUTIONS
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SRS
PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EHS000M8
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. 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
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:
●
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” Service
EHS0008B
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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.
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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 Precaution
EHS0009L
When you read wiring diagrams, refer to the followings:
●
GI-13, "How to Read Wiring Diagrams"
in GI section
●
in PG section
When you perform trouble diagnosis, refer to the followings:
●
GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES"
in GI section
●
GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident"
in GI section
Check for any service bulletins before servicing the vehicle.
SRS-4
PREPARATION
PREPARATION
PFP:00002
Special Service Tools
EHS0008C
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
Application
HT61961000 and HT62152000
combined
(J38219)
*Special torx bit
Use for special bolts [TAMPER
RESISTANT TORX (Size T50)]
a: 3.5 (0.138) dia.
b: 8.5 - 8.6 (0.335 - 0.339) dia.
c: approx. 10 (0.39) sq.
Unit: mm (in)
KV99105300
(J41246)
Air bag module bracket
Anchoring air bag module
KV99106400
(J38381)
Deployment tool
Disposing of air bag module and front seat
belt pre-tensioner
(J38381-70)
Deployment tool adapter for driver
air bag module
Connection between the deployment tool
and driver air bag module
(J38381-65)
Deployment tool adapter for front
passenger air bag
Connection between the deployment tool
and front passenger air bag module
(J38381-80)
Deployment tool adapter for front
seat belt pre-tensioner (Yellow
connector)
Connection between the deployment tool
and front seat belt pre-tensioner
S-NT361
S-NT354
S-NT357
SHIA0172E
SHIA0173E
PHIA0184E
PREPARATION
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SRS
Commercial Service Tool
EHS0008Z
KV99109000
(J44230)
Deployment tool adapters for side
curtain air bag
Connection between the deployment tool
and side curtain air bag module
KV99108300
(J38381-35)
Deployment tool adapters for front
side air bag
Connection between the deployment tool
and front side air bag module
(J-44615)
Air bag lock master key set
Removing and installation air bag lock
Tool number
(Kent-Moore No.)
Tool name
Application
ZZA1190D
ZZA1166D
LRS191
Tool name
Application
Tamper resistant torx socket
Size:T30
S-NT757
SRS-6
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
PFP:28556
SRS Configuration
EHS0009E
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;
WHIA0042E
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
—
—
×
LH side curtain air bag module
—
×
—
RH side curtain air bag module
—
—
×
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