Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit/System Testing
2004 Oldsmobile Bravada RWDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Saturn Vue. 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
- Verify DTC B0090 39 is not set.
- If DTC is set, replace the rollover sensor.
- Ignition OFF, disconnect the harness connector at the rollover sensor and the SDM.
- 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.
- 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.
- 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.
- 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.
- With a scan tool, clear DTCs. Verify DTC B0090 is not set.
- If DTC is set, replace the SDM.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.