Iveco Daily Euro 4. Manual - part 262

132

ELECTRIC/ELECTRONIC SYSTEM

AILY

URO

The system is capable to cover a deceleration angle, according to vehicle longitudinal axis, of ? 30 degrees and intervenes if a
deceleration is reached which matches deceleration present when a front crash occurs at a speed of ~ 24 km/h against a fixed
barrier.

Electronic central unit, if detecting a deceleration exceeding preset calibration curve, triggers off the reaction of a chemical
compound through electrical detonators.
Gas inflates the two cushions and activates the pretensioners which enable safety belts rolling up devices rewinding and locking.

Central unit is capable to detect this deceleration by two sensors, one electromechanical sensor and one electronic sensor, that
are placed inside it.

The cushions, made of a synthetic fibre, are respectively housed at steering wheel centre and at an opening of the instrument
panel in front of passengers.

- At each start-up operation, the central unit puts on the warning lamp and keeps it on for about 4 seconds, making a system

self-diagnosis operation.

- After each system activation, the central unit keeps fault warning lamp always on, on instrument cluster and the whole

system (central unit, belts and relating pretensioners, cushions and wiring harness) shall necessarily be replaced.

- The system does NOT need either any type of maintenance or any checks.

These values are just indicative and depend on various factors, including vehicle weight, etc.

NOTE

ELECTRIC/ELECTRONIC SYSTEM

133

AILY

URO

Preliminary rules

Before starting any body repair work, welding, work requiring
the removal of air bags or of the control unit, it is necessary
to:

- move the ignition key to “STOP” and remove it

- always disconnect the battery, i.e.: disconnect the two

terminals from their post and isolate them taping
appropriately

- wait for at least 10 minutes before proceeding

- disconnect the control unit connector.

Store the modules with the cover upwards in a key-lockable
metal cabinet. The cabinet, to be used for this purpose only,
must not be used for storing other types of material, especially
if inflammable.

All the connectors used and wired on air bag modules contain
a short circuit clip. Up to the moment in which the air bag
modules are connected to an appropriate source of energy,
there is no possibility of undue activation of the units.

A system component not activated during an accident is to
be considered still “active”.

Therefore, undeployed components to be removed from
vehicles (due to faults, guarantee expiry or other causes) must
be returned to the special centre through the procedure
described below.

All the system components have been specifically designed
to work on vehicles of a specific brand and type. Therefore,
air bags cannot be adapted, re-used or installed on other
vehicles than the one for which they have been designed and
manufactured.

The following rules must absolutely be followed
when doing any work concerning vehicles fitted with
safety system with air bag.

Remember that air bag modules are devices to be
handled with care. Their use, transport and storage
are ruled by the following procedures.

The assembly or disassembly of components may
ONLY be carried out by competent and authorised
personnel.
The failure to follow the instructions given below may
involve unwanted activation of the system, personal
injury or unnecessary system repair. IT IS STRICTLY
PROHIBITED

DISASSEMBLE

AIR

BAG

MODULES STRIPPING THEIR COMPONENTS.

NOTE

Any attempt to re-use, adapt or install them on a
different type of vehicle may cause serious or lethal
harm to the occupants of the vehicle in the event of
a crash.

NOTE

134

ELECTRIC/ELECTRONIC SYSTEM

AILY

URO

Accidents with or without deployment of the air bag device
Some system components should be inspected whether the
system has been activated or not. These components are:

- steering column;

- steering column support;

- electronic control unit and modules retaining area;

- clock spring;

- dashboard (in the passenger’s air bag area).

The component must be replaced in the presence of
distortion, breakage and flexure.

Accidents with the deployment of the air bag device
If the vehicle has undergone a head-on crash involving the
total deployment of the system, the following components
must be replaced:

- air bag modules;

- pretensioners;

- electronic control unit;

- clock spring.

The harness and connectors should be inspected for signs of
burns, melting of the outer insulation or damage due to
excessive heat.

Any signs of damage on the clock spring in the control unit
retaining area and on the air bag modules call for the
replacement of the damaged components.

Painting work

No particular rules of safety are to be followed for painting
work followed by oven drying, as the modules and
pretensioners have been designed in such a way that they will
not be damaged heating the outer surfaces of the vehicle
with normal paint drying systems.

It is prohibited to use naked flames near the modules.

