Fiat 500 1.4 16v – AIRBAG – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - AIRBAG - Fiat 500 1.4 16v

AIR BAG - WIRING DIAGRAM Fiat 500 1.4 16v

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COMPONENTS - AIRBAG - Fiat 500 1.4 16v

Component code	Description	Reference to the operation
A001	BATTERY
B001	JUNCTION UNIT
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
C050	AIR BAG SYSTEM EARTH	-
D001	FRONT/DASHBOARD COUPLING	-
D047	CLOCK SPRING COUPLING
E050	INSTRUMENT PANEL
H001	IGNITION SWITCH
K039	FRONT AIR BAG SENSOR
M001	BODY COMPUTER
M060	AIR BAG CONTROL UNIT
Q009	DRIVER'S AIR BAG
Q011	AIR BAG IN DASHBOARD (PASSENGER SIDE)
Q020	DRIVER'S SEAT BELT PRETENSIONER
Q021	FRONT PASSENGER SEAT BELT PRETENSIONER

COMPONENT LOCATION - AIRBAG - Fiat 500 1.4 16v

AIR BAG - COMPONENT LOCATION Fiat 500 1.4 16v

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Component code	Description	Reference to the operation
A001	BATTERY
B001	JUNCTION UNIT
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
C050	AIR BAG SYSTEM EARTH	-
D001	FRONT/DASHBOARD COUPLING	-
D047	CLOCK SPRING COUPLING
E050	INSTRUMENT PANEL
H001	IGNITION SWITCH
K039	FRONT AIR BAG SENSOR
M001	BODY COMPUTER
M060	AIR BAG CONTROL UNIT
Q009	DRIVER'S AIR BAG
Q011	AIR BAG IN DASHBOARD (PASSENGER SIDE)
Q020	DRIVER'S SEAT BELT PRETENSIONER
Q021	FRONT PASSENGER SEAT BELT PRETENSIONER

DESCRIPTION - AIRBAG - Fiat 500 1.4 16v

The vehicle is equipped with an electronic control system that governs the acivation of specific containment devices in the event of frontal impact.An electronic control unit manages the entire system.767The Air Bag control unit (NAB) connectors differ depending on the version. This is necessary to prevent fitting an incorrect control unit from the Parts Dept. (foolproof logic).The frontal protection system includes:Driver and passenger front air bags with two-stage activation;driver and passenger pretensioners with dual retaining action;additional impact detection sensor on front crossmember (ECS).The front protection system features new Air Bag Smart 2 activation software that automatically adapts activation parameters according to impact severity.Driver and passenger front airbags feature two-stage activation:when the impact is of moderate severity, the electronic control unit controls the air bag first activation stage and then the second stage after a certain delay to ensure that the energy discharged onto the occupant is not harmful;for very severe crashes, the control unit activates the first and second stage with a very slight delay in order to absorb the occupant''s greater kinetic energy before he strikes the steering wheel or dashboard.A supplementary ECS “Early Crash Sensor” on the front crossmember near the engine cooling radiator also helps the electronic control unit to operate more quickly than a conventional system so that the airbag activation stage is completed before the occupant''s body begins to move towards the steering wheel or dashboard.The control unit is located under the centre console and is securely fastened to the bodyshell: in this way the deceleration sensors located inside the unit are near the centre of gravity and detect the deceleration for the entire vehicle accurately.The Air Bag module is fitted in the centre of the steering wheel. it is fitted on a rocker plate that allows the horn to be operated. The plate houses a metal container that contains the folded bag and the gas generation device that inflates the bag.A clock spring allows the connecting cables for the Air Bag module to follow the rotation of the steering wheel without danger of breaking.The passenger Air Bag is located on the dashboard, and is fastened directly to the vehicle crossmember by means of a special bracket.The driver and passenger pretensioners with dual retaining action are integrated respectively in the seat belt reel and in the third point mounting for the actual seat belts (pyrotechnic pretensioners) near the area of the running board. Their simultaneous activation is designed to take up slack in the seat belt to ensure it holds the occupant against the backrest from the first moments of impact, thus reducing movement inside the passenger compartment.The seat belts are also equipped with a load limiter which makes it possible to adjust the force acting on one''s chest and shoulders during the retaining action of the belts in the case of a frontal impact.The control unit is equipped with a self-diagnostic function:it detects and stores faults;it recognises the various components and the fault type;it indicates the onset of faults by means of the special warning light.The activation of the system following a particularly serious impact is memorized by the control unit.When the system autodiagnostic function detects a fault or an impact is recorded, the control unit sends a signal, via the CAN, for the the activation of the Air Bag fault warning light located in the instrument panel.Similarly, the passenger side air bag disabling warning light is lit up.The front passenger air bag can be deactivated following the specific instructions from the multifunction display using the buttons on the right of the instrument panel.767The function of deactivating the passenger air bag is activated using the dedicated buttons to the right of the instrument panel in the set up menu in the actual panel and not using the key!! When it is deactivated the warning light in the instrument panel comes on.For more details,The system control unit supply line is protected by a specific Body Computer fuse.768When operations are carried out to the Air Bag system, the following safety recommendations must be closely followed. For more details,

FUNCTIONAL DESCRIPTION - AIRBAG - Fiat 500 1.4 16v

The control unit for the Air Bag system M060 receives a supply controlled by the ignition (INT) at pin 2 of connector A from the line protected by fuse F50 of the Body Computer M001 (pin 3 of connector E).Pin 1 connector A of M060 is connected to the specific earth C050A.The front early crash sensor K039 detects slight impacts and signals them to the control unit M060 (pin 12 of connector A); pin 11 of connector A of M60 provides the sensor with a reference earth.When, according to its control logic, the above sensor and the sensors incorporated into the actual control unit detect a slight frontal impact, the control unit M060 sends signals for the intervention of the front modules in the first stage; specifically:to the driver''s air bag Q009, via the clock spring contact on the steering wheel D047 (pins 11 and 12), from pins 15 (positive) and 16 (earth) of connector A;to the passenger side air bag Q011, from pins 13 (earth) and 14 (positive) of connector A;to the front pretensioners on the reels (centre pillars) driver''s side Q020A, from pins 15 (earth) and 16 (positive) of connector B, and passenger side Q021A, from pins 13 (positive) and 14 (earth) of the same connector;to the front pretensioners on the seat belt mounting (3rd point) driver''s side Q020B, from pins 11 (earth) and 12 (positive) of connector B, and passenger side Q021B, from pins 9 (positive) and 10 (earth) of the same connector.If a more serious frontal impact is detected, the control unit M060 sends signals for the intervention of the front modules in the second stage; specifically:to the driver''s air bag Q009, via the clock spring contact on the steering wheel D047 (pins 9 and 10), from pins 19 (positive) and 20 (earth) of connector A;to the passenger side air bag Q011, from pins 17 (earth) and 18 (positive) of connector A.The control unit M060 (pins 7 and 8 of connector A) is connected, via the B-CAN line, to the Body Computer M001 and to the instrument panel E050.When the system autodiagnostic function detects a fault or an impact is recorded, the control unit M060 sends a signal, via the CAN, for the the activation of the Air Bag fault warning light located in the instrument panel E050.It is possible, using the buttons to the right of the instrument panel, to deactivate the front passenger air bag via the dedicated menu in the instrument panel display which causes the warning light to come on.