B Series Truck 4WD L4-2606cc 2.6L SOHC (1992)
Throttle Full Close Switch: Description and Operation
Idle Speed Control System
The Idle Switch is an "ON/OFF" switch that signals the ECU whether the throttle is completely closed or not. The ECU utilizes this input in its
calculations of:
^ Fuel injection quantity
^ ISC valve position
^ Purge control solenoid valve operation
^ Pressure regulator solenoid valve operation
^ Ignition timing control (igniter)
