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.
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HOMESERVICE MANUALSCHEVROLET2010CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISRESTRAINTSAIR BAG, SRSSUPPLEMENTAL INFLATABLE RESTRAINT SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B0090CIRCUIT/SYSTEM TESTING
2010 Chevrolet Chevy Express G3500, Van Passenger Extended
Circuit/System Testing
2010 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Circuit/System Testing
IMPORTANT:
When removing connectors inspect for damage or corrosion. Damage or corrosion to 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 or B0090 71 is not set.
- If either DTC is set, replace the rollover sensor.
- Verify DTC B0090 3A is not set.
- If the DTC is set, verify the correct part number ROS is installed in the vehicle. If the installed ROS is incorrect, replace the ROS.
- Ignition OFF, disconnect the harness connector at the ROS.
- Test for less than 5 ohms between the ground circuit terminal 6 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Test for less than 1 volt between the signal circuit terminal 5 and ground.
- If greater than the specified range, test the signal circuit for a short to voltage.
- Ignition OFF, disconnect the harness connector at the SDM.
- Test for less than 5 ohms between the signal circuit terminal 5 at the ROS harness connector and the signal circuit terminal 58 at the SDM harness connector.
- If greater than the specified range, test the signal circuit for an open/high resistance.
- Ignition ON, test for less than 1 volt between the signal circuit terminal 5 at the ROS harness connector and B+.
- If greater than the specified range, test the signal circuit for a short to ground.
- If all circuits test normal, replace the ROS.
- Reconnect all SIR components. Ignition ON, verify the DTC is not set as current.
- If the DTC resets as current, replace the SDM.
RENDER: 1.0x
NO RELATED
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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.