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 MANUALSAUDI2009TT S QUATTRO, 2D COUPEREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSAIR CONDITIONING (COUPE)87 AIR CONDITIONINGDIAGNOSIS AND TESTINGHEATING PERFORMANCE OF A/C SYSTEM, CHECKINGHEAT OUTPUT TEST REQUIREMENTS
2009 Audi TT S Quattro, 2D Coupe
Heat Output Test Requirements
2009 Audi TT S Quattro, 2D CoupeSECTION Heat Output Test Requirements
- Coolant circuit has been bled according to specifications. Refer to [For engine(s) CEPB] General Information or refer to [For engine(s) CETA, CCTA] General Information or refer to [For engine(s) CDMA] General Information or refer to [For engine(s) BPY] General Information .
- All air ducts, covers and seals OK and properly installed
- Air flow through dust and pollen filter not obstructed by dirt.
- Engine is warm
- Climatronic control module -J255- DTC memory was checked and erased, basic setting was performed and Climatronic control module coding was checked. Refer to Vehicle diagnosis, testing and information system VAS5051B under "Guided Fault Finding".
- The Climatronic control module was checked. Refer to Vehicle diagnosis, testing and information system VAS5051B under "Guided Fault Finding".
- Vehicle not exposed to sunlight.
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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.