Transmission Overdrive Override (OD/OR) Switch (A/T Models)

On models with Overdrive (OD), PCM regulates 3-4 OD upshift and downshift through OD solenoid. Transmission OD/OR switch is mounted in instrument panel.

OD/OR switch is normally closed. If OD/OR switch is depressed and it opens, transmission will not enter OD. Transmission will downshift if it is in OD and OD/OR switch is depressed.

OD/OR switch circuit includes a transmission fluid temperature thermistor. If this thermistor opens, transmission will not shift into overdrive, or will downshift if already in overdrive.