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
If it fails: lemon-manuals.org.ua

Or, hide this message: temporarily or permanently

System Diagram




Engine Controls Schematics

Module Power, Ground, Serial Data, and MIL






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






5V2, 5V3, 5V4, and Low Reference Bus (2 of 2)






Engine Data Sensors - Pressure and Temperature






Engine Data Sensors - Oxygen Sensors






Engine Data Sensors - Throttle Controls






Ignition Controls - Ignition System






Ignition Controls - Camshaft, Crankshaft, and Knock Sensors, Camshaft Actuators






Fuel Controls - Fuel Injectors, Fuel Composition, and High Pressure Controls






Fuel Controls - Fuel Pump Controls






Fuel Controls - Evaporative Emissions and Turbocharger Controls






Controlled/Monitored Subsystem References