Fault description
The diagnostic trouble code is logged in the ECU when the idle correction factor for the measured air mass exceeds the approved limit 0.
Condition for fault identification
Test condition
The test routine is executed continuously. However, a new correction factor is calculated only once per driving cycle, and provided that this function is enabled based on environmental conditions and the current operating point.
Voltage condition
The test routine is executed continuously. However, a new correction factor is calculated only once per driving cycle, and provided that this function is enabled based on environmental conditions and the current operating point.
The diagnostic trouble code is logged in the ECU when the load correction factor for the measured air mass exceeds the approved limit 0.
Test condition
The test routine is executed continuously. However, a new correction factor is calculated only once per driving cycle, and provided that this function is enabled based on environmental conditions and the current operating point.
Voltage condition
The test routine is executed continuously. However, a new correction factor is calculated only once per driving cycle, and provided that this function is enabled based on environmental conditions and the current operating point.
none
The DTC is logged when the mass airflow falls below the limit value 5 kg/h.
Test condition
The malfunction diagnosis proceeds when no faults are present in the mass airflow system.
Voltage condition
The malfunction diagnosis proceeds when no faults are present in the mass airflow system.
Mass airflow sensor sensor-monitoring function. The diagnostic trouble code is logged in the ECU when the period duration of the raw sensor signal exceeds 833 us.
Test condition
The test is conducted under the following conditions
- Engine RPM exceeds 590 1/min.
- No electrical faults stored for the HFM.
- Power is being supplied to the mass-airflow sensor (Terminal 15 = On).
Voltage condition
The test is conducted under the following conditions
- Engine RPM exceeds 590 1/min.
- No electrical faults stored for the HFM.
- Power is being supplied to the mass-airflow sensor (Terminal 15 = On).
Mass airflow sensor sensor-monitoring function. The diagnostic trouble code is logged in the ECU when the period duration of the raw sensor signal is less than 71 us.
Test condition
The test is conducted under the following conditions
- Engine RPM exceeds 590 1/min.
- No electrical faults stored for the HFM.
- Power is being supplied to the mass-airflow sensor (Terminal 15 = On).
Voltage condition
The test is conducted under the following conditions
- Engine RPM exceeds 590 1/min.
- No electrical faults stored for the HFM.
- Power is being supplied to the mass-airflow sensor (Terminal 15 = On).
The diagnostic trouble code is logged in the ECU when the ratio of the calculated to the measured air mass rises above a limit value based on the operating point in the program map.
Test condition
Plausibility checks on the HFM runs during coasting/on overrun and during the drift compensation learning phases. The HFM plausibility check must also be enabled.
Voltage condition
Plausibility checks on the HFM runs during coasting/on overrun and during the drift compensation learning phases. The HFM plausibility check must also be enabled.
The diagnostic trouble code is logged in the ECU when the ratio of the calculated to the measured air mass falls below a limit value based on the operating point in the program map.
Test condition
Plausibilities of the HFM runs during overrun operation or during the drift compensation learning phases. The HFM plausibility check must also be enabled.
Voltage condition
Plausibilities of the HFM runs during overrun operation or during the drift compensation learning phases. The HFM plausibility check must also be enabled.
The error is recognized when the mass-airflow sensor reports that the mass airflow signal has exceeded the maximum period duration.
Test condition
The test routine is executed when mass-airflow sensor diagnosis is not disabled and the sensor is receiving electrical power.
The test runs during each process execution.
Voltage condition
The test routine is executed when mass-airflow sensor diagnosis is not disabled and the sensor is receiving electrical power.
The test runs during each process execution.
Monitoring of adapted low-pressure EGR cooler efficiency. The diagnostic trouble code is logged when the cooler efficiency rises above the limit 0 or falls below the limit 0.
Test condition
To allow recognition of the error the model should not be in the learning phase.
The learning phase is completed once the efficiency level has been successfully adapted. The adaptation function is enabled when
- the low-pressure EGR valve's travel feedback exceeds a limit value.
- the coolant temperature is greater than 40 °C.
the error check proceeds continuously in the defined process grid.
Voltage condition
To allow recognition of the error the model should not be in the learning phase.
The learning phase is completed once the efficiency level has been successfully adapted. The adaptation function is enabled when
- the low-pressure EGR valve's travel feedback exceeds a limit value.
- the coolant temperature is greater than 40 °C.
the error check proceeds continuously in the defined process grid.
Following activation a calibration routine runs in the analog-digital converter. This DTC is logged when the calibration routine is not completed within the specified period.
Test condition
The error check runs while the control module is being initialized.
Voltage condition
The error check runs while the control module is being initialized.
Following successful calibration of the analog-digital converter the A/D converter duration is checked. The diagnostic trouble code is logged in the ECU if conversion of all channels is not completed within a specified time.
Test condition
The converter check runs as part of the control module initialization routine following calibration.
Voltage condition
The converter check runs as part of the control module initialization routine following calibration.
Following activation a calibration routine runs in the analog-digital converter. This DTC is logged when the calibration routine is not completed within the specified period.
Test condition
The error check runs while the control module is being initialized.
Voltage condition
The error check runs while the control module is being initialized.
Following successful calibration of the analog-digital converter the A/D converter duration is checked. The diagnostic trouble code is logged in the ECU if conversion of all channels is not completed within a specified time.
Test condition
The converter check runs as part of the control module initialization routine following calibration.
Voltage condition
The converter check runs as part of the control module initialization routine following calibration.
The diagnostic trouble code is logged in the ECU when the exhaust-gas recirculation system's flow rate control's positive control deviation exceeds a limit defined based on the operating point.
Test condition
The check runs every 20 ms when the specified value priority assignment is set to flow rate and no other errors related to the exhaust-gas recirculation have been detected.
Voltage condition
The check runs every 20 ms when the specified value priority assignment is set to flow rate and no other errors related to the exhaust-gas recirculation have been detected.
The diagnostic trouble code is logged in the ECU when the exhaust-gas recirculation system's positive control deviation exceeds a limit defined based on the operating point.
Test condition
The test runs every 20 ms when the exhaust-gas recirculation system is activated, the monitoring system is enabled and no other system fault is present.
The test conditions must be satisfied for at least 0 ms.
Voltage condition
The test runs every 20 ms when the exhaust-gas recirculation system is activated, the monitoring system is enabled and no other system fault is present.
The test conditions must be satisfied for at least 0 ms.
The diagnostic trouble code is logged in the ECU when the exhaust-gas recirculation system flow rate control's positive control deviation exceeds a limit defined based on the operating point.
