Deck 49: Can and Network Communications

Question 1

A data line has been diagnosed as being shorted to ground. Which of these would be the next step in diagnosing this problem?

A)Unplug modules one at a time and re-test the data line
B)Disconnect the battery and then test the data line
C)Replace the alternator
D)Replace the BCM

Answer 1

Unplug modules one at a time and re-test the data line

Question 2

A data bus is being checked for voltage activity. Both the DMM and the oscilloscope show a constant zero volts with the key on or off. This indicates ________.

A)Normal activity
B)A sleeping module
C)The data line is shorted to ground
D)None of these

Answer 2

The data line is shorted to ground

Question 3

Low-speed networks operate at less than ________ bits per second.

A)2,000
B)5,000
C)8,000
D)10,000

Answer 3

10,000

Question 4

UART uses a signal that toggles between 0 volts and ________.

A)5 volts
B)8 volts
C)7 volts
D)12 volts