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Home >> Audi >> 2001 >> A8L Quattro Sedan (4D8) V8-4.2L (AKB) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Monitors, Trips, Drive Cycles and Readiness Codes >> Audi Drive Cycle/Readiness Code >> With Manufacturer's Scan Tool >> Readiness Code, Generating

Readiness Code, Generating




Readiness Code, Generating

Required special tools and test equipment







- VAG1788/10 RPM adjuster

Requirements
- Engine off
- Electrical consumers switched off (radiator fan must NOT run during test)
- Coolant temperature min. 80 °C (185 °F)

Work step 1: Check DTC memory

- Connect Vehicle Diagnostic, Test and Information system VAS5051 or VAG1551 scan tool to vehicle and select control module for engine electronics using "address word" 01. Connecting VAS 5051 Scan Tool


The ignition is switched ON.

When indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -2- to select function "Check DTC Memory" and press -Q- button to confirm input.

Number of stored DTCs or "No DTC recognized" will be indicated on display.


X DTC recognized!


If a DTC is stored:
- Repair malfunction, erase DTC memory. Road test vehicle and then re-check DTC memory as a control measure.

If no DTC is stored:
- Press -> button.

Work step 2: Erase DTC Memory
- Ignition switched ON

When indicated on display


Rapid data transfer HELP
Select function XX


- Press button -0- and -5- to select function "Erase DTC Memory" and press -Q- button to confirm input.


NOTE: When DTC memory is erased, readiness code is reset and must therefore be re-generated.


When indicated on display


Rapid data transfer ->
DTC memory is erased


- Press -> button.

The readiness code can be generated in two methods:
- The control module executes exhaust relevant tests during driving cycles at various load conditions, therefore the readiness code is self-generated.
or
- Generate readiness code as follows.

Work step 3: Diagnostic of EVAP canister purge regulator valve

Test requirements

- Engine at idle
- Coolant temperature greater than 5 °C (display group 4, display field 3)

Indicated on display


Rapid data transfer HELP
Select function XX


- Press button -0- and -4- to select function "Basic Setting" and confirm input with -Q- button.

Indicated on display


System in Basic Setting Q
Input display group number XXX


- Press button -0-, -7- and -0- to select "display group number 070" and confirm input with -Q- button.

When indicated on display


System in Basic Setting 70 ->
1 2 3 4


- Check specified value in display field 4:







If the specified value "EVAP OK" is reached:
- Press -C- button

Work step 4: Diagnostic of tank leak test

Test requirements
- Engine at idle
- Coolant temperature greater 85 °C (Display group 4, display field 3)
- Intake air temperature less 95 °C (Display group 4, display field 4)

When indicated on display


System in Basic System Q
Input display group number XXX


- Press buttons -0-, -7- and -1- to select display group number "071" and press -Q- button to confirm input.

When indicated on display


System in Basic Setting 71 ->
1 2 3 4


During test is "Test ON" displayed in display field 4. Continue to hold test conditions until a diagnostic result is displayed in display field 4.

- Check specified value in display field 4:


NOTE: Test duration for tank leak test takes approximately 60 seconds.







If specified value in display field "System OK" is reached:

- Press -C- button.

Work step 5: Diagnostic of fuel supply system
- Engine at idle
- Oxygen sensor control active

When indicated on display


System In Basic System Q
Input display group number XXX


- Press buttons -1-, -0- and -7- to select display group number 107 and confirm with -Q- button.

When indicated on display


System in Basic Setting 107 ->
1 2 3 4


- Check specified values in display field 4.







If specified value in display "System OK" is reached:
- Press -C- button.

Work step 6: Diagnostic of Heated oxygen sensor

When indicated on display


System in Basic Setting Q
Input display group number XXX


- Press buttons -0-, -4- and -1- to select display group number 041 and confirm with -Q- button.

When indicated on display


System in Basic Setting 41 ->
1 2 3 4


- Check specified value in display field 1 and 3:


NOTE: Increasing engine speed accelerates the obtaining of specified values.







- Press -C- button.
- Press buttons -0-, -4- and -2- to select display group number 042 and confirm input with -Q- button.







