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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1544 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> Air Bag Indicator Circuit Malfunction (Driver) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, verify the SDM Battery Voltage Signal parameter is 9-16 volts.
  2. Ignition OFF, monitor the IPC, ignition ON. The SIR warning indicator should flash then turn OFF.
    • If the SIR warning indicator continually flashes, program the SDM.
    • If the SIR warning indicator remains on steady, test for DTCs and refer to Diagnostic Trouble Code (DTC) List - Vehicle . If no DTC is current, proceed to the next step.
  3. Perform the Display Test in Instrument Panel Cluster/Special Functions. The Air Bag indicator should turn ON and OFF as commanded.
    • If the air bag indicator does not illuminate as expected, replace the IPC.
  4. If all circuits test normal, replace the SDM.
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