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.
Operation 1: Checking Diagnostic Trouble Code (DTC) memory
Conditions
- Engine stopped, ignition switched on
- Connect vehicle diagnostic, testing and information system VAS 5051. Refer to VAS 5051 vehicle diagnostic, testing and information system, connecting and selecting functions 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 ← 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".
Display on VAS 5051:
- 1 - No display (before erasing)
or
- Diagnostic Trouble Code memory erased
2 - Is the function to be carried out?
Note: Data will be erased!
- Press "OK" button in display -2-.
- Press ← 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-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 060: Adaptation of Throttle Valve Control Module | ||||
| Display | xx % | xx % | x | --- |
| Display | Angle sensor -1- for throttle drive | Angle sensor -2- for throttle drive | Adaptation stage counter | Adaptation status |
| Range | 0...8 | ADP process running ADP OK ERROR |
||
| Specified value | 3...93% | 97...3% | 8 | ADP OK |
| The adaptation stage counter reaches the number 8 after adaptation (some numbers may also be skipped) | If "ERROR" is displayed: check DTC memory. Refer to Diagnostic Trouble Code (DTC) memory, checking If specified value is not obtained: Note: Refer to The control module can abort adaptation for the following reasons: |
|||
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 ← button and perform next operation.
Operation 4: Adapting kick-down function1)
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.
- Fully depress accelerator pedal beyond kick-down point and keep it pressed.
- Check indication in display field -4-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 063: Adaptation of kickdown function | ||||
| Display | xx % | xx % | Kick down | --- |
| Display | Throttle Position (TP) Sensor 1 | Adapted kick-down value for Throttle Position (TP) Sensor 1 | Kick down | Adaptation status |
| Range | Kick down | Starting ADP process running ADP OK ERROR |
||
| Specified value | 79...94% | 79...94% | Kick down | ADP OK |
| If "ERROR" is displayed: Check Diagnostic Trouble Code (DTC) memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | ||||
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 ← button then perform next operation.
Operation 5: Checking operating status of oxygen sensor control
- Start engine (for vehicles with manual transmission: press clutch pedal).
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-.
- 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).
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 030: Oxygen sensor status | ||||
| Display | X X X | X X X | ||
| Display | Oxygen sensor status, bank 1, sensor 1 | Oxygen sensor status, bank 2, sensor 1 | ||
| Range | 0 = off 1 = on |
0 = off 1 = on |
||
| Specified value | 1 1 1 | 1 1 0 | ||
| Significance of 3-digit readout of display group 030 | ||||
| X | X | X | Display zones 1 and 2: | |
| X | Oxygen sensor control 0 = not active; 1 = active | |||
| X | Oxygen sensor condition: 0 = not active; 1 = active | |||
| X | Condition of oxygen sensor heating: 0 = not active; 1 = active | |||
- 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 ← 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-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 107: Diagnosis, oxygen sensor control system (bank 1, sensor 1) | ||||
| Display | xxxx rpm | x.x % | --- | |
| Display | Engine speed | Oxygen sensor control bank 1, sensor 1 | Diagnosis status | |
| Range | Test OFF Test ON Syst. OK Syst. NOK |
|||
| Specified value | 700...860 rpm | -8...8% | Syst. OK | |
| If "Syst. NOK" is displayed: Check DTC memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | ||||
If specification "Syst. OK" is obtained:
- Press ← button.
- Abruptly floor accelerator pedal and release again (brief burst of throttle). 3000 rpm, then perform next operation.