Test condition
In normal operation the check runs every 20 ms when the specified value priority assignment is set to flow rate and no other errors related to the exhaust-gas recirculation have been detected.
Voltage condition
In normal operation the check runs every 20 ms when the specified value priority assignment is set to flow rate and no other errors related to the exhaust-gas recirculation have been detected.
The diagnostic trouble code is logged in the ECU when the exhaust-gas recirculation system's negative control deviation falls below a limit defined based on the operating point.
Test condition
The test runs every 20 ms when the exhaust-gas recirculation control system is activated, the monitoring system is enabled and no other system fault is present.
Voltage condition
The test runs every 20 ms when the exhaust-gas recirculation control system is activated, the monitoring system is enabled and no other system fault is present.
The diagnostic trouble code is logged when the defined deactivation conditions for exhaust-gas recirculation control remain in place for longer than 300000 ms after the engine is started.
Test condition
The check continues until the error is recognized or all deactivation conditions have been cancelled.
Voltage condition
The check continues until the error is recognized or all deactivation conditions have been cancelled.
The measured variables from the air-temperature sensors are checked against each other for relative plausibility. The DTC is logged when the outside temperature is implausible relative to all of the other measured values.
Test condition
The monitoring routine executes once per driving cycle in the cold-start phase.
Voltage condition
The monitoring routine executes once per driving cycle in the cold-start phase.
The measured variables from the air-temperature sensors are checked against each other for relative plausibility. The DTC is logged when the charge-air temperature is implausible relative to all other measured values.
Test condition
The monitoring routine executes once per driving cycle in the cold-start phase.
Voltage condition
The monitoring routine executes once per driving cycle in the cold-start phase.
The measured variables from the air-temperature sensors are checked against each other for relative plausibility. The DTC is logged when the exhaust-gas temperature downstream from the EGR cooler is implausible relative to all of the other measured values.
Test condition
The monitoring routine executes once per driving cycle in the cold-start phase.
Voltage condition
The monitoring routine executes once per driving cycle in the cold-start phase.
The measured variables from the air-temperature sensors are checked against each other for relative plausibility. The DTC is logged when the exhaust-gas temperature downstream from the low-pressure EGR cooler is implausible relative to all of the other measured values.
Test condition
The monitoring routine executes once per driving cycle in the cold-start phase.
Voltage condition
The monitoring routine executes once per driving cycle in the cold-start phase.
Monitoring for separation of boost-air hose via dynamic observation of boost pressure. The diagnostic trouble code is logged when the boost-pressure control deviation exceeds a specific limit defined according to operating point.
Test condition
The test routine is executed continuously every 10 ms.
Voltage condition
The test routine is executed continuously every 10 ms.
Monitoring for separated boost-air hose via air mass in near-idle range with exhaust-gas recirculation deactivated. The diagnostic trouble code is logged when the air mass measured at the HFM falls below a limit value defined according to operating point.
Test condition
The error check runs under the following conditions
- Injection quantity lies between 2 mg/hub and 70 mg/hub.
- Engine speed between 600 1/min and 1600 1/min.
- No other relevant diagnostic trouble code has been logged.
The test routine is executed continuously every 10 ms.
Voltage condition
The error check runs under the following conditions
- Injection quantity lies between 2 mg/hub and 70 mg/hub.
- Engine speed between 600 1/min and 1600 1/min.
- No other relevant diagnostic trouble code has been logged.
The test routine is executed continuously every 10 ms.
Trouble with communications to PT CAN bus, signal reception is no longer present. Control module has deactivated itself from the PT CAN bus (bus off).
Test condition
Continuous, corresponding to the configured time grid.
Voltage condition
Continuous, corresponding to the configured time grid.
Communications to the CAN bus are impaired and no additional signals are received. The ECU has disconnected itself from the CAN bus (bus off).
Test condition
Continuous, corresponding to the configured time grid.
Voltage condition
Continuous, corresponding to the configured time grid.
The ECU recognizes an internal error while processing the PT CAN signal. (PT CAN controller)
Test condition
Continuous, corresponding to the configured time grid.
Voltage condition
Continuous, corresponding to the configured time grid.
A defective intercooler is recognized when the following conditions are met
- The enable time for debounce of the monitoring signal is greater than or equal to the limit value 150 s.
- The calculated intercooler efficiency level is less than a limit value defined according to current operating coordinates.
Test condition
A check runs whenever the enable time is greater than 150 s.
Voltage condition
A check runs whenever the enable time is greater than 150 s.
The DDE recognizes an open-circuit error at the output stage: switch valve for compressor bypass valve.
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
The DDE recognizes an over-temperature fault in the output stage: Switch valve for compressor bypass valve.
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
The DDE recognizes a short circuit to positive in the output stage: Switch valve for compressor bypass valve.
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
The DDE recognizes a short to ground at the output stage: Switch valve for compressor bypass valve.
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
Dynamic plausibility check on coolant temperature sensor. The diagnostic trouble code is logged when the difference between the current coolant temperature and the coolant temperature at engine start is less than a limit defined with the program map.
Test condition
The monitoring system is active when compliance with the following conditions is present
- The coolant temperature at engine start must exceed 40 °C.
- The injection quantity must exceed 11 mg/hub.
- The engine RPM must be in excess of 1000 1/min.
If one of the conditions listed above is not satisfied within a period defined in the program map, the timer stops and restarts from this count when compliance with the conditions is again present. The timer is not reset until the next driving cycle.
Voltage condition
The monitoring system is active when compliance with the following conditions is present
- The coolant temperature at engine start must exceed 40 °C.
- The injection quantity must exceed 11 mg/hub.
- The engine RPM must be in excess of 1000 1/min.
If one of the conditions listed above is not satisfied within a period defined in the program map, the timer stops and restarts from this count when compliance with the conditions is again present. The timer is not reset until the next driving cycle.
The diagnostic fault code is logged when the coolant-temperature sensor signal rises above the limit value 138 °C.
Test condition
The monitoring function is active only when no other error has been logged for the coolant-temperature sensor.
Voltage condition
The monitoring function is active only when no other error has been logged for the coolant-temperature sensor.
Coolant temperature sensor voltage range monitor. If the raw sensor signal (voltage) lies above the limit 3280 mV the diagnostic trouble code is logged.
Test condition
None.
Voltage condition
None.
Coolant temperature sensor voltage range monitor. The diagnostic trouble code is logged when the raw sensor signal (voltage) lies below the limit 200 mV.
