Automotive
A reading of 432 shows on the face of the meter set to the millivolt scale. The reading means
0.432 volts
Terminal 16 of the OBD-II data link connector is used for what?
12 volts positive
A high-speed bus network normally uses two ____ ohm resistors, one at each end of the network.
120
If two 4-ohm speakers are connected in parallel, meaning positive (+) to positive (+) and negative (-) to negative (-), the total impedance will be ________.
2 ohms
The highest amount of resistance that can be read by the meter set to the 2k ohm scale is
2,000 ohms
Which terminal of the OBD-II data link connector is the signal ground for all vehicles?
5
If two 4-ohm speakers are connected in series, meaning the positive (+) of one speaker is connected to the negative (-) of the other speaker, the total impedance will be ________.
8 ohms
When testing a relay using an ohmmeter, which two terminals should be touched to measure the coil resistance
86 and 85
IF a digital meter face shows 0.93 when set to k ohms, the reading means
930 ohms
A Bluetooth signal can typically travel____
Both A and B
XM radio service uses _____ to transmit the audio signal.
Both A and B
An aftermarket satellite radio has poor reception. Technician A says that a lack of a proper ground plane on the antenna could be the cause. Technician B says that mountains or tall buildings can interfere with reception. Which technician is correct?
Both Technicians
Technician A says that a good relay should measure between 60 and 100 ohms across the coil terminals. Technician B says that OL should be displayed on an ohmmeter when touching terminals 30 and 87. Which technician is correct
Both technicians
Where is connector C250 located?
Under the dash
This symbol is a wiring diagram indicates___. (---------->)
a male terminal
When using the test light to probe for electrical power the alligator clip is connected to
either A or B
This is the electrical symbol for a(n)
electric motor
A high-impedance meter
has a high internal resistance
An automatically dimming mirror used to
help prevent the Troxler effect
A voltmeter should be connected to the circuit being tested
in parallel
When testing a relay between terminals 30 and 87a, with the relay turned off, there should be ____ resistance
low
When selecting a meter, accuracy ratings that are ___ indicate more precise meters.
lower
An ohmmeter should be connected to the circuit or component being tested
only when no power is flowing (electrically open circuit)
A(n) ________ is a break in the electrical circuit that prevents current from flowing and operation an electrical device.
open circuit
All of these could cause the wiper motor to run but NOT move the wipers, EXCEPT_____.
poor ground connection at the wiper switch
More than one signal can be carried by a radio wave using a process called
sideband operation
When testing a diode with the meter set on "Diode Check", a reading of 0.6 volts is obtained. This indicates that the diode being tested is a
silicon diode
Two-speed wiper motors generally use _____ to achieve the two speeds.
speed control brushes
In this diagram the number "0.5" refers to
the size of the wire
The internal resistance of any meter is only effective if the meter is set on the _________ scales
voltmeter
A ___ is the time and distance two consecutive points, either high or low.
wavelength
Technician A says that module communication networks are used to reduce the number of wires in a vehicle. Technician B says that a communications network is used to share data from sensors, which can be used by many different modules. Which technician is correct
Both technicians
Technician A says that most horn circuits use a relay and the current through the relay coil is controlled by the horn switch or body control module. Technician B says that a scan tool can be used to test the horn circuits. Which technician is correct?
Both technicians
Technician A says that there is often more than one circuit being protected by each fuse. Technician B says that more than one circuit often shares a single ground connector. Which technician is correct?
Both technicians
Which of these is safe for use in circuits with electronic components
LED test light
Which of these is a term used to describe when information is added to a constant frequency?
Modulation
Technician A says that a radio can receive Am signals, but not FM signals, if the antenna is defective. Technician B says that a good antenna should give a reading of about 500 ohms when tested with an ohmmeter between the center antenna wire and ground. Who is right?
Neither Technician
Technician A says that a scan tool is usually needed to aim headlights. Technician B says that the keyless entry key fob is used to wake up the BCM, which usually is responsible to turn on the interior lights. Which technician is correct?
Technician B
Technician A says that radios can be turned on without connecting the speakers to test the radio lighting. Technician B says that speakers reproduce the original sound and their impedance should be matched. Who is right?
Technician B
Technician A says that the bulb trade number is the same for all bulbs of the same size. Technician B says that a dual-filament bulb has different wattage.
Technician B
The rain sense module (RSM) can turn on the wipers by communication with _____
The BCM
A technician replaced one HID (High Intensity Discharge) headlight due to road debris damage. Which is the MOST likely result?
The headlight color will be different
DVM set to read DC volts is connected at 6 and 14 of the DLC. The meter reads 2.5 volts with the key on, this indicates
The wires are shorted together
A loose or broken ground wire can cause more than one component to malfunction
True
Speaker polarity can be tested using a small battery.
True
The horn relay is controlled by the horn button and/or the BCM
True
This symbol represents a ________.
A component that is case grounded
What is serial data?