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-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 034: Diagnosis, oxygen sensor aging (bank 1, sensor 1) | ||||
| Display | xxxx rpm | xxx ° C | x.x | --- |
| Display | Engine speed | Exhaust gas temperature | Dynamics factor | Diagnosis status |
| Range | Test OFF Test ON B1-P1 OK B1-P1 NOK |
|||
| Specified value | approx. 2300 rpm | Above 350 ° C | 0.5...2.5 | B1-P1 OK |
| If "B1-P1 NOK" is displayed: Check Diagnostic Trouble Code (DTC) memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | ||||
If specification "B1-P1 OK" is obtained:
- Press ← 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-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 036: Oxygen sensor condition (bank 1, sensor 2) | ||||
| Display | x.xxx V | --- | ||
| Display | Oxygen sensor voltage, bank 1, sensor 2 | Diagnosis status | ||
| Range | Test OFF Test ON B1-P2 OK B1-P2 NOK |
|||
| Specified value | 0.100...0.950 volts | B1-P2 OK | ||
| If "B1-P2 NOK" is displayed: Check Diagnostic Trouble Code (DTC) memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | ||||
If specification "B1-P2 OK" is obtained:
- Press ← 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-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 037: Diagnosis, oxygen sensor control system (bank 1, sensor 2) | ||||
| Display | xxx % | x.xxx V | x.xx | --- |
| Display | Load | Oxygen sensor voltage, bank 1, sensor 2 | Oxygen sensor correction value between bank 1, sensor 1 and bank 1, sensor 2 | Diagnosis status |
| Range | Test OFF Test ON Syst. OK Syst. NOK |
|||
| Specified value | 13...45% | 0.100...0.950 volts | -0.02...0.02 | Syst. OK |
| If "Syst. NOK" is displayed: Check Diagnostic Trouble Code (DTC) memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | ||||
If specification "Syst. OK" is obtained:
- Press ← 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-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 043: Diagnosis, oxygen sensor aging (bank 1, sensor 2) | ||||
| Display | xxxx rpm | xxx ° C | x.xxx V | --- |
| Display | Engine speed | Exhaust gas temperature | Oxygen sensor (O2S) voltage, bank 1, sensor 2 | Diagnosis status |
| Range | Test OFF Test ON B1-P2 OK B1-P2 NOK |
|||
| Specified value | approx. 2300 rpm | Above 350 ° C | 0.100...0.950 volts | B1-P2 OK |
| If "B1-S2 NOK" is displayed: Check Diagnostic Trouble Code (DTC) memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | ||||
If specification "B1-P2 OK" is obtained:
- Press ← 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-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 046: Catalytic converter diagnosis (bank 1) | ||||
| Display | xxxx rpm | xxx ° C | x.xx | --- |
| Display | Engine speed | Exhaust gas temperature | Measurement Catalytic conversion |
Diagnosis status |
| Range | Test OFF Test ON Cat. B1 OK Cat. B1 NOK |
|||
| Specified value | approx. 2000 rpm | 550...700 ° C | Higher than 1.0 | Cat. B1 OK |
| As long as exhaust gas temperature is not within specified range test is not initiated. Increase or decrease speed, as necessary, leave basic setting to do so | If "Cat. B1 NOK" is displayed: Check Diagnostic Trouble Code (DTC) memory. Refer to Diagnostic Trouble Code (DTC) memory, checking . If no DTC is stored, replace the Three Way Catalytic Converter (TWC) | |||
If specification "Cat. B1 OK" is obtained:
- Press ← 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-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 070: Diagnosis of Evaporative Emission (EVAP) Canister Purge Regulator valve | ||||
| Display | xx % | xx % | --- | |
| Display | Degree of opening of Evaporative Emission (EVAP) Canister Purge Regulator valve | Oxygen sensor control Mean value |
Diagnosis status | |
| Range | Test OFF Test ON FTBV OK FTBV NOK Cancel |
|||
| Specified value | 0...99% | < or = -7% or > or = 7% |
FTBV OK | |
| If "EVAP NOK" is displayed: Check DTC memory. Refer to Diagnostic Trouble Code (DTC) memory, checking . Check EVAP Canister Purge Regulator valve -N80-. Refer to Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-, checking | ||||
If specification "EVAP OK" is obtained:
- Press ← 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-.
- 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-.
| Display fields | ||||
| 1 | 2 | 3 | 4 | |
| Display group 191: Tank seal and Secondary Air Injection (AIR) system (Bank 1) diagnostic | ||||
| Display | --- | --- | xx % | --- |
| Indicated | Leak detection result | Diagnostic condition | Relative air mass bank 1, Secondary Air Injection (AIR) system | Diagnostic condition |
| Functional range | Test OFF Test ON System OK System not OK |
Test OFF Test ON System OK System not OK |
||
| Specified value | System OK | More than -20% | System OK | |
| Note | If "System not OK" is displayed: Check DTC memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | If "System not OK" is displayed: Check DTC memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | ||
If specified values "Syst. OK" are obtained:
- Click on ← button
- Perform next work step.
Operation 14: Read readiness code
- Read readiness code. Refer to Readiness code, reading .