GTC 141 - Electrical, Fuel, Emissions

4 Contact Hours, 3 Credits
2 lecture periods 2 lab periods


Diagnose automotive electrical, fuel, and emissions systems.

Course Learning Outcomes

1. Demonstrate knowledge of automotive engine fundamentals.
2. Connect a scan tool and access diagnostic trouble codes and data.
3. Diagnose common emission system problems.
4. Perform engine mechanical tests to diagnose drivability and emissions issues.
5. Perform fuel system pressure and volume tests. 
6. Diagnose common ignition system problems related to drivability and emissions problems.

1. Tools, Test Equipment and Service Information
   1. Identify and explain the uses of basic electrical test instruments and mechanical test equipment. 
   2. Identify and explain the uses of input sensor testers and simulators.
   3. Identify and explain the uses of output device testers.
   4. Identify and explain the uses of starting and charging system testers and oscilloscopes.
   5. Identify and explain the uses of exhaust gas analyzersI and service manuals.
   6. Explain how to use schematics and troubleshooting charts.
   7. Identify and explain the purposes of manufacturer hotlines and computers in the automotive shop. 
2. Electricity and Electronics Fundamentals
   1. Explain the electron movement theory or electricity. 
   2. Identify basic electrical circuits and measurements.
   3. Identify and explain the purpose of vehicle wiring and connectors. 
   4. Identify and explain the purpose of common vehicle electrical devices. 
   5. Explain the construction of common semiconductor devices. 
   6. Identify the major components of vehicle start and changing systems. 
3. Ignition System Fundamentals
   1. Identify and explain the purposes of the ignition coil, module, and triggering devices. 
   2. Explain how the spark is developed in electronic and contact point distributor ignition systems. 
   3. Identify and explain the purpose of vacuum and centrifugal spark advance systems. 
   4. Identify and explain the purposes of each of the major components of the ignition secondary system. 
4. Fuel System Fundamentals
   1. Identify and explain the purposes of fuel tanks, fuel pumps, and fuel filters. 
   2. Identify and explain the purposes of major components of fuel injection systems. 
   3. Identify and explain the purposes of fuel pressure regulators. 
   4. Identify the differences and similarities between pulsed and fixed injectors. 
   5. Identify the differences and similarities between throttle body and multiport fuel injection systems. 
   6. State the major difference between gasoline and diesel engine fuel injection systems. 
   7. State the purposes of intake manifolds and plenums. 
   8. State the purposes of air filters
   9. State the purposes and designs of superchargers and turbochargers.
5. Emissions Control and Exhaust System Fundamentals
   1. Identify the three major pollutants produced by internal combustion engines.
   2. Identify the major types of internal engine modifications for emissions control and describe their purpose. 
   3. Identify the major types of external emissions controls and describe their purpose and function. 
   4. Explain how the use of emissions controls have been affected by the introduction of on-board computer systems. 
   5. Identify the purposes of the exhaust system and its major components. 
6. Fuel System Diagnosis and Repair
   1. Check the operation of fuel injection systems. 
   2. Check for the correct air-fuel ratio. 
   3. Use scan tools and multimeters to check fuel injection components. 
   4. Use fuel pressure testers to check electric fuel pumps. 
   5. Check operation of air control devices. 
   6. Adjust idle speed of fuel injection systems.
   7. Clean throttle bodies and fuel injectors. 
   8. Remove, service, and replace fuel injection components. 
7. Emissions Control and Exhaust System Diagnosis and Repair
   1. Describe common state emissions testing programs. 
   2. Diagnose problems in emissions system components. 
   3. Perform an OBD II drive cycle. 
   4. Diagnose EGR problems.
   5. Diagnose evaporative emissions control system problems.
   6. Perform an exhaust gas analysis.
   7. Replace emissions system components.
   8. Diagnose exhaust system problems.
   9. Replace exhaust system components.