Exam 19: Charging Systems

Oscilloscope patterns are being discussed; Technician A says an open or shorted diode can be detected by the waveform on a lab scope without removing the generator from the vehicle. Technician B says the waveform produced by the AC generator after the output moves through the diodes is a straight line because it is a constant DC voltage. Who is correct?

Most AC generator stators use three windings to generate the required amperage output.

All AC generators use an internal fan to move air across the components for cooling.

Which part of the AC generator produces the moving magnetic field?

A rotating magnetic field inside a set of stationary conducting wires is a simple description of a(n) ______.

An alternator is also called an AC generator.

What is pulse width modulation?

An AC generator cannot be liquid-cooled.

The alternating current produced by the AC generator is rectified into DC (direct current) through the use of ______.

Which of the following precautions should be followed whenever working on or testing a charging system?

PCM-controlled AC generators are being discussed. Technician A says the battery current sensor is located inside the AC generator. Technician B says the battery current sensor is a three-wire hall effect type sensor that connects to the PCM. Who is correct?

The output of an AC generator can be as high as 250 volts if it is not controlled.

A whining noise from a malfunctioning AC generator may be caused by a bad ____________________.

A ____________________.circuit in the voltage regulator prevents simple electrical problems such as corroded output terminals from causing high-voltage outputs that could damage delicate electronic components.

What is the purpose of a diode trio?

What are the four types of charging system failure warning systems?

Some AC generators have dual fans to move air across the components for cooling.

How does voltage regulation circuitry located within a PCM control the AC generator output?

Hybrid vehicles are being discussed. Technician A says some hybrid vehicles use a motor/generator that is connected to the crankshaft by a drive belt. Technician B says the motor/generator on a hybrid vehicle is located at the flywheel. Who is correct?

Technician A says the charging system recharges the battery by supplying a constant and relatively low charge to the battery. Technician B says the charging system works on the principles of magnetism to change mechanical energy into electrical energy. Who is correct?