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 MANUALSAUDI199590 QUATTRO SPORT V6-2.8L (AAH)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL TESTINGWITH MMS 300 ENGINE MANAGEMENT SYSTEMBASIC SETTING (FUNCTION 04)BASIC SETTING OVERVIEW
1995 Audi 90 Quattro Sport V6-2.8L (AAH)
Basic Setting Overview
1995 Audi 90 Quattro Sport V6-2.8L (AAH)SECTION Basic Setting Overview
Engine Basic Setting
(VAG 1551 function 04)
^ The engine management system uses a learning function to set certain parameters which by design eliminates the possibility of mechanical adjustment. The current engine basic setting (the current learned values) will be erased if the Engine Control Module (ECM) and/or battery are disconnected. After selecting "Basic Setting" function 04, the engine may have a rough idle for a short period as the system "learns" the new values. When this occurs, let the engine idle for a few minutes until the learning process is completed and the engine resumes running smoothly
^ By initiating "Basic Setting" function 04 using the VAG 1551 scan tool, all the learning requirement displays (display group 007 and/or 008) will be set to zero. This is to force the ECM to adapt to new oxygen sensor learned values (following repairs).
^ Learning is suspended if a malfunction is stored in DTC memory that affects oxygen sensor control (but not with sporadic malfunctions).
(VAG 1551 function 04)
^ The engine management system uses a learning function to set certain parameters which by design eliminates the possibility of mechanical adjustment. The current engine basic setting (the current learned values) will be erased if the Engine Control Module (ECM) and/or battery are disconnected. After selecting "Basic Setting" function 04, the engine may have a rough idle for a short period as the system "learns" the new values. When this occurs, let the engine idle for a few minutes until the learning process is completed and the engine resumes running smoothly
^ By initiating "Basic Setting" function 04 using the VAG 1551 scan tool, all the learning requirement displays (display group 007 and/or 008) will be set to zero. This is to force the ECM to adapt to new oxygen sensor learned values (following repairs).
^ Learning is suspended if a malfunction is stored in DTC memory that affects oxygen sensor control (but not with sporadic malfunctions).
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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.