Test condition
none
Voltage condition
none
none
none
The diagnostic trouble code is logged when the message GETRIEBEDATEN (TRANSMISSION DATA) has a checksum error.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
The error is recognized when the alive signal of the message GETRIEBEDATEN (TRANSMISSION DATA) is invalid.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
The error is recognized when at least one signal in the message GETRIEBEDATEN (TRANSMISSION DATA) is received with an error value.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted every 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted every 20 ms.
The error is checked in a 20 ms time grid.
The error is recognized when the message GETRIEBEDATEN (TRANSMISSION DATA) is not received.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
The diagnostic trouble code is logged when at least one signal for the DIENSTE (SERVICES) message is received with an incorrect value.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted every 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted every 20 ms.
The error is checked in a 20 ms time grid.
The diagnostic trouble code is logged when the DIENSTE (SERVICES) message is not received.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 1000 ms.
The error is checked in a 100 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 1000 ms.
The error is checked in a 100 ms time grid.
The diagnostic trouble code is logged when the NOx sensor message is not received.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 10 ms.
The error is checked in a 10 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 10 ms.
The error is checked in a 10 ms time grid.
Monitoring of NOx sensor ID (Sensor 2 behind SCR converter).
The installed sensor is not correct for this system.
Test condition
The error check runs while the sensor is being initialized.
Voltage condition
The error check runs while the sensor is being initialized.
Monitoring ID of NOx sensor before the SCR converter.
The installed sensor is not correct for this system.
Test condition
The error check runs while the sensor is being initialized.
Voltage condition
The error check runs while the sensor is being initialized.
The diagnostic trouble code is logged when the NOx sensor message is not received.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be activated.
The signals are transmitted in cycles with a periodicity of 10 ms.
The error is checked in a 10 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be activated.
The signals are transmitted in cycles with a periodicity of 10 ms.
The error is checked in a 10 ms time grid.
The diagnostic trouble code is logged when at least one signal of the message A_TEMP_RELATIVZEIT is received with an error value.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted every 20 ms.
The error is checked in a 100 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted every 20 ms.
The error is checked in a 100 ms time grid.
If the message A_TEMP_RELATIVZEIT is not received the diagnostic trouble code is logged.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 1000 ms.
The error is checked in a 100 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 1000 ms.
The error is checked in a 100 ms time grid.
The diagnostic trouble code is logged when a checksum error is present for the message DREHMOMENT_ANF_EGS.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
The error is recognized if the alive signal of the message DREHMOMENT_ANF_EGS is invalid.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
The error is recognized when at least one signal in the message DREHMOMENT_ANF_EGS is received with an error value.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted every 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted every 20 ms.
The error is checked in a 20 ms time grid.
The error is recognized when the message DREHMOMENT_ANF_EGS is not received.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
The diagnostic trouble code is logged when the message GESCHWINDIGKEIT_RAD is not received.
Test condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be activated.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
Voltage condition
The following conditions must be satisfied
- The message must be active.
- Terminal 15 must be activated.
The signals are transmitted in cycles with a periodicity of 20 ms.
The error is checked in a 20 ms time grid.
Monitoring of correction factors for NOx sensor behind SCR converter.
The diagnostic trouble code is logged when
- the NOx correction factor (gradient) does not lie between 800 and 1200.
- the NOx correction factor (offset) does not lie between -200 and 200.
Test condition
The error check runs while the sensor is being initialized.
Voltage condition
The error check runs while the sensor is being initialized.
Monitoring correction factors for NOx sensor before the SCR converter.
The diagnostic trouble code is logged when
- the NOx correction factor (gradient) does not lie between 800 and 1200.
- the NOx correction factor (offset) does not lie between -200 and 200.
Test condition
The error check runs while the sensor is being initialized.
Voltage condition
The error check runs while the sensor is being initialized.
The DDE recognizes a load drop error in the output stage: Positive crankcase ventilation heater.
none
The DDE recognizes an over-temperature fault in the output stage
Positive crankcase ventilation heater.
none
The DDE recognizes a short circuit to positive error in the output stage
Positive crankcase ventilation heater.
none
The DDE recognizes short circuit to ground error in the output stage
Positive crankcase ventilation heater.
none
The diagnostic trouble code is logged when the modeled coolant temperature rises above the threshold 70 °C and the measured coolant temperature is simultaneously below the limit 60 °C.
Test condition
The following conditions must be met for the error check
- Engine RPM greater than 450 1/min.
- Vehicle speed greater than 0 km/h.
- For a period of 2700 s the temperature at engine start must lie between -40 °C and 70 °C.
- No other diagnostic trouble codes for the coolant-temperature sensor should be present.
- The outside temperature must be below -7 °C.
The test routine is executed continuously in a 1000 ms grid.
Voltage condition
The following conditions must be met for the error check
- Engine RPM greater than 450 1/min.
- Vehicle speed greater than 0 km/h.
- For a period of 2700 s the temperature at engine start must lie between -40 °C and 70 °C.
- No other diagnostic trouble codes for the coolant-temperature sensor should be present.
- The outside temperature must be below -7 °C.
The test routine is executed continuously in a 1000 ms grid.
Internal communications within the control module are monitored. A DTC is logged when the received data have incorrect checksums or no data transmission is possible.
Test condition
Voltage condition
The DDE recognizes a load drop error in the output stage: Switch valve for EGR cooler bypass valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes an over-temperature fault in the output stage: Switch valve for EGR cooler bypass valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short circuit to positive in the output stage: Switch valve for EGR cooler bypass valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes short circuit to ground error in the output stage: Switch valve for EGR cooler bypass valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The diagnostic trouble code is logged when it is not possible to delete a complete sector in the DDE storage medium (flash only), or it is not possible to complete a change of the sector in the storage medium.
Test condition
At each sector change.
Voltage condition
At each sector change.
The diagnostic trouble code is logged when more than 3 read errors occur during attempts to read a block from the storage medium (EEPROM).
Test condition
Each time the storage medium is accessed for reading.
Voltage condition
Each time the storage medium is accessed for reading.
The diagnostic trouble code is logged when more than 3 write errors occur during attempts to write a block to the storage medium (EEPROM).
Test condition
Each time the storage medium is accessed for reading.
Voltage condition
Each time the storage medium is accessed for reading.
Monitoring EGR cooler bypass valve.
The temperature downstream from the EGR cooler bypass valve is stored at specific times.
The stored temperatures are employed to generate two temperature gradients.
