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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 display group 004, display zone 3). Important: Warm up engine by means of a road test.
- Engine control module version checked, from Operation 9, requires different procedures depending on ECM Part No./software version number. Connecting VAS 5051 Scan Tool

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. Connecting VAS 5051 Scan Tool

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 <- 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
- Fault memory erased

2 - NOTE:
- Should the function be carried out.
- Data will be erased!

- Press "OK" button in display -2-.
- Press <- 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-.


Display Group 060:






If specification "ADP OK" is obtained:
- Press <- 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-.


Display Group 063:






If specification "ADP OK" is obtained:
- Press <- 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.

Display Group 030:









- Continue test when displays have achieved "111" in display zones 1 and 3 and "110" in display zones 2 and 4.
- Press <- 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 "034" for "display group number 034" 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-.


Display Group 034:






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

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

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 -2- and -4-.


Display Group 193:






If specification "B1-S2 OK" and "B2-S2 OK" are obtained:
- Press <- 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-.


Display Group 195:






If specification "Syst. OK" is obtained:
- Press <- 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).


Display Group 196:






If the specified value "Syst. OK" is obtained:
- Press <- 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-.


Display Group 194:






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

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 -2- and -4-.


Display Group 198:






If specified value "Cat. B1 OK" is obtained:
- Press <- 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-.


Display Group 199:






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

Operation 13: Reading readiness code
- Read readiness code, Readiness Code Reading
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