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

Powertrain Management



Engine Controls Schematics

Power, Ground, MIL, Communication






5-Volt and Low Reference Bussing






Engine Data Sensors - Pressure, Temperature






Engine Data Sensors - CKP, CMP, KS and Turbo Solenoids






Engine Data Sensors - HO2S






Engine Data Sensors - APP, Throttle Body






Ignition Controls






Fuel Delivery






Engine Data Sensors - EVAP, Fuel Tank Pressure (FTP) Sensor






Controlled/Monitored Subsystems References