Celica L4-1.8L (1ZZ-FE) (2004)
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Overdrive Indicator Lamp: Testing and Inspection
O/D MAIN SWITCH & O/D OFF INDICTOR LIGHT CIRCUIT
CIRCUIT DESCRIPTION
The O/D main switch is a momentary type switch. When pressing the O/D 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 ignition switch off will reset the
O/D OFF indicator light.
Wiring Diagram
