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)

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System Diagram



Engine Controls Schematics

Module Power, Ground, Serial Data, and MIL

Engine Controls Diagram 1:






5-Volt and Low Reference

Engine Controls Diagram 2:






Pressure and Temperature Sensors

Engine Controls Diagram 3:






MAF, VSS

Engine Controls Diagram 4:






Oxygen Sensors

Engine Controls Diagram 5:






Electronic Throttle Controls

Engine Controls Diagram 6:






Ignition Controls

Engine Controls Diagram 7:






Fuel Pump Controls

Engine Controls Diagram 8:






Fuel Injectors

Engine Controls Diagram 9:






EVAP, EGR, and FTP Controls

Engine Controls Diagram 10:






AIR Controls - NU6

Engine Controls Diagram 11:






Controlled/Monitored Subsystem References






A/T Control References

Engine Controls Diagram 13: