Fiat 500 1.3 Multijet – AIRBAG – – Side Bag – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - AIRBAG - Fiat 500 1.3 Multijet

AIR BAG - WIRING DIAGRAM Fiat 500 1.3 Multijet

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COMPONENTS - AIRBAG - Fiat 500 1.3 Multijet

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
D070	DRIVER'S SEAT COUPLING	-
D071	PASSENGER SEAT COUPLING	-
E050	INSTRUMENT PANEL
H001	IGNITION SWITCH
I046	DRIVER'S SEAT BELT SWITCH
I047	PASSENGER SEAT BELT SWITCH
K039	FRONT AIR BAG SENSOR
K065	PASSENGER PRESENCE SENSOR
K066	SENSOR FOR DRIVER'S SIDE BAG
K067	SENSOR FOR PASSENGER SIDE BAG
M001	BODY COMPUTER
M060	AIR BAG CONTROL UNIT
Q009	DRIVER'S AIR BAG
Q011	AIR BAG IN DASHBOARD (PASSENGER SIDE)
Q014	DRIVER'S SIDE KNEE BAG
Q020	DRIVER'S SEAT BELT PRETENSIONER
Q021	FRONT PASSENGER SEAT BELT PRETENSIONER
Q030	DRIVER'S SIDE BAG
Q031	PASSENGER SIDE BAG
Q040	DRIVER'S HEAD BAG
Q041	PASSENGER HEAD BAG

COMPONENT LOCATION - AIRBAG - Fiat 500 1.3 Multijet

AIR BAG - COMPONENT LOCATION Fiat 500 1.3 Multijet

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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
D070	DRIVER'S SEAT COUPLING	-
D071	PASSENGER SEAT COUPLING	-
E050	INSTRUMENT PANEL
H001	IGNITION SWITCH
I046	DRIVER'S SEAT BELT SWITCH
I047	PASSENGER SEAT BELT SWITCH
K039	FRONT AIR BAG SENSOR
K065	PASSENGER PRESENCE SENSOR
K066	SENSOR FOR DRIVER'S SIDE BAG
K067	SENSOR FOR PASSENGER SIDE BAG
M001	BODY COMPUTER
M060	AIR BAG CONTROL UNIT
Q009	DRIVER'S AIR BAG
Q011	AIR BAG IN DASHBOARD (PASSENGER SIDE)
Q014	DRIVER'S SIDE KNEE BAG
Q020	DRIVER'S SEAT BELT PRETENSIONER
Q021	FRONT PASSENGER SEAT BELT PRETENSIONER
Q030	DRIVER'S SIDE BAG
Q031	PASSENGER SIDE BAG
Q040	DRIVER'S HEAD BAG
Q041	PASSENGER HEAD BAG

