Throttle Full Open Switch: Description and Operation

Throttle Switch Location:

MANUAL TRANSMISSION ONLY

The throttle switch, which is mounted on the throttle valve housing, provides information to the CIS-E Motronic control unit concerning throttle valve position.
When the switch is in the closed position (throttle valve closed) a ground circuit is completed to the CIS-E Motronic control unit and an idle condition is recognized. As the throttle valve is opened slightly the circuit is interrupted and a non idle condition is recognized by the CIS-E control unit. This information is used by the control unit to calculate the appropriate values for the operations of idle stabilization, deceleration fuel shut-off, and activation of special ignition timing maps. A full throttle switch is no longer necessary.