Standard

 

 R State Standard         £  Institutionally Developed          College: n/a

 

DET 125 - Electrical/Electronic Systems

Course Description

Introduces basic electrical/electronic systems used on medium/heavy duty trucks and heavy equipment.  Topics include:  introduction to diesel electrical & electronic systems, understanding circuits & circuit devices, developing basic diagnosis & repair skills, and understanding vehicle computer controls.  Classroom and lab instruction on digital meter usage and interpreting is highly emphasized.

 

Competency Areas

Hours

Introduction to Diesel Electrical and Electronic Systems     

Class

1

Understating Circuits and Circuit Devices     

D. Lab

2

Developing Basic Diagnosis and Repair Skills     

P. Lab/O.B.I.

6

Understanding Vehicle Computer Controls     

Credit

4

 

 

 

 

Prerequisite:

DET 121

Corequisite:

     

 

Course Guide

 

Competency

After completing this section, the student will be able to:

Hours

Class

D.Lab

P.Lab/

O.B.I.

INTRODUCTION TO DIESEL ELECTRICAL AND ELECTRONIC SYSTEMS

3

5

10

 

Demonstrate an understanding of the terms and definitions

 

 

 

 

Explain composition of atoms

 

 

 

 

Demonstrate an understanding of the electrical charges in atoms

 

 

 

 

Demonstrate an understanding of the terms relating to electron flow and their definitions

 

 

 

 

Demonstrate an understanding of the direction that current flows in relation to its electromotive force

 

 

 

 

Demonstrate an understanding of the two theories on current flow

 

 

 

 

Demonstrate an understanding of the description of current

 

 

 

 

Demonstrate an understanding of the two factors that determine the amount of current flowing through a conductor

 

 

 

 

Explain two types of current and their voltage sources

 

 

 

 

Explain description of voltage

 

 

 

 

Demonstrate an understanding of the two sources of voltage in vehicle electrical systems

 

 

 

 

Demonstrate an understanding of the description of resistance

 

 

 

 

Demonstrate an understanding of the five factors that influence resistance as current moves through a circuit

 

 

 

 

Demonstrate an understanding of the two results of resistance as current moves through a conductor

 

 

 

 

Explain Ohm’s law

 

 

 

 

Demonstrate an understanding of the formulas for calculating current, voltage, and resistance in a conductor

 

 

 

 

Demonstrate an understanding of the description of power

 

 

 

 

Demonstrate an understanding of the two ways electrical devices can be rated

 

 

 

 

Explain two common electrical devices that are rated in watts

 

 

 

 

Demonstrate an understanding of the three links of magnets and their definitions

 

 

 

 

Demonstrate an understanding of the facts about magnets

 

 

 

 

Demonstrate an understanding of the terms relating to magnetism and electromagnets and their definitions

 

 

 

 

Demonstrate an understanding of the four properties of electromagnets that make them useful in a vehicle’s electrical system

 

 

 

 

Explain three vehicle electrical components that use electromagnetism

 

 

 

 

Calculate current using Ohm’s law

 

 

 

 

Calculate voltage using Ohm’s law

 

 

 

 

Calculate resistance using Ohm’s law

 

 

 

 

Predict changes in voltage, current and resistance in a circuit

 

 

 

UNDERSTANDING CIRCUITS AND CIRCUIT DEVICES

2

5

10

 

Demonstrate an understanding of the terms and definitions

 

 

 

 

Explain six circuit elements on an illustration of a basic vehicle electrical circuit

 

 

 

 

Describe four types of commonly used circuits

 

 

 

 

Demonstrate an understanding of the two power sources for vehicle electrical circuits

 

 

 

 

Demonstrate an understanding of the why and where electrical circuits are grounded

 

 

 

 

Explain wiring diagram symbols that indicate a battery and a ground

 

 

 

 

Describe common control devices, their illustrations, wiring diagram symbols, current factor controlled, and the type of control each has on voltage or resistance in a circuit

 

 

 

 

Explain common protection devices, their illustrations and wiring diagram symbols

 

 

 

 

Demonstrate an understanding of the size categories of blade fuses

 

 

 

 

Demonstrate an understanding of the how fuses, fusible links, and circuit breakers protect the circuits on which they are installed

 

 

 

 

Explain common loads, their illustrations, wiring diagram symbols, and the form of energy into which each converts currents

 

 

 

 

Explain how a device that is electronic is different from a device that is electric

 

 

 

 

Explain P-type semiconductors and N-type semiconductors

 

 

 

 

Describe advantages and disadvantages of using electronic devices as circuits

 

 

 

 

Identify common electronic circuit devices, their illustrations, wiring diagram symbols, and functions in a circuit

 

 

 

 

Identify common conductors, their illustrations and wiring diagram symbols

 

 

 

 

