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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 99 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0100, B0101, B0102, B0103, B0104 or B0105 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. 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 front end sensor
    • The SDM module
    • The front end sensor wiring harness connector
    • The SDM wiring harness connector
  1. Ignition ON, use the scan tool as clear SIR codes then recheck for DTCs. Verify that DTC B0101, B0102, B0104 or B0105 is not set.
    • If DTC B0101 or B0102 is set current replace the front end sensor 1/left.
    • If DTC B0104 or B0105 is set current replace the front end sensor 2/right.
  2. If DTC B0100 is current, disconnect the front end sensor 1 connector or if DTC B0103 is current disconnect the front end sensor 2 connector. Refer to Inflatable Restraint Front End Sensor Replacement  in Repair Instructions for location of connector.
  3. Remove the SDM connector, refer to Inflatable Restraint Sensing and Diagnostic Module Replacement  in Repair Instructions for connector location.
  4. Test the signal and voltage circuits between the SDM and front end sensor. 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.
  5. Reconnect all SIR components. Ignition ON, use the scan tool to clear the DTCs then recheck for DTCs. Verify no DTCs are set.
    • If DTC B0100 was current replace the front end sensor 1. After replacement, refer to Repair Instructions .
    • If DTC B0103 was current replace the front end sensor 2. After replacement, refer to Repair Verification .
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