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

ECM Power, Ground, MIL, and Serial Data

Engine Controls Diagram 1:






5-Volt and Low Reference Bussing

Engine Controls Diagram 2:






MAF/IAT, MAP, and ECT Sensors

Engine Controls Diagram 3:






Heated Oxygen Sensors

Engine Controls Diagram 4:






Electronic Throttle Controls

Engine Controls Diagram 5:






Fuel Injectors and Fuel Pump Controls

Engine Controls Diagram 6:






EVAP Solenoids and FTP Sensor

Engine Controls Diagram 7:






Ignition Control Module

Engine Controls Diagram 8:






Camshaft, Crankshaft, Knock Sensors, and Camshaft Position Actuator Solenoid

Engine Controls Diagram 9:






Secondary Air Injection - NU3

Engine Controls Diagram 10:






Controlled/Monitored Subsystem References

Engine Controls Diagram 11: