Throttle Full Close Switch: Description and Operation

AIR CONDITIONER SWITCH
When the A/C is turned on, the ECU monitors the signal from the compressor clutch. The ECU uses this signal for controlling idle speed during A/C operation. The A/C switch inputs the ECU through terminal A/C.

BRAKE LIGHT SWITCH
The Brake Light Switch is used to detect when the vehicle is braking. This signal is sent to the ECU to reduce fuel delivery on deceleration. The signal inputs the ECU through terminal STP.


CENTER DIFFERENTIAL LOCK LIGHT INDICATOR SWITCH
This switch signals the ECU when the transfer case has been shifted into fourwheel drive operation. The ECU uses this information to override certain operating functions for improved low rpm/high torque off-road driving. The Center Difflock Light Indicator Switch inputs the ECU through terminal 4WD.


NEUTRAL START SWITCH
This switch is installed on A/T models to inform the ECU of transmission gear selection. This information is used by the ECU to control starter operation and engine idle operation. The signal inputs the ECU through terminal NSW.


TPS (IDL) SWITCH
The ECU senses whether the throttle valve is open or closed by a switch in the Throttle Position Sensor (TPS). The ECU uses this information to control fuel delivery at idle and on deceleration. This signal inputs the ECU through terminal IDL.