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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1325 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B1140 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

The inflatable restraint side impact sensor (SIS) is a crash sensing device used in the detection of a side impact collision. The SIS is used to monitor vehicle velocity changes to detect side impact crashes that are severe enough to warrant deployment of the inflatable restraint side impact module. The SIS receives power and ground from the inflatable restraint sensing and diagnostic module (SDM). The SIS communicates the status of the side impact air bag system to the SDM via a diagnostic line. If the SDM detects a malfunction within the SIS circuit, a DTC will be set.

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