Question 1

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

Accepted Answer

Wireless networks do not require any wires to transmit information as they use radio waves or infrared signals instead.

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

Accepted Answer

Technician A is correct. The LIN bus is a single master, multi-slave module, low-speed network. Technician B is incorrect. The LIN bus was not developed to take the place of the CAN bus system but was designed to complement it by providing a lower cost alternative for less complex systems.

Question 3

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

Accepted Answer

CAN system can support baud rates up to 5 Mb/s.

Question 4

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

Accepted Answer

The ISO-K bus protocol does allow for bidirectional communication on a single wire, typically used in automotive and industrial applications.

Question 5

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

Accepted Answer

Bluetooth technology allows devices from different manufacturers to connect using a standard protocol, but it is not specifically for high definition transmission. It is primarily used for short-range wireless communication.

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

Accepted Answer

Technician A is correct that a scan tool is used to access the central gateway module for CAN bus diagnostics. However, Technician B is incorrect that if the scan tool can communicate with the central gateway module, then the CAN C circuit is at fault. There are multiple components and circuits involved in the CAN bus network, and a diagnosis should not be based solely on the ability to communicate with the central gateway module.

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

Accepted Answer

Both technicians are correct. The CAN bus uses a pair of twisted wires for its circuitry and for digital data to transfer, the voltage is simultaneously pulled high on one circuit and pulled low on the other.

Question 8

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

Accepted Answer

Multiplexing networks allow multiple devices to share signals on a common conductor by combining multiple data streams into a single signal for transmission over a shared medium.

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.

Accepted Answer

The answer of All of the following are facts about...

Question 10

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

Accepted Answer

The Controller Area Network (CAN) was actually developed before the Local Interconnect Network (LIN) bus system. CAN was designed to allow microcontrollers and devices to communicate with each other in applications without a host computer, originating in the automotive industry, while LIN was introduced later as a cost-effective, lower-speed alternative to CAN.

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

Accepted Answer

Technician A is correct because J1850 is indeed the class B standard for OBD II. Technician B is incorrect because J1850 does not have four different versions based on baud rate; it primarily has two versions: PWM (Pulse Width Modulation) and VPW (Variable Pulse Width).

Question 12

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

Accepted Answer

MOST is a fiber optic-based data bus system used in automobiles.

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

Accepted Answer

The answer of Technician A says wireless networks can connect...

Question 14

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

Accepted Answer

The statement is correct, the LIN bus is a UART single master, multiple slave, low-speed network.

Question 15

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

Accepted Answer

Multiplexing (MUX) wiring systems do use bus data links to 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

Accepted Answer

Technician A is correct that some modules do not set specific codes that isolate the type of fault. Technician B is also correct that if the fault code indicates both CAN B+ and CAN B- circuits are low or high, a total bus failure has occurred. Therefore, both technicians are correct.

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

Accepted Answer

Both technicians are correct. Verifying the customer's complaint is a standard first step in diagnostics to understand the issue. Determining which bus network is at fault is essential in CAN bus diagnostics due to the presence of multiple bus networks in modern vehicles.

Question 18

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

Accepted Answer

This statement is incorrect. There is no such term as "mole" in computer networking. Each computer connected to a data bus is commonly referred to as a "node" or a "device".

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

Accepted Answer

ISO 9141-2 is indeed used primarily for diagnostic purposes, aligning with Technician A's statement. It is also a Class B system with a baud rate of 10.4Kb/s, which supports Technician B's statement.

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

Accepted Answer

Technician A is correct that MOST modules use an LED, photodiode, and MOST transceiver for communication via light signals. Technician B is also correct that the MOST system uses fiber optics to transmit data at high speed. Therefore, both technicians are correct.

Quiz 10: Vehicle Communication Networksvehicle Multiplexing Diagnostics

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

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?

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

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

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

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?

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?

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

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

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

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?

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

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?

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

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

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?

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?

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

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?