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

System Diagram



Engine Controls Schematics

Module Power, Ground, and Serial Data






5V1 and 5V2 and Low Reference Bus (1 of 2)






5V3 and 5V4 and Low Reference Bus (2 of 2)






Engine Data Sensors - Pressure, Temperature and Throttle Controls






Engine Data Sensors - Pressure and Oxygen Sensors






Ignition Controls - Ignition Coils






Ignition Controls - Inputs, Camshaft and Turbocharger Controls






Fuel Controls - Fuel Injectors, Inputs, and High Pressure Control






Fuel Controls - Fuel Pump and Controls






Emission Controls - EVAP Controls






Subsystem References