While discussing electronic ignition systems, Technician A says an NPN transistor in the PCM or ignition module controls primary current flow through the coil. Technician B says coil saturation is controlled by the length of time the primary ignition current is turned on. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Both statements are correct. Technician A is correct in stating that an NPN transistor in the PCM or ignition module controls primary current flow through the coil, which is a common method for controlling the ignition system in modern vehicles. Technician B is correct in saying that coil saturation, which affects the strength of the spark, is controlled by the length of time the primary ignition current is turned on, as this determines how much energy is stored in the ignition coil before it is released to the spark plug.

While Discussing Electronic Ignition Systems, Technician a Says an NPN