1 689 989 380 | 2018-08-01
Robert Bosch GmbH
1.6.2 Danger of acid burning
WARNING
When exhaust gas measurements are taken,
the sampling hoses which are used release a
highly caustic gas (hydrogen fluoride) that
can cause acid burning in the respiratory sys-
tem when heated to temperatures in excess
of 250 °C (482 °F) or in the event of fire.
Consult a doctor immediately after inhaling!
Always wear gloves made of neoprene or PVC
when removing residues left after a fire.
Neutralize any residues left after a fire with a
calcium hydroxide solution. This produces
non-toxic calcium fluoride, which can be
washed away.
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1.6.3 Danger of injury, Danger of crushing
WARNING
The vehicle has rotating and moving parts that
can injure fingers and arms.
Deactivate the start/stop system when working
on a vehicle in order to prevent uncontrolled
engine start.
Operating staff must wear work clothes without
loose bands and loops.
Do not reach in any area with rotating or mov-
ing parts.
WARNING
If the vehicle is not prevented from rolling
away, there is a danger of people being crushed
against a workbench, for example.
Secure vehicle against rolling away.
WARNING
There is the risk with electrically operated fans
in particular that the fan can start running un-
expectedly even when the engine and ignition
are off.
Deactivate the start/stop system when working
on a vehicle in order to prevent uncontrolled
engine start.
Operating staff must wear work clothes without
loose bands and loops.
Do not reach in any area with rotating or mov-
ing parts.
When working on or in the vicinity of electrical-
ly riven fans, allow the engine to cool down
first, thendisconnect the plug of the fan motor.
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1.6.4 Danger of burning
WARNING
When working on a hot engine, there is a risk
of injury from burning if such components as
the exhaust gas manifold, the turbocharger, the
Lambda sensor, etc. are touched or if parts of
the body come too close to them. These com-
ponents may be heated to temperatures of sev-
eral hundred degrees Celsius. Depending on
the duration of the exhaust gas measurements,
the sampling probe of the exhaust gas measur-
ing instrument may also become extremely hot.
Always wear protective clothing, e.g. gloves.
Allow the engine to cool down first. This also
applies to auxiliary heating systems.
Keep connecting cables well away from all hot
parts.
Do not leave the engine running any longer than
necessary for the test or setting.
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1.6.5 Danger of fire, Danger of explosion
WARNING
There is a risk of fire and explosion from fuels
and fuel vapors when work is performed on the
fuel system or on the mixture control system.
Switch off the ignition.
Allow the engine to cool down first.
Avoid naked flames and potential sources of
sparks.
Do not smoke.
Collect any leaked fuel.
Always ensure effective ventilation and suction
when working in closed areas.
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1.6.6 Danger of asphyxiation
WARNING
Car exhaust fumes contain carbon monoxide
(CO) - a colorless, odorless gas. If inhaled, car-
bon monoxide causes an oxygen deficiency in
the body. Extreme caution is therefore essen-
tial when working in a pit, as some of the com-
ponents of the exhaust gas are heavier than air
and settle at the bottom of the pit. Caution is
also necessary when working on LPG-driven ve-
hicles.
Always ensure effective ventilation and suction
(especially when working in a pit).
Always switch on and connect the suction plant
in a closed area.
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User instructions | ET250 | 5 | en
