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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Component Connector End Views

Engine Control Module (ECM) X1 (LU3)













Engine Control Module (ECM) X1 (LC8, LMF, L20, or L96)













Engine Control Module (ECM) X1 (LGH)













Engine Control Module (ECM) X2 (LU3)













Engine Control Module (ECM) X2 (LC8, LMF, L20, or L96)













Engine Control Module (ECM) X2 (LGH)









Engine Control Module (ECM) X3 (LGH)













Engine Coolant Level Switch (LGH)





Engine Coolant Temperature (ECT) Sensor (LGH)





Engine Coolant Temperature (ECT) Sensor (LC8, LMF, LU3, L20, or L96)





Engine Cooling Fan (LGH)





Engine Oil Level (EOL) Switch (LGH)





Engine Oil Pressure (EOP) Sensor (LGH)





Engine Oil Pressure (EOP) Sensor (LU3)





Engine Oil Pressure (EOP) Sensor (LC8, LMF, L20, or L96)





Evaporative Emission (EVAP) Canister Purge Solenoid Valve (LC8, LMF, LU3, L20, or L96)





Evaporative Emission (EVAP) Canister Vent Solenoid Valve (LC8, LMF, LU3, L20, or L96)





Exhaust Aftertreatment Fuel Injector (LGH)





Exhaust Gas Recirculation (EGR) Temperature Sensor 1 (LGH)





Exhaust Gas Recirculation (EGR) Temperature Sensor 2 (LGH)





Exhaust Gas Recirculation (EGR) Valve (LGH)





Exhaust Pressure Differential Sensor (LGH)





Exhaust Temperature Sensor 1 (LGH)





Exhaust Temperature Sensor 2 (LGH)





Exhaust Temperature Sensor 3 (LGH)





Exhaust Temperature Sensor 5 (LGH)