What does TCU mean in a car?
1 Answers
TCU in a car refers to the Transmission Control Unit. When this indicator light is on, it indicates a fault in this module. Here is some relevant information about TCU: Function: The Transmission Control Module helps the transmission decide when and how to shift gears by collecting information from various sensors and the Engine Control Module, thereby improving vehicle performance, ensuring smooth gear shifts, and saving fuel. Working Principle: The Malfunction Indicator Lamp (MIL), also known as the Check Engine Light, illuminates a yellow or red engine symbol on the dashboard when the control module detects a fault. This fault code indicates that the Powertrain Control Module (ECU) has received a request from the Transmission Control System (TCU) to illuminate the malfunction indicator lamp.