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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 B0022, B0024, B0026, B0042, B0043 or B0044 >> 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 steering wheel coil module
    • The steering wheel module
    • The SDM module
    • The steering wheel coil module wiring harness connector
    • The steering wheel module wiring harness connector
    • The SDM wiring harness connector
  1. Ignition OFF, disconnect the steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement  in Repair Instructions. Then use J 38715-120 to connect the J 38715-A  to the upper steering wheel coil module in-line wiring harness connectors. See Special Tools . Use the PASSENGER INFLATOR and STEERING COLUMN connectors located on the load tool.
  2. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0022, B0024, B0026, B0042, B0043 or B0044 are set current.
    • If DTC B0022, B0024, B0026, B0042, B0043 or B0044 is history replace the steering wheel module.
  3. Ignition OFF, disconnect steering wheel coil module in-line connector. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement  in Repair Instructions for connector location.
  4. Use J 38715-80 to connect the J 38715-A  to the harness side of the steering wheel coil module in-line wiring harness connector. See Special Tools . Use the PASSENGER INFLATOR and BASE of COLUMN connectors located on the load tool.
  5. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0022, B0024, B0026, B0042, B0043 or B0044 are set current.
    • If DTC B0022, B0024, B0026, B0042, B0043 or B0044 is history replace the steering wheel coil module.
  6. Ignition OFF, disconnect and remove the J 38715-A  and adapter. See Special Tools . Then remove the SDM connector, refer to Inflatable Restraint Sensing and Diagnostic Module Replacement  in Repair Instructions for connector location.
  7. Test the high and low circuits between the SDM and steering wheel coil module for a short to voltage, short to ground, an open or 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.
  8. 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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