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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0023 >> Circuit/System Testing

Circuit/System Testing

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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 component/connector.
    • The roof rail module - right
    • The SDM module
    • The roof rail module - right wiring harness connector
    • The SDM wiring harness connector
  1. Ignition OFF, remove the center pillar trim and disconnect the roof rail module - right connector. Refer to Garnish Molding Replacement - Center Pillar Upper .
  2. Connect the J 38715-A  to the harness side of the roof rail module - right connector. See Special Tools . Use the PASSENGER INFLATOR connector located on the load tool.
  3. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0023 is set in history.
    • If DTC B0023 is history replace the roof rail module - right.
  4. Ignition OFF, disconnect and remove the J 38715-A  . See Special Tools . Then remove the SDM connector. Refer to SDM Replacement  in Repair Instructions for connector location.
  5. Test the high and low circuits between the SDM and roof rail module - right for a short to voltage, short to ground, or open/low resistance.
    • If any of the above conditions are found make the appropriate repair.
  6. If all circuits test normal then replace the SDM.
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