An activation signal is transmitted to the EGR cooler bypass valve while the temperature gradients are being generated. If the EGR cooler bypass valve is in good condition then a temperature variation must be apparent. In contrast, if the EGR cooler bypass valve is defective then virtually no variation in the temperature gradient will be apparent.
The diagnostic trouble code is logged when the absolute difference between the temperature gradients falls below the limit value 5 K.
Test condition
The check runs every 100 ms when all of the enable conditions are present
- For a duration of 1000 ms the specified torque gradient is below 4 Nm/s.
- The RPM is within the limits 980 1/min and 590 1/min.
- For the duration 1000 ms the modeled exhaust-gas recirculation rate is greater than 21.
- The engine is running at idle.
- The air mass control/EGR rate control is active and no deactivation conditions are active.
- The vehicle speed is less than 3 km/h.
- The engine is not in the regeneration mode.
- The coolant temperature is between 60 °C and 110 °C.
- The modeled exhaust-gas temperature is greater than EGR.
- The temperature behind the EGR cooler is below the limit value 1 K/s.
- The injection rate is between 6 mg/hub and 100 mg/hub.
Voltage condition
The check runs every 100 ms when all of the enable conditions are present
- For a duration of 1000 ms the specified torque gradient is below 4 Nm/s.
- The RPM is within the limits 980 1/min and 590 1/min.
- For the duration 1000 ms the modeled exhaust-gas recirculation rate is greater than 21.
- The engine is running at idle.
- The air mass control/EGR rate control is active and no deactivation conditions are active.
- The vehicle speed is less than 3 km/h.
- The engine is not in the regeneration mode.
- The coolant temperature is between 60 °C and 110 °C.
- The modeled exhaust-gas temperature is greater.
- The temperature behind the EGR cooler is below the limit value 1 K/s.
- The injection rate is between 6 mg/hub and 100 mg/hub.
The DDE recognizes an open circuit in the output stage
EGR actuator.
Test condition
The error is evaluated when a sticking valve is recognized or the open circuit diagnosis is active.
The diagnosis routine also runs when a start occurs.
Voltage condition
The error is evaluated when a sticking valve is recognized or the open circuit diagnosis is active.
The diagnosis routine also runs when a start occurs.
The DDE recognizes an over-temperature fault in the output stage
EGR actuator.
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
The DDE recognizes a short circuit to positive at the output stage's positive output
EGR actuator
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
The DDE recognizes a short circuit to positive at the output stage's negative output
EGR actuator.
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
The DDE recognizes a short circuit to ground at the positive output of output stage
EGR actuator.
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
The DDE recognizes a short circuit to ground at the negative output of the output stage
EGR actuator.
Test condition
The test routine is implemented each time process runs.
Voltage condition
The test routine is implemented each time process runs.
If a positive or negative deviation in the EGR control system remains present for a period of 1 s, and it has proven impossible to resolve this issue despite attempts to free the valve with the EGR actuator in the intervening period, the system recognizes the EGR valve as sticking in its closed position.
For this the actual pulse-duty factor of the EGR actuator must be less than 1 % or the specified pulse-duty factor of the EGR actuator greater
In this case a counter starts advancing. This deactivates monitoring for persistent EGR control deviation.
A diagnostic trouble code is logged when the counter reaches the limit value 6.
Test condition
The monitoring function is active only when the monitoring function for permanent control deviation in the EGR control is also active and a persistent control deviation has already been detected.
Voltage condition
The monitoring function is active only when the monitoring function for permanent control deviation in the EGR control is also active and a persistent control deviation has already been detected.
If a negative control deviation in the EGR control system remains present for a period of 1 s, and it proves impossible to resolve this issue despite attempts to free the valve with the EGR actuator in the intervening period, the system recognizes the EGR valve as sticking in its open position.
For this the actual pulse-duty factor of the EGR actuator must be greater than 3 % or the specified pulse-duty factor of the EGR actuator less than.
A counter is incrementalized in response. This deactivates monitoring for persistent control deviation.
A diagnostic trouble code is logged when the counter reaches the limit value 6.
Test condition
The monitoring function is active only when the monitoring function for permanent control deviation in the EGR control is also active and a persistent control deviation has already been detected.
Voltage condition
The monitoring function is active only when the monitoring function for permanent control deviation in the EGR control is also active and a persistent control deviation has already been detected.
If a positive or negative deviation in the low-pressure EGR control system remains present for a period of 3 s, and it has proven impossible to resolve this issue despite attempts to free the valve with the low-pressure EGR actuator in the intervening period, the system recognizes the low-pressure EGR valve as sticking in its closed position.
For this the actual pulse-duty factor of the low-pressure EGR actuator must be less than 5 %
A counter is incrementalized in response. This deactivates monitoring for persistent control deviation.
A diagnostic trouble code is logged when the counter reaches the limit value 6.
Test condition
The monitoring function is active only when the monitoring function for persistent control deviation in the low-pressure EGR control is also active and a persistent control deviation has already been detected.
Voltage condition
The monitoring function is active only when the monitoring function for persistent control deviation in the low-pressure EGR control is also active and a persistent control deviation has already been detected.
If a negative deviation in the low-pressure EGR control system remains present for a period of 3 s, and it has proven impossible to resolve this issue despite attempts to free the valve with the low-pressure EGR actuator in the intervening period, the system recognizes the low-pressure EGR valve as sticking in its open position.
For this the actual pulse-duty factor of the low-pressure EGR actuator must be greater than 7 %
A counter is incrementalized in response. This deactivates monitoring for persistent control deviation.
A diagnostic trouble code is logged when the counter reaches the limit value 6.
Test condition
The monitoring function is active only when the monitoring function for persistent control deviation in the EGR control system is also active and a persistent control deviation has already been detected.
Voltage condition
The monitoring function is active only when the monitoring function for persistent control deviation in the EGR control system is also active and a persistent control deviation has already been detected.
The DDE recognizes a load drop error in the output stage
Low-pressure EGR actuator.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes an over-temperature fault in the output stage
Low-pressure EGR actuator.
Test condition
The error check proceeds continuously in the programmed process grid.
Voltage condition
The error check proceeds continuously in the programmed process grid.
The DDE recognizes a short circuit to plus error in the output stage: Low-pressure EGR actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes short circuit to ground error in the output stage
Low-pressure EGR actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
Low-pressure EGR travel feedback sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) is greater than 4900 mV.
Test condition
No faults related to the sensor's voltage supply should be logged.
Voltage condition
No faults related to the sensor's voltage supply should be logged.
Low-pressure EGR travel feedback sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than 100 mV.
Test condition
No faults related to the sensor's voltage supply should be logged.
