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With Manufacturer's Scan Tool



Readiness code, generating

Special tools and equipment
VAG1551 or VAG1552 Scan Tool (ST) with VAG1551/3 adapter cable

Test requirements
- Vehicle not moving
- Automatic transmission selector lever in "P" or "N" position
- All electrical consumers switched off (coolant fan must not run during test)
- A/C switched off
- Throttle valve angle less than 10 angle degree See VAG1551 scan tool function 08, display group 003, display field 3
- Intake air temperature less than 90°C (194°F) See VAG1551 scan tool function 08, display group 004, display field 4
- Coolant temperature less than 95°C (203°F) See VAG1551 scan tool function 08, display group 004, display field 3

Test sequence
- Connect VAG1551/VAG1552 Scan Tool (ST) and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with ignition switched on), [1][2][3][4]Connecting VAG 1551 Scan Tool

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, and press -Q- button to confirm input.

The number of DTCs recognized or "No DTC recognized" will be indicated on display.

X DTC recognized

If one or more DTCs are recognized:
- Repair cause of malfunction using appropriate DTC table:
P0 codes. P Code Charts
P1 codes. P Code Charts

If no DTCs were recognized:
- Press -> button.

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, and press -Q- button to confirm input.

NOTE:
- When erasing DTC memory, the readiness code is also erased.
- Switching the ignition off between "Checking DTC Memory" and "Erasing DTC Memory" will not allow DTC memory to be erased.

Indicated on display

Rapid data transfer ->
DTC Memory is erased

- Press -> button.

Step 3: Adaptation of throttle valve control module to ECM

Indicated on display

Rapid data transfer HELP
Select function XX

- Press buttons -0- and -4- to select "Basic Setting" function 04, and press -Q- button to confirm input.

Indicated on display

System in Basic Setting HELP
Input display group number XXX

- Terminate basic setting after waiting 30 seconds by pressing -> button.
- Press buttons -0-, -6- and -0- to input display group number 60 (060), and press -Q- button to confirm input.

Indicated on display (1-4 - display fields)

System in Basic Setting 60 "
1 2 3 4

- Check specified values in display fields 3 and 4:

Display Group 60:






Step 4:
- Start engine and let run at idle.

NOTE: During the test sequence the engine must not be turned off.

Step 5: Oxygen Sensor (O2S) control operating condition

Indicated on display

Rapid data transfer HELP
Select function XX

- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08, and press -Q- button to confirm input.

Indicated on display

Read Measuring Value Block HELP
Input display group number XXX

- Press buttons -0-, -3- and -0- to input display group number 30 (030), and press -Q- button to confirm input.

Indicated on display (1-4 = display fields)

Read Measuring Value Block 30 ->
1 2 3 4

- Set engine speed to 1800-2200 RPM.
- Hold at 1800-2200 RPM until specified value "111" is shown in all of display fields 1-4.

Display Group 30:






Explanation of 3-digit value in display fields 1 through 4:






If the specified values are not obtained:
- Check DTC memory.

If the specified values for display fields 1-4 are obtained:
- Continue to hold engine speed at 1800-2200 RPM.
- Press -> button.

Step 6: Oxygen Sensor (O2S) aging (time period)

Indicated on display

Rapid data transfer HELP
Select function XX

- Press button -4- to select "Basic Setting" function 04.

Indicated on display

Basic Setting HELP
Input display group number XXX

- Press button -0-, -3- and -4- to advance to display group number 34 (034).

Indicated on display (1-4 = display fields)

System in Basic Setting 34 "
1 2 3 4

- Hold engine speed at 1800-2200 RPM until display changes from "Test OFF" to "Test ON" in display field 4.
- Continue to hold at 1800-2200 RPM until specified value "B1-S1.OK" is indicated in display field 4.






If "B1-S1 n. OK" is indicated in display field 4:
- Check DTC memory.

If the specified value "B1-S1 OK" is indicated in display field 4:
- Continue to hold engine speed at 1800-2200 RPM.
- Press button -3- (VAG1551) or press Uparrow button (VAG1552) once to advance to display group number 35.

If "B2-S1 n. OK" is indicated in display field 4:
- Check DTC memory.

If the specified value "B2-S1 OK" is indicated in display field 4:
- Continue to hold engine speed at 1800-2200 RPM.
- Press -C- button.

Indicated on display (1-4 = display fields)

System in Basic Setting 35 "
1 2 3 4

- Hold engine speed at 1800-2200 RPM until display changes from "Test OFF" to "Test ON" in display field 4.
- Continue to hold at 1800-2200 RPM until specified value "B2-S1 OK" is indicated in display field 4.

