When diagnosing a data bus with a communication failure on all modules, voltage fluctuations exceeding 5 volts DC indicate what condition?
A) Partially open grounds.
B) Stray voltage spikes generated by acidic engine coolant .
C) Electromagnetic or radio frequency interference.
D) Defective V-ref circuit.

Question

Quizplus · Accepted Answer

Electromagnetic or radio frequency interference can cause voltage fluctuations exceeding 5 volts DC on a data bus with communication failure on all modules.

When Diagnosing a Data Bus with a Communication Failure on All