Voltage condition
No faults related to the sensor's voltage supply should be logged.
EGR valve position sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) is greater than 3200 mV.
Test condition
No faults related to the sensor's voltage supply should be logged.
Voltage condition
No faults related to the sensor's voltage supply should be logged.
EGR valve position sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than 50 mV.
Test condition
No faults related to the sensor's voltage supply should be logged.
Voltage condition
No faults related to the sensor's voltage supply should be logged.
Monitoring zero delivery rate adaptation.
The diagnostic trouble code is logged when the corrected injection activation period at one of the 3 calibration points exceeds the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero delivery rate adaptation.
The diagnostic trouble code is logged when the corrected injection activation period at one of the 3 calibration points exceeds the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero delivery rate adaptation.
The diagnostic trouble code is logged when the corrected injection activation period at one of the 3 calibration points exceeds the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero delivery rate adaptation.
The diagnostic trouble code is logged when the corrected injection activation period at one of the 3 calibration points exceeds the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero delivery rate adaptation.
The diagnostic trouble code is logged when the corrected injection activation period at one of the 3 calibration points exceeds the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero delivery rate adaptation.
The diagnostic trouble code is logged when the corrected injection activation period at one of the 3 calibration points exceeds the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero-quantity delivery rate adaptation.
The diagnostic trouble code is logged when the injector activation period at one of the 3 calibration points falls below the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero-quantity delivery rate adaptation.
The diagnostic trouble code is logged when the injector activation period at one of the 3 calibration points falls below the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero-quantity delivery rate adaptation.
The diagnostic trouble code is logged when the injector activation period at one of the 3 calibration points falls below the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero-quantity delivery rate adaptation.
The diagnostic trouble code is logged when the injector activation period at one of the 3 calibration points falls below the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero-quantity delivery rate adaptation.
The diagnostic trouble code is logged when the injector activation period at one of the 3 calibration points falls below the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
Monitoring zero-quantity delivery rate adaptation.
The diagnostic trouble code is logged when the injector activation period at one of the 3 calibration points falls below the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.
Test condition
Monitoring proceeds in a 100 ms grid.
Voltage condition
Monitoring proceeds in a 100 ms grid.
The exhaust-gas temperature control system relies on different control parameters (adjustment of throttle valve, secondary injection, etc.) to regulate the temperature of the exhaust gas to a specified level (roughly 620°C) during regeneration of the particulate filter. The external closed-loop control circuit regulates the exhaust-gas temperature of the particulate filter. The diagnostic trouble code is logged when the control deviation of the outer control circuit rises above a limit defined according to operating point and the current control variable of the outer control circuit lies above the threshold 1.
Test condition
The test routine runs when the following conditions are satisfied
- The exhaust-gas temperature controller's control variable has reached its maximum.
- The outer exhaust-gas temperature controller must be active.
- The current operating point must be valid.
- The actual temperature of the inner exhaust-gas control circuit must exceed 10 s.
The check runs continuously in a 100 ms grid.
Voltage condition
The test routine runs when the following conditions are satisfied
- The exhaust-gas temperature controller's control variable has reached its maximum.
- The outer exhaust-gas temperature controller must be active.
- The current operating point must be valid.
- The actual temperature of the inner exhaust-gas control circuit must exceed 10 s.
The check runs continuously in a 100 ms grid.
Monitoring of response lag of exhaust-gas temperature control for the outer control circuit. The diagnostic trouble code is logged when the period since activation of the inner control circuit exceeds a limit value defined by operating point.
Test condition
The test routine runs when the following conditions are satisfied
- The inner exhaust-gas temperature controller is enabled in the current operating mode and no system errors should be present.
- The inner exhaust-gas temperature controller must be active.
The check runs continuously in a 100 ms grid.
Voltage condition
The test routine runs when the following conditions are satisfied
- The inner exhaust-gas temperature controller is enabled in the current operating mode and no system errors should be present.
- The inner exhaust-gas temperature controller must be active.
The check runs continuously in a 100 ms grid.
The engine downtime is the period between the last time the engine was shut down and the most recent engine start.
The engine downtime monitoring function is implemented in two versions
- The system determines whether the count for the relative time received in the CAN bus advances correctly. This process compares the relative time with a software timer within the ECU. The diagnostic trouble code is logged when the time differential is greater than 8 s.
- The engine downtime continuously monitored during the current driving cycle is written to the EEPROM (from engine downtime until deactivation of the main relay). This time is read from the EEPROM when the next driving cycle is initialized. The diagnostic trouble code is logged when this time is greater than the currently determined engine downtime.
This fault can occur when the instrument cluster's second counter has been interrupted. This scenario can arise when worked has been performed on the instrument cluster (reset, flash-programming, power supply deactivated...).
Test condition
The monitoring function is executed only when
The relative time received on the CAN bus is greater than the threshold.
The software timer may not exceed the overrun of 248 days with the first version of the monitoring function.
With the second version the monitoring function the relative time must have exceeded the limit value 604800 s to avoid incorrect diagnosis when the battery is disconnected.
Voltage condition
The monitoring function is executed only when
The relative time received on the CAN bus is greater than the threshold.
The software timer may not exceed the overrun of 248 days with the first version of the monitoring function.
With the second version the monitoring function the relative time must have exceeded the limit value 604800 s to avoid incorrect diagnosis when the battery is disconnected.
Monitoring of particulate filter differential-pressure sensor. A diagnostic trouble code is logged when the particulate filter's pressure differential rises beyond the maximum limit.
Test condition
The check runs continuously in a 100 ms grid.
Voltage condition
The check runs continuously in a 100 ms grid.
Monitoring of exhaust-gas temperature sensor before particulate filter. When the exhaust-gas temperature rises above the physically logical upper the DTC is logged.
Test condition
The check runs continuously in a 100 ms grid.
Voltage condition
The check runs continuously in a 100 ms grid.
Monitoring of particulate filter differential-pressure sensor. A diagnostic trouble code is logged when the particulate filter's differential pressure falls below the minimum limit value -40 mbar.
Test condition
The check runs continuously in a 100 ms grid.
Voltage condition
The check runs continuously in a 100 ms grid.
The diagnostic trouble code is logged when the physical sensor signal for barometric pressure rises above the limit value 1100 mbar.
Test condition
The monitoring function is only implemented when no electrical error is logged.
Voltage condition
The monitoring function is only implemented when no electrical error is logged.
The diagnostic trouble code is logged when the physical sensor signal for barometric pressure falls below the limit value 490 mbar.
