ELECTRIC

A computer-controlled charging system is undercharging. A lab scope connected to the ground side of the alternator field indicates a 90 percent duty-cycle. Technician A says the alternator may need to be replaced. Technician B says the on-board computer may need to be replaced. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

A high-side driver controlled heated seat grid system is being diagnosed. The connector from the control module is backprobed and a voltmeter connected to output circuit from the controller to the seat grid. When the system is activated, the voltmeter reads zero volts. Technician A says this system may deactivate the system if a fault is detected. Technician B says the control module is faulty. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

A low voltage on the pressure sensor's supply circuit could be caused by any of the following except: An open in the supply circuit wire. A short to ground in the supply circuit wire. High internal resistance in the sensor. Excessive voltage drop in the supply circuit.

A

Electromagnetic gauges produce needle movement by magnetic forces instead of ____. resistance pressure heat mechanics

A

Network ____ refers to how the modules are connected on the network. architecture backbone connectivity diagramming

A

One form of feedback is for the computer to monitor ____ as a switch, relay, or other actuator is activated. voltage resistance capacitors gauges

A

Pressure switches will usually use a(n) ____ that works against a calibrated spring or other form of tension. diaphragm electromagnet lever piezoelectrical device

A

Technician A says SMR1 and SMR3 are turned on to provide the needed current for the motor generator to start the engine. Technician B says SMR1 is turned on and SMR2 is turned off to allow free flow of current in the circuit. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

Technician A says a full battery test series should be done before testing the starting system. Technician B says the internal condition of the engine has little effect on the operation of the starting system. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

Technician A says if the ignition switch is placed in the RUN position before the timer circuit turns off the interior lights, the timer sequence is shut off and the interior lights turn off. Technician B says a switch in the handle will close the ground path from the actuator when either of the front door handles is lifted. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

Technician A says that most immobilizer systems have a method for the customer to add vehicles keys. Technician B says if only one key is available, it can be used twice in order to enter the programming mode. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

Technician A says the automatic parking system automatically operates the electric steering gear to maneuver the vehicle into a parking spot. Technician B says the automatic parking system can only perform parallel parking procedures. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

Technician A says the blower motor is usually a permanent magnet, single-speed motor. Technician B says the switch position directs current flow to one of the three different brushes in the blower motor. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

Technician A says the microprocessor commands actuators by output drivers. Technician B says that outputs are never controlled by supplying voltage to the actuator. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

Technician A says to test sensor signals, a breakout box can be used. Technician B says sensors can only be tested with a scan tool. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

A

The ____ creates the rotating magnetic field of the AC generator. rotor rectifier commutator stator

A

The ____ test measures the electrical load of the starter when it is actuated. current-draw battery voltage drop compression

A

The approximate inflation time for most air bags is Less than 100 mS About 500 mS About 0.5 seconds Less than 5 mS

A

The computer-driven instrument cluster uses a microprocessor to process information from various sensors and to control the ____. gauge display trouble codes transducer powertrain

A

Unlike gauge sending units, the sending units for a warning light are nothing more than simple ____. switches thermistors lamps resistors

A

Usually the air bag system stores two types of fault codes: active and ____. stored inactive intermittent critical

A

Vehicles that use ISO-K for the communication connection between the module and the scan tool may have their own ____ from individual terminals in the DLC to the module. ​ dedicated circuits intermodules BOB actuators

A

Which of the following is NOT true about a quartz analog speedometer system? The signal from the PM generator is a DC frequency. The signal from the vehicle speed sensor is modified by the VSS buffer. This system uses an A/D converter. The signal from the vehicle speed sensor is an AC voltage.

A

A ____ noise can be caused by shorted diodes or stator, or by a worn rotor bearing. squealing whining whirring rattling

B

A remote keyless entry system is inoperative. Which of the following is the most common cause of the problem? A defective lock solenoid. A weak transmitter battery. A blown transmitter fuse. A burned out receiver module.

