Week #3 - Chapter 4

Question 1

Chrysler’s name for the electronic ignition system (EIS) and the control unit (module) is called the ________.

Answer 1

Electronic Ignition System (ECU)

Question 2

The ________ uses the changing strength of the magnetic field surrounding a coil of wire to signal the module and computer.

Answer 2

Magnetic crankshaft position sensor

Question 3

The ________ requires a small input to generate an output or signal voltage.

Answer 3

Hall-effect switch

Question 4

The device that signals switching of the coil on and off is called the _________.

Answer 4

Trigger

Question 5

For any ignition system to function, the primary current must be turned on to charge the coil and off to allow the coil to discharge, creating a high-voltage spark. This on and off is called ________.

Answer 5

Switching

Question 6

In an ignition coil, there are two windings, a primary and a secondary winding. When a change occurs in the magnetic field of one coil, a change also occurs in the other coil winding. This generation of electric current in both coil windings is called ________.

Answer 6

Mutual induction

Question 7

When current starts to flow into a coil, an opposing current is created in the windings of the coil. This opposing current generation is caused by ________ and is called ________.

Answer 7

Self induction, Inductive reactance

Question 8

The negative terminal of the coil opens and closes the primary ignition circuit by opening or closing the ground return of the circuit. What is this terminal called?

Answer 8

Ignition Module (Ignitor)

Question 9

“E coil” is the name given to the coil used in which car manufacturer’s high energy system

Answer 9

GM (General Motors)

Question 10

In an ignition coil, and surrounding the secondary windings, what is the heavy wire called?

Answer 10

Primary coil windings

Question 11

What is the term specified by the Society of Automotive Engineers (SAE) for an ignition system that uses a distributor?

Answer 11

Distributor Ignition (DI)

Question 12

A ________ uses one coil from two cylinders. Instead of grounding one lead of the secondary winding, both ends are connected to a spark plug. When the coil fires, one spark plug is fired when the piston is on the compression stroke and the other (paired) cylinder is on the exhaust stroke.

Answer 12

Waste-spark ignition

Question 13

A ________ uses a shutter wheel or other device that changes the magnetic field strength from a magnet that is exposed to the Hall-effect chip. The electronics inside the sensor creates a square wave (on and off) output signal.

Answer 13

Hall-effect sensor

Question 14

A ________ uses a permanent magnet wrapped with a coil wire to produce a changing voltage when the magnetic field strength changes as the result of a notched wheel passing near the sensor.

Answer 14

Magnetic sensor

Question 15

Pulsing the primary windings of an ignition coil on and off creates up to ________ volts from the secondary of the coil. This is achieved by the ignition control module or PCM and the triggering (when to fire) is achieved by a pickup coil or crankshaft position sensor.

Answer 15

40,000

Question 16

Technician A says that a defective crankshaft position sensor can cause a no-spark condition. Technician B says that a faulty ignition control module can cause a no-spark condition. Which technician is correct?

Answer 16

Both Technicians A and B

Question 17

Fires two spark plugs at the same time. Fires one spark plug with reverse polarity. Fires one spark plug with straight polarity. What type of ignition system conducts these actions?

Answer 17

Waste-spark-type

Question 18

Two technicians are discussing distributor ignition. Technician A says that the pickup coil or optical sensor in the distributor is used to pulse the ignition module (igniter). Technician B says that some distributor ignition systems have the ignition coil inside the distributor cap. Which technician is correct?

Answer 18

Both Technicians A and B

Question 19

The ________ signals the electronic control unit (module).

Answer 19

Pulse generator

Question 20

The ignition module (ignitor), pickup coil (pulse generator), and ignition switch are components of which circuit?

Answer 20

The primary ignition circuit

Question 21

The ignition module has direct control over the firing of the coil(s) of an EI system. Which component(s) triggers (controls) the module?

a. Pickup coil
 	b. Computer
 	c. Crankshaft sensor
 	d. All of the above

Answer 21

d. All of the above

Question 22

Distributor-less (waste-spark) ignition systems can be triggered by a ________ or a _________.

Answer 22

Hall‑effect sensor, Magnetic sensor

Question 23

HEI, Duraspark, and EIS are examples of what type of ignition system?

Answer 23

Distributor ignition systems

Question 24

Direction of rotation of the coil windings determines ________.

Answer 24

Coil polarity

Question 25

Because of ________, an ignition coil cannot be fully charged (reach magnetic saturation) until after a delay of about 10 ms.

Answer 25

Inductive reactance