Exam 7: Charging Systemscharging System Testing and Service

The charging system of a vehicle is producing 100 amps and 12.4 volts at 1500 RPM with all electrical accessories turned "on." The charging system output specification for this vehicle is 110 amps. Technician A says the alternator needs to be replaced. Technician B says the electrical demand of the vehicle may be exceeding the capacity of the charging system. Who is correct?

A(n) ____ AC generator is usually found in applications that do not require high-amperage output.

Technician A says when testing the charging system, the state of charge of the battery is not a concern. Technician B says to test the battery only if the charging system tests fail. Who is correct?

Technician A says when testing, the ground side, voltage drop should be less than 0.2 volt. Technician B says the total insulated system drops should be less than 0.7 volt. Who is correct?

The voltage drop test determines if the battery, regulator, and AC generator are all operating at ____.

In an electronic regulator, when the AC generator output is controlled by varying the amount of time the field coil is energized, what is this called?

The HEV uses an inverter to invert the DC voltage from the HV battery into ____ voltage for use by the motors.

Any sensing wire voltage drops will increase the system voltage by the amount of the drop.

Describe how to perform the charging system requirement test.

List the areas that could cause charging voltage to be too high.

If the output current is greater than needed, system voltage will fall below specification.

Explain function of the current output test.

Describe how the voltage regulator controls AC generator output?

The ____ circuit supplies the initial current for the field coil that starts the buildup of the magnetic field.

If the solid-state electronic voltage regulator is not in or on the alternator, where would it be located?

Sensing voltage is used by the regulator to determine how much field current is necessary.

The ____ is used to make a quick determination about whether the charging system is working properly.

A ground circuit voltage drop test taken on a vehicle's alternator indicates a 0.965V drop. Technician A says this could cause a problem in the alternator's field current. Technician B says this could affect the output circuit of the alternator. Who is correct?

Why should an AC generator never be operated open-circuit?

The ____ creates the rotating magnetic field of the AC generator.