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 SYSTEMADAPTATION (FUNCTION 10)
1995 Audi 90 Quattro Sport V6-2.8L (AAH)
Adaptation (Function 10)
1995 Audi 90 Quattro Sport V6-2.8L (AAH)SECTION Adaptation (Function 10)
Adaptation
(VAG 1551 function 10)
When selecting "Adaptation" function 10 and channel 01, the ECM executes the same operations as in the "Basic Setting" function O4:
^ Constant ignition timing angle of 12 BTDC in closed throttle position
^ Idle Speed Control (ISC) system adjustment of ignition timing point is blocked
^ The EVAP canister purge regulator valve remains closed
^ A/C compressor is switched OFF
^ The EGR valve remains in the closed position
^ The Engine Coolant Temperature (ECT) signal is ignored; the ECM assumes a constant value of 80°C (176°F)
^ Command is given for the Oxygen Sensor (O2S) control system to "learn" new values
Currently channels 01 and 02 can be selected; channel 01 is used to adjust CO content; channel 02 has no function.
On vehicles with Oxygen Sensor (02S) control (coding 00000 to 00008, see ECM coding), if the stored adaptation values for channels 01 and 02 are changed by entering other adaptation values, this change will have no effect on the engine management system.
Procedure
On vehicles with O2S control, the O2S, EVAP and EGR systems can be deactivated by using ECM codings 009, 010, or 011.
- Connect the VAG 1551, Refer to Connecting and Operating VAG 1551 Scan Tool With MMS 300 Engine Management System
- After the display appears as shown:
Rapid data transfer HELP
Select function XX
- Press buttons 1 and 0 to select "Adaptation" function 10.
- Display will appear as shown:
Rapid data transfer Q
10 - Adaptation
- Press Q button to confirm input.
- Display will appear as shown:
Adaptation
Enter Channel Number XX
- Press buttons 0 and 1 to select channel 1.
- Display will appear as shown:
Adaptation
Enter Channel Number 01
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 128 -->
<-- 1 3 -->
Key to display:
^ Channel number (channel 1)
^ Adaptation (factory-stored adaptation value is displayed)
^ The "arrow" button (used for advancing in sequence to enter adaptation value directly)
^ Button 1 is used to reduce adaptation value
^ Button 3 is used to increase adaptation value
Note:
^ To insert another channel number, press the C button to switch back to the last display.
^ Adaptation value 128 is the average value stored by the factory.
^ Reducing the factory-stored adaptation value (128) leans the mixture (CO content drops), increasing the factory-stored adaptation value richens the mixture (higher CO content).
^ Any reductions or increases of the adaptation value must remain in the tolerance range 110-150.
Adaptive learning sequence
From Display:
Channel 1 Adaptation 128 -->
<-- 1 3 -->
- Press <-- 1 button.
Adaptation value drops.
- Display will appear as shown:
Channel 1 Adaptation 127 Q
1 2 3 4 5 6 7 8 9 10
OR
- Press 3 --> button.
Adaptation value increases.
- Display will appear as shown:
Channel 1 Adaptation 129 Q
1 2 3 4 5 6 7 8 9 10
Note:
^ The appropriate adaptation value and the 10 measurements are displayed as in "Read Measuring Value Block" function 08, display group 000.
^ If the modified adaptation is not going to be stored, switch back the the previous display by pressing the C button
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 129 Q
Store changed value?
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 129 -->
Changed value is stored
- Press "arrow" button.
- Display will appear as shown:
Rapid data transfer HELP
Select function XX
Direct adaptation
From Display:
Channel 1 Adaptation 128 -->
<-- 1 3 -->
- Press "arrow" button
- Display will appear as shown:
Channel 1 Adaptation 128
Input adaption value XXXXX
- Input five digit adaptation value.
^ Example using an adaptation value of 00120.
- Display will appear as shown:
Channel 1 Adaptation 128 Q
Input adaption value 00120
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 120 Q
1 2 3 4 5 6 7 8 9 10
Note:
^ The adaptation value and the 10 measurements are displayed as in "Basic Setting" function 04 display group 000.
^ If the modified adaptation is not going to be stored, switch back to the previous display by pressing the C button.
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 120 Q
Store changed value?
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 120 -->
Changed value is stored
- Press "arrow" button.
