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Stop. Think. Act. Ready for a quick mental run‑through before high‑voltage work? Take a breath. Here we go. Stop. What’s the exact task? Say it out loud in one sentence. What are you touching, and why? If you can’t explain it simply, pause until you can. Think. Is the OEM procedure open and right beside you? Don’t trust memory. Open the doc, pin it nearby, and follow today’s revision—no guessing, no “I’ve always done it this way.” PPE check. Head to toe. Gloves rated for the job, face and eye protection, arc gear as required. If anything’s worn or sketchy, swap it now. Helmet hair is temporary; safety is cute forever. Meter check. Right tool, right rating. Confirm the meter’s CAT rating matches the environment and the voltage you’ll see. Leads in good shape, settings correct, batteries alive. If you’re not sure, you’re sure you need a different meter. Act, step one: disable and tag. Power down using the correct method. Lock it out. Tag it out. Make it obvious. Tell the people who need to know. Wait the required time. Not a guess—use the OEM time. This is the part where patience beats adrenaline. Perform your three‑point test. Known live, then the circuit, then known live again. Prove the meter, prove the absence, prove the meter one more time. Trust, but verify. Before reconnecting, re‑verify. Conditions the same? Barriers in place? Tools accounted for? Procedure still open? If anything changed, stop and reassess. Finish strong: document. What you did, what you found, and anything that needs follow‑up. Future you—and your team—will thank you. One more breath. Quick recap: confirm the task, open the OEM procedure, check PPE and meter CAT rating, disable and tag, wait the required time, three‑point test, re‑verify before reconnecting, document. That’s your Stop–Think–Act loop. Slow is smooth. Smooth is safe. You’ve got this.

Course

Modern Automotive Systems: Fundamentals, Maintenance, and Diagno

10 units46 lessons

Topics

Automotive engineeringMechanical engineeringElectrical engineeringElectronics/embedded systemsControl systems engineeringThermodynamics

About this course

This beginner-to-lower-intermediate course builds working knowledge of how modern vehicles operate across powertrain, chassis, braking, electrical, and electronic control systems. Emphasis on shop safety and HV awareness, proper tooling, torques, and use of service information. Cover engine fundamentals, fuel/ignition, engine management and closed-loop control; transmissions and drivelines; suspension, steering, tires, and basic dynamics; hydraulic brakes, ABS/ESC; 12V electrical, schematics, voltage-drop testing; OBD-II, CAN, data parameters; HVAC and cooling; emissions and aftertreatment. Develop practical skills in inspection, routine maintenance, and structured diagnostics: symptom mapping, test plans, and common fault patterns, plus ADAS and hybrid/EV awareness.