Tacoma PreRunner L4-2.7L (3RZ-FE) (2004)
Overdrive Indicator Lamp: Testing and Inspection
O/D Main Switch & O/D OFF Indicator Light Circuit
CIRCUIT DESCRIPTION
The O/D main switch is a momentary type switch. When pressing the O/D OFF main switch, the O/D OFF indicator light lights up and ECM prohibits
shifting to O/D, and when pressing it again, the O/D OFF indicator light goes off and ECM allows shifting to O/D. Turning the IG switch OFF will reset
the O/D OFF indicator light.
Wiring Diagram