Guide library

How Vehicle Systems Work

Plain-language explanations of major vehicle systems.

Combustion, airflow, fuel, timing, lubrication and cooling.

Automatic, manual, CVT, differential and axle fundamentals.

Hydraulics, friction components, assist, ABS and electronic controls.

Springs, dampers, joints, steering assist and wheel angles.

Battery, starter, alternator, wiring, grounds and vehicle networks.

Coolant circulation, thermostat control, radiator airflow and pressure.

Fuel pressure, injectors, spark, airflow and engine-control inputs.

Catalysts, oxygen sensors, evaporative controls and exhaust flow.

Pressure, load, tread, balance and alignment.

What diagnostics monitor and why codes need testing and context.

Airbags, stability control, automatic braking and lane support.

Blower airflow, refrigerant cooling, engine heat and air doors.

How vehicle design, conditions, maintenance and driving patterns affect energy use.

Displays, audio, antennas, connectivity, navigation and control modules.

Drag, lift, airflow, cooling and high-speed stability.

Traction batteries, inverters, regenerative braking and charging.