What is being tested when measuring voltage levels in vehicle module communications?

Measuring voltage levels in vehicle module communications primarily tests the signal integrity of the communication system. Signal integrity refers to how accurately and reliably a signal transmits over a communication medium without corruption or distortion.

In vehicle networks, such as Controller Area Network (CAN) or Local Area Network (LAN), proper voltage levels are essential for the correct interpretation of data being transmitted between modules. If the voltage levels are outside the expected range, it may indicate that there is either an issue with the module sending the signal, interference affecting the signal, or even a faulty connection. Maintaining signal integrity ensures that data is communicated clearly and efficiently, which is crucial for the vehicle's various systems to operate harmoniously.

The incorrect options focus on other aspects of electrical measurements. Current detection would involve measuring the flow of electricity rather than the quality of the signal itself. Power consumption relates to the total energy used by the vehicle modules, which is separate from the integrity of the communication signal. Sensitivity to noise generally refers to how outside electrical interference affects signal transmission, rather than assessing the voltage directly.