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Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1136 (Engine Controls - 6.0L - Alternative Fuels (Introduction)) >> Description and Operation >> Fuel Injector Control Module Description >> Communication Circuits >> FICM Diagnostic Circuit

FICM Diagnostic Circuit

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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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