Transmission Position Sensor/Switch: Description and Operation

INHIBITOR SWITCH
- The inhibitor switch assures safety when starting the engine. this switch is mounted on the right side of the transmission case, and is operated by the range selector lever.
- When the selector lever is set to "P" or "N",the electrical circuit is connected in the inhibitor switch and the starter circuit is energized for cranking the engine.
- When the selector lever is set to "R", "D","3" "2", or "1" range, the electrical circuit is disconnected in the inhibitor switch. hence engine cranking is disabled. In the "R" range, the backup light circuit is completed in the switch, and the backup lights come on.
- In addition to the above function, the inhibitor switch incorporates a circuit for detecting the selected range position and sending the range signal to the Transmission Control Module (TCM).