Tundra Access Cab LTD 2WD V8-4.7L (2UZ-FE) (2000)
Overdrive Indicator Lamp: Description and Operation
The O/D main switch contacts go open when the switch is pushed in and go closed when it is pushed out.
If O/D main switch is at OFF position, the O/D OFF indicator light lights up, and the ECM prohibits shifting O/D.