Control Diagram symbols - Description and
Operation procedures
These symbols provide further information on the
type of connectivity, direction of flow or type of data
bus of a system.
E99427
1
2
3
4
Description
Item
Mid-speed Controller Area Network (CAN)
1
High-speed Controller Area Network
(CAN)
2
Local Interconnect Network (LIN)
3
Wires crossing not connected
4
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Steering System Health and Safety Precautions
WARNINGS:
When handling the power steering fluid,
always wear protective goggles and gloves
made of nitril.
EYE CONTACT: Power steering fluid
contains long chain alkyl amine
thiophosphate. Avoid contact with the
eyes. Wash hands thoroughly after
handling. If power steering fluid comes into
contact with the eyes, flush the eyes with
plenty of cold running water for 15
minutes. Seek medical attention for any
persistent eye irritation or abnormality.
SKIN CONTACT: If power steering fluid
comes into contact with the skin, remove
contaminated clothing. Wash affected
areas of skin with soap and water. Seek
medical attention for any persistent skin
irritation or abnormality.
INHALED: If oil mist is inhaled, move a
victim to fresh air. Keep a victim warm and
at rest. Seek immediate medical attention
in cases of throat irritation or coughing.
SWALLOWED: Power steering fluid
contains long chain alkyl amine
thiophosphate. If swallowed, drink plenty
of water. Seek immediate medical attention.
CAUTION: If the power steering fluid is
spilled on the paintwork, the affected area
must be immediately washed down with
cold water.
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Exhaust Fumes
These contain asphyxiating, harmful and toxic
chemicals and particles such as carbon oxides,
nitrogen oxides, aldehydes, lead and aromatic
hydrocarbons. Engines should be run only under
conditions of adequate exhaust extraction or
general ventilation and not in confined spaces.
Gasoline (petrol) engine
There may not be adequate warning of odor or of
irritation before toxic or harmful effects arise. These
may be immediate or delayed.
Diesel engine
Soot, discomfort and irritation usually give
adequate warning of hazardous fume
concentrations.
Fibre Insulation
See alsoDusts.
Used in noise and sound insulation.
The fibrous nature of surfaces and cut edges can
cause skin irritation. This is usually a physical and
not a chemical effect.
Precautions should be taken to avoid excessive
skin contact through careful organization of work
practices and the use of gloves.
Fire
See also Welding,Foams,Legal Aspects.
Many of the materials found on or associated with
the repair of vehicles are highly flammable. Some
give off toxic or harmful fumes if burnt.
Observe strict fire safety when storing and handling
flammable materials or solvents, particularly near
electrical equipment or welding processes.
Make sure, before using electrical or welding
equipment, that there is no fire hazard present.
Have a suitable fire extinguisher available when
using welding or heating equipment.
First Aid
Apart from meeting any legal requirements it is
desirable for someone in the workshop to be
trained in First Aid procedures.
Splashes in the eye should be flushed carefully
with clean water for at least ten minutes.
Soiled skin should be washed with soap and water.
In case of cold burns, from alternative fuels, place
affected area in cool to cold water.
Individuals affected by inhalation of gases and
fumes should be removed to fresh air immediately.
If effects persist, consult a doctor.
If liquids are swallowed inadvertently, consult a
doctor giving him the information on the container
or label. Do not induce vomiting unless this action
is indicated on the label.
Fluoroelastomer
See Viton.
Foams - Polyurethane
See also Fire.
Used in sound and noise insulation. Cured foams
used in seat and trim cushioning.
Follow manufacturers instructions.
Unreacted components are irritating and may be
harmful to the skin and eyes. Wear gloves and
goggles.
Individuals with chronic respiratory diseases,
asthma, bronchial medical problems, or histories
of allergic diseases should not work in or near
uncured materials.
The components, vapors or spray mists can cause
direct irritation, sensitivity reactions and may be
toxic or harmful.
Vapors and spray mists must not be inhaled. These
materials must be applied with adequate ventilation
and respiratory protection. Do not remove the
respirator immediately after spraying; wait until the
vapors/mists have cleared.
Burning of the uncured components and the cured
foams can generate toxic and harmful fumes.
Smoking, naked flames or the use of electrical
equipment during foaming operations and until
vapors/mists have cleared should not be allowed.
Any heat cutting of cured foams or partially cured
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Health and Safety Precautions
Introduction
Many of the procedures associated with vehicle
maintenance and repair involve physical hazards
or other risks to health. This subsection lists,
alphabetically, some of these hazardous operations
and the materials and equipment associated with
them. Precautions necessary to avoid these
hazards are identified.
The list is not exhaustive and all operations and
procedures, and the handling of materials, should
be carried out with health and safety in mind.
