Display Group 030 - 099
Display group overview with test table, Continued
Display group 030 (EVAP system diagnosis)
NOTE:
- Display group 030 is only considered on vehicles with sensor for EVAP canister -G172-.
- If the value of the EVAP throughput diagnosis is not set to "0" in display group 029, display field 1 during regeneration of the readiness code, and/or there is a malfunction in DTC memory that relates to the EVAP system, display group 030 is used to carry out a selective diagnosis.
- Since the EVAP system is automatically shut off during "Basic Setting" function 04, display group 030 can only be evaluated using "Read Measuring Value Block" function 08.
- When diagnostic conditions are fulfilled, the Engine Control Module (ECM) checks the EVAP system at each start with the help of the sensor for EVAP canister -G172-. The pressure between the EVAP canister and EVAP canister purge regulator valve is measured with the sensor for EVAP canister -G172-.
- The diagnostic conditions are only fulfilled during a drive of approx. 1-1/2 to 5 minutes at 80-100 km/h (50-63 mph) with manual transmission in 4th or 5th gear, or automatic transmission selector lever in "D" position, preferably in 4th gear. If the diagnostic conditions are fulfilled, the diagnosis is active. To get the diagnosis results, you have to drive approx. 1-1/2 to 5 minutes under the diagnostic conditions, while the pressure has to be measured with closed EVAP canister purge regulator valve. First, the pressure must be measured with the valve closed. You can get the valve to close most easily by having a preceding deceleration fuel shut-off. If there are problems in shutting the EVAP canister purge regulator valve by deceleration fuel shut-off, it can also be shut by running display group 030 in "Basic Setting" function 04. Then the pressure has to be measured again in "Read Measuring Value Block" function 08 with valve fully open.
- The diagnosis is recognized as OK if the EVAP system low pressure measured in display field 1 is greater than the actual calculated EVAP system minimum low pressure in display field 2.
- If the EVAP system is recognized as OK during the first diagnosis, the diagnosis is discontinued. If the EVAP system is recognized as not OK, the EVAP canister throughput test is continued.
- If the EVAP system throughput diagnosis is to be carried out selectively and/or after a diagnosis, shut the engine off and start again.
NOTE ON DISPLAY FIELD 2:
An under pressure calculated from the momentary throughput of the Mass Air Flow (MAF) sensor (intake air mass) is displayed.
NOTE ON DISPLAY FIELD 4:
0 1 X X X = Diagnosis carried out, diagnosis OK
1 0 X X X = Diagnosis carried out, malfunction recognized, diagnosis is continued
The display positions marked with X do not have to be fulfilled to evaluate the diagnostic status and/or result.
Display group 031 (Operating conditions when combustion misfiring is recognized):
NOTE:
- If the malfunction "Combustion misfiring recognized" and "Cyl. X Combustion misfiring recognized" are stored in DTC memory, display groups 031, 037, 036 and 039 are used to carry out a selective diagnosis.
- Display group 031 shows the operating conditions that are present at the moment the malfunction is recognized. However the operating conditions are only displayed if combustion misfiring is recognized by the Engine Control Module (ECM) and stored in DTC memory. If there is more combustion misfiring that has to be displayed, the operating conditions of the most recently recognized combustion misfiring is displayed.
- If the malfunction "Combustion misfiring" is stored in the DTC memory, at the same time a counter is set to the value of "40". This counter is displayed under display field 4 when display group 029 is called. If combustion misfiring is no longer recognized during the next 40 warm-up phases, the malfunctions in DTC memory and the operating conditions are erased.
