Launch X-431 V User Manual page 4

LAUNCH
messaging, because it may cause a data communication interruption. If it
happens, it is abnormal and just try to re-do it.
Precautions on Operating Vehicle's ECU
Do not disconnect the vehicle inner consumer when the ignition switch is
on. High voltage transients may encounter at the moment of disconnecting,
which may damage the sensors and the ECU.
Protect the computer from magnetic object.
Do cut off the power supply of ECU system before welding on the vehicle.
Pay more attention to the ECU and the sensors when the operation is next
to them.
Ground yourself when you disassemble PROM, otherwise ECU and
sensors will be damaged by static electricity.
Do connect ECU harness connector firmly, otherwise electronic elements,
such as IC inside ECU, will be damaged.
X-431 V User's Manual — Safety Precautions
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