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4
contact with high temperature components such as the water tank
and the exhaust pipe. At the same time, be careful of the voltage
generated by the components such as the ignition coil, the
distributor cover, the ignition circuit and the ignition plug during
engine operation.
1.4.2 Notes on the use of the instrument
(1) This instrument is a precision electronic instrument. Do not
drop it. Handle it as gently as possible, away from heat and
electromagnetic fields.
(2) Ensure that the instrument and diagnostics are well connected
so that signal interruptions do not affect the test.
(3) Use screws as much as possible when using the cables and
connectors to avoid disconnecting and damaging the connectors
when moving. Hold the front end of the connector when pulling the
connector, and avoid pulling the rear cable to avoid damage to the
diagnostic interface.
(4) When the electrical components are energized, the circuit
cannot be disconnected to prevent self-inductance, mutual
inductance and current sensors and the vehicle ECU.
(5) The operation of this instrument requires a certain basis for
vehicle inspection and maintenance, and has a certain
understanding of the electronic control system of the vehicle under
test.
1.4.3 Operating car ECU considerations
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