Deck 10: Vehicle Communication Networksvehicle Multiplexing Diagnostics

Question 1

Wireless networks require the use of one wire to transmit information.

Answer 1

False

Question 2

Technician A says the LIN bus is a single master, multi slave module, low-speed network. Technician B says the local interconnect network (LIN) was developed to take the place of the CAN bus system. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Answer 2

A

Question 3

The Controller Area Network (CAN) system can support baud rates up to 5 Mb/s.

Answer 3

True

Question 4

The ISO-K bus protocol allows for bidirectional communication on a single wire.

Question 5

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

Question 6

Controller Area Network (CAN) bus diagnostics is being discussed. Technician A says a scan tool is used to access the central gateway module for the bus network. Technician B says if the scan tool can communicate with the central gateway module, then the CAN C circuit is at fault. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 7

Technician A says the circuitry of the CAN bus usually consists of a pair of twisted wires. Technician B says for digital data to transfer, the CAN bus voltage is simultaneously pulled high on one circuit and pulled low on the other. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 8

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

Question 9

All of the following are facts about Controller Area Network (CAN) bus diagnostics, EXCEPT :

A) 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.

Question 10

The Controller Area Network (CAN) was developed to supplement the local interconnect network (LIN) bus system.

Question 11

Technician A says J1850 protocol is the class B standard for OBD II. Technician B says the J1850 standard allows for four different versions based on baud rate. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 12

The Media Oriented System Transport (MOST) cooperation data bus system uses fiber optics to transmit data.

Question 13

Technician A says wireless networks can connect modules together to transmit information with the use of electromagnetic field. Technician B says Bluetooth technology allows several modules from different manufacturers to be connected using a standardized radio transmission. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 14

The local interconnect network (LIN) bus is a UART singe master, multiple slave, low-speed network.

Question 15

Multiplexing (MUX) wiring systems use bus data links that connect modules together.

Question 16

Controller Area Network CAN B bus diagnostics is being discussed. Technician A says some modules do not set specific codes that isolate the type of fault. Technician B says if the fault code indicates both CAN B+ and CAN B- circuits are low or high, a total bus failure has occurred. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 17

Controller Area Network (CAN) bus diagnostics is being discussed. Technician A says the first step is to verify the customers complaint. Technician B says you must determine which bus network is at fault. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 18

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

Question 19

Technician A says ISO 9141-2 is not a network protocol since it can be used only for diagnostic purposes. Technician B says ISO 9141-2 is a Class B system that has a baud rate of 10.4Kb/s. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 20

Technician A says modules on the Media Oriented System Transport (MOST) data bus use an LED, photodiode, and a MOST transceiver to communicate with light signals. Technician B says the Media Oriented System Transport (MOST) system uses fiber optics to transmit data at an extremely fast rate. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 21

Some ____ provide a vehicle module scan function that will query all of the modules on the bus to respond and then list those that did reply.

A) bus systems
B) scan tools
C) PCMs
D) OBD II vehicles

Question 22

Class C is a(n) ____ protocol with a baud rate between 125 kb/s and 1,000 kb/s, used for functions that require real-time control.

A) asynchronous
B) high-speed
C) medium-speed
D) low-speed

Question 23

The ____ network has all of the modules connected to a central point.

A) linear
B) stub
C) ring
D) star

Question 24

Network ____ refers to how the modules are connected on the network.

A) architecture
B) backbone
C) connectivity
D) diagramming

Question 25

The media-oriented system transport (MOST) bus uses ____to transmit data at a speed of up to 25 megabits per second (25 Mb/s).

A) radio waves
B) fiber optics
C) smart sensors
D) slave modules

Question 26

____ have increased system reliability through the reduction of circuits and improved efficiency by less power demands and more accurate control.

A) Diagnostic trouble codes
B) Live data streams
C) Multiplexing systems
D) By-directional controls

Question 27

All of the following can cause total bus failure of the J1850 VPWM bus system, EXCEPT :

A) Open bus wire to the BCM.
B) Bus wire shorted to ground.
C) Bus wire shorted to battery voltage.
D) Internal short in a module.

Question 28

The ring (or loop) network has the modules wired in ________.

