Question

A/an_is used to check for variable voltage output from an ignition sensor or computer.

Answer 1

A voltmeter is used to check for variable voltage output from an ignition sensor or computer.

Answer 2

Voltmeter

Step-by-step explanation:

A voltmeter is an instrument that measures the difference in electrical potential between two points in an electric circuit.

Voltmeter checks for variable voltage output from an ignition sensor or computer device when connected in parallel to that device. This is required because objects in parallel experience the same potential difference.