Overdrive Switch: Description and Operation

Overdrive Spring Loaded Button

The overdrive function (preventing the transaxle from shifting into fourth gear) can be switched OFF using the spring loaded button on the selector lever knob.
The corresponding indicator lamp in the instrument panel lights up showing that the overdrive function is switched OFF.
To activate overdrive function, press the button again and the lamp will go out.

Transmission Control Switch (TCS)

The Transmission Control Switch (TCS) is a momentary contact switch.
When the TCS switch is pressed, a signal is sent to the Powertrain Control Module (PCM).
The PCM then energizes the Transmission Control Indicator Lamp (TCIL) and engages or disengages fourth gear operation and provides coast braking in second and third.

Transmission Control Indicator Lamp (TCIL)

The TCIL is located in the instrument panel and is labeled O/D OFF.
The Transmission Control Switch (TCS) controls the ON/OFF operation of the TCIL.
When the driver initially presses the button of the TCS, the Transmission Control Indicator Lamp (TCIL) turns ON to indicate that transaxle operation in fourth gear is disabled.
When the driver presses the TCS again, the TCIL turns OFF.