ASE identifies Light Vehicle Diesel Engines as an individual service area (A9). The light vehicle diesel engine area involves the following diagnosis components:
• Cylinder Head and Valve Train
• Engine Block • Lubrication and Cooling Systems
• Air Induction and Exhaust Systems
• Fuel Systems
Tests.com's ASE A9 Practice Test was written by Dr. John Kershaw, an ASE test prep expert: ASE test question developer; ASE Certified Master Technician; ASE Master Truck Technician; and Auto Industry Technical Instructor. Dr. Kershaw was among the first to receive ASE certification in 1972.