Question

in the engine management system, which of the following create input signals to the pcm?

a. sensors
b. relays
c. control modules
d. solenoids

Explanation:

In an engine management system, sensors are devices that detect various physical quantities (such as temperature, pressure, speed) and convert them into electrical signals. These electrical signals serve as input to the Powertrain Control Module (PCM). Relays are used for switching electrical circuits on or off based on control signals. Control modules (like PCM itself) process signals rather than being a primary source of input signals to the PCM. Solenoids are actuators that move mechanical parts based on electrical current and are output - related components in the engine management system.

Answer:

A. Sensors