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Readiness Code, Generating



Readiness Code, Generating

Conditions
- Vehicle stationary.
- Electrical devices switched off (coolant fan must not run during test).
- Air conditioning switched off.
- Vehicles with automatic transmission: Selector lever in position P or N.

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 Diagnostic Trouble Code (DTC) memory

Conditions
- Engine stopped, ignition switched on
- Connect vehicle diagnostic, testing and information system VAS 5051 and select vehicle system "01 - Engine electronics" in selection. Ignition must be switched on.







Display on VAS 5051:
- Under -1- select diagnostic function "02 - Check Diagnostic Trouble Code (DTC) memory".







Display on VAS 5051:
1. Content of the Diagnostic Trouble Code (DTC) memory:
- 0 DTCs recognized
or
- X DTCs recognized

2. DTCs
- DTC code
- DTC location
- DTC type

If a DTC is stored:
- Repair DTC and erase Diagnostic Trouble Code (DTC) memory. Perform a road test and check DTC memory again.

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

Operation 2: Erasing Diagnostic Trouble Code (DTC) memory

Conditions
- Engine stopped, ignition switched on







Display on VAS 5051:
- Under -1- select diagnostic function "05 - Erase Diagnostic Trouble Code (DTC) memory".

NOTE: The readiness code is reset when the Diagnostic Trouble Code (DTC) memory is erased and must therefore be reproduced.







Display on VAS 5051:
1. No display (before erasing)
or
- Diagnostic Trouble Code memory erased

2. NOTE: Is the function to be carried out?

NOTE: Data will be erased.

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

Operation 3: Adapting Throttle Valve Control Module -J338- to Engine Control Module (ECM)

Conditions
- Engine stopped, ignition switched on







Display on VAS 5051:
- Under -1- select diagnostic function "04 - Basic setting".







Display on VAS 5051:
1. Enter display group

- Enter "060" for "display group number 060" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Check specifications in display zones -3- and -4-.
- 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 and perform next operation.

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

Conditions
- Engine stopped, ignition switched on







Display on VAS 5051:
1. Enter display group

- Enter "063" for "display group number 063" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.

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

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

NOTE: During the kick-down point adaptation process, "Kick-down ADP is running" is shown on the display. After successful adaptation of the kick-down point "Kick-down ADP OK" appears on the display.

- Check indication in display field -4-.







Note on display zone 4:
"ERROR" may be displayed, if e.g. accelerator pedal is not pressed immediately when instructed by tester, or if accelerator pedal was released while adaptation was already running but process was not yet complete. In both cases exit "basic setting" mode and perform adaptation again.

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

Conditions
- Engine at idle







Display on VAS 5051:
1. Enter display group

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







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Check indication in display fields -1- and -2-.

NOTE:
- By increasing the engine speed (RPM) the specified values are achieved quicker.
- The "Oxygen sensor status" indicates the condition of the oxygen sensor control and the oxygen sensor (O2S).












NOTE:
- The first digit of the 3-digit display (heating) fluctuates between 0 and 1 at certain operating points.
- The oxygen sensor control of oxygen sensor (O2S) after Three Way Catalytic Converter (TWC) (bank 1, sensor 2) is not active without engine load, i.e. the display of the 3-digit display is 0.

- Only continue with test if displays have reached "111" in display zone 1 and "110" in display zone 2 at least once.
- Press square button.
- Perform next operation.

Operation 6: Diagnosis of oxygen sensor control system before Three Way Catalytic Converter (TWC)

Conditions
- Engine at idle







Display on VAS 5051:
1. Enter display group
- Enter "107" for "display group number 107" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Check indication in display field -4-.







If specification "Syst. OK" is obtained:
- Press square button.
- Abruptly floor accelerator pedal and release again (brief burst of throttle). 3000 rpm, then perform next operation.


CAUTION: The test procedure cannot continue successfully without this brief burst of throttle.

Operation 7: Diagnosis of aging of Oxygen Sensor (O2S) before Three Way Catalytic Converter (TWC)







Display on VAS 5051:
1. Enter display group
- Enter "034" for "display group number 034" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously, engine speed increases to approx. 2300 rpm.

Conditions
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2300 rpm.
- Check indication in display field -4-.







If specification "B1-P1 OK" is obtained:
- Press square button.
- Perform next operation.

Operation 8: Diagnosis of Oxygen Sensor (O2S) condition after Three Way Catalytic Converter (TWC)

Conditions
- Engine at idle







Display on VAS 5051:
1. Enter display group
- Enter "036" for "display group number 036" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Check indication in display field -2-.







If specification "B1-P2 OK" is obtained:
- Press square button.
- Perform next operation.

Operation 9: Diagnosis of oxygen sensor control system after Three Way Catalytic Converter (TWC)

Conditions
- Engine at idle







Display on VAS 5051:
1. Enter display group
- Enter "037" for "display group number 037" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Check indication in display field -4-.







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

Operation 10: Diagnosis of Oxygen Sensor (O2S) aging after Three Way Catalytic Converter (TWC)







Display on VAS 5051:
1. Enter display group
- Enter "043" for "display group number 043" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously, engine speed increases to approx. 2300 rpm.

Conditions
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2300 rpm.
- Check indication in display field -4-.







If specification "B1-P2 OK" is obtained:
- Press square button.
- Perform next operation.

Operation 11: Three Way Catalytic Converter (TWC) diagnosis







Display on VAS 5051:
1. Enter display group
- Enter "046" for "display group number 046" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously, engine speed increases to approx. 2000 rpm.

Conditions
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2000 rpm.
- Check specifications in display zones -2- and -4-.
- Check indication in display fields -2- and -4-.







If specification "Cat. B1 OK" is obtained:
- Press square button.
- Perform next operation.

Operation 12: Diagnosis of Evaporative Emission (EVAP) Canister Purge Regulator valve -N80-

Conditions
- Engine run at idle







Display on VAS 5051:
- 1 - Enter display group
- Enter "070" for "display group number 070" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Check indication in display field -4-.







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

Operation 13: Diagnostic of tank seal and Secondary Air Injection (AIR) system Observe:
- Engine running at idle:







Display on VAS 5051:
1. Enter display group
- Select function "191" in button field -2- for "display group number 191" and press Q button to confirm input.







Display on VAS 5051:
- Activate basic setting by pressing button -A-.

NOTE:
- During diagnostic of the Secondary Air Injection (AIR) system, the Secondary Air Injection (AIR) pump will run for several seconds.
- In case diagnostic leak test is not started, open fuel filler cap briefly (to release pressure).

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







If specified values "Syst. OK" are obtained:
- Click on square button
- Perform next work step.

Operation 14: Read readiness code

Read readiness code. Readiness Code, Reading
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