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)

Or, hide this message: temporarily or permanently

Neutral Switch (M/T)


^ These are "ON/OFF" switches located on the transmission.
^ The neutral switch signals the ECU that the gear selector is either in neutral or any other position.
^ The clutch switch is operated by the clutch pedal inside the vehicle and informs the ECU that the clutch is either engaged or disengaged.
^ These inputs are used by the ECU in calculations for these outputs:

^ Fuel injection quantity
^ Idle speed control valve
^ Purge control solenoid valve