Display Group 031:
Display group 032 [Longest and shortest flank rise and flank fall time (response time) of the voltage signal for bank 1 heated oxygen sensor 1]
Display group 033 [Longest and shortest flank rise and flank fall time (response time) of the voltage signal for bank 2 heated oxygen sensor 2]
Display group 034 [Number of flank rise and flank fall tests]
NOTE ON DISPLAY GROUP 032, 033 AND 034:
- If the value of the heated oxygen sensor diagnosis is not set to "0" in display group 029, display field 1 during regeneration of the readiness code, and/or there is a malfunction in the DTC memory that relates to the heated oxygen sensors, display groups 032, 033 and 034, as well as display groups 042 and 043 are used to carry out a selective diagnosis.
- The Engine Control Module (ECM) checks the flank rise and/or flank fall time (response time) of the voltage signal for the heated oxygen sensors in front of three way catalytic converter after every start with diagnostic conditions fulfilled See display group 042.
- The display values for display group 034 are incremented with each diagnosis that is carried out, whether the diagnosis is recognized as OK or not OK. If the flank rise and/or flank fall time is recognized as OK during the first diagnosis, the display values are increased by the value "1" and the diagnosis is discontinued. If the limit values (flank rise time 90 ms/flank fall time 85 ms) are exceeded, the diagnosis is recognized as not OK. The flank rise and/or fall times now continue to be checked, whereby the display values are incremented with each additional diagnosis. However, the limit values can also be exceeded because combustion misfiring is recognized. In this case, the malfunction "Bank X probe Y signal too slow" is not stored in DTC memory, but" Cyl. X Combustion misfiring recognized" is stored.
- Display groups 032 and 033 show the highest and lowest flank rise and/or flank fall time for all tests carried out (number of tests See display group 034).
- If during one of the next tests, a higher or lower diagnosis time is recognized, the current value is overwritten. With diagnostic conditions fulfilled, display group 043 shows the current flank rise and flank fall times. After diagnosis is ended, the diagnosis times shown are those that were recognized at the last diagnosis that was carried out.
- The display values are only reset by erasing the DTC memory. Selective observation times can be defined by resetting the display values.
Display group 032:
Display group 033:
Display group 034:
Display group 035 (Three way catalytic converter diagnosis, bank 1)
Display group 036 (Three way catalytic converter diagnosis, bank 2)
NOTE ON DISPLAY GROUPS 035 AND 036:
- If the value of the three way catalytic converter diagnosis is not set to "0" in display group 029, display field 1 during regeneration of the readiness code and/or there is a malfunction in DTC memory that relates to the three way catalytic converter display groups 035, 036 and 044 are used to carry out a selective diagnosis.
- At each start, when the diagnostic conditions are fulfilled ( display group 044) the Engine Control Module (ECM) checks the deterioration rate of the three way catalytic converter by the heated oxygen sensors in front of and behind the three way catalytic converter.
- Display fields 1 and 2 display the largest and smallest rate of deterioration of all the diagnoses carried out. If a higher or lower rate of deterioration is recognized at the next diagnosis, the current value is overwritten.
- The number of three way catalytic converter diagnoses (display field 3) is incremented each time a diagnosis is carded out, no matter whether the diagnosis is considered OK or not OK.
- If the rate of deterioration is recognized as OK during the first diagnosis, the number of three way catalytic converter diagnoses is increased by the value of "1" and the diagnosis is discontinued.
- If the limit value of 50% is exceeded, the diagnosis is recognized as not OK. In this case, the rate of deterioration continues to be checked, while the number of three way catalytic converter diagnoses is incremented with each additional diagnosis.
- Display field 4 shows the current rate of deterioration recognized at the last diagnosis.
- The display values are only reset by erasing the DTC memory. Selective observation time periods can be defined by resetting the display values.
Display group 035:
Display group 036:
Display group 037 (Sensor wheel learning value)
NOTE:
- In order to be able to monitor and/or record combustion misfiring, a sensor wheel is necessary. The flywheel (starter ring gear) is used as the sensor wheel. The flywheel is checked for mechanical damage after each start, i.e. specified tolerances must not be exceeded.
