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, and Low Reference Bus (1 of 3)






5V2, 5V3, 5V4, and Low Reference Bus (2 of 3)






Low Reference Bus (3 of 3)






Engine Data Sensors- Temperature, AI and MAF






Engine Data Sensors- Pressure and WIF






Engine Data Sensors- EGR and Turbocharger Controls






Engine Data Sensors- Pedal Position and Injector Timing






Engine Data Sensors- Glow Plug Controls and Intake Air Heater






Engine Data Sensors- Nitrogen Oxides and Reductant Sensor Module






Fuel Controls- Fuel Pump, Temperature and Pressure Controls






Fuel Controls- Fuel Injectors






Emissions Controls- Reductant System






Controlled/Monitored Subsystem References