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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 455 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> DTC B0083, B0084: Driver Or Passenger SPS Circuit Amperage Out Of Range >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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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