Transmission Position Sensor/Switch: Description and Operation

PURPOSE / OPERATION
When the Ignition Switch is in the START position, the battery voltage is applied through the Ignition Switch and Transaxle Range Switch to the Engine Control Module. If the selector lever is not P or N position, the battery voltage will not reach the Engine Control Module. Also based on this signal, the Engine Control Module determines the automatic transaxle load and drives the Idle Speed Control Motor to maintain optimum idle speed.