High Voltages In Hybrid Vehicles And Electric Vehicles As Well As Their High-Voltage Components; Danger Of Fire, Danger Of Explosion; Danger Of Burning; Danger Of Tripping - Bosch MMD 302 Original Instructions Manual

2.1.2 High voltages in hybrid vehicles and electric ve-
hicles as well as their high-voltage components
If high-voltage components or high-voltage
wires are inexpertly handled, there is a risk of
fatal injury from high voltages and the possi-
ble transmission of current through the body.
¶
Deenergization is only to be performed by
a qualified electrician, a qualified electri-
cian for specific tasks (hybrid) or a power
systems engineer.
¶
Work on vehicles with high-voltage com-
ponents is only ever to be performed in
a safe, deenergized condition by persons
with the minimum qualification "Trained to
perform electrical work".
¶
Even after deactivating the high-voltage
vehicle electrical system, the high-voltage
battery may still be live.
¶
Operating condition cannot be established
from any running noise, as the electric ma-
chine is silent when stationary.
¶
In gear positions "P" and "N" the engine
or electric motor may start spontaneously
depending on the charge of the high-voltage
battery.
Safety measures:
¶
Never open or damage high-voltage batteries.
¶
On accident vehicles, never touch high-voltage com-
ponents or exposed high-voltage wires before deac-
tivating the high-voltage vehicle electrical system.
¶
Avoid contact with any high-voltage components
and high-voltage wires (orange sheathing) when in
operation.
¶
Secure against unauthorized renewed start-up
(e.g. by means of a padlock).
¶
Always wait at least 10 seconds after deactivating
the high-voltage system.
¶
Visually inspect the high-voltage components and
high-voltage wires for damage. The power systems
engineer responsible should always be immediately
notified of any irregularities, doubts or defects
found.
$
High-voltage components must never exhibit signs
of external damage.
$
The insulation of the high-voltage wiring must be
intact and undamaged.
$
Watch out for any abnormal deformation of the
high-voltage wiring.
Robert Bosch GmbH
Symbols used | MMD 302 | 17
2.2

Danger of fire, Danger of explosion

There is a risk of fire and explosion from fu-
els and fuel vapors when work is performed
on the fuel system or on the mixture control
system.
Safety measures:
¶
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.
2.3

Danger of burning

When working on a hot engine, there is a risk
of injury from burning if such components as
the exhaust gas manifold, the turbo-charger,
the Lambda sensor, etc. are touched or if
parts of the body come too close to them.
These components may be heated to tem-
peratures of several hundred degrees Celsius.
Depending on the duration of the exhaust
gas measurements, the sampling probe of the
exhaust gas measuring instrument may also
become extremely hot.
Safety measures::
¶
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.
2.4

Danger of tripping

When conducting tests or making adjust-
ments, the sensor and connection cables in-
crease the risk of tripping.
Safety measures:
¶
Route the connecting cables such that any risk of
tripping up is prevented.
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1 689 979 642 2014-11-03