In an electronic power steering system, PCM stands for: a. Powertrain control module. b. Portable control mechanism. c. Power cutting mechanism. d. Power control module.

The correct answer is a. Powertrain control module.<br /><br />In an electronic power steering system, PCM stands for Powertrain Control Module. The Powertrain Control Module is an electronic control unit that manages various functions related to the powertrain, including the engine, transmission, and steering system. It plays a crucial role in controlling the power steering system by adjusting the level of assistance provided based on factors such as vehicle speed, steering input, and engine load.