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

Electrical Diagrams




Engine Controls Schematics

Power, Ground, Serial Data, and MIL






5V and Low Reference Bus (1 of 2)






5V and Low Reference Bus (2 of 2)






Engine Data Sensors - Pressure and Temperature






Engine Data Sensors - Oxygen Sensors






Engine Data Sensors - Throttle Controls






Camshaft, Crankshaft, and Knock Sensors, Camshaft Actuators






Fuel Controls - Fuel Injectors and Ignition Controls






Fuel Controls - Fuel Pump Controls






Fuel Controls - Evaporative Emission and Device Controls






Controlled/Monitored Subsystem References