ASE Study Guides L2, S2 and S6 Bundle

Prepare for advanced diesel and electrical diagnostics across medium/heavy vehicles and school buses with the ASE Study Guides L2, S2 and S6 Bundle. This bundle combines three focused study guides covering electronic diesel engine diagnosis, school bus diesel engines, and school bus electrical/electronic systems, giving technicians a strong mix of engine, electrical, and systems-based test prep. With clear explanations, real-world illustrations, and ASE-style practice support, it’s a smart package for professionals looking to strengthen their knowledge and improve their chances of passing multiple ASE exams.

Topics Covered

All L2 study materials include detailed coverage of:

• General Inspection and Diagnosis
• Electronic Engine Controls Diagnosis
• Air Induction Systems Diagnosis
• Fuel Systems Diagnosis
• Medium/Heavy Composite Vehicle Type 4

The included practice test features 70 ASE-style questions with detailed explanations, helping you assess your strengths and focus on areas that need improvement before taking the exam.

All S2 study materials include detailed coverage of:

• General Engine Diagnosis
• In-Chassis Engine Inspection and Repair
• Lubrication and Cooling Systems Diagnosis and Repair
• Air Induction and Exhaust Systems Diagnosis and Repair
• Fuel System Diagnosis and Repair
• Starting System Diagnosis and Repair

The ASE S2 study guide follows the official ASE task list, ensuring you’re reviewing the exact material that will appear on the certification exam. Each section is carefully structured to help you build a deep understanding of diesel engine components, diagnostics, and repair procedures commonly found in school bus applications.

All S6 study materials include detailed coverage of:

• General Electrical System Diagnosis
• Battery Diagnosis and Service
• Starting System Diagnosis and Repair
• Charging System Diagnosis and Repair
• Lighting Systems Diagnosis and Repair
• Gauges & Instrument Warning Devices Diagnosis and Repair

Published in May 2014, this ASE S6 guide covers every major system tested on the School Bus Series S6 certification exam. Each section is supported by dozens of detailed illustrations that help explain real-world diagnostic and repair procedures, making complex systems easier to understand and apply on the job.