A series of rapidly changing voltage signals
On a wiring diagram, S110 with a ".8 BRN/BLK" means
A splice of a brown with black stripe, wire size being 0.8 square millimeters (18 gauge AWG)
The electronics in the rain-sense wiper module can detect the presence of rain drips under various lighting conditions. Which of these solid state components is used to sense rain drops?
All of these
Wiring schematics have which information about circuits?
All of these
A meter used to measure amperes is called a(n)
Ammeter
Vehicles equipped with illuminated entry feature typical use _____ to command the interior lights ON.
Any of these
Light emitting diodes (LED) are used for lighting because they ____
Any of these answers
How can a test light be used to test a ground connection?
By connecting the tip of the test light to a good ground with the other end to the positive terminal of a battery
What device passes AC interference to ground and blocks DC voltage, and is used to control radio interference?
Capacitor
When working on a hybrid vehicle, which type of meter is recommended?
Cat III or Vat IV
Which of these SAE network categories is the slowest in speed?
Class A
What could happen if the meter leads were connected to the positive and negative terminals of the battery while the meter and leads were set to read amperes
Could blow an internal fuse or damage the meter
An antenna lead-in wire should have how many ohms of resistance between the center terminal and the grounded outer covering?
Infinity (OL)
Which of these will cause the brake lights to turn on when the brake pedal is depressed?
Either The pedal sensor or A brake light switch, depending on the vehicle
Interior overhead lights (dome lights) are operated by switches that are located
Either on the dash or In the door handle depending on application
Which of these should never be used as windshield washer fluid?
Ethylene glycol
Most horns are grounded through a fusible link.
False
The satellite radio antenna can be mounted on a fiberglass or composite spoiler.
False
The voice recognition system microphone is usually located near the glove box door.
False
The positive side of a circuit usually uses what type of a connector, according to the text?
Female
The symbol is the figure below indicates which of these?
Ground
Which of these lighting systems could result in an electrical shock hazard if proper precautions are not followed?
HID lights
What type of light should not be touched using bare hands?
Halogen Bulbs
The number of times a particular waveform repeats itself in given amount of time (frequency) is measured in
Hertz
On a vehicle equipped with a remote start system, which of these would cause the system to not work?
Hood is open
Which type of DMM can measure current when clamped around a conductor?
Inductive
Two technicians are discussing finding a short to ground using a test light. Technician A says that the test light, connected in place of the fuse, will light when the circuit that has the short is disconnected. Technician B says that the test light should be connected to the positive (+) and negative (-) terminals of a battery during this test. Which technician is correct
Neither Technician
A module is also know a
Node
Which of these tools is used for a reading of infinity between the center antenna lead and the antenna?
Ohmmeter
Why should a technician never touch the glass ampoule of the halogen bulb?
Oils from a finger can cause a shorter service life
For an electrical device to operate, it must have
Power and a ground
This drawing is a representation of a(n) ________.
Relay
All switches illustrated in schematics are
Shown in their normal position
With which signal patterns is the RMS reading the same as the average reading
Sine wave
Technician A says a CANDi module will flash the RED LED rapidly if communication is detected. Technician B says A twisted pair is where two wires are twisted to prevent electromagnetic radiation form affecting the signals passing through the wires. Who is correct?
Tech B
Technician A says that a braided ground wire is best to use for audio equipment to help reduce interference. Technician B says to use insulated 14 gauge or larger ground wire to reduce interference. Who is right?
Technician A
Technician A says that a break-out box (BOB) used to access the BUS terminals while using a scan tool to activate the modules. Technician B says that a BOB can be used to switch the fuel pump on and off. Who is right?
Technician A
Technician A says that daytime running lights (DRLs) light the headlights, usually at reduced intensity, whenever the engine is running. Technician B says high-intensity discharge (HID) headlights are brighter and have a yellow tint. Who is right?
Technician A
Technician A says that high-intensity discharge (HID) headlights are brighter and have a blue tint. Technician B says that one defective turn signal bulb can cause the turn signal on the affected side to stop blinking (flashing). Who is right?
Technician A
Technician A says that radios receive AM and FM signals that are broadcast through the air. Technician B says that the radio antenna is used to induce a very large voltage signal as an input into the radio from the electromagnetic energy from the broadcast station. Who is right?
Technician A
A short circuit can be located using a
all of the above
The ability to measure AC current is useful when diagnosing
alternator function
The DMM is set to read ohms. The reading shown means (OL)
an open circuit
When measuring resistance, a reading of OL, on the DMM indicates
an open circuit
The adaptive front lighting system (AFS) will _____ if there is a fault in one of the front headlights.
be disabled
In a schematic, a wire is labeled "0.8 BLK/WHT." The wire is
black with white stripe
Digital meters functions for automotive testing should include
both A and B
To prevent blowing the meter fuse in a DMM
both A and B
When interpreting meter reading is auto ranging mode
both A and B
Which term is used to describe the resolution of a meter
both A and B
A bolt of lightning generates broad radio frequency bandwidths known as
both B and C
One way to check the adaptive front light system (AFS) is to
check that the system performs a self-test during start-up
In this diagram the notation "C202" indicates
connector # 202