Technician A says that in bypass mode, the ignition system is timed by the ignition module. Technician B says that in bypass mode, the ignition system does not use the PCM to time spark plug firing. Which technician is correct?

Question

Quizplus · Accepted Answer

In bypass mode, the ignition system's timing is indeed controlled by the ignition module, not the PCM (Powertrain Control Module), meaning both Technician A and Technician B are correct. Technician A is correct in stating that the ignition module times the ignition system in bypass mode, and Technician B is correct in stating that the PCM is not used for timing spark plug firing in this mode.

Technician a Says That in Bypass Mode, the Ignition System