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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Transmission Position Sensor/Switch: Testing and Inspection

The Tech 1 should display "P-N" when in park or neutral and "-R-DL" when in drive or reverse. Refer to System Diagnosis / Chart C-1D Manifold Absolute Pressure (MAP) Output Check. Chart C-1A Park/Neutral Switch Diagnosis