80
LAUNCH X-431 PAD V
User's Manual
Fig. 7-48
A lot of clutter will be displayed on the horizontal section of primary
waveform if contact has poor grounding, as shown below gure 7-49.
Fig. 7-49
Fig. 7-50 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 nd out the
faulty component or module.
Fig. 7-50
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 failures, Fig. 7-51 just
shows the major possible factors for the failures.
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