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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Diagnostic Circuit Check

Diagnostic Circuit Check:

CIRCUIT DESCRIPTION
The Diagnostic Circuit Check is an organized approach to identifying a problem created by a malfunction in the engine control system. It must be the starting point for any driveability complaint diagnosis, because it directs the service technician to the next logical step in diagnosing the complaint. Using the chart correctly will reduce diagnostic time and prevent the unnecessary replacement of good parts.