MAC TOOLS Mentor Touch ET750 User Manual Download

Page: 7 / 24

1 689 989 285

2020-02-24

Robert Bosch GmbH

3. Safety instructions

3.1

Risk of electric shocks

3.1.1

Low voltages, high voltages

Hazardous voltages occur in both the lighting
system and the electrical system of a motor
vehicle. If contact is made with live parts
(e.g. with the ignition coil), there is a risk of
electric shock from flashover voltages caused
by damaged insulation (e.g. ignition cables
which have been attacked by martens). These
apply to the secondary and primary sides of
the ignition system, the wiring harness with
connectors, lighting system (Litronic) as well
as connection to the vehicle.

Safety measures:

Only connect to a properly grounded outlet.

Only the enclosed or a tested power supply cable is
to be used.

All extension cables must be fitted with shock-proof
contacts.

Do not exceed the voltage limits as specified on the
connection cables.

Any cables with damaged insulation must be
replaced.

Check the electrical equipment every two years and
immediately deal with any problems.

Only use fuses with specified current ratings.

Before connecting it to the vehicle, first connect the
product to the lighting mains and switch on.

Before switching on the ignition connect the (B-)
cable to engine ground or the battery (B–) terminal.

Always switch off the ignition before performing
any work on the electrical system of the vehicle.
Intervention includes, for instance, connection to the
vehicle, replacement of ignition system components,
removal of equipment (e. g. alternators), connection
of equipment to a test bench.

Wherever possible, tests and settings should always
be caried out with the ignition switched off and the
engine stationary.

If tests or settings are carried out with the ignition
switched on or the engine running, care must be
taken not to touch any live parts. This applies
to all connection cables and leads as well as to
connections of equipment to test benches.

Test connections must always be made using
suitable connectors (e.g. Bosch testing cable set or
vehicle-specific adapter cables).

Make sure that all test connections are properly
plugged in and secure.

Before disconnecting the (B-) cable from the engine
ground or battery (B–), switch off the ignition.

Never open the enclosures.

3.1.2

High voltages in hybrid vehicles and electric
vehicles 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
possible transmission of current through the
body.

Deenergization is only to be performed
by a qualified electrician, a qualified
electrician for specific tasks (hybrid) or a
power systems engineer.

Work on vehicles with high-voltage
components 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
machine 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
components or exposed high-voltage wires before
deactivating 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).

After each switch off of the high-voltage system,
observe a waiting time of 5 minutes (depending
on the manufacturer's instructions). Subsequently
ascertain the absence of voltage using a suitable
testing device.

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.

Safety instructions | ET750 | 7