Test condition
The monitoring function is only implemented when no electrical error is logged.
Voltage condition
The monitoring function is only implemented when no electrical error is logged.
Barometric pressure sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) is greater than 4900 mV.
Test condition
Voltage condition
Barometric pressure sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than 1110 mV.
Test condition
Voltage condition
Outside temperature plausibility check. The plausibility error is logged when the difference between the boost-air temperature and the outside temperature rises above the limit value 35 K.
The outside temperature is calculated from a physical temperature, the sensor ambient temperature, and an additive offset correction factor.
Test condition
The following conditions must be met before the error check can be active
Either the boost-air temperature must lie between -40 °C and 70 °C or the outside temperature must be between -40 °C and 70 °C.
The speed signal must be greater than or equal to 75 km/h.
The monitored mass airflow must be greater than or equal to 100 kg/h.
Voltage condition
The following conditions must be met before the error check can be active
Either the boost-air temperature must lie between -40 °C and 70 °C or the outside temperature must be between -40 °C and 70 °C.
The speed signal must be greater than or equal to 75 km/h.
The monitored mass airflow must be greater than or equal to 100 kg/h.
The diagnostic trouble code is logged when the physical sensor signal for outside temperature rises above the limit value 80 °C.
Test condition
The monitoring routine is executed only provided that no electrical errors related to the sensor have been logged.
Voltage condition
The monitoring routine is executed only provided that no electrical errors related to the sensor have been logged.
Outside temperature sensor monitoring. The diagnostic trouble code is logged when the raw signal (voltage) from the outside temperature sensor signal rises above the limit value.
Test condition
Continuous.
Voltage condition
Continuous.
Outside temperature sensor monitoring. The error heals when the raw sensor signal (voltage) for outside temperature falls below the limit value
Test condition
Continuous.
Voltage condition
Continuous.
An angular offset between crankshaft and camshaft produces a deterioration in exhaust emissions. This monitoring function detects angular offset between camshaft and crankshaft. The median angular offset must lie between -20 ° crank angle and 20 ° crank angle. The following error debounce is carried out when the limits are violated: When the deviation in camshaft position corresponding to error status is detected for 6 consecutive operating cycles the DTC is logged.
Test condition
At low engine speeds the defect counter registers actual consecutive camshaft revolutions. Because the calculation process only runs once every 100 ms, at high engine speeds multiple camshaft revolutions can elapse between scans, and these would not be included. Under these conditions the defect counter advances by just one increment with each scan, even if multiple camshaft revolutions have occurred.
Voltage condition
At low engine speeds the defect counter registers actual consecutive camshaft revolutions. Because the calculation process only runs once every 100 ms, at high engine speeds multiple camshaft revolutions can elapse between scans, and these would not be included. Under these conditions the defect counter advances by just one increment with each scan, even if multiple camshaft revolutions have occurred.
A crankshaft signal error is recognized when the number of sensor plausibility check errors reaches the limit 200. The error counter increases by the step width 10.
Test condition
The check starts as soon as the engine starts and continues for as long as the engine runs. The system monitors the crankshaft signal at every crankshaft flank (= crankshaft tooth).
Voltage condition
The check starts as soon as the engine starts and continues for as long as the engine runs. The system monitors the crankshaft signal at every crankshaft flank (= crankshaft tooth).
The DTC is logged when no crankshaft signal is detected in the course of 2 camshaft rotations.
Test condition
The check starts as soon as the engine starts and continues for as long as the engine runs. The system monitors the crankshaft signal at every crankshaft flank (= crankshaft tooth).
Voltage condition
The check starts as soon as the engine starts and continues for as long as the engine runs. The system monitors the crankshaft signal at every crankshaft flank (= crankshaft tooth).
The error is logged when the difference between the measured and the simulated exhaust-gas temperature upstream from (on engine side of) the oxidation catalyst lies outside the plausibility window.
Test condition
The error check is activated when no other faults are stored for the sensor.
Voltage condition
The error check is activated when no other faults are stored for the sensor.
The DTC is logged when the difference between the measured and the simulated exhaust-gas temperature upstream from the particulate filter lies outside a plausibility window.
Test condition
The error check is activated when no other faults are stored for the sensor.
Voltage condition
The error check is activated when no other faults are stored for the sensor.
The DTC is logged when the difference between the measured and the simulated exhaust-gas temperature before the SCR converter lies outside the plausibility window.
Test condition
The error check is activated when no other faults are stored for the sensor.
Voltage condition
The error check is activated when no other faults are stored for the sensor.
Plausibility check on exhaust-gas temperature sensor before oxidation catalyst.
For the plausibility check the temperature before the oxidation catalyst is compared with the other exhaust-gas temperature data, then the sensor plausibility is determined by calculating the differences.
The diagnostic trouble code is logged when the monitored sensor's data displays implausibility relative to that from the remaining sensors.
Test condition
The error check runs once per driving cycle once an engine cold start is detected and provided that the barometric pressure is above 750 mbar.
Voltage condition
The error check runs once per driving cycle once an engine cold start is detected and provided that the barometric pressure is above 750 mbar.
Plausibility check on exhaust-gas temperature sensor before the particulate filter. For the plausibility check the exhaust-gas temperature value before the particulate filter is compared with the other exhaust-gas temperature data, then sensor plausibility is determined by calculating the differences.
The diagnostic trouble code is logged when the monitored sensor's data display implausibility relative to that from the remaining sensors.
Test condition
The error check runs once per driving cycle once an engine cold start is detected and provided that the barometric pressure is above 750 mbar.
Voltage condition
The error check runs once per driving cycle once an engine cold start is detected and provided that the barometric pressure is above 750 mbar.
Plausibilities of exhaust-gas temperature sensor before the SCR converter. For the plausibility check the exhaust-gas temperature value before the SCR converter filter is compared with the other exhaust-gas temperature data, then sensor plausibility is determined by calculating the differences.
The diagnostic trouble code is logged when the monitored sensor's data are implausible relative to the data from the remaining sensors.
Test condition
The error check runs once per driving cycle once an engine cold start is detected and provided that the barometric pressure is above 750 mbar.
Voltage condition
The error check runs once per driving cycle once an engine cold start is detected and provided that the barometric pressure is above 750 mbar.
Monitoring of calculated injection correction quantity.
The diagnostic trouble code is logged when the total correction quantity minus the current value for the base correction quantity rises above the limit value calculated based on the current operating point (limit value roughly 25 mg, depends on injection quantity and actual air mass). The monitoring function covers the injection quantities for all cylinders and is determined using the lambda factor. The EGR rate is used in an attempt to compensate for the deviation in the injection quantity.
