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Home >> GMC >> 2004 >> Sierra 2500, 2D Pickup, LQ4/KL8, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.0L - Alternative Fuels (Introduction) >> Description and Operation >> Fuel Injector Control Module Description >> Communication Circuits >> FICM Diagnostic Circuit

FICM Diagnostic Circuit

The PCM monitors the FICM diagnostic circuit in order to set FICM related DTCs. The FICM diagnostic circuit is a 5-volt circuit that is pulse width modulated by the FICM in order to communicate diagnostic information to the PCM.

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