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

Operation Summary

^ If the Passive tests pass the Active Test will not run and no DTCs will set.
^ If either of the Passive tests are inconclusive the Active Test will run and must fail 3 times for a DTC to set.
^ If either of the Passive tests fail then the Active Test will run and must fail 2 times for a DTC to set.
^ If either of the Passive Tests conditions are exceeded (Passive Tests By Pass) the Active Test will run and must fail 3 times for a DTC to set.