Distributorless Ignition System (DIS)

In a DIS electrical circuit, how many ignition coils does a four-cylinder engine typically contain?

• One

• Two

• Three

• Four

In a DIS system, what is the role of the cylinder head between the spark plugs?

• It acts as a conductor and completes the secondary circuit

• It cools the engine

• It injects fuel into the cylinders

• It measures the air-fuel mixture

During which stroke is the spark wasted?

• Induction

• Compression

• Power

• Exhaust

What happens if the dwell period is increased?

• The voltage produced is lower

• The voltage produced is higher

• The ignition coil stops working

• The primary winding is disconnected

Which stroke requires a higher spark voltage to ignite the air and fuel mixture?

• Induction stroke

• Compression stroke

• Power stroke

• Exhaust stroke

What is the role of the primary winding in the DIS primary circuit?

• To produce high secondary voltage

• To regulate the spark plug temperature

• To monitor the ICM output

• To connect the crankshaft sensor

What does the DIS system use to determine when to fire the spark plugs?

• The crankshaft sensor

• The camshaft sensor

• The ignition coil

• The distributor

In a typical GM DIS system, what does the ECU monitor?

What is the role of the ICM in a typical GM DIS system?

What is the function of the coil pack in a typical Ford DIS system?