DeVille V8-4.6L VIN Y (1998)
Transmission Position Switch/Sensor: Description and Operation
Transaxle Pressure Switch
DESCRIPTION
The transaxle pressure switch is located inside of the transaxle and it composed of five discrete pressure switches that are combined to provide three
status indications to the PCM.
OPERATION
The PCM then uses these three inputs in a digital format (001, 010, 011, etc.) to determine the six possible transaxle ranges.
The PCM uses the transaxle pressure switch status for idle speed control, transaxle shift control and ignition control. A faulty transaxle pressure switch
will cause various transaxle and engine driveability conditions and should set a DTC.
