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

Clutch Switch: Description and Operation



The Electronic Control Assembly (ECA) sends out a 5 volt reference to the clutch engage switch. When the switch is OPEN (clutch DEPRESSED), the ECA senses this voltage. When the switch is CLOSED (clutch RELEASED), the ECA senses no voltage. The ECA uses this input to determine engine load and to adjust idle speed accordingly.