Overdrive OFF Switch
WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Overdrive OFF (O/D OFF) switch (momentary type) delivers an input signal to PCM to indicate if overdrive is selected by operator. Switch is located on gearshift lever handle. O/D OFF switch is canceled when ignition switch is turned off.