- Press -C- button.

Work step 7: Diagnostic of oxygen sensor before catalytic converter

Test requirements
- Increase RPM until exhaust temperature reached 200 °C in display field 2

Indicated on display


System in Basic Setting Q
Input display group number XXX


- Press buttons -0-, -3- and -4- to select display group number 034 and confirm with -Q- button.

Indicated on display


System in Basic Setting 34 ->
1 2 3 4


- Check specified value in display field 4:







If specified value of "B1-S1 OK" is reached:
- Press -C- button.
- Press buttons -0-, -3- and -5- to select Display group number "035" and confirm with -Q- button.







If specified value of "B2-S1 OK" is reached:
- Press -C- button.

Work step 8: Diagnostic of operational readiness of oxygen sensors behind TWC

- Engine at idle

Indicated on Display


System in Basic Setting Q
Input display group number XXX


- Press buttons -0-, -3- and -6- to select display group number "036" and press -Q- button to confirm input.

Indicated on display


System in Basic Setting 36 ->
1 2 3 4


- Check specified values in display fields 2 and 4.







If the specified value in display field 2 of "B1 -S2 OK" and in display field 4 "B2-S2 OK" is reached:
- Press -C- button.

Work step 9: Diagnostic of oxygen sensor control system

- Engine at idle

Indicated on display


System in Basic Setting Q
Input display group number XXX


- Press buttons -0-, -3- and -7- to select display group numbers "037" and confirm with -Q- button.

Indicated on display


System in Basic Setting 37 ->
1 2 3 4


- Check specified value in display field 4.







If specified value of "System OK" is reached:
- Press -C- button.
- Press buttons -0-, -3- and -8- to select display group number "038" and confirm input with -Q- button.







If specified value of "System OK" is reached:
- Press -C- button.

Work step 10: Diagnostic of oxygen sensor aging behind catalytic converter
- Increase engine speed until exhaust temperature of 250 °C is reached in display field 2.

Indicated on display


System in Basic Setting Q
Input display group number XXX


- Press buttons -0-, -4- and -3- to select display group number "043" and confirm input with -Q- button.

Indicated on display


System in Basic Setting 43 ->
1 2 3 4


- Check specified value in display field 4.







If specified value of "B1-S2 OK" is reached:
- Press -C- button.
- Press buttons -0-, -4- and -4- to select display group number "044" and confirm input with -Q- button.







If specified value of "B2-S2 OK" is reached:
- Press -C- button.

Work step 11: Diagnosis of catalytic converter
- Increase engine speed to approximately 1800 - 2400/RPM
- Catalyst temperature must exceed 540 °C display field 2
- Return engine to idle. Test starts when catalyst temperature falls below 540 °C but remains above 400 °C.

Indicated on display


System in Basic Setting Q
Input display group number XXX


- Press buttons -0-, -4- and -6- to select display group number "046" and confirm input with -Q- button.

Indicated on display

System in Basic Setting 46 ->
1 2 3 4

- Check specified value in display field 4.


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







If the specified value "Cat B1 OK" is reached:
- Press -C- button
- Press buttons -0-, -4- and -7- to select display group number "047" and confirm input with -Q- button.







If the specified value "Cat B2 OK" is reached:
- Press -C- button

Work step 12: Diagnosis of Secondary Air Injection (AIR) system
- Increase engine speed to approximately: 1800 to 2400/RPM

Indicated on display


System in Basic Setting Q
Input display group number XXX


- Press buttons -0-, -7- and -7- to select display group number "077" and confirm input with -Q- button.

Indicated on display


System in Basic Setting 77 ->
1 2 3 4


- Check specified value in display field 4.


NOTE: The test duration for the secondary air injection system takes approximately 60 seconds.







If the specified value of "System OK" is reached:
- Press -C- button.
- Press buttons -0-, -7- and -8- to select display group number "078" and confirm input with -Q- button.







If the specified value of "System OK" is reached:
- Press -> button.

Work step 13: Readiness code, displaying
- Display readiness code again (measure of control).
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