Oscilloscope Patterns and Waveforms

Using Oscilloscope
1. Primary signal of ignition coil
(1) Run the engine at an idle speed.
(2) Connect the probe to oscilloscope pick-up point 1 as shown in the circuit diagram and check the primary signal of the ignition coil.
2. Control signal of ignition power transistor Connect the probe to oscilloscope pick-up point 2 as shown in the circuit diagram and check the control signal of the ignition power transistor.