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Readiness Code, Generating




Generating Readiness Code

Required special tools and test equipment
VAG 1551 Scan Tool (ST) with VAG 1551/3 adapter cable

Test requirements
- No malfunctions stored in DTC memory
- Engine not stopped (ignition not switched off) during test
- Vehicle not moving
- All electrical consumers switched off (coolant fan must not run during test)

Test sequence
- Connect VAG 1551/VAG 1552 Scan Tool (ST) and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with ignition switched on).[1][2]Scan Tool Connecting and Initial Checks

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.

Indicated on display


No DTC recognized
If one or more DTCs are stored:


- Repair cause of malfunction.
- Erase DTC memory.
- Stop engine, start engine again, and road test vehicle, safety precautions for road testing vehicle
- Check DTC memory again and erase.

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.

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 -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-, -6- and -0- to input display group number 60 (060), and press -Q- button to confirm input.

Indicated on display (1-4 = display fields)


Read Measuring Value Block 60 ->
1 2 3 4


- Press button -4- to select "Basic Setting" function 04 (adaptation of throttle valve control module to ECM)

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:







If "ADP.ERROR" is indicated in display field 4:
- Check DTC memory.

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

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

Step 5: Oxygen Sensor (02S) 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


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







If one of the specified values is not indicated:
- Check DTC memory.

If the specified values for display fields 1-4 are not indicated:

- Continue to hold engine speed at 1800-2200 RPM.

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







Step 6: Oxygen Sensor (02S) aging (time period)

- Press button -4- to select "Basic Setting" function 04.
- Press button -3- four times to advance to display group number 34.

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- 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.







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- 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.







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:
- Press -C- button.

Step 8: Evaporative Emissions (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.


- Start engine and let run at idle.

Indicated on display


Basic Setting HELP
Input display group number XXX


- 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

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 "EVAP OK" is indicated in display field 4.


NOTE::
If the display changes from "Test ON" to "Test OFF" during the diagnosis, briefly accelerate the engine to reset and repeat the test.







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

If the specified value "EVAP OK" is indicated in display field 4:
- Press -3- button to input display group number 71.

Indicated on display (1-4 = display fields)


Initiate basic setting 71 ->
1 2 3 4

- Start engine and let run at idle.

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.







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.

Diagnosis conditions for fuel tank leak detection:

- Intake Air Temperature (IAT) must be less than 60 |1 C (140 |1 F) -> Display group 004, display field 4. The temperature can be reduced by opening the hood. Testing and Inspection
- The throttle valve angle for vehicles with automatic transmissions must be smaller than 10 Angle Degree -> display group 003, display field 3. Testing and Inspection
- The throttle valve angle for vehicles with manual transmissions must be smaller than 10 Angle Degree -> display group 003, display field 3. Testing and Inspection


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.

Step 9: Secondary Air Injection (AIR) system diagnosis
- Start engine and let run at idle.

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 display field 4.
- Let engine continue to run at idle until specified value "Syst.OK" is indicated in display field 4.







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.

Step 10: Check readiness code
- Check readiness code. Readiness Code Reading
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