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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 181 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B1001 (SDM) >> Circuit/System Verification

Circuit/System Verification

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IMPORTANT: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
  • SDM
  • SDM wiring harness
  1. Ignition ON, verify the scan tool Secondary Key Status displays Valid.
    • If not the specified value, verify the scan tool Received VIN Digits 2-7 match the vehicle VIN, if the VIN does not match, reprogram the BCM. If the VIN matches, reprogram the SDM.
  2. Ignition ON, verify the scan tool Primary Key Status displays Valid.
    • If not the specified value, verify the scan tool SDM Primary Key matches the Received Primary Key, if the key does not match, perform the Setup SDM Primary Key in BCM procedure.
  3. With a scan tool, verify DTC B1001 is not set as current.
    • If DTC is set as current, replace the SDM.
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