Leganza CDX L4-2.2L DOHC D-TEC MFI (1999)
Transmission Position Switch/Sensor: Description and Operation
Park/Neutral Position Switch
Circuit Description
The park/neutral position (PNP) switch contacts are a part of the selector position switch. The contacts are closed to ground in park and neutral and open
in the drive ranges.
The engine control module (ECM) supplies ignition voltage through a current limiting resistor to the signal wire and senses a closed switch when the
voltage on the signal wire drops to less than 1 volt. The ECM uses the PNP signal as one of the inputs to control idle air and spark timing.
