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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Trouble Code Memory Loss


To Check for a loss of trouble code memory ground the dwell lead for at least 10 seconds with the "test" lead left ungrounded.
- A code 23 should be stored after the engine is stopped and the ignition is turned to "run".
- If this is not achieved the ECM is faulty.