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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Transmission Position Sensor/Switch: Description and Operation

PURPOSE/OPERATION
The transmission range switch detects whether the transmission is in park or neutral. The engine control module monitors the transaxle range to maintain engine idle. Based on this signal the engine control module determines the automatic transaxle load and drives the ISC motor to maintain optimum idle speed.