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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 453 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> DTC B1141: Driver-Side Sis Malfunction >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Side Impact Sensor (SIS) is an impact sensing device used to detect side impacts. SIS monitors vehicle velocity changes to detect side impacts severe enough to warrant deployment of side impact air bag module. SIS receives power and ground from Sensing and Diagnostic Module (SDM). SIS communicates status of side impact air bag module system to SDM via a diagnostic line. If SDM detects a malfunction, DTC will be set.

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