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 MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 6 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B0081CIRCUIT/SYSTEM TESTING
2009 Chevrolet Tahoe Base, 4.8 C
Circuit/System Testing
2009 Chevrolet Tahoe Base, 4.8 CSECTION Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- The PPS module
- The SDM module
- The PPS module harness connector
- The SDM wiring harness connector
- Ignition ON, the PPS should turn ON the PPS ON/OFF indicators. Verify the PPS illuminates the PPS ON/OFF indicators.
- If the passenger air bag ON/OFF status indicator does not illuminate, refer to Passenger Presence System Indicator Circuit Malfunction .
- Ignition ON, use the scan tool. Go to the PPS menu, then retrieve the DTCs. Verify no PPS DTCs are set.
- If the PPS has any current or history DTCs stored, you must address the PPS DTCs first. Refer to the Diagnostic Trouble Code (DTC) List - Vehicle .
- Check to see if the PPS was replaced. Verify that the correct PPS was installed into the vehicle.
- If the wrong PPS was installed, then replace the correct PPS.
- Ignition OFF, disconnect the PPS module connector. Refer to PPS Replacement in repair instructions for connector location.
- Remove the SDM connector. Refer to SDM Replacement in repair instructions for connector location.
- Test the GMLAN serial data circuit for an open or high resistance between the PPS and SDM connector. Verify no open or high resistance exists.
- If any of the above conditions are found, make the appropriate repair.
- Test the PPS ignition 1 voltage circuit for a short to ground, a high resistance, or an open. Verify no short to ground, a high resistance, or an open exists.
- If any of the above conditions are found, make the appropriate repair.
- Replace the PPS.
- Ignition ON, use the scan tool to clear the DTCs then recheck for DTC B0081. Verify that the DTC does not reset.
- If DTC B0081 was current, replace the SDM.
IMPORTANT:
When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:
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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.