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

Module Power, Ground, Serial Data and MIL






5V1, 5V2 and Low Reference Bus






ECT, MAF/IAT, and MAP Sensors






Heated Oxygen Sensors






Electronic Throttle Controls






Fuel Injectors and Fuel Pump Controls






EVAP Solenoids and FTP Sensor






Ignition Control Module






Camshaft, Crankshaft, Knock Sensors, Camshaft Actuators






Secondary Air Injection (NU3)






Controlled/Monitored Subsystem References