- Display will appear as shown:
Rapid data transfer HELP
Select function XX
(VAG 1551 function 10)
When selecting "Adaptation" function 10 and channel 01, the ECM executes the same operations as in the "Basic Setting" function O4:
^ Constant ignition timing angle of 12 BTDC in closed throttle position
^ Idle Speed Control (ISC) system adjustment of ignition timing point is blocked
^ The EVAP canister purge regulator valve remains closed
^ A/C compressor is switched OFF
^ The EGR valve remains in the closed position
^ The Engine Coolant Temperature (ECT) signal is ignored; the ECM assumes a constant value of 80°C (176°F)
^ Command is given for the Oxygen Sensor (O2S) control system to "learn" new values
Currently channels 01 and 02 can be selected; channel 01 is used to adjust CO content; channel 02 has no function.
On vehicles with Oxygen Sensor (02S) control (coding 00000 to 00008, see ECM coding), if the stored adaptation values for channels 01 and 02 are changed by entering other adaptation values, this change will have no effect on the engine management system.
Procedure
On vehicles with O2S control, the O2S, EVAP and EGR systems can be deactivated by using ECM codings 009, 010, or 011.
- Connect the VAG 1551, Refer to Connecting and Operating VAG 1551 Scan Tool With MMS 300 Engine Management System
- After the display appears as shown:
Rapid data transfer HELP
Select function XX
- Press buttons 1 and 0 to select "Adaptation" function 10.
- Display will appear as shown:
Rapid data transfer Q
10 - Adaptation
- Press Q button to confirm input.
- Display will appear as shown:
Adaptation
Enter Channel Number XX
- Press buttons 0 and 1 to select channel 1.
- Display will appear as shown:
Adaptation
Enter Channel Number 01
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 128 -->
<-- 1 3 -->
Key to display:
^ Channel number (channel 1)
^ Adaptation (factory-stored adaptation value is displayed)
^ The "arrow" button (used for advancing in sequence to enter adaptation value directly)
^ Button 1 is used to reduce adaptation value
^ Button 3 is used to increase adaptation value
Note:
^ To insert another channel number, press the C button to switch back to the last display.
^ Adaptation value 128 is the average value stored by the factory.
^ Reducing the factory-stored adaptation value (128) leans the mixture (CO content drops), increasing the factory-stored adaptation value richens the mixture (higher CO content).
^ Any reductions or increases of the adaptation value must remain in the tolerance range 110-150.
Adaptive learning sequence
From Display:
Channel 1 Adaptation 128 -->
<-- 1 3 -->
- Press <-- 1 button.
Adaptation value drops.
- Display will appear as shown:
Channel 1 Adaptation 127 Q
1 2 3 4 5 6 7 8 9 10
OR
- Press 3 --> button.
Adaptation value increases.
- Display will appear as shown:
Channel 1 Adaptation 129 Q
1 2 3 4 5 6 7 8 9 10
Note:
^ The appropriate adaptation value and the 10 measurements are displayed as in "Read Measuring Value Block" function 08, display group 000.
^ If the modified adaptation is not going to be stored, switch back the the previous display by pressing the C button
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 129 Q
Store changed value?
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 129 -->
Changed value is stored
- Press "arrow" button.
- Display will appear as shown:
Rapid data transfer HELP
Select function XX
Direct adaptation
From Display:
Channel 1 Adaptation 128 -->
<-- 1 3 -->
- Press "arrow" button
- Display will appear as shown:
Channel 1 Adaptation 128
Input adaption value XXXXX
- Input five digit adaptation value.
^ Example using an adaptation value of 00120.
- Display will appear as shown:
Channel 1 Adaptation 128 Q
Input adaption value 00120
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 120 Q
1 2 3 4 5 6 7 8 9 10
Note:
^ The adaptation value and the 10 measurements are displayed as in "Basic Setting" function 04 display group 000.
^ If the modified adaptation is not going to be stored, switch back to the previous display by pressing the C button.
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 120 Q
Store changed value?
- Press Q button to confirm input.
- Display will appear as shown:
Channel 1 Adaptation 120 -->
Changed value is stored
- Press "arrow" button.
- Display will appear as shown:
Rapid data transfer HELP
Select function XX
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.