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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 454 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> DTC B0083, B0084: Driver Or Passenger SPS Circuit Amperage Out Of Range >> Circuit Description

Circuit Description

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Seat Position Switch (SPS) is used to determine driver or front passenger seat position. SPS interfaces with Sensing and Diagnostic Module (SDM). State of SPS allows SDM to disable Stage 2 deployment of applicable air bag module. SPS is a Hall effect sensor mounted on seat tracks. Shunted state of SPS represents rearward seat position, while non-shunted state represents a forward seat position. SPS is secondary to passenger-side air bag module disable switch and Passenger Presence System (PPS). If either device is in disable mode, passenger-side air bag module will not deploy regardless of SPS status.

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