This ASE T2 cheat sheet compresses the ASE Diesel Engines (Medium/Heavy Truck certification test into a printable rundown of the facts ASE tests most. It's a premium cheat sheet built by Capital Prep — the one premium prep we trust — and it's yours free. Reinforce it with the rest of your free ASE T2 toolkit: the practice test, study guide, and flashcards.
ASE T2 exam at a glance
- Questions: 65 total (55 scored + 10 unscored research questions)
- Time: 90 minutes
- Result: Pass/Fail, with a per-content-area performance breakdown
- Cost: $34 registration per order + $62 per general test (verify at ase.com)
- Experience: 2 years of relevant hands-on work experience, or 1 year plus a qualifying two-year degree
What’s on the ASE T2 cheat sheet
- Fuel System Diagnosis & Repair (16 of 55 — 29%) — the three injection families cold, cylinder cutout/balance test, injector return / back-leakage.
- General Engine Diagnosis (11 of 55 — 20%) — the diagnostic loop, smoke color = the fastest diesel clue, the core tests and what each isolates.
- Lubrication & Cooling Systems Diagnosis & Repair (6 of 55 — 11%) — oil-pressure diagnosis, oil cooler, coolant contamination map.
- Air Induction, Exhaust & Aftertreatment (6 of 55 — 11%) — turbo + charge-air path, boost diagnosis, oil in the CAC.
- Engine Block Diagnosis & Repair (5 of 55 — 9%) — cylinder liners, liner protrusion (stand-out above the deck), wet-liner bottom seal.
- Cylinder Head & Valve Train Diagnosis & Repair (4 of 55 — 7%) — head condition, resurfacing consequences, head bolts.
- Starting & Charging System Diagnosis & Repair (4 of 55 — 7%) — slow cranking with a GOOD (fully charged) battery = HIGH, voltage-drop testing, starter symptoms.
- Engine Brakes (3 of 55 — 5%) — how it works, its purpose on the test, diagnose ELECTRICAL first.
How to use it in your final week
- Front-load Fuel System Diagnosis & Repair — at 16 of the 55 scored questions it is about 29% of the test on its own, so if you master one section from the sheet, make it this one.
- Then work General Engine Diagnosis (11 of 55) — the sheet leads there with the diagnostic loop.
- Then work Lubrication & Cooling Systems Diagnosis & Repair (6 of 55) — the sheet leads there with oil-pressure diagnosis.
- Drill the reversal traps until they are reflex — the most commonly flipped one on this test is confusing an isolated misfire (unit injector, one cylinder) with a global fuel starve.
- Read the sheet the morning of your appointment for a last pass on the memory hooks, then answer every one of the 65 questions — 10 are unscored research items and you are not told which.
The cheat sheet is your review layer — your ASE T2 practice test drives the exam-readiness ring at the top of this page. Download it, review, then take a full practice exam (or drill with the study guide and flashcards) to see where you stand.
ASE T2 cheat sheet FAQ
Yes — the ASE T2 cheat sheet downloads as a PDF at no cost and with no sign-up. It sits alongside Career Employer's free ASE T2 practice test, study guide, and flashcards, so your whole Diesel Engines (Medium/Heavy Truck prep is free in one place.
It condenses the highest-yield Diesel Engines (Medium/Heavy Truck facts into a fast reference, covering all 8 ASE content areas for this test with their exact question counts — from Fuel System Diagnosis & Repair through Engine Brakes — plus the memory hooks and reversal traps ASE tests most.
ASE's official study guide lists T2 as 65 total questions with 55 scored in 90 minutes. The other 10 are unscored research questions ASE uses to build future tests, and you are not told which ones they are — so answer every question.
It is built from ASE's current test specifications and task list for Test T2, including the published per-area question counts. ASE revises task lists periodically, so confirm the live specification at ase.com before test day.
No — the sheet is a cram and review layer, not a full course. ASE also requires two years of relevant hands-on work experience (or one year plus a qualifying two-year degree) for certification, so use the sheet to lock in facts, then work full domain-weighted practice tests to find and fix weak areas.
ASE charges a $34 registration fee per order plus $62 per general test such as T2. A retake is a new test purchase, so verify current pricing on ASE's Dates, Fees & Test Times page before you register.
Fuel System Diagnosis & Repair — it is 16 of the 55 scored questions, about 29% of the test and the largest single area. General Engine Diagnosis is next at 11 questions.
Click the download button or the preview card at the top of this page to open the PDF instantly. Bookmark the page so you can pull it up again the morning of your test appointment.
References
- 1.National Institute for Automotive Service Excellence (ASE). “The Official ASE Study Guide — ASE Medium/Heavy Truck Tests (T1–T8).” ase.com, 2026. ↑
- 2.National Institute for Automotive Service Excellence (ASE). “ASE T2 (Diesel Engines (Medium/Heavy Truck)) Certification Test.” ase.com, 2026. ↑
- 3.National Institute for Automotive Service Excellence (ASE). “Dates, Fees & Test Times.” ase.com, 2026. ↑
- 4.National Institute for Automotive Service Excellence (ASE). “Work Experience Requirements for ASE Certification.” ase.com, 2026. ↑
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