- Small malfunctions in the flywheel (e.g. teeth worn) are compensated by learning values. If greater damage is recognized, the malfunction "engine speed sensor wheel tooth error recognized" is stored in the DTC memory.
- The sensor wheel is tested during a deceleration fuel shut-off in the engine speed range from 2200-4000 RPM. In order to get a result, the length of the deceleration fuel shut off must be approx. 10 sec.
Display group 037:
Note On Display Field 1:
Display group 038 (Current data on combustion misfiring recognition)
NOTE:
- If the malfunctions "Combustion misfiring recognized" and "Cyl. X Combustion misfiring recognized"are stored in DTC memory, display groups 031, 037, 038 and 039 are used to carry out a selective diagnosis.
- Using display group 038, after a repair you can drive again in the load and engine speed range that was displayed in display group 031 as the combustion misfiring range and evaluated again.
Display group 038:
NOTE ON DISPLAY FIELD 4:
Value "0" = Cylinder without combustion misfiring
Value "1" = Cylinder with combustion misfiring
Display group 039 (Statistical data on combustion misfiring recognition)
NOTE:
- Combustion misfiring recognition always occurs in relation to 1000 RPM(1000th revolution interval).
- The display values are reset only be erasing DTC memory. Selected observation time periods can be defined by resetting the display values.
Display group 039:
NOTE ON DISPLAY FIELD 2:
The display shows the number of "1000th revolution intervals" in which 30 or more than 30 instances of combustion misfiring were recognized.
NOTE ON DISPLAY FIELD 3:
The display shows the number of "1000th revolution intervals" in which 5 or more than 5 instances of combustion misfiring were recognized.
NOTE ON DISPLAY FIELD 4:
Value "0" = Cylinder without combustion misfiring
Value "1" = Cylinder with combustion misfiring
Display group 040 (Heating current of oxygen sensors in front of and behind three way catalytic converter)
Display group 040:
NOTE:
- The current values specified apply only at when battery positive voltage (B+) is 12-14 volts See display group 001, display field 4.
- The heating of the heated oxygen sensors in front of the three way catalytic converter is switched on with the fuel pump relay, i.e. immediately at engine start.
- The heating of the heated oxygen sensors behind the three way catalytic converter is not switched on immediately at engine start, but only when the calculated exhaust gas temperature in the three way catalytic converter exceeds 308 °C (586 °F) See display group 044, display field 2. In order to reach an exhaust gas temperature of 308 °C (586 °F) in the three way catalytic converter after a cold start, the car must be driven about 20 sec. with an increased engine speed of 2500 RPM.
Display group 041 (Voltage signal of oxygen sensors in front of and behind three way catalytic converter)
Display group 041:
NOTE ON DISPLAY FIELD 3 AND 4:
- The voltage signals of bank 1 heated oxygen sensor 2 and/or bank 2 heated oxygen sensor 2 should not be evaluated until at least 50 sec. after the oxygen sensor heating is switched on See display group 040.
- With cold engine and ignition on, a voltage signal of 0.400 volts is displayed in all four display fields. With very hot engine and ignition on, a signal of 0.000 volts is displayed in display field 3 and 4.
- The voltage signal of the heated oxygen sensors behind the three way catalytic converter must lie between about 0.5 volts and 0.6 volts with a three way catalytic converter with sufficient effect (conversion). During deceleration fuel shut off, the voltage signal must be less than 0.1 volts constantly. During operation with wide open throttle enrichment, the voltage signal must be greater than 0.6 volts.
- If there is wide open throttle (signal voltage during wide open throttle enrichment greater than 0.6 volts) with a new three way catalytic converter, distance driven less than 5,000 km (3,000 mi.) after a preceding deceleration fuel shut off (signal voltage less than 0.1 volts), the transition from low to high voltage can be delayed up to 10 seconds. If acceleration is uniform after a preceding deceleration fuel shut off, the transition from low to high voltage is delayed up to 3 minutes.
