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

Quizplus · 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.

Controller Area Network CAN B Bus Diagnostics Is Being Discussed