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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 B0064, B0065 or B0066 >> 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 seat belt retractor pretensioner - LF
    • The SDM module
    • The seat belt retractor pretensioner - LF wiring harness connector
    • The SDM wiring harness connector
  1. Ignition OFF, disconnect the seat belt pretensioner - LF wiring harness connector located under the driver front seat.
  2. Use the J 38715-A  to connect the harness side of the seat belt pretensioner - LF 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 B0064, B0065 or B0066 is set current.
    • If DTC B0064, B0065 or B0066 is history replace the seat belt pretensioner - LF.
  4. Ignition OFF, disconnect and remove the J 38715-A  . See Special Tools . Then remove the SDM connector. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement  in Repair Instructions for connector location.
  5. Test the high and low circuits between the SDM and seat belt pretensioner - LF 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.
  6. If all circuits test normal then replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement  in Repair Instructions.
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