G 20 Van V8-393 6.5L DSL VIN Y (1995)
Transmission Temperature Sensor/Switch: Description and Operation
Trans Range Pressure Switch Assembly
DESCRIPTION
The Transmission Fluid Temperature (TFT) sensor is a thermistor (a device that changes resistance according to changes in temperature) used to
indicate transmission fluid temperature. High sensor resistance produces high signal input voltage which corresponds to low fluid temperature.
Low sensor resistance produces low signal input voltage which corresponds to high fluid temperature. The Transmission Control Module (TCM)
uses the TFT sensor signal input to determine the following:
-
Torque Converter Clutch (TCC) apply and release schedules.
-
Hot mode determination.
-
Shift quality.
The TFT sensor is part of the internal wiring harness within the transmission.
