Idutex PU630, User Manual, Page: 7 / 33

Shenzhen IDUTEX Tech Co., Ltd
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(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
When performing diagnostic operations on a vehicle equipped with a
computer control system, the following should be noted:
(1) Do not place magnetic objects such as radio speakers close to the
computer, as the magnetic properties of the speakers can damage the
circuits and components in the ECU.
(2) When the ignition switch is turned on, the internal electrical equipment
of the car must not be disconnected. Due to the self-inductance of the coil
when disconnected, a high instantaneous voltage will be generated, which
will cause damage to the sensor and ECU;
(3) When performing repairs near a computer or sensor, special care
should be taken to avoid damage to the ECU and sensor;
(4) When carrying out maintenance work on or near the ECU-controlled
digital meter, be sure to wear a metal strap with one end clamped to the
body and the other end wrapped around the wrist;
(5) When performing welding work on a car, the ECU system power
should be turned off beforehand;
(6) Do not use test lights to test ECU-related electrical devices to prevent
damage to the ECU or sensor unless specifically stated;