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) Inputs

The Engine Controller (ECM) located in the Powertrain Control Module (PCM) shares two signals with the transaxle controller TCM. These two signals are the vehicle speed signal (received from the vehicle speed sensor), and an ignition voltage signal.

The vehicle speed signal is used by the transaxle control module to determine vehicle speed for transaxle shifting.

The ignition voltage signal is the turn On signal for the transaxle control module.