With Manufacturer's Scan Tool
Engine codes ATW, AUG, AWM to m.y. 2001
Engine code AWM from m.y. 2002:
Special tools and equipment
- V.A.G 1551 scan Tool (or VAG 1552 mobile scan tool) with VAG 1551/3B cable
- VAG 1788/10 RPM adjuster
Test requirements
- Vehicle stationary
- For vehicles with automatic transmission, selector lever must be in -P- or -N-.
- All electrical consumers like, for example, lights and rear window heating must be switched off.
- Intake Air Temperature (IAT) less than 60 °C display group 04, display field 4
- Coolant temperature must be at least 80 °C, display group 04, display field 3
Procedure
- Connect V.A.G 1551 scan tool (VAG 1552). Start engine and select the Engine Control Module (ECM) using address word 01. (connecting scan tool and selecting ECM).
Work step 1: Check DTC Memory
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -2- to select "Check DTC Memory" function 02. Press -Q- button to confirm input.
Number of stored DTCs or "No DTC recognized" will be indicated on display.
X malfunctions recognized!
If a DTC is stored:
- Repair malfunctions that were printed out using DTC table:
SAE P0-Codes P Code Charts
SAE P1-Codes P Code Charts
If no DTCs are stored:
- Press -> button.
Work step 2: Erase DTC Memory
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -5- to select "Erase DTC Memory" function 05. Press -Q- button to confirm input.
NOTE: The readiness code is reset/erased every time DTC memory is erased.
Indicated on display:
Rapid data transfer ->
DTC Memory Is erased!
NOTE: If ignition was switched off between the steps "Check DTC memory" and "Erase DTC memory", DTC memory will not be erased.
- Press -> button.
Work step 3: Diagnostic, oxygen sensor aging before catalytic converter
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" function 04. Press -Q- button to confirm input.
Indicated on display:
Basic setting HELP
Enter display group number XXX
- Press buttons -0-, -3- and -4- to select "Display group number 34". Press -Q- button to confirm input.
Indicated on display; (1 to 4 - display fields)
System in basic setting ->
1 2 3 4
- Adjust engine RPM with VAG 1788/10 RPM adjuster on engine ATW: 1800 to 2200 RPM; engines AUG, AWM: 2300 to 2500 RPM:
- Maintain engine speed until indication in display field 4 jumps from "Test OFF" to "Test ON". The catalytic converter temperature in display field 2 must be at least 350 °C.
- Continue to maintain engine speed until display field 4 indicates specified value "B1-S1 OK".
If specified values are not obtained:
- Check DTC memory.
If specified values are obtained:
- Remove VAG 1788/10 from accelerator pedal.
- Press -C- button.
Work step 4: Diagnostic of operational readiness for the oxygen sensor behind catalytic converter
Indicated on display:
Basic setting
Enter display group number XXX
- Press buttons -0-, -3- and -6- to select "Display group number 36". Press -Q- button to confirm input.
Indicated on display; (1 to 4 = display fields)
System In basic setting 36 ->
1 2 3 4
- Continue to let engine run at idle until specified value "B1-S2 OK" is indicated in display field 2.
If specified values are not obtained:
- Check DTC memory.
If specified values are obtained:
- Press button -3- (V.A.G 1551) or up arrow button (VAG 1552).
Work step 5: Diagnostic of oxygen sensor control system
Indicated on display: (1 to 4 = display fields)
System in basic setting 37 ->
1 2 3 4
If diagnostic is initiated by the Engine Control Module (ECM), the indication in display field 4 will jump from "Test OFF" to "Test ON".
- Continue to let engine run at idle until specified value "Syst. OK" is indicated in display field 4.
If indications do not resemble description:
- Check DTC memory.
If indications resemble description:
- Press -C- button.
Work step 6: Diagnostic of oxygen sensor aging behind catalytic converter
- Press buttons -0-, -4- and -3- to select "Display group number 43". Press -Q- button to confirm input.
Indicated on display: (1 to 4 - display fields)
System in basic setting 43 ->
1 2 3 4
- Use VAG 1788/10 RPM adjuster to adjust engine RPM to; Engine ATW: 1800 to 2200 RPM; engines AUG, AWM: 2300 to 2500 RPM:
- Maintain engine speed until indication in display field 4 jumps from "Test OFF" to "Test ON". The catalytic converter temperature in display field 2 must be at least 350 °C.
