ASE Electronic Diesel Engine Diagnosis Specialist Certification Test (L2) Guide
The Automotive Service Excellence (ASE®) Electronic Diesel Engine Diagnosis Specialist (L2) Test contains 45 questions focused on the diagnosis of general diesel engine, electronic diesel engine controls, diesel engine air induction and exhaust systems, diesel fuel systems, and specific fuel systems, including electronic unit injector (EUI), pump-line-nozzle electronic (PLN-E) and hydraulic electronic unit injector (HEUI) systems.
A. General Inspection and Diagnosis (9%)
B. Electronic Engine Controls Diagnosis (60%)
C. Air Induction and Exhaust Systems Diagnosis (13%)
D. Fuel Systems Diagnosis (18%)
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- Engine failure
- A rich-running engine
- Blue exhaust smoke
- Fuel in the exhaust stream
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