Covers automotive air conditioning systems using extensive laboratory activities. Focuses on electronic controls, refrigeration components, and cooling system performance as it applies to the proper diagnostics and repairs of the automotive HVAC system. Covers more controls and auto temp than AUTO 225. Recommended prerequisite AUTO 225.
Goals, Topics, and Objectives
- Air Conditioning System
- Heating and Ventilation System Service
- Evaluating HVAC system performance
- EATC and DATC systems
- Climate Controlled Seating
- Air Management systems
- Perform cooling system cap and recovery system tests, determine necessary action.
- Leak test A/C system; determine necessary action.
- Inspect A/C condenser for airflow restrictions; perform necessary action.
- Remove and install expansion valve or orifice (expansion) tube.
- Identify (by label application or use of a refrigerant identifier) and recover A/C system refrigerant.
- Recycle refrigerant.
- Evacuate and charge A/C system.
- Identify the two common expansion type automotive A/C systems.
- Identify refrigerant type and purity.
- Describe basic refrigeration theory.
- Describe effects of automotive refrigerant on the environment.
- Demonstrate touch test to evaluate system performance.
- Analyze system performance decide state of charge form gauge readings.
- Use stand alone and scan tool diagnostics to view faults and actuate outputs.
- Diagnose ATC faults.
Assessment and Requirements
Measurable objectives will be evaluated by the instructor based on accuracy and proficiency and completion of assigned tasks. Attendance, homework, class participation, lab activities, quizzes and tests will be used as criteria to assign the student’s final earned grade for this class.
Students must take notes on demonstrations, carefully read and analyze assigned course materials and perform exercises to determine their competence in servicing modern vehicle air conditioning systems.