This is the third and final year in the three year Automotive Technology program at Waltham High School. This year the students will study all aspects of engine performance including basic engine operation, mechanical problems, computer controls, electronic fuel injection, forced induction, and emission controls. Students will use the latest in electronic diagnostic test equipment, including computer scanners and oscilloscopes, to diagnose and repair the complex electronic systems used in today’s vehicles. They will finish up the year studying heating and air conditioning systems earning EPA certification for recovery and recycling of refrigerants. In addition to performing the work, students will continue to interact with the customers in order to develop a diagnostic strategy. Students will also be involved in ASE testing throughout the year in several categories
Unit | Timeframe | Big Ideas (Statements or Essential Questions) | Major Learning Experiences from Unit |
|---|---|---|---|
Review shop safety, introduction to engine performance diagnosis | September 4 Weeks | Review of Safety Instruction Introduction to Engine Performance Diagnosis | Shop regulations, review lifts and jacks, safety tests Develop a diagnostic strategy, check service history, research TSB’s, interpret VIN information Diagnose and repair the cooling and lubricating systems |
Diagnose engine mechanical problems | October 4 Weeks | Diagnose and Repair Engine Mechanical Problems Introduction to Ignition Systems | Perform and interpret cylinder compression test, cylinder leakage test, cylinder power balance test, and engine vacuum test. Interpret internal engine noises and leaks. Explain electromagnetic theory and operation |
Computerized engine controls, ignition systems | November 4 Weeks | Ignition Systems Introduction to Engine Computer Inputs | Identify ignition system components. Diagnose and repair ignition system related problems such as no-starting, hard starting and engine misfire on distributor systems, distributorless systems, and coil on plug (COP). Identify primary switching devices and sensor inputs |
Computerized engine controls cont., inputs and sensors | December 4 Weeks | Diagnose and Repair Engine Computer Inputs | Identify commonly used sensors. Explain the difference between analog and digital signals. O2 sensors, heaters and A/F ratio sensors. Identify commonly used actuators. Inspect and test computerized engine control system sensors and actuators |
Computerized engine controls cont., emission control systems | January 4 Weeks | Introduction to Computerized Engine Controls outputs Diagnose and Repair Emissions Control Systems | Identify and understand outputs. Fuel pumps, injectors, solenoids, coils are explained Identify types of pollutants, NOX, CO, HC. Inspect, test, and service PCV, EGR, EVAP, and air injection systems. Inspect and test catalytic converter efficiency. Discuss the role of engine sensors and emissions |
OBD II and Computer communication and networking | February 4 Weeks | Computers(PCM) On Board Diagnostics and Scan Tools | Computer memory RAM, ROM, PROM, KAM are explained. Acronyms and terminology Identify J1962 OBD standards Retrieve and interpret stored OBD-I and OBD-II diagnostic trouble codes. P,B,C,U Codes and their meaning |
Computerized engine controls cont., air induction systems | March 4 Weeks | Diagnose and Repair Fuel, Air Induction, and Exhaust Systems | Identify components of the air induction, fuel, and exhaust systems. Diagnose and repair fuel, air, and exhaust system problems using learned diagnostic strategies |
Heating and air conditioning systems | April 4 Weeks | Introduction to Heating and Air Conditioning Systems | Discuss types of heat exchange, air conditioning theory and operation. Diagnose air conditioning systems. Perform air conditioning recovery, recycling and recharging. Introduction to A/C control systems. Receive AC recycling and recharging certificate |
Clutches, transmissions and differentials | May 4 Weeks | Introduction to Manual Transmissions, Automatic Transmissions, and Differentials | Introduction to transmission and differential operation. Disassemble and identify components of a manual transmission, automatic transmission and differential |