Before using any product the Materials Safety Data
Sheet supplied by the manufacturer or supplier
should be consulted.
Acids and Alkalis
See alsoBattery Acids.
For example caustic soda, sulphuric acid.
Used in batteries and cleaning materials.
Irritant and corrosive to the skin, eyes, nose and
throat. Cause burns. Can destroy ordinary
protective clothing.
Avoid splashes to the skin, eyes and clothing. Wear
suitable protective impervious apron, gloves and
goggles. Do not breath mists.
Make sure access to eye wash bottles, shower and
soap are readily available for splashing accidents.
Display Eye Hazard sign.
Air Bags
See also Fire, Chemical Materials.
Highly flammable, explosive – observe No Smoking
policy.
Used as a safety restraint system mounted in the
steering wheel and passenger side of the
instrument panel.
The inflator contains a high-energetic propellant
which, when ignited, produces a VERY HOT GAS
(2500°C).
The gas generant used in air bags is Sodium Azide.
This material is hermetically sealed in the module
and is completely consumed during deployment.
No attempt should be made to open an air bag inflator as this will lead to the risk of exposure to
Sodium Azide. If a gas generator is ruptured, full
protective clothing should be worn when dealing
with the spillage.
After normal deployment, gloves and safety
goggles must be worn during the handling process.
Deployed air bags should be disposed of in a
plastic bag in accordance with local regulations at
an approved chemical waste site.
For additional information, refer to:
Supplemental
Restraint System (SRS) Health and Safety
Precautions (100-00 General Information,
Description and Operation).
Air Conditioning Refrigerant
See also Chlorofluorocarbon, Chemical Materials
Highly flammable, combustible – observe No
Smoking policy.
Skin contact may result in frostbite.
Instructions given by the manufacturer must be
followed. Avoid naked lights, wear suitable
protective gloves and goggles.
If refrigerant comes into contact with the skin or
eyes, immediately rinse the affected areas with
water. Eyes should also be rinsed with an
appropriate irrigation solution and should not be
rubbed. SEEK MEDICAL ASSISTANCE IF
NECESSARY.
For additional information, refer to: Air Conditioning
(A/C) System Health and Safety Precautions
(100-00 General Information, Description and
Operation).
Adhesives and Sealers
See also Fire, Chemical Materials.
Highly flammable, flammable, combustible –
observe No Smoking policy.
Generally should be stored in No Smoking areas.
Cleanliness and tidiness in use should be
observed, for example disposable paper covering
benches; should be dispensed from applicators
where possible; containers, including secondary
containers, should be labeled appropriately.
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Solvent-based Adhesives/Sealers - See
Solvents
Follow manufacturers instructions.
Water-based Adhesives/Sealers
Those based on polymer emulsions and rubber
latexes may contain small amounts of volatile toxic
and harmful chemicals. Skin and eye contact
should be avoided and adequate ventilation
provided during use.
Hot Melt Adhesives
In the solid state, they are safe. In the molten state
they may cause burns and health hazards may
arise from the inhalation of toxic fumes.
Use appropriate protective clothing and a
thermostatically controlled heater with a thermal
cut-out and adequate extraction.
Resin-based Adhesives/Sealers, for
example Epoxide and Formaldehyde
Resin-based
Mixing should be carried out in well ventilated
areas, as harmful or toxic volatile chemicals may
be released.
Skin contact with uncured resins and hardeners
can result in irritation, dermatitis, and absorption
of toxic or harmful chemicals through the skin.
Splashes can damage the eyes.
Provide adequate ventilation and avoid skin and
eye contact.
Anaerobic, Cyanoacrylate (super-glues)
and other Acrylic Adhesives
Many are irritant, sensitizing or harmful to the skin
and respiratory tract. Some are eye irritants.
Skin and eye contact should be avoided and the
manufacturers instructions followed.
Cyanoacrylate adhesives (super-glues) MUST NOT
contact the skin or eyes. If skin or eye tissue is
bonded, cover with a clean moist pad and SEEK
IMMEDIATE MEDICAL ATTENTION. Do not
attempt to pull tissue apart. Use in well ventilated
areas as vapors can cause irritation to the nose
and eyes.For two-pack systems see Resin-based and
Isocyanate Adhesives/Sealers.
Isocyanate (Polyurethane)
Adhesives/Sealers
See also
Resin-based Adhesives.
Individuals suffering from asthma or respiratory
allergies should not work with or near these
materials as sensitivity reactions can occur.
Over exposure is irritating to the eyes and
respiratory system. Excessive concentrations may
produce effects on the nervous system including
drowsiness. In extreme cases, loss of
consciousness may result. Long term exposure to
vapor concentrations may result in adverse health
effects.
