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 MANUALSAUDI2001A6 AVANT QUATTROREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMIGNITION SYSTEM - 2.8L V6 AHAIGNITION SYSTEMMOTRONIC IGNITION SYSTEMMISFIRE RECOGNITION, CHECKINGCHECKING
2001 Audi A6 Avant Quattro
Misfire recognition, checking: Checking
2001 Audi A6 Avant QuattroSECTION Checking
- Connect VAG1551/1552 Scan Tool (ST) and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with engine running at idle). See VAG1551/VAG1552 SCAN TOOL (ST), CONNECTING AND SELECTING "ENGINE ELECTRONICS" ADDRESS WORD 01 .
Indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08, and press -Q- button to confirm input.
Indicated on display
- Press buttons -0-, -1- and -4- to input display group number 14 (014), and press -Q- button to confirm input.
Indicated on display (1-4 - display groups)
- Compare displayed values with specified values for misfire recognition (display fields 3-4):
DISPLAY GROUP 14: MISFIRE RECOGNITION
| Display groups | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group 14: Misfire recognition | ||||
| Display | xxx RPM | xx.xx ms | xxx | activated deact |
| Indicates | Engine speed (in 40 RPM steps) |
Engine load | Misfire harmful to emissions (total) | Misfire recognition status |
| Range | 0-6800 RPM | 0.00-12.75 ms | - | - |
| Specified value | 600-760 RPM (all-wheel drive) |
1.0-2.5 ms | 30 | activated |
| 680-840 RPM (front -wheel drive) |
||||
| - | - | If displayed values are NOT OK, see EVALUATION OF DISPLAY GROUPS 15 AND 16 . | ||
If displayed values are OK:
- Press --> button.
- Press buttons -0- and -6- to select "End Output" function 06, and press -Q- button to confirm input.
- Check readiness code. See READINESS CODE .
- If Diagnostic Trouble Code (DTC) memory has been erased, or ECM has been disconnected, generate new readiness code. See READINESS CODE, CHECKING .
If displayed values are NOT OK:
- Press -C- button.
- Press buttons -0-, -1- and -5- to input display group number 15 (015), and press -Q- button to confirm input.
Indicated on display (1-4 - display groups)
- Compare displayed values with specified values for misfire recognition (display fields 1-4):
DISPLAY GROUP 15: MISFIRE RECOGNITION
| Display groups | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group 15: Misfire recognition | ||||
| Display | xxx | xxx | xxx | activated deact |
| Indicates | Misfire harmful to emissions, Cyl. 1 | Misfire harmful to emissions, Cyl. 2 | Misfire harmful to emissions, Cyl. 3 | Misfire recognition status |
| Range | 500 | 500 | 500 | - |
| Specified value | 0 - 5 | 0 - 5 | 0 - 5 | activated |
| If displayed values are NOT OK, see EVALUATION OF DISPLAY GROUPS 15 AND 16 . | ||||
If displayed values are OK:
- Press -C- button.
- Press buttons -0-, -1- and -6- to input display group number 16 (016), and press -Q- button to confirm input.
Indicated on display (1 -4 - display groups)
- Compare displayed values with specified values for misfire recognition (display fields 1 and 4):
DISPLAY GROUP 16: MISFIRE RECOGNITION
| Display groups | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group 16: Misfire recognition | ||||
| Display | xxx | xxx | xxx | activated deact |
| Indicates | Misfire harmful to emissions, Cyl. 4 | Misfire harmful to emissions, Cyl. 5 | Misfire harmful to emissions, Cyl. 6 | Misfire recognition status |
| Range | 500 | 500 | 500 | - |
| Specified value | 0 - 5 | 0 - 5 | 0 - 5 | activated |
| If displayed values are NOT OK, go to EVALUATION OF DISPLAY GROUPS 15 AND 16 | ||||
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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.