Why should a DSO be used in diagnosing a vehicle's multiplexing bus?
A) To pull diagnostic trouble codes (DTCs) from the computers on the bus
B) To look at fuel trim information
C) To check monitor readiness status
D) To check for the presence of serial data (binary code) when a scan tool fails to communicate

Question

Quizplus · Accepted Answer

A Digital Storage Oscilloscope (DSO) is used in diagnosing a vehicle's multiplexing bus primarily to check for the presence of serial data (binary code), especially when a scan tool fails to communicate. This helps in identifying whether the communication lines are active and functioning correctly.

Why Should a DSO Be Used in Diagnosing a Vehicle's