Prolonged contact with the skin may have a
defatting effect which may lead to skin irritation
and in some cases, dermatitis.
Splashes entering the eye will cause discomfort
and possible damage.
Any spraying should preferably be carried out in
exhaust ventilated booths, removing vapors and
spray droplets from the breathing zone.
Wear appropriate gloves, eye and respiratory
protection.
Antifreeze
See also Fire, Solvents.
For example isopropanol, ethylene glycol,
methanol.
Highly flammable, flammable, combustible.
Used in vehicle coolant systems, brake air pressure
systems, screenwash solutions.
For additional information, refer to: Engine Cooling
System Health and Safety Precautions (100-00
General Information, Description and Operation).
Asbestos
See also Warning Symbols on Vehicles at the end
of this subsection.
Breathing asbestos dust may cause lung damage
or, in some cases, cancer.
Used in brake and clutch linings, transmission
brake bands and gaskets.
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foams should be conducted with extraction
ventilation. See also the vehicle Body Repair
Manual.
Freon
SeeAir Conditioning Refrigerant.
Fuels
See also, Fire, Legal Aspects, Chemicalsand
Solvents.
Avoid skin contact with fuel where possible. Should
contact occur, wash the affected skin with soap
and water.
Gasoline (Petrol)
Highly flammable - observe No Smoking policy.
For additional information, refer to: Petrol and
Petrol-Ethanol Fuel Systems Health and Safety
Precautions (100-00 General Information,
Description and Operation).
Gas-oil (Diesel Fuel)
Kerosene (Paraffin)
Used also as heating fuel, solvent and cleaning
agent.
Flammable - observe No Smoking policy.
Irritation of the mouth and throat may result from
swallowing. The main hazard from swallowing
arises if liquid aspiration into the lungs occurs.
Liquid contact dries the skin and can cause
irritation or dermatitis. Splashes in the eye may be
slightly irritating.
In normal circumstances the low volatility does not
give rise to harmful vapors. Exposure to mists and
vapors from kerosene at elevated temperature
should be avoided (mists may arise in dewaxing).
Avoid skin and eye contact and make sure there
is adequate ventilation.
Gas Cylinders
See also Fire. Gases such as oxygen, acetylene, argon and
propane are normally stored in cylinders at
pressures of up to 138 bar (2000 psi) and great
care should be taken in handling these cylinders
to avoid mechanical damage to them or to the valve
gear attached. The contents of each cylinder
should be clearly identified by appropriate
markings.
Cylinders should be stored in well-ventilated
enclosures, and protected from ice and snow, or
direct sunlight. Fuel gases, for example acetylene
and propane, should not be stored in close
proximity to oxygen cylinders.
Care should be exercised to prevent leaks from
gas cylinders and lines, and to avoid sources of
ignition.
Only trained personnel should undertake work
involving gas cylinders.
Gases
See
Gas Cylinders.
Gaskets (Fluoroelastomer)
SeeViton.
General Workshop Tools and
Equipment
It is essential that all tools and equipment are
maintained in good condition and that the correct
safety equipment is used where required.
Never use tools or equipment for any purpose other
than that for which they were designed. Never
overload equipment such as hoists, jacks, axle and
chassis stands or lifting slings. Damage caused by
overloading is not always immediately apparent
and may result in a fatal failure the next time that
the equipment is used.
Do not use damaged or defective tools or
equipment, particularly high-speed equipment such
as grinding wheels. A damaged grinding wheel can
disintegrate without warning and cause serious
injury.
Wear suitable eye protection when using grinding,
chiseling or sand blasting equipment.
Wear a suitable breathing mask when using
abrasive blasting equipment, working with
asbestos-based materials or using spraying
equipment.
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The use of drum cleaning units, vacuum cleaning
or damp wiping is preferred.
Asbestos dust waste should be dampened, placed
in a sealed container and marked for safe disposal.
If any cutting or drilling is attempted on materials
containing asbestos the item should be dampened
and only hand tools or low speed power tools used.
Battery Acids
See also Acids and Alkalis.
For additional information, refer to:Battery and
Battery Charging Health and Safety Precautions
(100-00 General Information, Description and
Operation).
Brake and Clutch Linings and Pads
See Asbestos.
Brake Fluids (Polyalkylene Glycols)
See also Fire.
For additional information, refer to: Brake System
Health and Safety Precautions (100-00 General
Information, Description and Operation).
Brazing
See Welding.
Chemical Materials
See also Legal Aspects.