A) parallel
B) series
C) series-parallel
D) None of the above

Question 29

Each module on the Programmable Communication Interface (PCI) system supplies:

A) its own bias.
B) its own termination.
C) its own variable pulse-width modulation (VPWM) voltage.
D) All of the above

Question 30

The class A bus system is a(n) ____ bus.

A) asynchronous
B) bias voltage
C) high-speed
D) slow-speed

Question 31

The local interconnect network (LIN) bus is a supplemental bus network that is used along with the vehicle's main ____ system.

A) module
B) data link
C) multiplexing
D) CAN

Question 32

A multiplexing (MUX) wiring system uses ____ that connect each module and allow for the transporting of data from one module to another.

A) nodes
B) bus data links
C) piezoelectrics
D) sensors

Question 33

Those systems such as engine controls and antilock brakes that require data at a faster rate will communicate on the ____.

A) central gateway (CGW) module
B) CAN bus
C) CAN B bus
D) CAN C bus

Question 34

DTCs that are assigned to the vehicle's body systems and control modules are called ____.

A) U-codes
B) B-codes
C) K-codes
D) P-codes

Question 35

The best method of determining proper voltage on the J1850 Bus system is with a(n) ____.

A) lab scope
B) voltmeter
C) DMM
D) ammeter

Question 36

The J1962 breakout box (BOB) provides:

A) initiation of data bus transmission.
B) a pass-through test point that connects in series between the DLC and the scan tool.
C) A parallel test point that connects the DLC and the scan tool.
D) an alternative to a scan tool.

Question 37

The __________ network has all of the modules connected to a central point.

A) linear
B) stub
C) star (or hub)
D) ring

Question 38

A Controller Area Network (CAN) bus circuit consists of a pair of ____.

A) biases
B) modules
C) nodes
D) twisted wires

Question 39

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.

A) dedicated circuits
B) intermodules
C) BOB
D) actuators

Question 40

A(n) ____ is a language computers use to communicate with one another over the data bus.

A) protocol
B) interface
C) synchronicity
D) program

Question 41

In the Media Oriented System Transport (MOST) data bus system, what changes light signals into voltage that is then transmitted to the MOST transceivers?

Question 42

The data transmission of the PCI bus is being discussed. Technician A says the Header detects if the message has been corrupted or if there are any other errors. Technician B says the cyclic redundancy check (CRC) is one to three bytes of information concerning the type, length, priority, target module, and sending module. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 43

How can an open circuit fault with either the CAN B (+) or the  CAN B (−) circuit be located?

Question 44

Diagnosing the LIN bus is being discussed. Technician A says if 0 volt is indicated by the voltmeter or lab scope when the slave module is disconnected, the cause could be a faulty master module. Technician B says this can be caused by an open circuit between the master and slave module connector. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 45

What system provides the ability to use a single circuit to distribute and share data between several control modules?

Question 46

Repairs to the data bus networks are being discussed. Technician A says to crimp the wires then cover with heat shrink tube. Technician B says any new wires added must be the same length as that removed. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 47

What is the purpose of the vehicle module scan report?

Question 48

What organization has defined different classes of protocols according to their baud rate?

Question 49

What protocol is the class B standard for OBD II?

Question 50

What is a central gateway (CGW) module?

Question 51

What is each computer that is connected to the data bus is called?

Question 52

Describe the operation and common usage of the Media-Oriented System Transport (MOST) data bus system.

Question 53

What module is used where all three CAN bus networks connect together?

Question 54

Technician A says normal voltages on the LIN bus is up to 12 volts, which is pulled low during communications. Technician B says in the LIN bus, if a slave module is disconnected from the master module and the ignition switch is in the RUN position, the reading will be about 9.5 volts. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 55

What is Multiplexing (MUX)?

Question 56

What does the acronym MUX stand for?

Question 57

The LIN bus voltage reads normal with the slave module disconnected, but then reads 0 volt when it is reconnected. What can be the cause?

A) The slave module has an internal short to ground.
B) The circuit between the master and slave modules is open.
C) The circuit between the master and the slave module is shorted to ground.
D) The master module is faulty.

Question 58

What type of technology allows several modules from different manufacturers to be connected using a standardized radio transmission?

Question 59

What is the local interconnect network (LIN) bus?

Question 60

The Society of Automotive Engineers (SAE) has defined different classes of protocols. What are the classes based on?

Question 61

Completion question _______________.