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Chapter 3 Automotive Test
131
3.6.2 Crankshaft + Primary ignition
Measure the crankshaft and primary ignition at the same time, you can check whether the ignition advance angle is
normal, and look for the cause of misfire at high engine speed. Check whether the crankshaft signal is normal or
whether the primary ignition voltage and closing time are reached.
Use a P130A probe, one end is connected to channel 1 of the oscilloscope, and the other end is grounded with a
black clip. Use a needle to pierce the signal line at the end of the injector plug, and hook the probe to the metal
needle of the needle;
Use a P130A probe, connect one end to channel 2 of the oscilloscope, and the black clip on the other end to ground.
Use a needle to pierce the ground wire of the primary coil, and hook the probe to the metal needle of the needle;
Use ATO oscilloscope to perform combined test on crankshaft + primary ignition, the specific operation is shown in
Figure 3-51:
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