Normal Operation
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The overdrive (O/D) off function is controlled by the O/D off switch located on the shifter assembly. The O/D off status is transmitted to the instrument cluster from the powertrain control module (PCM) over the communication network.