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.
- Coolant temperature at least 80 degree C, see display group 004, display zone 3.
Important: Warm up engine by means of a road test.
- Engine control module version checked from scan tool connecting and initial checks. 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". Connecting VAS 5051 Scan Tool
Ignition must be switched on.
Display on VAS5051:
- Under -1 - select diagnostic function "02 - Check DTC memory".
Display on VAS5051:
1 - Contents of DTC memory:
- 0 Malfunctions recognized
or
- X Malfunctions recognized
2 - DTC
- DTC code
- DTC location
- DTC type
If a malfunction 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
- DTC memory erased
2 - NOTE:
Should the function be carried out?
NOTE: Data will be erased!
- Press "OK"button in display -2-.
- Press <- button.
- Perform next operation.
Operation 3: Adaptation of 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: Adaptation of the 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: Instruction now says: "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 (O2S) 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 sooner.
- The "heated oxygen sensor (HO2S) status" indicates the condition of the oxygen sensor (O2S) control and the heated oxygen sensors (HO2S).
Display Group 030:
Significance of last 3-digits in readout of 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 heated oxygen sensor (HO2S) aging before catalytic converter
Display on VAS5051:
1 - Enter display group
max. input value = 255
- Enter "197" for "display group number 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 indication in display fields -2- and -4-.
Display Group 197:
If specified values "B1-S1 OK"and"B2-S1 OK" are obtained:
- Press <- button.
Operation 7: Diagnosis of heated oxygen sensor (HO2S) condition 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.
- Perform next operation.
Operation 9: Diagnosis of tank seal and oxygen sensor interchange recognition behind catalytic converter
Test conditions
For ECM up to Part No. 8EO 909 559D, software version D0003:
- Engine running at idling speed
For ECM Part No. 8EO 909 559D, from software version D0004 and ECM 8EO 909 559E, from software version D0001:
- Accelerator and brake pedals fully pressed simultaneously and held in this position until a test result if 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 heated oxygen sensor (HO2S) 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).
CAUTION: Test procedure cannot continue successfully without this brief acceleration!
- Perform next operation.
Operation 12: Diagnosis of Secondary Air Injection (AIR) 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 accelerator 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: Read readiness code
- Read readiness code. Readiness Code Reading