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 337 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC 300ACIRCUIT/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 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.
- PPS module
- PPS wiring harness connector
- Ignition OFF, disconnect the harness connector at the inflatable restraint front PPS sensor.
- Ignition OFF, test for less than 1.0 ohm between the low reference circuit terminal C and ground.
- If not within the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PPS.
- Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
- If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PPS module.
- If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the PPS module.
- Ignition OFF, disconnect the harness connector at the PPS module.
- Ignition OFF, test for infinite resistance between the signal circuit terminal B and ground.
- If not the specified value, test the signal circuit for a short to ground.
- Ignition ON, test for less than 1.0 volt between the signal circuit terminal B and ground.
- If not within the specified range, test the signal circuit for a short to voltage.
- Test for less than 1.0 ohm between the signal circuit terminal B at the sensor harness connector and terminal 6 at the PPS harness connector.
- If greater than the specified range, test the signal circuit for an open/high resistance.
- If all circuits test normal, test or replace the inflatable restraint PPS sensor.
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.