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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Powertrain Control Module (PCM)

A Powertrain Control Module (PCM) is used to evaluate driving conditions by receiving information through various sensors throughout the vehicle. The PCM uses this information to determine upshifts and downshifts for optimum vehicle performance.