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 MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 235 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B0081 (BASE)CIRCUIT/SYSTEM TESTING
2008 Chevrolet HHR LT, 2.4 P, Automatic
Circuit/System Testing
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- PPS module
- SDM module
- PPS wiring harness connector
- SDM wiring harness connector
- Ignition ON, 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, with the scan tool. Retrieve the DTCs, refer to Passenger Presence System Displaying Code Procedure (Base) . Verify no PPS DTCs are set.
- If the PPS has any current or history DTCs stored, refer to the Diagnostic Trouble Code (DTC) List - Vehicle .
- Verify that the correct PPS was installed into the vehicle.
- If the wrong PPS was installed then replace with the correct PPS.
- Ignition OFF, disconnect the harness connector at PPS module.
- Ignition OFF, test for less than 1.0 ohm between the ground circuit terminal 3 and ground.
- If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance.
- Ignition ON, engine ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 2 and ground.
- If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PPS module.
- Ignition OFF, disconnect the harness connector at the SDM.
- Test for less than 1.0 ohm along the occupant sensor serial data circuit terminal 1 to terminal 60.
- If greater than the specified range, test the signal circuit for an open/high resistance.
- If all circuits test normal, test or 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.