All electronic control units (including the air bag system)
should always be removed if their temperature in certain
environments may reach or exceed 85

°C.

Health hazards

The precautions to be taken when handling deployed air
bags are the following:

- use protective polyethylene gloves and safety goggles;

- after touching triggered air bags, wash your hands and

the parts of the body exposed with soap and water.

Effects of over-exposure

There is no potential hazard of exposure to the propellants
as the system is completely sealed.

The propellant mixture is in the solid state, therefore
inhalation is impossible even in the event of breakage of the
gas generator cartridge.

Should any gas come out there is not health hazard.

Avoid any contact with the skin and do not swallow the
propellant.

In the event of:

- contact with the skin wash immediately with soap and

water;

- contact with the eyes: wash immediately with running

water for at least 15 minutes;

- inhalation: take the person outdoors immediately;

- swallowing: induce vomit if the person is conscious.

If any component of the safety system is damaged
following an accident, it should be replaced.
Do not attempt to repair the control unit, clock
spring or air bag modules.

NOTE

Always call a doctor for all the above conditions.

ELECTRIC/ELECTRONIC SYSTEM

135

AILY

URO

Under normal conditions the driver’s and passenger’s air bag
are activated by the electronic triggering device during the
crash. The gas developed (mainly nitrogen) under these
conditions is not harmful.

Personnel carrying out operations on the device fitted on
vehicles must absolutely adhere to the rules of safety given
below.

Personnel operating on these devices must be suitably trained
and follow the precautions given below:

- In open (exploded) air bag removal and replacement

operations handle only one air bag at a time and for
removal use polyethylene gloves and protective goggles.

- Always rest the air bag module with the opening lid and

pre-split groove facing upwards. Do not put anything on
top of this lid.

- Afterwards wash your hands carefully with neutral soap

and in the event of contact with the eyes of residual
powder, rinse immediately with running water.

- Before starting work on the system, disconnect the two

battery cables (firstly the negative one) isolate the
terminals with insulating tape and wait at least 10 minutes
before proceeding.

- The metal components of an air bag that has just been

deployed

are

very

hot.

Avoid

touching

these

components for 20 minutes from the time of air bag
deployment.

- Do not carry out repairs on air bag modules. Send all

faulty modules to the supplier. Do not heat the air bag
module for example by welding, hammering, drilling,
mechanical machining etc.

- Never install on the vehicle air bags that have been

dropped or show signs of any type of damage.

- It is prohibited to keep air bags together with inflammable

material or fuel.

- The gas generators must not come into contact with

acids, greases and heavy metals. Contact with these
substances may cause the formation of poisonous,
harmful gas or explosive compounds.

- Never use naked flames near air bag devices and system

components.

Any spare parts should be stored in their original packing and
temporary storage should follow the same procedure as for
an undeployed air bag removed from the vehicle, i.e. a
key-lockable metal cabinet must be used, especially for this
purpose (metal, shock resistant cabinet with grilles to allow
natural ventilation inside). The cabinet must have special
warning notices (DANGER EXPLOSIVES - NO NAKED
FLAMES - NOT TO BE OPENED BY UNAUTHORISED
PERSONS).

Air bag module scrapping

The air bag modules fitted on the vehicle must not be
scrapped with the vehicle itself, but removed beforehand and
then deployed as described in the following pages.

Air bag units must not be scrapped without firstly deploying
them.

If the air bag module has not been activated during a crash,
the device is to be considered as still charged.

All unexploded material MUST NOT BE ACTIVATED and
should be sent to a specialised centre with the following
wording on the delivery note:

- AIR

BAG

DEVICE

CONTAINING

EXPLOSIVE

CHARGE TO BE DEACTIVATED

The devices must absolutely be shipped in the same package
in which the spares are received and if this is not available it
is possible to ask the SPARES division for the package only.

Clearly in the case of replacing air bag devices the original
packing should be kept intact for sending the undeployed
device.

For FOREIGN MARKETS follow local regulations.

The failure to follow the procedures listed here may
cause undue activation of the air bag units and
personal injury. Undeployed air bag units must NOT
be disposed of through the usual refuse disposal
channels. Undeployed air bag units contain harmful
substances for the health and may cause personal
injury if the sealed container which contains them is
damaged during disposal.

Content .. 260 261 262 263 ..