ASE Updates Electronic Diesel Engine Diagnosis Specialist (L2) Test

ASE plans to launch an updated version of its Electronic Diesel Engine Diagnosis Specialist (L2) test on Jan. 6. The release will feature the new Composite Vehicle Type 4 (CV4), a generic medium/heavy vehicle equipped with a high-pressure common rail (HPCR) diesel fuel system, an updated exhaust aftertreatment system, and other updated systems and controls.

As is true of the current test, some questions will call for use of the composite vehicle reference. The updated test will use the L2 Composite Vehicle Type 4 (CV4) Reference Booklet, which can be downloaded or requested (printed copy) at no cost from along with the updated L2 study guide. Test takers will receive a booklet at the testing center for use during the test, but should acquire and review a copy prior to the test appointment, according to ASE.

During rollout of the updated test in the first half of 2020, there will be some differences that test takers should note. From January to July of 2020 …
• L2 certification and recertification tests will consist of 75 questions and have a 180-minute 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.

Starting in July, 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 two-hour time limit and will provide immediate pass/fail test results.