Transmission Range (TR) Sensor Assembly
WARNING: This page is about a different car, the 2010 Mercury Milan and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The Transmission Range (TR) sensor assembly is an internally mounted sensor that includes the detent bracket and is located above the main control assembly. The components of the TR sensor are factory adjusted and is installed as a calibrated assembly. The TR sensor contains electronic circuitry that provides the PCM a fixed frequency duty cycle for each of the various positions of the manual lever (PARK, REVERSE, NEUTRAL, DRIVE and LOW to the PCM). The PCM uses the TR sensor signal for engine start, reverse lamps, LPC , shift scheduling and TCC operation.