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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Outlook, 2009 GMC Acadia, 2009 Chevrolet Traverse, and 2009 Buick Enclave. 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.
  • Vehicle rollover sensor
  • SDM module
  • Vehicle rollover sensor harness connector
  • SDM wiring harness connector
  1. Verify DTC B0090 39 is not set.
    • If DTC is set, replace the rollover sensor.
  2. Ignition OFF, disconnect the harness connector at the rollover sensor and the SDM.
  3. Test for less than 5 ohms between the rollover sensor ground circuit terminal 6 and ground.
    • If greater than the specified range, test the circuit for an open/high resistance.
  4. Test for less than 5 ohms between the serial data circuit terminal 5 and the SDM occupant sensor serial data circuit terminal 58.
    • If greater than the specified range, test the circuit for a short to ground or an open/high resistance.
  5. Ignition ON, test for less than 1 volt between the serial data circuit terminal 5 and ground.
    • If greater than the specified range, test the circuit for a short to voltage.
  6. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the circuit for an open/high resistance. If the circuit fuse is open, test the circuit for a short to ground, if the circuit tests normal, replace the rollover sensor.
  7. With a scan tool, clear DTCs. Verify DTC B0090 is not set.
    • If DTC is set, replace the SDM.
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