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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 158 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> Air Bag Warning Light Malfunction >> Circuit Description

Circuit Description

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AIR BAG warning light is controlled by Sensing and Diagnostic Module (SDM). When ignition is turned on, AIR BAG warning light will flash 7 times, during which time SDM checks SIR system for malfunctions. If no malfunctions are detected, AIR BAG warning light will go off. If a malfunction is detected, AIR BAG warning light will stay on.



If ignition voltage is outside of normal operation range (9-16 volts), AIR BAG warning light will stay on with no Diagnostic Trouble Codes (DTC's) set.

NOTE: For circuit number and wire color identification, see WIRING DIAGRAMS .