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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 B0083 or B0084 >> 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 front end sensor
    • The SDM module
    • The front end sensor wiring harness connector
    • The SDM wiring harness connector
  1. Ignition ON, if DTC B0083 is current, disconnect the front end sensor - left connector. If DTC B0084 is current, disconnect the front end sensor - right connector. Refer to Front End Sensor Replacement  in Repair Instructions for location of connector.
  2. Remove the SDM connector. Refer to SDM Replacement  in Repair Instructions for connector location.
  3. Test the signal and voltage circuits between the SDM and front end sensor for a short to voltage, short to ground, or open/low resistance. 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. With the ignition ON, use the scan tool to clear the DTCs then recheck for DTCs.
    • If DTC B0083 was current, replace the front end sensor - left. If DTC B0084 was current, replace the front end sensor - right. After replacement refer to Repair Verification.
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