Lesson 1.12 — Engine Diagnosis with Oscilloscope, DMM, and Scan Tool | ASE A1 Engine Repair

Lesson 1.12 — Engine Diagnosis with Oscilloscope, DMM, and Scan Tool | ASE A1 Engine Repair Three witnesses, one engine. The scan tool's counters, the multimeter's voltage drops, and the scope's waveforms each have a jurisdiction; this lesson assigns the right tool to the question and cross-examines all three on one weak cylinder. ASE A1 tasks covered in this lesson: A12. CHAPTERS 0:00 Title & Overview 0:42 Scan tool showing misfire counters 1:29 Current clamp around the starter cable 2:14 Pressure transducer in the intake 3:05 Worked Case: The No-Crank The Meter Settled 3:49 Worked Case: Three Tools, One Cylinder 4:38 Pause And Answer 5:00 Explanation 5:43 Recap Card WORKBOOK Follow along on page M1-12 of the ASE Prep Lab A1 Workbook (printable): follow-along worksheets keyed to every lesson, the full 300-question prep bank with explanations for every answer, and three timed 55-question mock exams. https://www.etsy.com/listing/4605330923 ERRATA — HELP US KEEP THIS ACCURATE Spot an error in this lesson? Report it in the comments. Corrections are pinned on the video, and the workbook errata page is updated first. Built from ASE's published A1 task list. Not affiliated with or endorsed by ASE.