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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 132 (Seat Belt System) >> Diagnostic Information and Procedures >> Seat Belt Indicator Circuit Malfunction - Driver >> 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 switch - left
    • The SDM module
    • The seat belt switch - left wiring harness connector
    • The SDM wiring harness connector
  1. Observe the fasten seat belt indicator located in the IPC. Turn ON the ignition and use the scan tool. Buckle the driver seat belt and monitor the Driver Side Belt Status parameter in the SIR scan tool data list in the scan tool. Verify that the Seat Belt indicator turns ON while the scan tool shows the driver seat belt is buckle.
    • If the scan tool displays the driver seat belt is buckled and driver seat belt indicator does not turn ON replace the IPC.
  2. Sit in the front driver seat with the ignition ON and with a scan tool. Monitor the scan tool and while buckling and unbuckling the driver seat belt. Verify the scan tool is showing the driver seat belt is buckling and unbuckling.
    • If the scan tool indicates that the driver seat belt does perform as described turn OFF the ignition, remove the SDM connector and the driver seat belt buckle connector. Refer to SDM replacement in Repair Instructions  for connector location.
    • Test and repair both seat belt switch - left signal and ground circuits for an open, high resistance.
  3. If all circuits test normal then replace the seat belt pretensioner- left.
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