If a voltmeter is connected between J1939 CAN-low (positive test lead) and ground (negative test lead), what is the lowest measurement you would read if the data bus is functioning properly?
A) 0 volts
B) 1 volt
C) 3 volts
D) 5 volts

Question

Quizplus · Accepted Answer

The J1939 CAN (Controller Area Network) bus system operates with a voltage differential, where the CAN-low line typically varies around 2.5 volts when idle and can go as low as approximately 1.5 volts when transmitting data. Therefore, the lowest measurement one would expect to read when the data bus is functioning properly and the voltmeter is connected between CAN-low and ground would be around 1 volt, considering the potential drop from its idle state.

If a Voltmeter Is Connected Between J1939 CAN-Low (Positive Test