Readiness Code, Generating

Readiness Code, Generating

Requirements
- Vehicle stationary.
- Vehicles with automatic transmission: Selector lever in position P or N.
- Electrical accessories switched off (coolant fan must not run during the test).
- Air conditioning switched off.
- Engine coolant temperature (ECT) at least 80 degrees C
- Engine control module version checked. Operation 9, requires different procedures depending on ECM Part No./software version number.

NOTE: If the test result is immediately displayed as "OK" after selecting a display group during an operation, the test has already been performed and you can continue with the next operation.

Operation 1: Checking DTC memory

Test conditions
- Engine stopped, ignition switched on
- Connect vehicle diagnostic, testing and information system VAS5051 and select vehicle system "01 -Engine electronics" in selection. Ignition must be switched on.

Display on VAS5051:
- Under -1- select diagnostic function "02 - Check DTC memory".

Display on VAS5051:
1. Contents of fault memory:
- 0 Faults recognized
or
- X Faults recognized
2. Fault
- Fault code
- Fault location
- Fault type

If a fault is stored:
- Repair malfunction and erase DTC memory. Perform a road test and check DTC memory again.

If no DTC is stored:
- Press square button.
- Perform next operation.

Operation 2: Erase DTC memory

Test conditions
- Engine stopped, ignition switched on

Display on VAS5051:
- Under -1- select diagnostic function "05 - Erase DTC memory".

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

Display on VAS5051:
1. No display (before erasing
or
- DTC memory erased

2. NOTE: Should the function be carried out?

NOTE: Data will be erased!

- Press "OK"button in display -2-.
- Press square button.
- Perform next operation.

Operation 3: Adapting the throttle valve control module to the engine control module

Test conditions
- Engine stopped, ignition switched on

Display on VAS5051:
- Under -1- select diagnostic function "04 - Basic setting".

Display on VAS5051:
1. Enter display group
- Enter "060" for "display group number 060" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:
- Activate basic setting by pressing -A- button.
- Check indication in display fields -3- and -4-.

Note on display zone 3:
During adaptation, various digits are displayed in display zone 3 which represent the relevant adaptation status. The most crucial factor is not the way in which the adaptation stage counter (display zone 3) behaves during the adaptation process, but that the specification "ADP OK" is displayed after adaptation in display zone 4.

If specification "ADP OK" is obtained:
- Press square button.
- Perform next operation.

Operation 4: Adapting kick down function 1)
1) Only on vehicles with automatic transmission.

Test conditions
- Engine stopped, ignition switched on

Display on VAS5051:
1. Enter display group
- Enter "063" for "display group number 063" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:
- Activate basic setting by pressing -A- button.

NOTE: You will now be instructed to: "Operate kick down".

- Fully depress accelerator pedal beyond kickdown point and keep it pressed.

NOTE: During the kickdown point adaptation process, "Kickdown ADP running" is shown on the display. After successful adaptation of the kickdown point "Kickdown ADP OK" appears on the display.

- Check indication in display field -4-.

Note on display zone 4:
If "ERROR" can be displayed, if e.g. accelerator pedal is not pressed when instructed by tester, or if accelerator pedal was released while adaptation was already running but process was not yet complete. In both cases it is necessary to exit the "Basic setting" mode and restart the adaptation process.

If specification "ADP OK" is obtained:
- Press square button.
- Perform next operation.

Operation 5: Checking operating status of oxygen sensor control
- Start engine (for vehicles with manual transmission: press clutch pedal).

NOTE: If necessary, after the engine starts reselect vehicle system "01 - Engine electronics" and diagnostic function "04 - Basic setting".

Test conditions
- Engine running at idling speed

Display on VAS5051:
1. Enter display group
max. input value = 255

- Enter "030" for "display group number 030" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:
- Activate basic setting by pressing -A- button.
- Check indication in display fields -1- to -4-.

NOTE:
- By increasing the engine speed the specified values are achieved more quickly.
- The "oxygen sensor status" indicates the condition of the oxygen sensor control and the oxygen sensors.

