Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Throttle Full Close Switch: Description and Operation



The Idle Switch is an integral part of the throttle sensor. It is an "ON/OFF" switch which informs the ECU whether the throttle is completely closed or not. This input is utilized by the ECU in its calculations for these outputs:

Fuel injection quantity and timing
Idle speed
Igniter
Purge control
EGR control