xi Workplace Skills features highlight the professional behaviors and traits that employers want, highlighting the workplace employability skills emphasized by the ASE Education Foundation. Green Technology features highlight key items related to sustainability, energy efficiency, and environmental issues. Diagnostic Case Studies help you develop logical troubleshooting techniques and reinforce the 3Cs approach to vehicle diagnosis and repair. Summary feature provides an additional review tool for you and reinforces key learning objectives. Activities extend your learning and help you analyze and apply knowledge. Review Questions allow you to demonstrate knowledge, identification, and comprehension of chapter material. ASE-Type Questions help you prepare for the types of questions encountered on the ASE certification tests.