Your first tool for diagnosing an ignition issue is your eyes. Spend some time inspecting the coil’s connector, boot and the spark plug. Often the cause of an ignition system problem will present itself.
A no-spark condition could be the result of communication errors or missing data from a dead module.
There’s more to ignition science than looking for the classic quarter-inch long “hot blue spark” jumping from coil secondary to ground.
It’s more important than ever to understand how the crankshaft and camshaft sensors function in both the ignition control and fuel injection systems.
The secret to being able to capture and analyze secondary ignition waveforms is understanding what is happening in the coil and at the spark plug, and how the scope measures and graphs the voltages and ignition event.