An ignition module, also known as an ignition control module (ICM), is an electronic device that controls the timing and duration of the spark in an internal combustion engine. A properly functioning ignition module is essential for ensuring that the engine starts and runs smoothly.
There are a few different ways to check an ignition module. One method is to use a multimeter to measure the resistance of the module. Another method is to use an oscilloscope to observe the waveform of the spark. If the resistance or waveform is outside of the manufacturer’s specifications, the ignition module may need to be replaced.