H - Electronic Control Systems

Question 1

A signal that voltage value is on and then off is:

Answer 1

A digital signal.

Question 2

A signal whose voltage value is constantly variable is called an:

Answer 2

Analog signal.

Question 3

Signals from ON/OFF switches are:

Answer 3

Digital signals.

Question 4

Signals from a thermistor sensor are:

Answer 4

Analog signals.

Question 5

Before they can be used by the central processing unit, analog input signals must be processed in the:

Answer 5

ADC.

Question 6

All of the components in an ECM are kept at the same pace by the:

Answer 6

Internal clock.

Question 7

The device that prepares the output data in a form that can be used outside the ECM is called the:

Answer 7

DAC.

Question 8

A combination of eight binary code bits is called:

Answer 8

A binary word.

Question 9

Input data can be stored in the:

Answer 9

RAM.

Question 10

Which type of RAM is connected directly to the battery rather than powered through the ignition switch?

Answer 10

Volatile and keep alive.

Question 11

The brain of the ECM is called a:

Answer 11

Microprocessor.

Question 12

Which part of the ECM receives information from the system’s inputs?

Answer 12

Microprocessor.

Question 13

What kind of memory is used for permanent storage of data?

Answer 13

PROM and ROM.

Question 14

Random access memory is:

Answer 14

Volatile and non-volatile.

Question 15

Which type of memory can you take out of the ECM to write new program information to it?

Answer 15

PROM.

Question 16

Which type of voltage sensor uses a predetermined voltage signal that is sent from the ECM?

Answer 16

Reference voltage sensor.

Question 17

Which type of voltage sensor produces its own voltage signal?

Answer 17

Voltage-generating sensor.

Question 18

The output actuators of electronically controlled systems are:

Answer 18

Electric motors, solenoids, and relays.

Question 19

On-board fault codes can be read directly from the ECM through:

Answer 19

Blinking lights.

Question 20

Off-board diagnostics are accessed through the use of:

Answer 20

Scanning tools, data link connectors, and scanning tool programs.

Question 21

When measuring sensitive electronic circuits, you can prevent meter loading from damaging circuits damage, causing inaccurate readings and producing high current flow through sensitive electronic components by using:

Answer 21

High impedance digital meters.