ASE Light Vehicle Diesel Engines Certification — Requirements & Free Practice
US · License preparation
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ASE Light Vehicle Diesel Engines Certification
Voluntary ASE certification in the Light Vehicle Diesel Engines (A9) specialty requires passing the initial certification test and satisfying the applicable repair-technician work experience requirement.
Licensing authority: National Institute for Automotive Service Excellence · Application information
Initial by examination
- Scope
- Initial A9 certification only; A9R recertification and ASE Master Automobile Technician status are distinct.
- Work Experience
- A9 is in the Repair Technician two-year full-time (or part-time equivalent) category. ASE permits applicable vocational training credit toward part of the requirement and allows testing before experience approval; certification is withheld until experience is approved.
ASE Light Vehicle Diesel Engines (A9) Certification Test
- Provider
- National Institute for Automotive Service Excellence
- Format
- Computer-based multiple-choice certification test at a test center
- Exam questions
- Total questions: 60; Scored questions: 50; Unscored questions: 10; The total includes the scored and unscored questions.
- Time limit
- 75 minutes
Examination outline
- General Diagnosis (18%)
- Cylinder Head and Valve Train Diagnosis and Repair (10%)
- Engine Block Diagnosis and Repair (10%)
- Lubrication and Cooling Systems Diagnosis and Repair (12%)
- Air Induction and Exhaust Systems Diagnosis and Repair (24%)
- Fuel System Diagnosis and Repair (26%)
Examination sources
- ASE A-Series test page
Study Guides, linked current guide
- ASE Automobile Study Guide
p. 3, task-list scope statement
- ASE Automobile Study Guide
p. 50, A9 Test Specifications and Task List
- ASE Automobile Study Guide
p. 53, end of A9 Task List
- ASE Automobile Study Guide
p. 4, A9 certification test row
- ASE Automobile Study Guide
p. 4, certification test footnote
- ASE Automobile Study Guide
p. 4, A9 name row
- ASE Register Now
In Person at a Test Center
- ASE Register Now
myASE registration
- ASE A-Series test page
Registration Dates, Fall Registration
- ASE A-Series test page
Testing FAQ, scheduling