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Readiness Code, Generating



Special tools and workshop equipment required

- Engine speed controller V.A.G 1788/10

Test conditions

- Engine off
- Electrical consumers switched off (coolant fan must not run during the test).
- Coolant temperature at least 80 degrees C.

Operation 1: Checking DTC memory

- Connect vehicle diagnostic, testing and information system VAS 5051 or V.A.G 1551 Scan Tool and select engine electronics control unit with "Address word" 01. Ignition must be switched on.
Connecting VAS 5051 Scan Tool
[1][2]Scan Tool Connecting and Initial Checks

Indicated on display


Rapid data transfer HELP
Select function XX


- Enter "02" for function "Check DTC memory" and confirm entry with Q key.

The display shows the number of stored DTCs or "No DTC detected!"

If a DTC is stored:

- Correct malfunction and erase DTC memory. Perform a road test and check DTC memory again to check.

If no DTC is stored:
- Press key.

Operation 2: Erase DTC memory

- Ignition switched on

Indicated on display


Rapid data transfer HELP
Select function XX


- Enter "05" for function "Erase DTC memory" and confirm entry with Q key.

NOTE: The readiness code is reset when the DTC memory is erased and must therefore be reproduced.

Indicated on display


Rapid data transfer ->
DTC memory is erased

- Press ->key.

The readiness code can be generated in two ways:

- When driving with varying loads the exhaust relevant tests are initiated by the control module and the readiness code generates itself.

or

- Generate the readiness code as follows.

Operation 3: Diagnosis of fuel tank breather valves (not in all S6 models)

Test conditions
- Engine idling
- Coolant temperature greater than 85 degrees C (display group 4, display zone 3)

Indicated on display


Rapid data transfer HELP
Select function XX


- Press keys 0 and 4 for function "Basic Setting" and confirm entry by pressing the Q key.

Indicated on display


Initiate basic setting Q
Enter display group number XXX


- Enter "070" for "display group number 070" and confirm entry with Q key.

Display readout


System in basic setting 70 ->
1 2 3 4


- Check specification in display zone 4:


Display Group 070:






Note on display zone 3:
A display only occurs when the diagnostic result occurred not due to a deviation of the oxygen sensor control (e.g. oxygen sensor 1 from EVAP canister) but due to a deviation of the idling controller within a certain tolerance range. Otherwise display zone 3 remains empty.

If specification "FTBV OK" is attained:
- Press C key.

Operation 4: Diagnosis of fuel supply system
- Engine idling
- Oxygen sensor control active

Indicated on display


Initiate basic setting Q
Enter display group number XXX


- Enter "107" for "display group number 107" and confirm entry with Q key.

Display readout


System in basic setting 107 ->
1 2 3 4


- Check specification in display zone 4:


Display Group 107:






If specified value in display zone 4 "Syst OK" is attained:
- Press C key.

Operation 5: Checking oxygen sensor heater

Indicated on display


Initiate basic setting Q
Enter display group number XXX


- Enter "041" for "display group number 041" and confirm entry with Q key.

Display readout


System in basic setting 41 ->
1 2 3 4

- Check specified values in display zones 1 and 3:

NOTE: By increasing the engine speed the achieving of the specified values can be accelerated.


Display Group 41:






- Press C key.
- Press keys 0, 4 and 2 for "display group number 42" and confirm entry with Q key.


Display Group 42:






- Press C key.

Operation 6: Diagnosis of oxygen sensor aging before catalytic converter

Test conditions
- Increase engine speed until exhaust temperature 200 degrees C display zone 2 has been reached.

Indicated on display


Initiate basic setting Q
Enter display group number XXX


- Enter "034" for "display group number 034" and confirm entry with Q key.

Display readout


System in basic setting 34 ->
1 2 3 4

- Check specification in display zone 4:


Display Group 034:






If the specified value in display zone 4 "B1-P1 OK" is attained:

- Press C key.
- Press keys 0, 3 and 5 for "display group number 35" and confirm entry with Q key.


Display Group 035:






If the specified value in display zone 4 "B2-P1 OK" is attained:
- Press C key.

Operation 7: Diagnosis of oxygen sensor condition behind catalytic converter.

- Engine idling

Indicated on display


Initiate basic setting Q
Enter display group number XXX


- Enter "036" for "display group number 036" and confirm entry with Q key.

Display readout:


System in basic setting 36 ->
1 2 3 4


- Check specified values in display zones 2 and 4.


Display Group 036:






If the specified value in
Display zone 2 "B1-P2 OK" and in
Display zone 4 "B2-P2 OK" is achieved:
- Press C key.

Operation 8: Diagnosis, oxygen sensor control system

- Engine idling

Indicated on display


Initiate basic setting Q
Enter display group number XXX


- Enter "037" for "display group number 037" and confirm entry with Q key.

Display readout


System in basic setting 37 ->
1 2 3 4


- Check specification in display zone 4:


Display Group 037:






If specified value in display zone 4 "Syst OK" is attained:
- Press C key.
- Press keys 0, 3 and 8 for "display group number 38" and confirm entry with Q key.


Display Group 038:






If the specified value in display zone 4 "Syst OK" is attained:
- Press C key.

Operation 9: Catalytic converter diagnosis

Indicated on display


Initiate basic setting Q
Enter display group number XXX


- Enter "046" for "display group number 046" and confirm entry with Q key.

Display readout


System in basic setting 46 ->
1 2 3 4


Increase engine speed to approx. 3000 rpm until the exhaust temperature 550 degree C (display zone 2) is reached, and then leave engine idling.

- Check specification in display zone 4:

NOTE: The test duration for the catalytic converter diagnosis is approx. 60 seconds.


Display Group 046:






If the specified value in display zone 4 "Cat B1 OK" is attained:
- Press C key.
- Press keys 0, 4 and 7 for "display group number 47" and confirm entry with Q key.


Display Group 047:






If the specified value in display zone 4 "Cat B2 OK" is attained:
- Press C key.

Operation 10: Diagnosis of secondary air system

- Increase engine speed to approx. 1800...2400 rpm and use speed adjuster V.A.G 1788/10 to keep the engine speed.

Indicated on display


Initiate basic setting Q
Enter display group number XXX


- Enter "077" for "display group number 077" and confirm entry with Q key.

Display readout

System in basic setting 77 ->
1 2 3 4

- Check specification in display zone 4:

NOTE: Duration of test of catalytic converter diagnosis is approx. 60 seconds.


Display Group 077:






If specified value in display zone 4 "Syst OK" is attained:
- Press C key.
- Press keys 0, 7 and 8 for "display group number 78" and confirm entry with Q key.


Display 078:






If specified value in display zone 4 "Syst OK" is attained:
- Press key.

Operation 11: Reading readiness code

- Read readiness code (for control reasons) again.
Readiness Code Reading
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