NISSAN ALMERA N16 2003 Electronic Repair Manual

Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”
NJEL0001The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL N16 is as follows (The compo-
sition varies according to the destination and optional equipment.):
For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), front seat
belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), side air bag (satellite) sensor, diagnosis sensor unit (one of components of air bags for a frontal
collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in theRS sectionof 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 should be per-
formed by an authorized NISSAN 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 removalofSpiralCableandAir
Bag Module, see the RS 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-
tor.
Precautions for Trouble DiagnosisNJEL0635CAN SYSTEMNJEL0635S01Do not apply voltage of 7.0V or higher to the measurement
terminals.
Use the tester with its open terminal voltage being 7.0V or less.
PKIA0306E
Precautions for Harness RepairNJEL0636CAN SYSTEMNJEL0636S01Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in)]
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PRECAUTIONS
Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”
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PKIA0307E
Do not perform bypass wire connections for the repair parts.
(The spliced wire will become separated and the characteris-
tics of twisted line will be lost.)
Wiring Diagrams and Trouble DiagnosisNJEL0002When you read wiring diagrams, refer to the following:
Refer to GI-12, “HOW TO READ WIRING DIAGRAMS”
Refer to EL-12, “POWER SUPPLY ROUTING” for power distribution circuit
When you perform trouble diagnosis, refer to the following:
Refer to GI-33, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES”
Refer to GI-22, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”
Check for any Service bulletins before servicing the vehicle.
PRECAUTIONS
Precautions for Harness Repair (Cont’d)
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DescriptionNJEL0003HARNESS CONNECTOR (TAB-LOCKING TYPE)NJEL0003S01The tab-locking type connectors help prevent accidental looseness or disconnection.
The tab-locking type connectors are disconnected by pushing or lifting the locking tab(s). Refer to the
illustration below.
Refer to the next page for description of the slide-locking type connector.
CAUTION:
Do not pull the harness or wires when disconnecting the connector.
[Example]
SEL769DA
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HARNESS CONNECTOR
Description
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HARNESS CONNECTOR (SLIDE-LOCKING TYPE)=NJEL0003S02A new style slide-locking type connector is used on certain systems and components, especially those
related to OBD.
The slide-locking type connectors help prevent incomplete locking and accidental looseness or disconnec-
tion.
The slide-locking type connectors are disconnected by pushing or pullingthe slider. Refer to the illustra-
tion below.
CAUTION:
Do not pull the harness or wires when disconnecting the connector.
Be careful not to damage the connector support bracket when disconnectingthe connector.
[Example]
SEL769V
HARNESS CONNECTOR
Description (Cont’d)
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DescriptionNJEL0004NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYSNJEL0004S01Relays can mainly be divided into three types: normal open, normal closed and mixed type relays.
SEL881H
TYPE OF STANDARDIZED RELAYSNJEL0004S02
1M 1 Make 2M 2 Make
1T 1 Transfer 1M·1B 1 Make 1 Break
SEL882H
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STANDARDIZED RELAY
Description
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GEL264
STANDARDIZED RELAY
Description (Cont’d)
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NOTE:
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POWER SUPPLY ROUTING
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SchematicNJEL0418
YEL657D
POWER SUPPLY ROUTING
Schematic
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YEL658D
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POWER SUPPLY ROUTING
Schematic (Cont’d)
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Wiring Diagram — POWER —NJEL0419BATTERY POWER SUPPLY — IGNITION SW. IN ANY POSITIONNJEL0419S01
YEL659D
POWER SUPPLY ROUTING
Wiring Diagram — POWER —
EL-14