B

A(n) ____ is a microprocessor designed to communicate with the BCM. actuator scan tool sensor reader

B

All of the following are types of hybrid air bag modules EXCEPT Solid fuel with argon gas Cooled gas inflator Liquid fuel with argon gas Heated gas inflator

B

By monitoring the thermistor's resistance value, the computer is capable of observing very small changes in ____. current temperature gas voltage

B

In the remote keyless entry (RKE) system, the transponder and receiver system operate ____. only at a very close range at a fixed radio frequency in series without bus communication messages

B

Piezoelectric devices are used to measure ____ by the generation of voltage. voltage drop pressures discharge rate temperature

B

Technician A says the motor turns faster if there are more armature windings connected between the common and high-speed brushes. Technician B says the less counterelectromotive force (CEMF) in the armature, the greater the armature current. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

B

Technician A says the power seat system typically uses stepper motors. Technician B says the rotational direction of the power seat motor is determined by the direction current flows through it. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

B

The battery of a vehicle has "died" three days in a row. Each day the customer was able to start the car after he charged the battery. He was then able to drive the car 150 miles, but the next morning the battery was again discharged. A battery current drain test revealed a 10 mA drain. Technician A says the current drain is excessive and it could be the source of the problem. Technician B says that further testing is required, but it is possible that the battery may need to be replaced. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

B

The main advantage of the ISG system is: Can be used to provide accessory power if the battery fails. Allows for automatic stop/start functions. Increase the life of the brake linings. All of the above.

B

The starter drive is the part of the starter motor that engages the armature to the engine____. starter solenoid flywheel ring gear commutator clutch

B

A deployed air bag has a powdery residue on it. Technician A says this powder is mainly sodium carbonate. Technician B says it may contain corn starch. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

C

A photo cell describes any component that is capable of measuring or determining ____. motion heat light temperature

C

A(n) ____ is an instrument that measures the speed of the engine in revolutions per minute (rpm). speedometer odometer tachometer H-gate

C

All of the following can cause poor radio reception, EXCEPT: loose or corroded battery cable terminals. high-resistance body and engine grounds. an open between the antenna mast and chassis ground. loss of antenna and audio system grounds.

C

Before the headlights are aimed, the vehicle must be checked for proper ____. spirit level bulb type curb height bulb center

C

Technician A says a rear window defogger/antenna module separates the RF signal used by the radio from the electrical current used by the grid. Technician B says usually the top grid lines of the heater grid are unheated and used to receive the AM signals. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

C

Technician A says before performing a voltage output test, a visual inspection and preliminary check of the charging system should be done. Technician B says a voltage output test will indicate if the charging system is working properly. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

C

Technician A says that the automatic headlight system may use a forward facing digital imager camera. Technician B says most adaptive (active) headlight systems require may require initialization or calibration after service. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

C

Technician A says the ISG is a three-phase AC motor. Technicians B says the ISG can convert kinetic energy to storable electrical energy. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

C

Technician A says the electronic cruise control system may use a normally open vent valve. Technician B says the electronic cruise control system may utilize the electronic throttle control system. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

C

The __________ network has all of the modules connected to a central point. linear stub star (or hub) ring

C

The _______________ resistor assures the proper low-voltage reading by preventing float when the switch is open. pull-up transducer pull-down variable

C

The diagnostic system check involves observing the air bag ____ to determine if it is operating normally. deployment flash code warning light manufacturer's specific information

C

The dual-voltage 42-volt system is being discussed. Technician A says the system can use a dual-generator arrangement. Technician B says the system can use a dual-stator, dual-voltage generator. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

C

The high-voltage service plug: Disconnects the inverter/converter from the motor generators. Disconnects the auxiliary battery from the HV battery. Disconnects the HV battery from the system. Provides a connection for the battery charger.

C

The interior lights of a vehicle equipped with an illuminated entry system stay on even after the ignition switch is placed in the "on" position; after a short interval, the lights turn off. Technician A says the input signal from the ignition switch may be open. Technician B says the entry module may be faulty. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

C

When servicing the starter system, disconnect the ____ before disconnecting any of the starter circuit's wires or removing the starter motor. body control module system fuses battery ground cable alternator

C

A ____ system displays visual images onto the inside of the windshield in the driver's field of vision. vacuum fluorescent light holographic combiner movie projector head-up display

D

All of the following are facts about Controller Area Network (CAN) bus diagnostics, EXCEPT: A) normal voltmeter reading on the CAN B (+) circuit with the ignition in the RUN position is between 280 and 920 mv. B) A normal voltmeter reading on the CAN B (+) circuit with the ignition in the OFF position and the bus asleep is zero volts. C) A normal voltmeter reading on the CAN B (-) circuit with the ignition in the RUN position is between 4.08 and 4.72 v. D) A normal voltmeter reading on the CAN B (-) circuit with the ignition in the OFF position and the bus asleep is zero volts.

