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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Transaxle Mounted Neutral Start Switch (TMNSS)

Trans Range Switch Circuit:





Purpose:
The PARK/NEUTRAL switch indicates to the computer when the transmission is in PARK or NEUTRAL.

Operation:
This information is used by the computer for Timing, Idle Air Control (IAC), Torque Converter Clutch (TCC) and canister purge operation. DO NOT drive the vehicle with the PARK/NEUTRAL switch disconnected, since idle quality may be affected.

Location:
The Transaxle Mounted Neutral Start Switch is mounted to the transaxle.