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 MANUALSAUDI1996A4 BASE, STANDARDREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSA/C-HEATER SYSTEM - AUTOMATICSELF-DIAGNOSTICSBASIC SETTING
1996 Audi A4 Base, Standard
Basic Setting
1996 Audi A4 Base, StandardSECTION Basic Setting
- Check Diagnostic Trouble Code (DTC) memory. See DIAGNOSTIC TROUBLE CODE MEMORY . Repair A/C system malfunctions (if any). Erase DTC memory, and check coding of A/C-heater control panel. See A/C-HEATER CONTROL PANEL CODING.
- Ensure scan tester is in A/C/HEATING ELECTRONICS function. With RAPID DATA TRANSFER displayed on scan tester, press "0" and "4" buttons to select START BASIC SETTING function. Press "Q" button to enter input.
- With ENTER DISPLAY NUMBER XX displayed on scan tester, press "0" and "4" buttons. Press "Q" button to enter input. Flap motors will then be actuated in the following sequence: temperature regulator flap motor, central flap motor, footwell/defroster flap motor, and air-flow flap motor. End positions are determined from resistance values of potentiometers installed in flap motors.
- When all readout fields on scan tester indicate "0", basic setting is complete. Press right arrow button to end procedure. If DTC for A/C engine coolant temperature sensor is set, erase DTC memory.
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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.