Transmission Control Switch (TCS)
The transmission control switch (TCS):
- seats in the end of the gearshift lever.
- A cover retains the TCS to the gearshift lever.
- is a momentary contact switch.
- commands the powertrain control module (PCM) to disengage or engage the overdrive function of the transmission.
- When overdrive (D) is disengaged, the message O/D OFF will illuminate on the instrument panel.