Grand AM L4-138 2.3L DOHC VIN D MFI (1994)
Transmission Position Switch/Sensor: Description and Operation
Park/Neutral Switch (Auto. Trans)
PURPOSE
The PARK/NEUTRAL switch indicates to the computer when the transmission is in PARK or NEUTRAL. This information is used by the PCM for
Idle Air Control (IAC) operation and transmission Torque Converter Clutch (TCC) operation.
LOCATION
Top of transaxle.
OPERATION
The switch contacts are a part of the neutral switch and are closed to ground in park or neutral and open in drive ranges and reverse. The 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.
