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, 4D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEBODY, CAB CONTROL SYSTEMSDATA COMMUNICATIONSDESCRIPTION AND OPERATIONBODY CONTROL SYSTEM DESCRIPTION AND OPERATION (REAR ELECTRICAL CENTER)REAR ELECTRICAL CENTER (REC)OTHER FUNCTIONS
2009 Saturn Astra XR, 4D Hatchback, Automatic
Other functions
2009 Saturn Astra XR, 4D Hatchback, AutomaticSECTION Other functions
- Tank fill level, the REC reads in the value from the tank fill level sensor and transmits this on the bus.
- Trailer module; a trailer module can be connected to the REC. The wiring harness for the trailer coupling is then connected to this. If the REC detects that a trailer is actually connected, it sends a corresponding message on the bus, actuates the lights on the trailer and will also monitor the bulbs in the trailer lighting. However, the rear fog lamp and the reversing light of the trailer will not be monitored, as most commercially-available trailers are not fitted with this function.
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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.