Exam 19: Charging Systems

Most late model vehicles do not have a separate voltage regulator. Instead, voltage regulation is a function of the PCM.

Identify four internal problems of faulty AC generators.

How can an oscilloscope be used to check AC generator output?

Rectification refers to changing alternating current to direct current.

Slip rings and brushes ______.

Integrated voltage regulators ______.

Voltage regulator circuitry in the computer control module controls AC generator output by ______.

Which type of stator winding produces high AC generator charging voltage at low speeds?

On a PCM-controlled AC generator, system voltage is controlled by varying the _____ of the current applied to the field coil.

Technician A says a DC generator is similar in construction to an electric motor. Technician B says DC generators have limited output, especially at low speeds. Who is correct?

Describe the steps in a charging system voltage test.

Technician A says the charging system is needed to keep the battery fully charged and recharge the battery after starting. Technician B say the charging system supplies all the vehicle's electrical current needs after the engine starts. Who is correct?

The motor/generator in a hybrid vehicle ______.

Voltage regulators are being discussed. Technician A says charging voltage is decreased when the battery temperature is low because the battery cannot accept high charging rates at low temperatures. Technician B says the voltage regulator increases the current flowing through the field coil when the battery voltage is low. Who is correct?

The ____________________ is the stationary member of the AC generator.

Technician A says electricity can be generated by moving a magnetic field across an electrical conductor. Technician B says electricity can be generated by moving an electrical conductor across a magnetic field. Who is correct?

A lab scope can be used to check for open or shorted diodes in the rectifier.

When checking AC generator output using an oscilloscope, the correct pattern resembles ______.

Technician A says an a circuit has the regulator on the positive side of the field coil. Technician B says on an isolated field circuit, the regulator may be on the negative or the positive side. Who is correct?

Technician A says increasing the strength of the magnetic field in an AC generator increases the voltage output. Technician B says the voltage regulator controls the strength of the rotor's magnetic field. Who is correct?