Display group 042 [Diagnostic conditions for diagnosis of the flank rise and/or flank fall time (response time) of the voltage signal of heated oxygen sensors in front of three way catalytic converters]
NOTE:
- If the value of the oxygen sensor diagnosis is not set to "0" in display group 029, display field 1 during regeneration of the readiness code and/or there is a malfunction in DTC memory that relates to the oxygen sensor display group 042 can be used to set up the diagnostic conditions (display fields 3 and 4) and the diagnostic result (display field 2) can be read.
- If the diagnostic conditions are fulfilled, the Engine Control Module (ECM) checks the flank rise and/or flank fall time (response time) of the voltage signal of the heated oxygen sensors in front of the three way catalytic converters at each start, which is displayed each time display groups 032, 033, 034 and 43 are displayed.
- The diagnostic conditions are only fulfilled during a trip of approx. 1-1/2 to 5 minutes at 80-100 km/h (50-63 mph) with manual transmission in 4th or 5th gear or automatic transmission selector lever in "D" position, preferably in 4th gear. If the diagnostic conditions are fulfilled, diagnosis is active. In order to get a diagnosis result, you have to drive approx. 1-1/2 to 5 minutes under diagnostic conditions.
- If a malfunction is stored in DTC memory, which affects diagnostic conditions 1 and 2, the diagnostic conditions can not be achieved. In this case repair the malfunction See "DTC memory, checking and erasing"
Erasing DTC Memory (Function 05)
Check DTC Memory (Function 02)
- If a malfunction is stored that involves the heated oxygen sensors in front of three way catalytic converters, the diagnostic conditions can be achieved, but the diagnosis result can not be OK.
- If the flank rise and flank fall time is recognized as OK during the first diagnosis, the diagnosis is discontinued. If the times are recognized as not OK, the diagnosis of the flank rise and/or flank fall time is continued. If the diagnosis will be repeated selectively or after an OK diagnosis, switch engine off and restart.
Display group 042:
NOTE ON DISPLAY FIELD 2:
If after diagnosis all 8 displays are "1" and the engine is stopped and started again, display values 1 and 2 are reset to "0" and values 3 to 8 remain at "1." If during the trip diagnostic conditions (display fields 3 and 4) are achieved, display values 1 and 2 are set to "1 (diagnosis active) and display values 3 to 8 are set to "0".
Value "0": Diagnosis not active and/or diagnosis not finished and/or diagnosis result not OK
Value "1": Diagnosis active and/or diagnosis finished (whether OK or not OK) and/or diagnosis result OK
NOTE ON DISPLAY FIELD 3 AND 4:
Value "0" = Diagnosis condition not fulfilled
Value "1" = Diagnosis condition fulfilled
Display group 043 [Current flank rise and/or flank fall time (response time) of voltage signal of heated oxygen sensors in front of three way catalytic converters]
NOTE:
- When diagnostic conditions are fulfilled ( display group 042) display group 043 shows the current flank rise and/or flank fall times. After diagnosis is ended, the diagnostic times shown are those that were recognized when the most recent diagnosis was carried out.
- If the limit values (flank rise time 90 ms/flank fall time 85 ms) are exceeded, the diagnosis is recognized as not OK. The flank rise and/or flank fall times now continue to be checked, while the display values in display group 034 are incremented with each additional test. However the limit values can also be exceeded because of combustion misfiring being recognized. In this case, the malfunction "Bank X probe Y signal too slow" is not stored in DTC memory, but "Cyl. X Combustion misfiring recognized" is stored.
Display group 043:
Display group 044 (Diagnostic conditions for three way catalytic converter diagnosis, bank 1 and bank 2)
NOTE:
- When the diagnostic conditions are fulfilled (display fields 3 and 4) by using the heated oxygen sensors in front of and behind the three way catalytic converter at each start the Engine Control Module (ECM) carries out a diagnosis of the three way catalytic converter. During this diagnosis, the deterioration rate of the three way catalytic converter is determined. The deterioration rate of the three way catalytic converter is displayed when display groups 035 and 036 are displayed. However this diagnosis is "cross-blocked". That means that before the three way catalytic converter diagnosis can be evaluated, a result of the heated oxygen sensor diagnosis must be available to the Engine Control Module (ECM).
