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 sensor. If this sensor opens, transmission will not shift into overdrive, or will downshift if already in overdrive. For additional information, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.