Transmission Position Sensor/Switch: Description and Operation

Inhibitor Switch:

The Inhibitor Switch (also referred to as neutral safety switch) signals the ECU as to transmission operating range and prevents starting the vehicle except in "P" or "N" positions.

The ECU utilizes the transmission operating range input from the inhibitor switch in its control calculations for these outputs:

^ Fuel injection quantity
^ Idle speed control
^ Purge solenoid valve
^ A/C cut-off
^ Ignition timing control (igniter)