Section 07-14A: Transmission Range (TR) Sensor | 1996 F-Series and Bronco Equipped with E4OD and 4R70W Transmissions Workshop Manual |
The transmission range (TR) sensor is transmission-mounted.
The powertrain control module (PCM) (12A650) monitors the voltage across a series of step-down resistors that correspond to the position of the manual control lever (7A256). The PCM uses this information in determining desired gear and EPC pressure.
The TR sensor permits the engine to start only in the PARK and NEUTRAL positions and activates the backup lamps in the REVERSE position. The sensor also contains neutral sense circuitry for 4x4 applications.