Exam 14: Ignition System Operation and Diagnosis

On a vehicle with a distributor, what is used to trigger the ignition control module (ICM) or the PCM?

What action will be taken if the knock sensor detects spark knock?

Identify the type of ignition system shown in this diagram.

Typical secondary coil resistance specifications usually range from ________ ohms.

Technician A says to use a normal spark plug when checking for spark. Technician B says that a spark tester should be used to check for spark. Which technician is correct?

A spark tester should be used to check for spark because ________.

Identify the type of ignition system shown in this diagram.

A coil is being tested using current ramping. The waveform should ________.

Technician A says that the primary coil has more windings. Technician B says that the secondary coil has more windings. Which technician is correct?

Technician A says that an engine will likely miss under load if the ignition coil is tracked. Technician B says that one wire of a waste spark coil must be grounded. Which technician is correct?

The device that signals the switching of the coil on and off or just on in most instances is called the ________.

Which of these components sends a pulse signal to an electronic ignition module?

Technician A says that inductive ignition systems supply battery voltage to the positive side of the ignition coil and pulse the negative side of the coil on and off to ground to create a high-voltage spark. Technician B says if an ignition system uses a distributor, it is called a DI system. Which technician is correct?

Technician A says that a thorough visual inspection should be performed on all ignition components when diagnosing an engine performance problem. Technician B says platinum spark plugs can be regapped after use in an engine. Which technician is correct?

A DTC (Diagnostic Trouble Code) P0301 (misfire on cylinder 1) on a waste spark system could be caused by all of these, EXCEPT ________.

Technician A says that a pickup coil can be tested with an ohmmeter. Technician B says that ignition coils can be tested with an ohmmeter. Which technician is correct?

An ignition scope pattern of the ignition secondary shows the firing line at 28 kV. This indicates ________.

Technician A says that a defective spark plug wire can cause an engine miss. Technician B says that a defective spark plug can cause an engine miss. Which technician is correct?

A no-start condition is being described on an engine equipped with a coil-on-plug ignition system. Technician A says that a bad CKP (crankshaft position) sensor could be the cause. Technician B says that an open spark plug wire could be the cause. Which technician is correct?

Spark plugs have a ________ in the center electrode to reduce electromagnetic noise.