Grand AM L4-138 2.3L VIN A MFI (1992)
Transmission Position Switch/Sensor: Description and Operation
Park/Neutral (P/N) Switch
Park/Neutral Switch (Auto. Trans)
PURPOSE
The PARK/NEUTRAL (P/N) switch indicates to the computer when the transmission is in PARK or NEUTRAL. This information is used by the
ECM/PCM for Idle Air Control (IAC) operation and transmission Torque Converter Clutch (TCC) operation.
OPERATION
The P/N switch contact are a part of the neutral switch and are closed to ground in park or neutral and open in drive ranges and reverse. The
ECM/PCM supplies ignition voltage through a current limiting resistor to the switch and senses a closed circuit when voltage drops to less than 1
volt.
NOTE: DO NOT drive the vehicle with the PARK/NEUTRAL switch disconnected, since idle quality may be affected.
LOCATION
Top of transaxle.