Transmission Mode Switch: Description and Operation

Engine Control Components

Transmission Control Switch (TCS)

The TCS signals the PCM with VPWR whenever the TCS is pressed. On vehicles with this feature, the transmission control indicator lamp (TCIL) illuminates when the TCS is cycled to disengage overdrive.

Typical Transmission Control Switch (TCS) (Column Shift):

Typical Transmission Control Switch (TCS)

Typical Transmission Control Switch (TCS) (Floor Shift):

Typical Transmission Control Switch (TCS)