NOTE:
- The first digit of the relevant 3-digit display (heating) fluctuates between 0 and 1.
- The oxygen sensor control for oxygen sensor behind catalytic converter (Bank 1, Sensor 2 and Bank 2, Sensor 2) is not active without engine load, i.e. the last digit of the 3-digit display is 0.

- Continue test when displays have achieved "111" in display zones 1 and 3 and "110" in display zones 2 and 4.
- Press square button.
- Perform next operation.

Operation 6: Diagnosis of oxygen sensor aging before catalytic converter

Display on VAS5051:
1. Enter display group
max. input value = 255
- Enter "197" for "display group 197" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:
- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously. Engine speed increases to approx. 2200 rpm.

Test conditions
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2200 rpm.

- Check specification in display zone -4-.
- Check indication in display fields -2- and -4-.

If specified values "B1-S1 OK" and "B2-S1 OK" are obtained:
- Press square button.

Operation 7: Diagnosis of oxygen sensor operational readiness behind catalytic converter

Display on VAS5051:
1. Enter display group Enter "193" for "display group number 193" in zone -2- and confirm entry by pressing -Q- button.

If specification "B1-S2 OK" and "B2-S2 OK" are obtained:
- Press square button.
- Perform next operation.

Operation 8: Diagnosis of tank ventilation valve -

Test requirement
- Engine running at idle.

Display on VAS5051:
1. Enter display group
- Enter "195" for "display group number 195" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:
- Activate basic setting by pressing -A- button.
- Check indication in display field -4-.

If specification "Syst. OK" is obtained:
- Press square button.

Operation 9: Diagnosis of tank seal and oxygen sensor interchange recognition behind catalytic converter

Test conditions
For ECM up to Part No. 8E0 909 559D, software version D0003:
- Engine running at idling speed
For ECM Part No. 8E0 909 559D, from software version D0004 and ECM 8E0 909 559E, from software version D0001:
- Accelerator and brake pedals fully pressed simultaneously and held in this position until a test result is displayed

Display on VAS5051:
1. Enter display group
- Enter "196" for "display group number 196" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:
- Activate basic setting by pressing -A- button.
- Check indication in display fields -1- and -4-.

NOTE:
- Tank leak diagnostic lasts longer than the oxygen sensor interchange recognition.
- In case diagnostic leak test is not started, open fuel filler cap briefly (to release pressure).

CAUTION:
- Depending on the software status of the ECM, the engine should be running in idle or with increased RPM for interchange recognition.
- If the interchange recognition does not start in display field 4, press down on the accelerator and brake pedals simultaneously. This increases the engine speed to approx. 1500 RPM and starts the test.

If the specified value "Syst. OK" is obtained:
- Press square button. Perform next operation.

Operation 10: Diagnosis of oxygen sensor aging behind catalytic converter

Display on VAS5051:
1. Enter display group
- Enter "194" for "display group number 194" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:
- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously, engine speed increases to approx. 2200 rpm.

Test conditions
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2200 rpm.

- Check indication in display fields -3- and -4-.

If the specified values "B1-S2 OK" and "B2-S2 OK" is obtained:
- Press square button.

Operation 11: Catalytic converter diagnosis

Test conditions
- Engine running at idling speed

Display on VAS5051:
1. Enter display group
- Enter "198" for "display group number 198" in zone -2- and confirm entry by pressing -Q- button.

If specified value "Cat. B1 OK" is obtained:
- Press square button.
- Depress accelerator pedal completely (swiftly) and then release it (brief acceleration to at least 4000 RPM).

WARNING: Test procedure cannot continue successfully without this brief acceleration.

- Perform next operation.

Operation 12: Diagnosis of secondary air injection system

Test conditions
- Engine running at idling speed

Display on VAS5051:
1. Enter display group
- Enter "199" for "display group number 199" in zone -2- and confirm entry by pressing -Q- button.
- Depress gas pedal completely (swiftly) two times and then release it (brief acceleration of at least 4000 RPM).

Display on VAS5051:
- Activate basic setting by pressing -A- button.

NOTE: During the diagnosis of the secondary air system the secondary air pump runs several seconds.

- Check indication in display field -4-.

If specification "Syst. OK" is obtained:
- Press square button.
- Perform next operation.

Operation 13: Reading readiness code
- Read readiness code.