Generate Readiness Code
Generate Readiness Code
Special tools and equipment
- Speed regulator VAG 1788/10
Requirements:
- Vehicle is stationary
- Electrical consumers switched off (radiator fan must not run during the test)
- Air conditioner switched off
- Coolant temperature at least 80 degrees C => Display group 004, Display zone 3.
Important Note: Run engine till warm (preferably with test drive).
NOTE: If during a work step the test result "OK" is indicated immediately after a display group was selected, the test is finalized already. Proceed with the next work step.
Work step 1: check DTC memory
Test requirement:
- Engine not running; ignition switched on.
- Connect the vehicle diagnostic, testing and information system VAS 5051, Vehicle Diagnostic, Testing and Information System VAS 5051, Connecting and Selecting Functions , and select the vehicle system "01 -Engine electronics" from the menu. When doing this the ignition should be switched on.
Display on VAS 5051:
- Select diagnosis function "02 - check DTC memory" from the menu -1-.
Display on VAS 5051:
1 - Content of DTC memory:
- 0 faults detected
or
- X faults detected
2 - Identification of fault
- DTC
- Location/cause of fault
- Type of fault
If a fault is stored:
- Rectify fault and erase DTC memory. Then take vehicle for a road test and check DTC memory once again to check for faults.
If no faults are stored:
- Press the <- button.
Work step 2: erase DTC memory
Test requirement:
- Engine not running; ignition switched on.
Display on VAS 5051:
- Select diagnosis function "05 - Erase DTC memory" from the menu -1-.
NOTE: If the DTC memory is erased, the readiness code is set back and therefore has to be regenerated.
Display on VAS 5051:
1 - No display (before erasing memory)
or
- DTC memory is erased
2 - Note: Do you now want to implement this function? (Existing data will be erased.)
- Press "OK" in menu -2-.
- Press the <- button.
Work step 3: adjust the throttle valve control part to the engine control module
Test requirement:
- Engine not running; ignition switched on.
Display on VAS 5051:
- Select the diagnosis function "04 - Basic settings" from the menu -1-.
Display on VAS 5051:
1 - Enter display group
(figures up to 255)
- Using the keypad -2-, enter "060" to select Display group 060 and confirm entry with Q button.
Display on VAS 5051:
- Check the readouts in display zones -3- and -4-.
Note on display zone 3:
During adaptation display zone 3 indicates various numbers, which represent the actual adaptation status. It is not of principal importance what the learning stage counter (display zone 3) displays during the adaptation period, but that the specification "ADP O.K." is indicated in display zone 4 after the adaptation process.
If the specification "ADP O.K." is attained:
- Proceed to the next step.
Work step 4: testing operation mode of oxygen sensor control
- Switch ignition off.
- Start the engine (depress clutch pedal on vehicles with manual transmission).
NOTE:
- If the engine is not started after adaptation of the throttle valve control module in diagnostic function "04 -basic setting", an entry into DTC memory may occur.
- If necessary, select the vehicle system "01 - Engine electronics" and diagnosis function "04 - Basic settings" again after starting the engine.
- Apply speed regulator VAG 1788/10 to the accelerator pedal and increase engine speed to 2000 RPM.
Test requirement:
- Engine running at 2000 RPM.
Display on VAS 5051:
- Press the <- button.
Display on VAS 5051:
1 - Enter display group
(max. figures up to 255)
- Using keypad -2-, enter "030" to select Display group 030 and confirm entry with Q button.
Display on VAS 5051:
- Check oxygen sensor status in display zones -1- and -2-.
NOTE: It may take a few minutes before the specified value in display field -2- is reached. If necessary, increase RPM.
- Only continue with the test when the displays have indicated "111" in display zone 1 and "110" in display zone 2 at least once.
Work step 5: diagnosis of ageing of oxygen sensor before catalytic converter
Test requirement:
- Engine still running at 2000 RPM.
