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Chapter 3 Automotive Test
117
3.4.3 Primary + Secondary
When measuring the primary and secondary waveforms at the same time, please use the P130A probe, one end is
connected to channel 1 of the oscilloscope, the black clip on the other end is grounded, pierce the needle into the
ground wire of the primary coil, and the probe is hooked to the metal needle; use a suitable secondary ignition
probe to connect one end to channel 2 of the oscilloscope, and test the other end according to different engine
ignition types.
Use ATO oscilloscope to simultaneously test the three indicators of the secondary ignition coil【Synchronize
voltage test of the primary and the secondary coil, Primary coil voltage and current, and the voltage of the
secondary coil ( use the secondary ignition probe)】, the specific operation is shown in the Figure 3-43:
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