Throttle Full Close Switch: Description and Operation

Throttle Position Sensor/Idle (IDL) Switch Assembly:

PURPOSE
The Idle (IDL) switch detects idle position when the throttle plate is closed.

LOCATION
Integrated in the throttle position sensor assembly.

OPERATION
The IDL switch signal is used by the PCM to control the following:
- Fuel injection
- Ignition timing
- Fuel pump
- Idle speed