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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1919 (Seat Belt System) >> Diagnostic Information and Procedures >> Seat Belt Indicator Circuit Malfunction - Passenger >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The inflatable restraint sensing and diagnostic module (SDM) sends the status of the passenger seat belt switch to the Passenger Air Bag ON/OFF indicator via a serial data communication message. The instrument panel cluster (IPC) controls the passenger seat belt indicator by using the serial data communication message from the SDM. If the seat belt is unfastened, only if an occupant is seated in the front passenger seat, the SDM will send a message to the IPC to illuminate the fasten safety belt indicator for 72 seconds or until the seat belt is fastened.

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