60
LAUNCH
X-431 PAD V
User's Manual
*Notes:
1. Battery poles inside the vehicle are enveloped by connectors, which
may produce some errors for test results. The tolerance results from the
resistance of connectors. The greater the resistance value is, the greater
the tolerance becomes. But generally, the tolerance does not affect the
test conclusion.
2. Testing the battery separately generates an exact test result. The battery
box is a very useful auxiliary tool for quick test. If any problems were
found, test it separately for getting an exact test result.
7.3 Oscilloscope (Optional)
7.3.1 Introduction
The Scopebox is an optional add-on module of Maximus 3.0, including
automotive oscilloscope and automotive ignition waveform.
Automotive oscilloscope can make the auto repair technician quickly
judge the faults on automotive electronic equipment and wiring, and
the oscilloscope sweep speed is far greater than the signal frequency
of such vehicles, usually 5-10 times of the measured signal. The
automotive oscilloscope not only can quickly acquire the circuit signal,
but also can slowly display the waveform to observe and analyze.
It can also record and store the tested signal waveform which can
be recalled to observe for the fast signal, having great convenience
to failure analysis. Either high-speed signal (e.g.: Injection nozzle,
intermittent fault signal) or the slow-speed signal (e.g. the throttle
position change and the oxygen sensor signal) can be observed
through automotive oscilloscope in an appropriate waveform.
The electronic signal can be compared and judged via measuring
five parameters indexes. The five parameters are the amplitude (the
maximum voltage of signal), the frequency (the cycle time of signal),
the shape (the appearance of signal), the pulse width (the duty cycle
or the time range of signal), and the array (the repetition characteristic
of signal), which can be tested, displayed, saved by the automotive
oscilloscope. Via the waveform analysis can further detect the circuit
fault on sensors, actuators, circuits, and electronic control units, etc.
