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 DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSA/C-HEATER SYSTEM - AUTOMATICSELF-DIAGNOSTICSNOTES
1996 Audi A4 Base, Standard
A/C-Heater System - Automatic: Self-Diagnostics: Notes
1996 Audi A4 Base, StandardSECTION Notes
DTC INDEX
| DTC | Description |
|---|---|
| DTC 00000 | NO DTC RECOGNIZED |
| DTC 00529 | SPEED INFORMATION MISSING |
| DTC 00532 | SUPPLY VOLTAGE TOO LOW |
| DTC 00600 | TEMPERATURE REGULATOR FLAP MOTOR POSITION SENSOR |
| DTC 00601 | CENTRAL FLAP MOTOR POSITION SENSOR |
| DTC 00602 | FOOTWELL/DEFROSTER MOTOR POSITION SENSOR |
| DTC 00603 | FOOTWELL/DEFROSTER FLAP MOTOR |
| DTC 00604 | BACK PRESSURE FLAP MOTOR POSITION SENSOR |
| DTC 00625 | ROAD SPEED SIGNAL |
| DTC 00779 | OUTSIDE AIR TEMPERATURE SENSOR |
| DTC 00785 | INSTRUMENT PANEL INTERIOR TEMPERATURE SENSOR |
| DTC 00787 | FRESH AIR INTAKE DUCT TEMPERATURE SENSOR |
| DTC 00797 | SUNLIGHT PHOTO SENSOR |
| DTC 00801 | HIGH PRESSURE CUT-OUT SWITCH |
| DTC 01270 | A/C CLUTCH (OPEN CIRCUIT) |
| DTC 01270 | A/C CLUTCH (SPEED DIFFERENCE TOO GREAT) |
| DTC 01270 | A/C CLUTCH (MECHANICAL MALFUNCTION) |
| DTC 01271 | TEMPERATURE REGULATOR FLAP MOTOR |
| DTC 01272 | CENTRAL AIR FLAP MOTOR |
| DTC 01273 | FRESH AIR BLOWER |
| DTC 01274 | AIRFLOW FLAP MOTOR |
NOTE:
Scan Tester (VAG 1551) must be used to make full use of the system's self-diagnostic capabilities.
RENDER: 1.0x
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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.