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ASE Electronic Diesel Engine Diagnosis Specialist Certification Test (L2) Guide

From January to July of 2020, the Automotive Service Excellence (ASE®) Electronic Diesel Engine Diagnosis Specialist (L2) certification and recertification tests will consist of 75 questions and have a 180-minute (3-hour) time limit. Test takers will receive an immediate “notice of completion” rather than a pass/fail score report. Their myASE profile will show “Score Pending” for the test. Official pass/fail test results for all L2 certification and recertification tests will be released through myASE accounts in June 2020.

Starting in July 2020, the L2 certification test will have 55 questions (including 10 unscored research questions). The L2R (recertification) test will have 45 questions. Both tests will have a 2-hour time limit and will provide immediate pass/fail test results.

2020 Revised ASE L2 Test Information
2020 Revised ASE L2 Composite Vehicle Reference Booklet

A. General Inspection and Diagnosis (10%)
B. Electronic Engine Controls Diagnosis (40%)
C. Air Induction Systems Diagnosis (13%)
D. Fuel Systems Diagnosis (18%)
E. Emissions Systems Diagnosis (19%)

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