Chemical materials such as solvents, sealers,
adhesives, paints, resin foams, battery acids,
antifreeze, brake fluids, fuels, oils and grease
should always be used with caution and stored and
handled with care. They may be toxic, harmful,
corrosive, irritant or highly flammable and give rise
to hazardous fumes and dusts.
The effects of excessive exposure to chemicals
may be immediate or delayed; briefly experienced
or permanent; cumulative; superficial; life
threatening; or may reduce life expectancy.
Chemical Materials - Do's
– Do carefully read and observe hazard and precaution warnings given on material
containers (labels) and in any accompanying
leaflets, posters or other instructions. Material
health and safety data sheets can be obtained
from manufacturers.
– Do remove chemical materials from the skin and clothing as soon as practicable after soiling.
Change heavily soiled clothing and have it
cleaned.
– Do organize work practices and protective clothing to avoid soiling of the skin and eyes;
breathing vapors, aerosols, dusts or fumes;
inadequate container labeling; fire and explosion
hazards.
– Do wash before job breaks, before eating, smoking, drinking or using toilet facilities when
handling chemical materials.
– Do keep work areas clean, uncluttered and free of spills.
– Do store chemical materials according to national and local regulations.
– Do keep chemical materials out of the reach of children.
Chemical Materials - Do Nots
– Do not mix chemical materials except under themanufacturers instructions; some chemicals can
form other toxic or harmful chemicals, give off
toxic or harmful fumes or become explosive
when mixed together.
– Do not spray chemical materials, particularly those based on solvents, in confined spaces,
for example when people are inside a vehicle.
– Do not apply heat or flame to chemical materials except under the manufacturers instructions.
Some are highly flammable and some may
release toxic or harmful fumes.
– Do not leave containers open. Fumes given off can build up to toxic, harmful or explosive
concentrations. Some fumes are heavier than
air and will accumulate in confined areas such
as pits.
– Do not transfer chemical materials to unlabelled containers.
– Do not clean hands or clothing with chemicals. Chemicals, particularly solvents and fuels, will
dry the skin and may cause irritation leading to
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dermatitis or be absorbed through the skin in
toxic or harmful quantities.
– Do not use emptied containers for other materials except when they have been cleaned
under supervised conditions.
– Do not sniff or smell chemical materials. Brief exposure to high concentrations of fumes can
be toxic or harmful.
Chlorofluorocarbons (CFC)
There is concern in the scientific community that
CFCs and Halons are depleting the upper ozone
layer which filters out harmful ultraviolet radiation.
Decreased filtration of ultraviolet radiation may
result in increases in skin cancer, cataracts and
immune system suppression in humans, as well
as decreased productivity of crops and aquatic
systems.
CFCs are used primarily as refrigerants in vehicle
air conditioning systems and as aerosol
propellants. Halons are used as fire extinguishants.
Clutch Fluids
See Brake fluids.
Clutch Linings and Pads
SeeAsbestos.
Corrosion Protection Materials
See also Solvents, Fire.
Highly flammable, flammable – observe No
Smoking policy.
These materials are varied and the manufacturers
instructions must be followed. They may contain
solvents, resins or petroleum products. Skin and
eye contact should be avoided. They should only
be sprayed in conditions of adequate ventilation
and not in confined spaces.
Cutting
See Welding.
Dewaxing
SeeSolvents andFuels (Kerosene).
Dusts
Powder, dusts or clouds may be irritant, harmful
or toxic. Avoid breathing dusts from powdery
chemical materials or those arising from dry
abrasion operations. Wear respiratory protection
if ventilation is inadequate.
Fine dusts of combustible material can present an
explosion hazard. Avoid explosive limits and
sources of ignition.
Electric Shock
Electric shock can result from the use of faulty
electrical equipment or from the misuse of
equipment in good condition.
Make sure that electrical equipment is maintained
in good condition and frequently tested. Faulty
equipment should be labeled and preferably
removed from the workstation.
Make sure that flexes, cables, plugs and sockets
are not frayed, kinked, cut, cracked or otherwise
damaged.
Make sure that electrical equipment and flexes do
not come into contact with water.
Make sure that electrical equipment is protected
by the correct rated fuse.
Never misuse electrical equipment and never use
equipment that is in any way faulty. The results
could be fatal.
Make sure that the cables of mobile electrical
equipment cannot get trapped and damaged, such
as in a vehicle hoist.
Make sure that the designated electrical workers
are trained in basic First Aid.
In cases of electrocution:
– switch off the power supply before approaching
the victim.
– if this is not possible push or drag the victim from the source of electricity using dry
non-conductive material.
– commence resuscitation if trained to do so.
– SUMMON MEDICAL ASSISTANCE.
Engine Oils
See Lubricants and Grease.
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