DESCRIPTION - AIRBAG - Fiat 500 1.3 Multijet

The vehicle is equipped with an electronic control system that governs the activation of specific containment devices in the event of frontal or side impact.An electronic control unit manages the entire system.767The Air Bag control unit (NAB) connectors differ depending on the versions available. This is necessary to prevent fitting an incorrect control unit from the Parts Dept. (foolproof logic).In the most complete configuration the frontal protection system includes:driver and passenger front air bags with two-stage activation;single-stage driver''s kneebag;passenger and driver side pretensioners with double retaining action;additional impact detection sensor on front crossmember (ECS).In the most complete configuration the side protection system comprises:Side Bag;Window Bag;side impact detection sensor on central pillars.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 airbag 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 body: in this way the deceleration sensors located inside the unit are near the centre of gravity and detect deceleration accurately for the entire vehicle.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''s side knee bag module is located in the lower part of the dashboard, beneath the steering wheel. This single-stage activation module, in addition to protecting the lower limbs, increases protection for the driver, particularly by preventing him/her from sliding forward, which is a possible cause of injury, particularly to the chest.The Side Bags are incorporated directly into the seats, located in a special housing on the outside of the backrests.The Window Bags are made up of two bags, one on the right side and one on the left side of the vehicle, housed behind the roof side linings and covered by special trims.The passenger and driver side pretensioners with double retaining action are built in to the seat belt reel and the three way seat belt anchorage (pyrotechnic pretensioners) close to the running board area. Their simultaneous activation is designed to take up slack in the seat belt to ensure it holds the occupant against the backrest and cushion 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 vehicle is equipped with a S.B.R. (Seat Belt Reminder) system consisting of a buzzer that notifies the driver and the passenger (if present) that their seat belt is unfastened, complemented by a flashing seat belt unfastened warning light in the instrument panel.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, to activate the Air Bag fault warning light located in the instrument panel.Similarly, it lights up the passenger Air Bag disabled warning light and the seat belts not fastened warning light.This warning light signals that the driver''s and the passenger''s (if present) seat belt is not fastened, coming on constantly from the key on; the warning light in the panel starts to flash and the instrument panel buzzer sounds intermittently if the vehicle speed exceeds 20 km/h or a distance of more than 400 m is travelled when the front seat belts are not correctly fastened.768The latter warning light uses information from the two switches in the front seat belt buckle and a passenger presence sensor under the cushion: this information does NOT affect the Air Bag activating logic.It is possible to deactivate the passenger side Air Bag (front and Side Bag) by using the specific adjustments supplied by the multifunctional display and by pressing the keys on the right of the instrument panel.767The passenger side Air Bag deactivation function is activated from the setup menu on the instrument panel, via the keys on the right of the same panel, 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 on the Air Bag system, the following safety recommendations must be closely followed. For more details,

FUNCTIONAL DESCRIPTION - AIRBAG - Fiat 500 1.3 Multijet

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 early crash front sensor K039 detects slight impacts and signals them to the control unit M060 (pin 12 of connector A); pin 11 of connector A of M060 provides a reference earth to the sensor.When, according to the control logic and to the information supplied from the sensor and the sensors incorporated into the actual control unit, a slight frontal impact is detected, the control unit M060 sends control signals for the intervention of the front modules in the first activation stage, in particular:to the driver side Air Bag Q009, via the clock spring on flywheel D047 (pin 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 passenger side knee Air Bag Q014, from pins 23 (positive) and 24 (earth) of connector A;to the front pretensioners on the reels (central pillars) - driver 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 driver side Q020B front pretensioners on seat belt anchorages (3 way), from pins 20 (earth) and 21 (positive) of connector B, and passenger side Q021B, from pins 18 (positive) and 19 (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 activation stage, in particular:to the driver side Air Bag Q009, via the clock spring on flywheel D047 (pin 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 sensor for the driver''s Side Bag K066 is connected to pin 25 (signal) and 24 (reference earth) of connector B of the Air Bag control unit M060, whilst the sensor for the passenger Side Bag K067 is connected to pin 22 (signal) and 23 (reference earth) of the same connector.When, on the basis of the control logic and of the information supplied by the sensors, a side impact of a certain severity is detected, the control unit M060 sends control signals for the intervention of the side modules, in particular:to the driver side front Side bag Q030A, from pins 11 (earth) and 12 (positive) of connector B;to the passenger side front Side bag Q031A, from pins 9 (positive) and 10 (earth) of connector B;to the driver side Head Bag Q040, from pins 3 (earth) and 4 (positive) of connector B;to the passenger side Head Bag Q041, from pins 1 (positive) and 2 (earth) of connector B.The seat structures that house the driver side Q040B and passenger side Q041B Side Bags are connected to earth C050B.The driver side I046 and passenger side I047 seat belt switches receive a reference earth from the control unit M060 (pin 27 of connector B) and send the respective signal to pins 28 and 26 of connector B of the same control unit.The passenger presence sensor K065, located on the seat, receives a reference earth from pin 30 of connector B of M060 and sends the related signal to pin 29 of the same connector.The control unit M060 (pin 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, to activate the Air Bag fault warning light located in the device E050.If the seat belts are unfastened, the instrument panel E050 will indicate this dangerous situation, via the seat belt unfastened warning light and via an acoustic warning (buzzer).Pressing the keys located to the right of the instrument panel, via the Set-up menu on the instrument panel display, deactivates the passenger side Air bags (front and Side Bag), determining whether the warning light is turned on.