Test condition
The monitoring function is active when the injection quantity monitoring is active.
Voltage condition
The monitoring function is active when the injection quantity monitoring is active.
Monitoring of calculated injection correction quantity.
The diagnostic trouble code is logged when the total correction quantity minus the current value for the base correction quantity falls below the limit value calculated based on the current operating point (limit value roughly -25 mg, depends on injection quantity and actual air mass). The monitoring function covers the injection quantities for all cylinders and is determined using the lambda factor.
Test condition
The monitoring function is active when the injection quantity monitoring is active.
Voltage condition
The monitoring function is active when the injection quantity monitoring is active.
The diagnostic trouble code is logged when the physical sensor signal for fuel temperature rises above the limit value 100 °C.
Test condition
The monitoring routine is executed only provided that no electrical errors have been logged. The error check proceeds continuously in the programmed process grid.
Voltage condition
The monitoring routine is executed only provided that no electrical errors have been logged. The error check proceeds continuously in the programmed process grid.
Fuel temperature sensor monitor. The DTC is logged when the raw sensor signal (voltage) violates the approved upper limit 3280 mV.
Test condition
None.
Voltage condition
None.
Fuel temperature sensor monitor. The DTC is logged when the raw sensor signal (voltage) falls below the approved lower limit 220 mV.
Test condition
None.
Voltage condition
None.
Fuel temperature plausibility check with Terminal 15 on. The diagnostic trouble code is logged when the difference between fuel temperature and coolant temperature rises above the limit value.
The limit value (roughly 21 °C) is calculated using a characteristic curve based on the engine's downtime.
Test condition
The error check runs once per driving cycle provided that compliance with the following conditions is present
- The engine downtime is greater than or equal to 25200 s.
- No other error is logged.
- The intake-air temperature lies above the threshold -7 °C.
Voltage condition
The error check runs once per driving cycle provided that compliance with the following conditions is present
- The engine downtime is greater than or equal to 25200 s.
- No other error is logged.
- The intake-air temperature lies above the threshold -7 °C.
The installed glow plugs are incorrect for the specific engine.
The DDE recognizes the fault based on a LIN signal.
The LIN signal can assume the following values
- 1: Invalid combination of engine type/glow plug type
- 3: Different glow plug types installed
- 13: Not defined 15: Invalid
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
EEPROM error in glow-plug preheating control module.
The DDE recognizes the fault based on a LIN signal.
The LIN signal can assume the following values
- Fault in EEPROM
- Invalid
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
Error in glow plug message transmitted on LIN bus.
The DDE recognizes the fault based on a LIN signal.
The LIN signal can assume the following values
- 1: Error detected
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The DDE control module can no longer read the LIN message with the glow plug error information.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The DDE control module can no longer read the LIN message with the glow-plug preheating control module error information.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The preheating control module detects a defective output stage for activation of the glow plug at cyl. no. 1.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports an open circuit at glow plug 1 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a short to ground at glow plug 1 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a resistance fault at glow plug 1 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The preheating control module detects a defective output stage for activation of the glow plug at cyl. no. 2.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports an open circuit at glow plug 2 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a short to ground at glow plug 2 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a resistance fault at glow plug 2 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The preheating control module detects a defective output stage for activation of the glow plug at cyl. no. 3.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports an open circuit at glow plug 3 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a short to ground at glow plug 3 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a resistance fault at glow plug 3 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The preheating control module detects a defective output stage for activation of the glow plug at cyl. no. 4.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports an open circuit at glow plug 4 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a short to ground at glow plug 4 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a resistance fault at glow plug 4 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The preheating control module detects a defective output stage for activation of the glow plug at cyl. no. 5.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports an open circuit at glow plug 5 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a short to ground at glow plug 5 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a resistance fault at glow plug 5 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The preheating control module detects a defective output stage for activation of the glow plug at cyl. no. 6.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports an open circuit at glow plug 6 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a short to ground at glow plug 6 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a resistance fault at glow plug 6 in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
The glow-plug preheating control module reports a fault in the ground connection between the glow-plug preheating control module and the glow plugs in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
Internal malfunction in glow-plug preheating control module.
The glow-plug preheating control module reports an internal fault in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
Timeout error in a LIN message from the glow-plug preheating control module.
Test condition
The LIN message GPCM_Info is transmitted every 500 ms.
Voltage condition
The LIN message GPCM_Info is transmitted every 500 ms.
The glow-plug preheating control module recognizes the voltage at Terminal 30 of the glow-plug preheating control module as too low.
The glow-plug preheating control module reports the fault to the DDE in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
Preglow ECU overheating error.
The glow-plug preheating control module reports the fault to the DDE in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
Difference between electrical system voltage at glow-plug preheating control module and Terminal 30 at glow-plug preheating control module is too high.
The glow-plug preheating control module reports the fault to the DDE in a LIN message.
Test condition
The LIN message is transmitted every 500 ms.
Voltage condition
The LIN message is transmitted every 500 ms.
Idle controller monitoring.
The diagnostic trouble code is logged when the engine's idle RPM rises above a limit value. The limit value is calculated from the lower specified engine RPM as defined according to operating point and the offset value. The maximum limit value is 1500 1/min.
Test condition
The test routine runs when the following conditions are satisfied
The idle controller is active.
The vehicle's speed must exceed 1 km/h.
The idle controller is the only station requesting torque generation.
The idle controller is requesting torque lower than the limit value 0.
The engine RPM exceeds the limit value 300 1/min.
The check runs continuously in a 100 ms grid.
Voltage condition
The test routine runs when the following conditions are satisfied
The idle controller is active.
The vehicle's speed must exceed 1 km/h.
The idle controller is the only station requesting torque generation.
The idle controller is requesting torque lower than the limit value 0.
The engine RPM exceeds the limit value 300 1/min.
The check runs continuously in a 100 ms grid.
Idle controller monitoring.
The diagnostic trouble code is logged when the engine's idle RPM falls below a limit value. The limit value is calculated from the lower specified engine RPM as defined according to operating point and the offset value. The minimum limit value is 300 1/min.
Test condition
The test routine runs when the following conditions are satisfied
The idle controller is active.
The vehicle's speed must exceed 1 km/h.
The idle controller is the only station requesting torque generation.
The idle controller is requesting torque lower than the limit value 0.
The engine RPM exceeds the limit value 300 1/min.
The check runs continuously in a 100 ms grid.
