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: Testing and Inspection

Idle Switch Testing:






1. Disconnect idle switch vacuum hose and electrical connector.

2. With an ohmmeter, ensure that there is no continuity between switch connector positive and negative terminals.

3. With a hand vacuum pump, apply the specified vacuum and check that there is now continuity between the switch terminals.

4. Replace the switch if it fails these tests.