Circuits, batteries, starting and charging, lighting, CAN bus and wiring diagnosis.
40 cards · mixed cards · AI-written, checked twice. Edit anything.
- What is the nominal voltage of a 12-volt automotive battery?
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12.6 volts when fully charged- What does CCA stand for in battery specifications?
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Cold Cranking Amps- What is the primary function of an alternator?
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Generate electrical current to recharge the battery and power electrical systems- At what engine RPM does a typical alternator begin producing rated output?
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Around 1000 to 1200 RPM- What component regulates alternator output voltage?
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The voltage regulator- What is the function of a starter motor?
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To crank the engine for starting- What does a starter solenoid do?
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Engages the starter pinion gear with the flywheel and closes the starter circuit- Typical starter current draw is approximately how many amps?
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150 to 400 amps, depending on engine size- What is CAN bus in automotive systems?
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Controller Area Network, a digital communication protocol linking electronic modules- What are the two communication wires in a CAN bus called?
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CAN High (CAN+) and CAN Low (CAN-)- What are the termination resistors in a CAN bus and their value?
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120-ohm resistors at each end of the network- What is a relay and what is its primary purpose?
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An electromagnetic switch that uses a small current to control a larger current- What are the four terminals on a typical automotive relay?
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Coil positive, coil negative (or ground), switch common, and switch contact- What is the purpose of a fuse in an automotive electrical circuit?
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To protect the circuit from overcurrent by breaking the circuit if amperage exceeds its rating- What amperage rating might a typical headlight circuit fuse have?
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20 to 30 amps
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