Chapter 23 PowerPoint

Define these Technical Terms using the textbook:

1. CAN (controller area network)-

2. data bus-

3. integrated circuit (IC)-

4. keep alive memory (KAM)-

5. active sensor-

6. passive sensor-

7. reference voltage-

8. vehicle sensors-

9. waveform-

Answer these discussion questions using the textbook:

1. Sketch a block diagram for a computer system.

Read the chapter summary below:

■ A computer is a complex electronic circuit that will produce programmed electrical outputs after receiving specific electrical input signals.

■ The term cybernetics refers to the study of how electrical-mechanical devices can duplicate the action of the human body.

■ The binary numbering system uses only two numbers, zero and one, and is the key to how computers and ECMs operate.

■ A gate is an electronic circuit that produces a specific output voltage for given input voltages.

■ An integrated circuit is an electronic circuit that has been reduced in size and placed on the surface of a tiny semiconductor chip.

■ Digital signals are on-off signals, like those produced by a rapidly flipping switch.

■ An analog signal changes in strength (voltage, current, and/or resistance).

■ A computer signal, waveform, or wave is a voltage variation over short periods of time.

■ A vehicle sensor is a transducer that changes a condition into an electrical signal.

■ The computer sends a reference voltage to passive sensors so that a signal can be fed back for processing.

■ Circuit sensing involves using the computer itself instead of dedicated sensors to monitor component and circuit operation.

■ Output drivers control current flow through the actuators.

■ A microprocessor is an integrated circuit capable of analyzing data and calculating appropriate outputs.

■ Computer memory uses gates that are capable of storing data as voltage charges.

■ The three basic types of computer memory are RAM, ROM, and PROM.

■ Actuators allow the computer to alter the operation of other components.

■ A computer network is a series of computers that control different systems but work together to improve overall vehicle efficiency.