What level of tach reference information is required in order for the PCM to properly control a "Waste Spark" ignition system?
A) Level one information indicating that "a pair of cylinders`pistons is approaching TDC"
B) Level two information indicating "which pair of cylinders`pistons is approaching TDC"
C) Level three information indicating "which cylinder of the piston pair approaching TDC is on the compression stroke"
D) None of this information is required in order for the PCM to control a "Waste Spark" system

Question

Quizplus · Accepted Answer

Level two information indicating "which pair of cylinders`pistons is approaching TDC" is required for the PCM to properly control a "Waste Spark" ignition system. This allows the system to know which pair of cylinders to fire, as each spark will ignite the fuel in the cylinder on its compression stroke and will not affect the cylinder on its exhaust stroke.

What Level of Tach Reference Information Is Required in Order