Networking
a year ago
ryanleon
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20 QuestionsShow answers
  • Question 1
    30 seconds
    Q.

    High speed CAN uses only CAN high signal wires.

    answer choices

    True

    False

  • Question 2
    30 seconds
    Q.

    Low speed CAN has a CAN high signal wire.

    answer choices

    True

    False

  • Question 3
    30 seconds
    Q.

    If a single module is not communicating on a CAN network, what is the best first step?

    answer choices

    Verify power and ground for that module

    Install the breakout box to Gateway and view the module's waveform with the DSO

    Inspect for marten bites

    Verify an LED test light flickers when back-probing another CAN module

  • Question 4
    30 seconds
    Q.

    In a CAN or LIN network that has no fault, the signal is the same throughout the network, no matter where it is viewed.

    answer choices

    True

    False

  • Question 5
    30 seconds
    Q.

    Where do modules get their power and ground for communication?

    answer choices

    From Gateway (J533)

    Power from the Gateway (J533), and ground through its housing

    Ground through the Gateway (J533), and power from their individual wiring harnesses

    Power and ground through their individual wiring harnesses

  • Question 6
    30 seconds
    Q.

    What is true about LIN (Local Interconnect Network)?

    answer choices

    It allows a CAN (LIN master) module to control and receive information from modules that are not on a CAN network

    It allows a LIN (slave) module to wake up a CAN module

    It is one of the fastest networks that exist

    It is not used anymore

  • Question 7
    30 seconds
    Q.

    CAN and LIN communication is best described as:

    answer choices

    Electrical current used as a language between modules

    Voltage as a language between modules

    It is a form of PFM

    Electrical resistance as a language

  • Question 8
    30 seconds
    Q.

    How do high speed CAN signals differ from low speed CAN signals?

    answer choices

    Where am I?

    High speed CAN's CAN low signal always gets pulled high

    Low speed CAN's CAN high signal always gets pulled low

    The dominant and recessive voltage amplitudes are different

  • Question 9
    30 seconds
    Q.

    Why are CAN high and low signal wires twisted together?

    answer choices

    Martens are unable to bite a single wire

    It's easier to identify the matched set during repairs

    Any electrical interference will affect them equally keeping differential voltages valid

    So each wire can detect the messages sent the opposite direction

  • Question 10
    30 seconds
    Q.

    If low speed CAN has an open circuit in one of its wires, what will happen?

    answer choices

    The control modules will still function normally, but have faults for single wire mode

    The control modules will only partially function, but have faults for single wire mode

    No faults will set because it's a fault-tolerant system

    No communication is possible because it's not a fault-tolerant system

  • Question 11
    30 seconds
    Q.

    When should bandwidth limitation (BWL) be off?

    answer choices

    for low frequency signals

    for high frequency signals

    the start of diagnosis

    my day off

  • Question 12
    30 seconds
    Q.

    When should a multimeter be used to evaluate the quality of network communication signals?

    answer choices

    When it's a misdiagnosis or comeback

    When power and ground have been verified at all modules

    When you've given up

    Never

  • Question 13
    30 seconds
    Q.

    What type of signal is displayed?

    answer choices

    Analog

    Digital

    Digilog

    Anital

  • Question 14
    30 seconds
    Q.

    What type of signal is displayed?

    answer choices

    Analog

    Digital

    PFM

    Wait, what?

  • Question 15
    30 seconds
    Q.

    Local Interconnect Network (LIN) uses a single wire for communication.

    answer choices

    False

    True

  • Question 16
    30 seconds
    Q.

    If a CAN module does not have power at it's individual wiring harness connector, what will the network signal look like at that same connector?

    answer choices

    It will be 0V, no matter which network

    It will be approximately recessive voltage for it's type of network

    It will be a normal waveform for the type of network protocol used

    It will default to source voltage

  • Question 17
    30 seconds
    Q.

    If there is an open circuit between a CAN master module and one of it's LIN components, what will the network signal look like at that LIN component?

    answer choices

    It will be 0V

    It will be continuous source voltage

    It will be continuous recessive voltage

    It will appear like a normal LIN network signal

  • Question 18
    30 seconds
    Q.

    What is the most likely cause of the displayed waveforms?

    answer choices

    Bandwidth Limitation is turned on

    Bandwidth Limitation is turned off

    There is a short between the low-speed and high-speed CAN

    There is a short between the high-speed and low-speed CAN

  • Question 19
    30 seconds
    Q.

    In a MOST network, what is meant by "attenuation"?

    answer choices

    The attention level of each module

    The reduction in light intensity

    The interference of electromagnetism

    The interference of short-wave radio signals

  • Question 20
    30 seconds
    Q.

    If you cannot communicate with a single module on a network, what is the best next step?

    answer choices

    Connect the DSO at the component and evaluate the network signal

    Connect the breakout box and evaluate the network with a DSO

    Connect the breakout box and evaluate the network with a DVOM

    Check power and ground at that module

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