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)

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On-Vehicle inspection





- Disconnect the vacuum hose from the throttle opener.
- Apply vacuum to the throttle opener.
- Disconnect the sensor connector.
- Insert a feeler gauge between the throttle stop screw and stop lever.








- Using an ohmmeter, measure the resistance between each terminal.
- Reconnect the throttle position sensor connector.
- Reconnect the throttle opener vacuum hose to the throttle body.