Infiniti FX35, FX50 (S51). Manual

WCS-116

< SYMPTOM DIAGNOSIS >

THE SEAT BELT WARNING CONTINUES SOUNDING, OR DOES NOT SOUND

THE SEAT BELT WARNING CONTINUES SOUNDING, OR DOES NOT
SOUND

Description

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• Seat belt warning does not sound even though driver seat belt is not fastened.
• Seat belt warning sounds even though driver seat belt is fastened.

Diagnosis Procedure

INFOID:0000000005524747

CHECK SEAT BELT WARNING LAMP

Turn ignition switch ON.

Check the operation of the seat belt warning lamp in the combination meter.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 4.

CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL

Check the buckle switch input signal with the “Data Monitor”. Refer to

WCS-24,

"Component Function Check"

Is the inspection result normal?

YES

>> Replace the unified meter and A/C amp.

>> GO TO 3.

CHECK SEAT BELT BUCKLE SWITCH CIRCUIT

Perform the check for the seat belt buckle switch circuit. Refer to

WCS-24, "Diagnosis Procedure"

Is the inspection result normal?

YES

>> Replace the unified meter and A/C amp.

>> Repair harness or connector.

CHECK SEAT BELT BUCKLE SWITCH UNIT

Perform a unit check for the seat belt buckle switch. Refer to

WCS-25, "Component Inspection"

Is the inspection result normal?

YES

>> Replace the combination meter.

>> Replace the seat belt buckle. Refer to

SB-8, "SEAT BELT BUCKLE : Removal and Installation"

Seat belt fastened

: OFF

Seat belt not fastened

: ON

WCS

PRECAUTIONS

WCS-117

< PRECAUTION >

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

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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 AIR BAG” and “SEAT BELT” 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 performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.

• 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 har-
ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.