- Continue to maintain engine speed until display field 4 indicates specified value "B1-S2 OK".
If indications do not resemble description;
- Check DTC memory.
If indications resemble description:
- Press -C- button.
Work step 7: Diagnostic of catalytic converter
NOTE: This diagnostic can only be completed if the diagnostic of oxygen sensor aging has already been performed successfully.
Indicated on display:
Basic setting
Enter display group number XXX
- Press buttons -0-, -4- and -6- to select "Display group number 46". Press -Q- button to confirm input.
Indicated on display: (1 to 4 - display fields)
System in basic setting 46 ->
1 2 3 4
- Maintain engine speed at: engine ATW: 1800 to 2200 RPM; engines AUG, AWM: 2300 to 2500 RPM until indication in display field 4 jumps from "Test OFF" to "Test ON".
The catalytic converter temperature in display field 2 must be at least 430 °C for engines ATW, AUG; and at least 550 °C for engine AWM.
- Continue to maintain engine speed until display field 4 indicates specified value "Cat-B1 OK".
If specified values are not obtained:
- Check DTC memory.
If specified values are obtained:
- Press -C- button.
- Remove VAG 1788/10 from accelerator pedal.
Work step 8: Diagnostic of EVAP canister system (tank ventilation and leak detection system)
Indicated on display:
Basic setting
Enter display group number XXX
- Press buttons -0-, -7- and -0- to select "Display group number 70". Press -Q- button to confirm input.
Indicated on display: (1 to 4 = display fields)
System in basic setting 70 ->
1 2 3 4
If diagnostic is initiated by the Engine Control Module (ECM), the indication in display field 4 will jump from "Test OFF" to "Test ON".
- Continue to let engine run at idle until specified value "TVV OK" is indicated in display field 4.
If indications do not resemble description:
- Check DTC memory.
If indications resemble description:
- Press button -3- (V.A.G 1551) or uparrow button (VAG 1552).
Indicated on display: (1 to 4 = display fields)
Basic setting 71 ->
1 2 3 4
- Continue to let engine run at idle.
If diagnostic is initiated by the Engine Control Module (ECM), the indication in display field 4 will jump from "Test OFF" to "Test ON".
- Continue to let engine run at idle until specified value "Syst. OK" is indicated in display field 4.
NOTE: If indication in display field 4 jumps from "Test ON" to "Test OFF" during the test and display field 2 indicates "Aborted", repeat "Leak detection diagnostic". During the repetition of the diagnostic, it can last up to approx. 60 seconds before indication in display field 4 switches from "Test OFF" to "Test ON"
If indications do not resemble description;
- Check DTC memory.
If indications resemble description:
- Press -> button.
Work step 9: Diagnostic of Secondary Air Injection (AIR) system
This diagnostic is not indicated unless the engine was operated at least once in deceleration mode.
- Depress accelerator pedal briefly to above 2000 RPM.
- Continue to let engine run at idle.
Indicated on display:
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" function 04. Press -Q- button to confirm input.
Indicated on display:
Basic setting
Enter display group number XXX
- Press buttons -0-, -7- and -7- to select "Display group number 77". Press -Q- button to confirm input.
Indicated on display: (1 to 4 - display fields)
System in basic setting 77 ->
1 2 3 4
If diagnostic is initiated by the Engine Control Module (ECM), the indication in display field 4 will jump from "Test OFF" to "Test ON".
- Continue to let engine run at idle until specified value "Syst. OK" is indicated in display field 4.
If indications do not resemble description:
- Check DTC memory.
If indications resemble description:
- Press -C- button.
Work step 10: Diagnostic of fuel system
Indicated on display:
Basic setting
Enter display group number XXX
- Press buttons -1-, -0- and -7- to select "Display group number 107". Press -Q- button to confirm input.
Indicated on display: (1 to 4 - display fields)
System In basic setting 107 ->
1 2 3 4
If diagnostic is initiated by the Engine Control Module (ECM), the indication in display field 4 will jump from "Test OFF" to "Test ON".
- Continue to let engine run at idle until specified value "Syst. OK" is indicated in display field 4.
If indications do not resemble description:
- Check DTC memory.
If indications resemble description:
- Press -> button.
- Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
- Read readiness code. Readiness Code Reading
Available diagnostics (short trips)
Work Step 1 - 4:
Work Step 5 - 7:
Work Step 8 - 11:
