Transmission Position Sensor/Switch: Description and Operation

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.