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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 855 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0079 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:
    • The seat position sensor
    • The SDM module
    • The seat position sensor wiring harness connector
    • The SDM wiring harness connector
  1. Ignition OFF, if DTC B0079 is current, disconnect the left SPS connector.
  2. Remove the SDM connector.
  3. Test the low reference and signal circuits between the SDM and SPS. Verify that a short to voltage, short to ground, or open/low resistance does not exist.
    • If any of the above conditions are found, make the appropriate repair.
  4. Reconnect all SIR components. Ignition ON, use the scan tool to clear the DTCs then recheck for DTCs. Verify DTC B0079 does not set.
    • If DTC B0079 was current, replace the left SPS. After replacement, refer to Repair Verification .
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