Display on VAS 5051:
- Press the Up Arrow button four times to advance to Display group 034.
- Check the readout in display zone -4-.
NOTE: It may take a few minutes before a diagnosis result is obtained.
If the specification "B1-P1 O.K." is attained:
- Proceed to the next step.
Work step 6: diagnosis of condition of oxygen sensor after catalytic converter
Test requirement:
- Engine still running at 2000 RPM.
Display on VAS 5051:
- Press the <- button twice to advance to Display group 036.
- Check the readout in display zone -2-:
If the specification "B1-P2 O.K." is attained:
- Proceed to the next step.
Work step 7: diagnosis of oxygen sensor control system
Test requirement:
- Engine still running at 2000 RPM.
Display on VAS 5051:
- Press the Up Arrow button to advance to Display group 037.
- Check the readout in display zone -4-.
If the specification "SYST. O.K." is attained:
- Proceed to the next step.
Work step 8: diagnosis of ageing of oxygen sensor after catalytic converter
Test requirement:
- Engine still running at 2000 RPM.
Display on VAS 5051:
- Press the <- button.
Display on VAS 5051:
1 - Enter display group
(figures up to 255)
- Using the keypad -2-, enter "043" to select Display group 043 and confirm entry with Q button.
Display on VAS 5051:
Check the readout in display zone -4-.
If the specification "B1-P2 O.K." is attained:
- Proceed to the next step.
Work step 9: diagnosis of catalytic converter
Test requirement:
Front wheel drive vehicles:
- Engine still running at 2000 RPM.
All wheel drive vehicles:
- Increase engine speed to 2400 RPM
- Engine is running at 2400 RPM
All vehicles
Display on VAS 5051:
- Press the Up Arrow button three times to advance to Display group 046.
- Check the readouts in display zones -2- and -4-:
NOTE: The diagnostic test of the catalytic converter takes approx. 60 seconds.
If the specification "Cat B1 O.K. is attained:
- Proceed to the next step.
Work step 10: diagnosis of EVAP canister purge regulator valve
- Remove speed regulator VAG 1788/10 and run engine at idling speed.
Test requirement:
- Engine idling.
Display on VAS 5051:
- Press the <- button.
Display on VAS 5051:
1 - Enter display group
(figures up to 255)
- Using the keypad -2-, enter "070" to select Display group 070 and confirm entry with Q button.
Display on VAS 5051:
- Check the readout in display zone -4-.
NOTE: If the test does not start or if the display jumps from "Test ON" to "Test OFF", press the accelerator briefly. The test will now be repeated.
If the specification "TBV O.K." is attained:
- Proceed to the next step.
Work step 11: diagnosis of fuel tank air tightness (Leak Detection)
Test requirements:
- Engine idling.
- Fuel tank filler cap briefly opened (to release pressure)
Display on VAS 5051:
- Press the Up Arrow button to change to Display group 071.
- Check the specified value in display field -4-:
NOTE:
- Test duration is approx. 90 seconds.
- If the leak detection function is performed several times in sequence, the tank filler cap must first be opened briefly every time to release pressure.
If the specification "Syst. O.K." is attained:
- Proceed to the next step.
Work step 12: diagnosis of secondary air system
Test requirement:
- Engine idling.
NOTE: The secondary air pump runs for several seconds while the diagnosis of the secondary air system is performed.
Display on VAS 5051:
- Press the <- button.
Display on VAS 5051:
1 - Enter display group
(figures up to 255)
- Using the keypad -2-, enter "077" to select Display group 077 and confirm entry with Q key.
- Floor and release the accelerator quickly (short blip of at least 2500 RPM).
Display on VAS 5051:
- Check the readout in display zone -4-.
NOTE: The diagnostic test of the secondary air system takes approx. 60 seconds.
If the specification "SYST. O.K." is attained:
- Press the <- button.
Work step 13: reading off readiness code
- Read off the readiness code. Read Readiness Code