- If a malfunction is stored in DTC memory that affects the heated oxygen sensors in front of or behind the three way catalytic converter the heated oxygen sensor diagnosis can not be carried out and the three way catalytic converter diagnosis can not be evaluated.
- If in display group 029, display field 1 the value of the three way catalytic converter diagnosis is not set to "0" during regeneration of the readiness code, and/or a malfunction is stored in DTC memory that affects the three way catalytic converter display group 044 can be used to selectively call the diagnostic conditions (display fields 3 and 4).
- If in display group 029, display field 1 the value of the three way catalytic converter diagnosis and the value of the heated oxygen sensor diagnosis are not set to "0" during regeneration of the readiness code, display group 044, display field 1 can be used to determine whether the three way catalytic converter diagnosis has been carried out inside the engine control module, but the value of the three way catalytic converter diagnosis under display group 029, display field 1 can not be set to "0" because the heated oxygen sensor diagnosis has not been carried out.
- The diagnostic conditions are only achieved during a trip of approx. 1-1/2 to 5 minutes at 80-100 km/h (50-63 mph) with manual transmission in 4th or 5th gear, or automatic transmission selector lever in "D" position, preferably in 4th gear. However, the diagnostic conditions are only displayed 4 minutes after engine start, because until that time diagnosis is prohibited. If the diagnostic conditions are fulfilled, diagnosis is active. Now, obtaining a diagnostic result requires a test drive of approx. 1-1/2 to 5 min under the diagnostic conditions.
- If a malfunction is stored in DTC memory that affects diagnostic conditions 1 and 2, the diagnostic conditions can not be obtained. In this case repair the malfunction refer to "DTC memory, checking and erasing". If a malfunction is stored that involves the heated oxygen sensors in front of three way catalytic converter, the diagnostic conditions can be achieved, but the diagnosis result can not be OK.
- If the effect of the three way catalytic converter is recognized as OK during the first diagnosis, the diagnosis is discontinued. If the effect (conversion) is recognized as not OK, the three way catalytic converter diagnosis is continued. If the diagnosis will be repeated selectively and/or repeated after an OK diagnosis, stop the engine and start again.
Display group 044:
NOTE ON DISPLAY FIELD 1:
Display field 1 shows which diagnosis has been carried out or has not been carried out yet. If the three way catalytic converter diagnosis is carried out inside the engine control module, but the heated oxygen sensor diagnosis has not been carried out yet, the three way catalytic converter diagnosis is not evaluated and therefore the deterioration rate is not set in display groups 035 and 036.
Value "0" = Diagnosis carried out
Value "1" = Diagnosis not carried out
NOTE ON DISPLAY FIELD 3 AND 4:
Value "0" = Diagnosis condition not fulfilled
Value "1" = Diagnosis condition fulfilled
DISPLAY GROUP 045
NOTE:
- Display group 045 is only assigned on vehicles with tank diagnosis.
- Vehicles with EVAP system/tank diagnosis can be recognized by Diagnostic Pump for Fuel System -V144-.
Display Group 045:
DISPLAY GROUP 099
Display Group 099:
NOTE ON DISPLAY FIELD 4:
- For defined troubleshooting, the oxygen sensor control is switched off when display group 099 is selected under "Basic Setting" function 04, and switched on when display group 099 is selected under "Read Measuring Value Block" function 08. When leaving "Basic Setting" function 04, oxygen sensor control is automatically active again.
- You can switch back and forth between "Basic Setting" function 04 and "Read Measuring Value Block" function 08 by pressing buttons -4- and -8- on the VAG 1551 scan tool.