Identify four types of material that are commonly used as insulators in vehicle electrical systems

 

 

 

 

Explain purpose of a wire shield

 

 

 

 

Describe three purposes of wiring hardware

 

 

 

 

Describe common circuit features and their wiring

 

 

 

 

Demonstrate an understanding of the types of wiring diagrams

 

 

 

 

Explain what the color bands found on resistors represent, and use the color bands on a resistor to determine its resistance value

 

 

 

 

Determine correct replacement fuses

 

 

 

 

Use wire color and circuit identification codes to locate circuit information

 

 

 

 

Use wiring diagrams to locate information about circuits

 

 

 

 

Use knowledge of electric/electronic theory and circuit devices to predict changes in current voltage, and resistance in a series circuit

 

 

 

 

Inspect, test, and replace spike suppression diodes/resistors

 

 

 

DEVELOPING BASIC DIAGNOSIS AND REPAIR SKILLS

2

5

20

 

Demonstrate an understanding of the terms and definitions

 

 

 

 

Demonstrate an understanding of the types of common circuits and their electrical characteristics

 

 

 

 

Demonstrate an understanding of the common problems with electrical circuits (types, symptoms, causes)

 

 

 

 

Identify types of electrical diagnostic instruments (names and illustrations, usage, calibrated vs. tested requirements)

 

 

 

 

Explain steps in electrical troubleshooting

 

 

 

 

Explain steps in soldering

 

 

 

 

Describe guidelines for soldering

 

 

 

 

Identify types of circuits and circuit devices on a circuit

 

 

 

 

Perform calculations using units of electrical measurement

 

 

 

 

Prepare to measure current, voltage, resistance, and frequency with a multimeter

 

 

 

 

Calculate resistance in sample circuits

 

 

 

 

Calculate current in sample circuits

 

 

 

 

Calculate voltage drop in sample circuits

 

 

 

 

Calculate voltage in sample circuits

 

 

 

 

Calibrate and make functionality tests on electrical diagnostic instruments

 

 

 

 

Check electrical/electronic circuits with jumper cables

 

 

 

 

Check electrical circuits with a test light

 

 

 

 

Check voltage in electrical/electronic circuits with a multimeter

 

 

 

 

Check voltage drops in electrical/electronic circuits with a multimeter

 

 

 

 

Check current flow I electrical/electronic circuits and components with a multimeter

 

 

 

 

Check continuity and resistance in electrical/electronic circuits and components with a multimeter

 

 

 

 

Find shorts, grounds, opens, and high resistance problems in electrical/electronic circuits

 

 

 

 

Tin a soldering iron or gun

 

 

 

 

Inspect, test, repair, and replace switches, connectors, terminals, and wires of electrical/electronic circuits

 

 

 

 

Inspect, test, and replace fusible links, circuit breakers, and fuses

 

 

 

UNDERSTANDING VEHICLE COMPUTER CONTROLS

3

5

20

 

Demonstrate an understanding of the terms and definitions

 

 

 

 

Describe functions of the basic components of a computer system

 

 

 

 

Identify common computers (microprocessors) in a vehicle

 

 

 

 

Explain types of sensors

 

 

 

 

Explain types of actuators

 

 

 

 

Demonstrate an understanding of the analog and digital signals

 

 

 

 

Describe serial data transfer and parallel data transfer

 

 

 

 

Describe flow of data through a simplified computer system

 

 

 

 

Identify ways to retrieve diagnostic information from vehicle computers

 

 

 

 

Describe SAE fault code identifiers

 

 

 

 

Demonstrate how a potentiometer functions as a sensor

 

 

 

 

Interpret SAE fault code identifiers

 

 

 

 

Use a DVOM to measure reference voltage output from the electronic control module

 

 

 

 

Access vehicle fault codes using the vehicle’s computerized diagnostic system then determine needed repairs

 

 

 

 

 

 

 

 

 

Suggested Resources

 

Media
Print
Audio/Visual
Web
Other

 

Web Manuals

Mitchell Information Systems.  (2008). “Tractor Trailer.net”.  San Diego, California.

Print

 

Multistate Academic and Vocational Curriculum Consortium.  (2007). “Diesel Technology Series”.   Stillwater, Oklahoma.

Norman, Andrew & others.   (2006). Diesel Technology.  Tinley Park, Illinois:  Goodheart-Willcox.
ISBN 13: 9781590707708, ISBN: 1590707702

Norman, A. / Corinchock, J. / Bennett,S. ( 2005 ) Heavy Duty Truck Systems 4th Ed, Delmar Pub. Clifton Park, New York. ISBN 9781401870647

Huzij/ Bennett. (2009). Heavy Equipment Systems. Florence, KY: Delmar Cengage Learning,
ISBN 13: 9781418009502 ISBN 10: 1418009504

 

Posted: 10/09/08