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