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 311 ENGINE MANAGEMENT SYSTEMCHECK CONTROL MODULE VERSION
1995 Audi 90 Quattro Sport V6-2.8L (AAH)
Check Control Module Version
1995 Audi 90 Quattro Sport V6-2.8L (AAH)SECTION Check Control Module Version
REQUIREMENTS
- Fuses for engine electronics OK
- Fuel pump relay OK.
- Ground connections OK.
PROCEDURE
- Connect the VAG 1551, Refer to Connecting and Operating VAG Scan Tool With MMS 311 Engine Management System
- After the display appears as shown:
Rapid data transfer HELP
Select function XX
- Select function code.
^ Check Control Module Version, Function 01
- Display will appear as shown:
Rapid data transfer HELP
01 - Check Control Module Version
- Press Q button to enter input.
The engine control module identification number is indicated via the display, for example: 8A0 906 266 B. Display will appear as follows:
8A0 906 266 E 2.8L V6/2V MPI D02
Coding 01042 WFC 06388
- Display breakdown is as follows:
^ ECM identification: 8A0 906 266 E (example)
^ Engine displacement: 2.8 liters
^ Engine type: V-engine, 6 cylinder
^ Number of valves per cylinder: 2 valves
^ Fuel injection system: MPI multiport fuel injection
^ ECM hardware and software version: D02
^ ECM coding: e.g. 01042
^ Current code number for the factory or service facility that was used to carry out the last coding and/or adaptation with the VAG 1551 scan tool: WSC 06388
- Check for correct ECM coding, Refer to Engine Control Module Coding Table. Engine Control Module Coding Table
NOTE: Only during idle speed do correct specifications regarding the engine control module number and related coding occur.
- Fuses for engine electronics OK
- Fuel pump relay OK.
- Ground connections OK.
PROCEDURE
- Connect the VAG 1551, Refer to Connecting and Operating VAG Scan Tool With MMS 311 Engine Management System
- After the display appears as shown:
Rapid data transfer HELP
Select function XX
- Select function code.
^ Check Control Module Version, Function 01
- Display will appear as shown:
Rapid data transfer HELP
01 - Check Control Module Version
- Press Q button to enter input.
The engine control module identification number is indicated via the display, for example: 8A0 906 266 B. Display will appear as follows:
8A0 906 266 E 2.8L V6/2V MPI D02
Coding 01042 WFC 06388
- Display breakdown is as follows:
^ ECM identification: 8A0 906 266 E (example)
^ Engine displacement: 2.8 liters
^ Engine type: V-engine, 6 cylinder
^ Number of valves per cylinder: 2 valves
^ Fuel injection system: MPI multiport fuel injection
^ ECM hardware and software version: D02
^ ECM coding: e.g. 01042
^ Current code number for the factory or service facility that was used to carry out the last coding and/or adaptation with the VAG 1551 scan tool: WSC 06388
- Check for correct ECM coding, Refer to Engine Control Module Coding Table. Engine Control Module Coding Table
NOTE: Only during idle speed do correct specifications regarding the engine control module number and related coding occur.
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.