LAUNCH X-431 PAD III User Manual
126
Fig. 13-9
A lot of clutter will be displayed on the horizontal section of primary waveform if
contact has poor grounding, as shown below figure 13-10.
Fig.13-10
Fig. 13-11 shows the fault of low-voltage waveform in electronic ignition system.
The voltage does not rise during magnetizing, which indicates that the effect of
limitation of the circuit failed and no components on distributorless ignition
system can be adjusted. When this waveform is abnormal, you can only replace
the ignition coils, igniter, ignition signal generator and cam position sensor, etc.,
one by one, to find out the faulty component or module.
Fig. 13-11
The secondary waveform is also affected by the spark plug, the combustion
process, mixture gas composition, the engine thermal state of the ignition coil,
etc., which is more complicated. The following lists a large number of measured
secondary faulty waveform for reference. Since various factors lead to the
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