D

Fiber optics is the transmission of light through polymethyl methacrylate plastic that keeps the light rays ____ even if extreme bends are in the plastic. in solid state dimmed level parallel

D

In a HEV, ____ helps minimize energy loss by recovering the energy used to slow the vehicle. friction braking hydraulic braking inductive braking regenerative braking

D

Some fuel cell systems may require the use of an on-board reformer to extract ____ from liquid fuels such as gasoline, methanol, or ethanol. hydrocarbon oxygen electrical energy hydrogen

D

Technician A says the batteries used in the immobilizer key typically last 10 years. Technician B says the immobilizer module antenna is internal to the radio antenna. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

D

The actual AC generator output should be at least 10% to 20% greater than the ____. battery regulator alternator input load demand

D

The class A bus system is a(n) ____ bus. asynchronous bias voltage high-speed slow-speed

D

Those systems such as engine controls and antilock brakes that require data at a faster rate will communicate on the ____. central gateway (CGW) module CAN bus CAN B bus CAN C bus

D

When there is no current draw and the starter does not rotate, the cause could be open field windings open armature coils broken brushes or springs All of the above

D

Which of the following is an indication of how well a battery would perform if the charging system of a vehicle failed? Cold cranking amps Hot cranking amps Amp-hour rating Reserve capacity

D

____ memory is the ability of the computer system to store changing values in order to correct operating characteristics. Random access Keep alive Volatile Adaptive

D

A gauge that reads high when the ignition switch is placed in the RUN position indicates there is an open in the sending unit circuit. True False

F

A three-minute charge test can be used instead of a hydrometer to test a cell's state of charge. True False

F

Bluetooth technology allows several modules from different manufacturers to be connected using a standard high definition transmission. True False

F

Each computer is connected to the data bus is called a mole. True False

F

High-side drivers complete the actuator control circuit to ground. True False

F

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

F

Illuminated entry systems turn on the courtesy lights after the doors are opened. True False

F

Interval or intermittent wipers use a variable resistor to directly control current flow to the motor. True False

F

Less than rated output during full fielding indicates need for a new voltage regulator. True False

F

Regenerative braking is a method of capturing the vehicles thermal energy in the batteries while it slows down. True False

F

Slower-than-normal cranking speed will result in lower-than-normal amperage. True False

F

The keyless start is an enhancement to the infotainment system. True False

F

The storage function of the computer converts analog to digital signals. True False

F

A hybrid vehicle may also incorporate an engine that uses lean burn technology to maximize efficiency. True False

T

A vent valve that is stuck open may cause the cruise control system to be inoperative. True False

T

Actuators are devices that perform work commanded by a computer. True False

T

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

T

Battery efficiency is reduced as the temperature falls below 82ºF (28ºC). True False

T

False wipes in an automatic wiper system are usually the result of a foreign material on the windshield or from flaws in the windshield that interfere with the system optics. True False

T

Having to add water to a low-maintenance battery can be an indication of a higher-than-specified charging voltage. True False

T

If an automatic transmission vehicle will start in any gear, the neutral safety switch is probably at fault. True False

T

It is normal for some electromagnetic gauges to remain at their last position when the ignition is turned off. True False

T

Magnetoresistive (MR) sensors consist of the magnetoresistive sensor element, a permanent magnet, and an integrated signal conditioning circuit to change resistance due to the relationship of the tone wheel and magnetic field surrounding the sensor. True False

T

Most noise from starters can be traced to starter drives. True False

T

Multiplexing (MUX) networks allow several devices to share signals on a common conductor. True False

T

Sulfating is increased if a battery is left in a discharged state for extended periods of time. True False

T

The adaptive headlight system (AHS) is designed to enhance nighttime safety by turning the headlight beams to follow the direction of the road as the vehicle enters a turn. True False

T

The brain of the computer is the central processing unit. True False

T

The lane departure warning system camera is capable of detecting white lines, yellow lines, or dots in the road and to track the road features. True False

T

The photocell uses light to change resistance. True False

T

The ultra capacitor is a device that stores energy as electrostatic charge. True False

T

When placing a live air bag module on a table or bench, face the trim and air bag up. True False

T

When testing the rear window defogger, the test light remains bright as it is moved the length of each grid. The most likely cause is a poor ground circuit connection. True False

T

Technician A says during a load test, the battery voltage must not fall below 9.6 volts. Technician B says the load applied should be half the cold cranking amp rating. Who is connect? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

c

Technician A says the current capacity rating of a battery depends on the types of materials used in the construction of the battery. Technician B says the amount of electrical energy that a battery is capable of producing depends on the size, weight, and active area of the plates. Who is correct? Technician A only Technician B only Both Technician A and B Neither Technician A nor B

c