Sable V6-183 3.0L DOHC VIN S MFI (1997)
Transmission Position Switch/Sensor: Description and Operation
PURPOSE
The Powertrain Control Module (PCM) monitors the Transmission Range (TR) sensor inputs to determine the position of the manual shift lever. This
information is used in determining desired gear and electronic pressure control pressure. The TR sensor is mounted on the manual lever and also
houses other circuits such as the BACK-UP and START circuits.
CONSTRUCTION
The TR sensor is a ratiometric sensor with six discreet resistors in series. The sensor is decoded by looking at differential voltages produced in each of
the shift lever positions.