Display Group 35:






Step 7: Three Way Catalytic Converter (TWC) diagnosis

Indicated on display

Basic Setting HELP
Input display group number XXX

- Press buttons -0-, -4- and -6- to input display group number 46 (046), and press -Q- button to confirm input.

Indicated on display (1-4 = display fields)

System in Basic Setting 46 "
1 2 3 4

- Hold engine speed at 1800-2200 RPM until display changes from "Test OFF" to "Test ON" in display field 4.
- Continue to hold at 1800-2200 RPM until specified value "Cat B1 OK" is indicated in display field 4.

NOTE: The test time for TWC diagnosis is approx. 60 seconds.





If "Cat B1 n.OK" is indicated in display field 4:
- Check DTC memory.

If specified value "Cat B1 OK" is indicated in display field 4:
- Continue to hold engine speed at 1800-2200 RPM.
- Press button -3- (VAG1551) or press Uparrow button (VAG1552) once to advance to display group number 47.

Indicated on display (1-4 = display fields)

System in Basic Setting 47 "
1 2 3 4

- Hold engine speed at 1800-2200 RPM until display changes from "Test OFF" to "Test ON" in display field 4.
- Continue to hold at 1800-2200 RPM until specified value "Cat B2 OK" is indicated in display field 4.

NOTE: The test time for TWC diagnosis is approx. 60 seconds.

Display Group 47:






If "Cat B2 n. OK" is indicated in display field 4:
- Check DTC memory.

If specified value "Cat B2 OK" is indicated in display field 4:
- Let engine return to idle.
- Press -C- button.

Step 8: Evaporative Emission (EVAP) system and fuel tank leak detection

NOTE: During this diagnosis there should be no engine load, otherwise the diagnosis is interrupted and can only be restarted after pressing the accelerator pedal momentarily.

Test conditions
- Throttle valve angle less than 10 lamda angle See VAG1551 scan tool function 08, display group 003, display field 3
- Intake air temperature less than 90 °C (194 °F) See VAG 1551 scan tool function 08, display group 004, display field 4
- Engine coolant temperature less than 95 °C (203 °F) See VAG1551 scan tool function 08, display group 004, display field 3

Test sequence
- Start engine and let run at idle for 30 seconds and then check specifications.

Indicated on display

Basic Setting HELP
Input display group number XXX

If "EVAP n.OK" is indicated in display field 4:
- Check DTC memory.
- Press buttons -0-, -7- and -0- to input display group number 70 (070), and press -Q- button to confirm input.

Indicated on display (1-4 = display fields)

System in Basic Setting 70 "
1 2 3 4

When the diagnosis is initiated by the ECM, the display changes from "Test OFF" to "Test ON" in display field 4.
- Let engine continue to run at idle until specified value "EVAP OK" is indicated in display field 4.

Display Group 70:






If the specified value "EVAP OK" is indicated in display field 4:
- Press button -3- (VAG1551) or press Uparrow button (VAG1552) once to advance to display group number 71.

Indicated on display (1-4 = display fields)

System in Basic Setting 71 "
1 2 3 4

- Run engine at idle for 30 seconds and check specifications.

If the diagnosis is initiated by the ECM, the display changes from "Test OFF" to "Test ON" in display field 4.
- Let engine continue to run at idle until specified value "Syst. OK" is indicated in display field 4.

Display Group 71:






NOTE:
- If display field 4 changes from "Test ON" to "Test OFF" and "Abort" appears in display field 2, repeat the diagnosis of fuel tank leak detection. Shut the engine off, start the engine again and repeat the leak detection test.
- When repeating the test it can take up to approx. 60 seconds before the display in display field 4 switches from "Test OFF" to "Test ON".

If "SYST. n.OK" is indicated in display field 4:
- Check DTC memory.

If the specified value "Syst. OK" is indicated in display field 4:
- Press -C- button.

Step 9: Secondary Air Injection (AIR) system diagnosis

Indicated on display

Basic Setting HELP
Input display group number XXX

- Press buttons -0-, -7- and -7- to input display group number 77 (077), and press -Q- button to confirm input.

Indicated on display (1-4 = display fields)

System in Basic Setting 77 "
1 2 3 4

If the diagnosis is initiated by the ECM, the display changes from "Test OFF" to "Test ON" in displayfield 4.
- Let engine continue to run at idle until specified value "Syst. OK" is indicated in display field 4.

Display Group 77:






If "SYST. n.OK" is indicated in display field 4:
- Check DTC memory.

If the specified value "Syst. OK" is indicated in display field 4:
- Press -> button.

Indicated on display

Rapid data transfer HELP
Select function XX

- Press buttons -0- and -6- to select "End Output" function 06, and press -Q- button to confirm input.

Step 10: Check readiness code
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