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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Emission Control Systems: Tools and Equipment

Special Service Tool (SST)-Break Out Box (Used For Voltage Pin Tests):





Special Service Tool (SST) "Break Out Box" used for performing pin tests on Powertrain Control Module (PCM) circuits and related emission control components.