CHAPTER 49
QUESTIONS AND ANSWERS
A high-speed CAN BUS communicates with a scan tool through which terminal (s)? - ans-
sd sd sd sd sd sd sd sd sd sd sd sd sd sdsd
6 and 14
sd sd
UART uses a ________ signal that toggles OV. - ans-5 volts
sd sd sd sd sd sd sd sd sdsd sd
Which terminal of the OBD-II data link connector is the chassis ground for all vehicles? -
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ans-4
sdsd
Technician A says Chrysler OBD-I (1981— sd sd sd sd sd
1995) vehicles were equipped with a BUS system called Serial Communications Interface (
sd sd sd sd sd sd sd sd sd sd sd sd
SCI). Technician B says The Chrysler Programmable Controller Interface (PCI) is a three-
sd sd sd sd sd sd sd sd sd sd sd sd
wire communication protocol that connects at the OBD-
sd sd sd sd sd sd sd
II DLC at terminal 2. Which technician is correct? - ans-A only
sd sd sd sd sd sd sd sd sd sdsd sd
The UART data BUS operates at a baud rate of ________ bps. - ans-8192
sd sd sd sd sd sd sd sd sd sd sd sd sdsd
Technician A says a break- sd sd sd sd
out box (BOB) used to access the BUS terminals while using a scan tool to activate the mod
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ules Technician B says a typical 38-
sd sd sd sd sd sd
cavity diagnostic connector as found on many BMW and Mercedes vehicles under the hoo
sd sd sd sd sd sd sd sd sd sd sd sd sd
d. Which technician is correct? - ans-Both A and B
sd sd sd sd sd sdsd sd sd sd
Which of these is commonly designated D2B, is an optical BUS system connecting audio, v
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ideo, computer and telephone components in a single-
sd sd sd sd sd sd sd
ring structure with a speed of up to 5,600,000 bps: - ans-Domestic Digital BUS
sd sd sd sd sd sd sd sd sd sd sdsd sd sd
GM Class 2 communication toggles between ________ and ________ volts. - ans-0; 7
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Which terminal of the data link connector does General Motors use for Class 2 communicat
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ion? - ans-2 sd sdsd
Low-speed networks operate at less than ________ bits per second. - ans-10,000 sd sd sd sd sd sd sd sd sd sd sdsd
A module is also known as a ________. - ans-Node
sd sd sd sd sd sd sd sd sdsd
Technician A says module communications networks are used to reduce the number of wir
sd sd sd sd sd sd sd sd sd sd sd sd sd
es in a vehicle. Technician B says a communications network is used to share data from se
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
nsors, which can be used by many different modules. Which technician is correct? - ans-
sd sd sd sd sd sd sd sd sd sd sd sd sd sdsd
Both A and B sd sd sd
QUESTIONS AND ANSWERS
A high-speed CAN BUS communicates with a scan tool through which terminal (s)? - ans-
sd sd sd sd sd sd sd sd sd sd sd sd sd sdsd
6 and 14
sd sd
UART uses a ________ signal that toggles OV. - ans-5 volts
sd sd sd sd sd sd sd sd sdsd sd
Which terminal of the OBD-II data link connector is the chassis ground for all vehicles? -
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ans-4
sdsd
Technician A says Chrysler OBD-I (1981— sd sd sd sd sd
1995) vehicles were equipped with a BUS system called Serial Communications Interface (
sd sd sd sd sd sd sd sd sd sd sd sd
SCI). Technician B says The Chrysler Programmable Controller Interface (PCI) is a three-
sd sd sd sd sd sd sd sd sd sd sd sd
wire communication protocol that connects at the OBD-
sd sd sd sd sd sd sd
II DLC at terminal 2. Which technician is correct? - ans-A only
sd sd sd sd sd sd sd sd sd sdsd sd
The UART data BUS operates at a baud rate of ________ bps. - ans-8192
sd sd sd sd sd sd sd sd sd sd sd sd sdsd
Technician A says a break- sd sd sd sd
out box (BOB) used to access the BUS terminals while using a scan tool to activate the mod
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ules Technician B says a typical 38-
sd sd sd sd sd sd
cavity diagnostic connector as found on many BMW and Mercedes vehicles under the hoo
sd sd sd sd sd sd sd sd sd sd sd sd sd
d. Which technician is correct? - ans-Both A and B
sd sd sd sd sd sdsd sd sd sd
Which of these is commonly designated D2B, is an optical BUS system connecting audio, v
sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ideo, computer and telephone components in a single-
sd sd sd sd sd sd sd
ring structure with a speed of up to 5,600,000 bps: - ans-Domestic Digital BUS
sd sd sd sd sd sd sd sd sd sd sdsd sd sd
GM Class 2 communication toggles between ________ and ________ volts. - ans-0; 7
sd sd sd sd sd sd sd sd sd sd sdsd sd
Which terminal of the data link connector does General Motors use for Class 2 communicat
sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ion? - ans-2 sd sdsd
Low-speed networks operate at less than ________ bits per second. - ans-10,000 sd sd sd sd sd sd sd sd sd sd sdsd
A module is also known as a ________. - ans-Node
sd sd sd sd sd sd sd sd sdsd
Technician A says module communications networks are used to reduce the number of wir
sd sd sd sd sd sd sd sd sd sd sd sd sd
es in a vehicle. Technician B says a communications network is used to share data from se
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
nsors, which can be used by many different modules. Which technician is correct? - ans-
sd sd sd sd sd sd sd sd sd sd sd sd sd sdsd
Both A and B sd sd sd
