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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Fuel Cutoff Signal

The Fuel Cutoff Signal parameter indicates when the PCM is operating the fuel injector in the fuel cutoff mode (the output to the fuel injector is stopped). When the fuel cutoff mode is active the Fuel Cutoff Signal parameter should read ON. The Fuel Cutoff Signal parameter should read OFF during all other fuel modes.