Transmission Range (TR) Sensor Assembly
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 are 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, line pressure control, shift scheduling and TCC operation.