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X-431 Diagun III English User’s Manual
Precautions on Operating Vehicle’s ECU
z
Do not disconnect the vehicle inner consumer when the ignition switch
is on. High voltage transients may encounters at the moment of
disconnecting, and thus may damage sensors and ECU.
z
Protect the computer from magnetic object (such as wireless speaker)
z
Do cut off the power supply of ECU system before welding on the
vehicle.
z
Pay more attention to ECU and sensors when operation is next to
them.
z
Ground yourself when you disassemble PROM, otherwise ECU and
sensors will be damaged by static.
z
Do not use the pointer ohm meter instead of DMM for testing ECU and
sensor without special requirement.
z
Do not test electric devices in relation with ECU with a test lamp unless
otherwise expressly provided.
z
Do wear a metal ground strip that one end around your wrist and the
other to the vehicle body when you get in and out the vehicle.
z
Do connect ECU harness connector firmly, otherwise electro elements,
such as IC inside ECU, will be damaged.
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