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SIR Schematics Connector End View Reference SIR Connector End Views Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Circuit/System Testing 1. If DTC B3856 or B3857 is current, replace the ROS. 2. Test the signal and voltage circuits between the SDM and ROS for a short to voltage, short to ground or open/low resistance. Verify that a short to voltage, short to ground or open/low If any of the above conditions are found make the appropriate repair. 3. Reconnect all SIR components. Ignition ON, use the scan tool to clear the DTCs then recheck for DTCs. Verify DTC B3855 does not set. If DTC B3855 was current, replace the ROS. After replacement, refer to Repair Repair Procedures Inflatable Restraint Vehicle Rollover Sensor Replacement SIR/SRS Wiring Repairs Control Module References for SDM replacement, setup and programming Repair Verification Ignition ON, use the scan tool to clear the DTC, then recheck for DTC. If DTC B3855 was current replace the SDM. DTC U1241 Diagnostic Instructions
2007 Hummer H3 2007 RESTRAINTS Supplemental Inflatable Restraints - H3
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