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 MANUALSSATURN2009ASTRA XR, 2D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSCELLULAR, ENTERTAINMENT, AND NAVIGATIONDIAGNOSTIC INFORMATION AND PROCEDURESONSTAR CALL CENTER REMOTE FUNCTION REQUESTS MANFUNCTIONCIRCUIT/SYSTEM TESTING
2009 Saturn Astra XR, 2D Hatchback, Automatic
Circuit/System Testing
2009 Saturn Astra XR, 2D Hatchback, AutomaticSECTION Circuit/System Testing
Remote Door Locks Malfunction
- Ignition OFF, disconnect the harness connector at the OnStar interface module.
- Ignition ON, test for less than 1 volt between the signal circuit terminal 3 and ground.
- If greater than the specified range, test the signal circuit for a short to voltage.
- Test for infinite resistance between the signal circuit terminal 3 and ground.
- If not the specified value, test the signal circuit for a short to ground.
- If all circuits test normal, replace the OnStar interface module.
Remote Horn Malfunction
- Ignition OFF, disconnect the harness connector at the OnStar interface module.
- Ignition ON, test for less than 1 volt between the signal circuit terminal 4 and ground.
- If greater than the specified range, test the signal circuit for a short to voltage.
- Test for infinite resistance between the signal circuit terminal 4 and ground.
- If not the specified value, test the signal circuit for a short to ground.
- If all circuits test normal, replace the OnStar interface module.
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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.