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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Throttle Full Close Switch: Description and Operation

The Idle Position Switch is a contact type switch and is installed at the tip of the Idle Speed Control (ISC) Servo. The switch indicates accelerator operation by opening a set of contacts when the throttle lever is moved from the idle position. When the driver releases the accelerator pedal, the throttle lever rests on a push-pin at the end of the ISC and the contacts are closed.