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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 118 (Engine Controls And Fuel - 3.6L (LF4 LGX) - DTC P0685 LGX To DTC P3436 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2618 or P2619: Crankshaft Position Signal >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The engine control module (ECM) has a dedicated crankshaft position sensor signal circuit to the audio amplifier which controls the active noise cancellation feature. This output is used for active noise cancellation control based on engine speed.

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