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







Engine Data Sensors - 5-Volt and Low Reference







Engine Data Sensors - Pressure and Temperature Controls







Engine Data Sensors - Heated Oxygen Sensors (1 of 2)







Engine Data Sensors - Heated Oxygen Sensors (2 of 2)







Engine Data Sensors - Throttle Controls







Ignition Controls - Ignition System Coils 1, 3, 5, and 7







Ignition Controls - Ignition System Coils 2, 4, 6, and 8







Ignition Controls - CKP, CMP and Knock Sensors







Fuel Controls - Fuel Pump Controls (RPO L96 Only)







Fuel Controls - Fuel Injectors







Fuel Controls - EVAP Controls







Controlled/Monitored Subsystem References







NOTE: VIN G, RPO L96, Flexible Fuel, Gas/ALC, 8 Cylinder, 6.0L SFI, Iron, GM