Oscilloscope Patterns and Waveforms

PRIMARY SIGNAL OF IGNITION COIL
1. Run the engine at an idle speed.

Primary Signal Of Ignition Coil:

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.
CONTROL SIGNAL OF IGNITION POWER TRANSISTOR

Control Signal Of 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.