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Order the high-level steps of a coordinated upshift from first to last.

  • ECU ramps torque back in while TCU completes clutch pressure calibration.

  • TCU/ECU exchange shift-complete acknowledgment and resume normal torque control.

  • TCU requests engine torque reduction from ECU over the bus.

  • Shafts synchronize and the new gear pair carries torque.

  • Transmission hydraulics modulate clutch pressures to release/apply the elements for the new gear.

  • ECU applies a fast torque cut (spark/throttle) to reduce input torque.

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.