Voltage condition
The test routine runs when the following conditions are satisfied
The idle controller is active.
The vehicle's speed must exceed 1 km/h.
The idle controller is the only station requesting torque generation.
The idle controller is requesting torque lower than the limit value 0.
The engine RPM exceeds the limit value 300 1/min.
The check runs continuously in a 100 ms grid.
Monitoring for missing or incorrect programming of injector quantity calibration data for the injector. If the checksum for the injector calibration data is incorrect or if the base correction quantity exceeds the specified limits at a minimum of one injector test point, or if a read error that occurs when the EEPROM is being accessed makes it impossible to read the calibration data, then the diagnostic trouble code is logged.
Test condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Voltage condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Monitoring for missing or incorrect programming of injector quantity calibration data for the injector. If the checksum for the injector calibration data is incorrect or if the base correction quantity exceeds the specified limits at a minimum of one injector test point, or if a read error that occurs when the EEPROM is being accessed makes it impossible to read the calibration data, then the diagnostic trouble code is logged.
Test condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Voltage condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Monitoring for missing or incorrect programming of injector quantity calibration data for the injector. If the checksum for the injector calibration data is incorrect or if the base correction quantity exceeds the specified limits at a minimum of one injector test point, or if a read error that occurs when the EEPROM is being accessed makes it impossible to read the calibration data, then the diagnostic trouble code is logged.
Test condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Voltage condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Monitoring for missing or incorrect programming of injector quantity calibration data for the injector. If the checksum for the injector calibration data is incorrect or if the base correction quantity exceeds the specified limits at a minimum of one injector test point, or if a read error that occurs when the EEPROM is being accessed makes it impossible to read the calibration data, then the diagnostic trouble code is logged.
Test condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Voltage condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Monitoring for missing or incorrect programming of injector quantity calibration data for the injector. If the checksum for the injector calibration data is incorrect or if the base correction quantity exceeds the specified limits at a minimum of one injector test point, or if a read error that occurs when the EEPROM is being accessed makes it impossible to read the calibration data, then the diagnostic trouble code is logged.
Test condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Voltage condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Monitoring for missing or incorrect programming of injector quantity calibration data for the injector. If the checksum for the injector calibration data is incorrect or if the base correction quantity exceeds the specified limits at a minimum of one injector test point, or if a read error that occurs when the EEPROM is being accessed makes it impossible to read the calibration data, then the diagnostic trouble code is logged.
Test condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
Voltage condition
The error check runs during the DDE ECU's initialization routine or when the diagnostic tester implements a change in the calibration data.
The injector quantity compensation data are read from the EEPROM during the ECU initialization routine.
An error for the injector's calibration value is registered when
- a checksum error is present.
- the EEPROM initialization is erroneous.
Test condition
The test routine is executed once during the control module initialization routine.
Voltage condition
The test routine is executed once during the control module initialization routine.
The injector quantity compensation data are read from the EEPROM during the ECU initialization routine.
An error for the injector's calibration value is registered when
- a checksum error is present.
- the EEPROM initialization is erroneous.
Test condition
The test routine is executed once during the control module initialization routine.
Voltage condition
The test routine is executed once during the control module initialization routine.
The injector quantity compensation data are read from the EEPROM during the ECU initialization routine.
An error for the injector's calibration value is registered when
- a checksum error is present.
- the EEPROM initialization is erroneous.
Test condition
The test routine is executed once during the control module initialization routine.
Voltage condition
The test routine is executed once during the control module initialization routine.
The injector quantity compensation data are read from the EEPROM during the ECU initialization routine.
An error for the injector's calibration value is registered when
- a checksum error is present.
- the EEPROM initialization is erroneous.
Test condition
The test routine is executed once during the control module initialization routine.
Voltage condition
The test routine is executed once during the control module initialization routine.
The injector quantity compensation data are read from the EEPROM during the ECU initialization routine.
An error for the injector's calibration value is registered when
- a checksum error is present.
- the EEPROM initialization is erroneous.
Test condition
The test routine is executed once during the control module initialization routine.
Voltage condition
The test routine is executed once during the control module initialization routine.
The injector quantity compensation data are read from the EEPROM during the ECU initialization routine.
An error for the injector's calibration value is registered when
- a checksum error is present.
- the EEPROM initialization is erroneous.
Test condition
The test routine is executed once during the control module initialization routine.
Voltage condition
The test routine is executed once during the control module initialization routine.
The DDE ECU recognizes a short circuit during control-activation of the injectors.
Test condition
The fault is checked every 10 ms.
Voltage condition
The fault is checked every 10 ms.
The DDE ECU recognizes a short circuit during control-activation of the injectors.
Test condition
The fault is checked every 10 ms.
Voltage condition
The fault is checked every 10 ms.
The DDE ECU recognizes a short circuit during control-activation of the injectors.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU recognizes a short circuit during control-activation of the injectors on Bank 2.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The internal monitoring function detects a chip error in the injectors' activation module.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The internal monitoring function detects a chip error in the injectors' activation module.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects an open circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects an open circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects an open circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects an open circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects an open circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects an open circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE detects a short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE detects a short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE detects a short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE detects a short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE detects a short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE detects a short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects a high-resistance short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The test routine is executed continuously every 10 ms.
Voltage condition
The test routine is executed continuously every 10 ms.
The DDE ECU detects a high-resistance short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The test routine is executed continuously every 10 ms.
Voltage condition
The test routine is executed continuously every 10 ms.
The DDE ECU detects a high-resistance short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The test routine is executed continuously every 10 ms.
Voltage condition
The test routine is executed continuously every 10 ms.
The DDE ECU detects a high-resistance short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The test routine is executed continuously every 10 ms.
Voltage condition
The test routine is executed continuously every 10 ms.
The DDE ECU detects a high-resistance short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The test routine is executed continuously every 10 ms.
Voltage condition
The test routine is executed continuously every 10 ms.
The DDE ECU detects a high-resistance short circuit between the positive and negative sides during control-activation of the injector.
Test condition
The test routine is executed continuously every 10 ms.
Voltage condition
The test routine is executed continuously every 10 ms.
The DDE ECU detects a short circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects a short circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects a short circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects a short circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects a short circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The DDE ECU detects a short circuit during control-activation of the injector.
Test condition
The error check is implemented once per camshaft rotation.
Voltage condition
The error check is implemented once per camshaft rotation.
The diagnostic trouble code is logged in the ECU if it was impossible to charge the condensers for activation of the Bank 1 injectors before the period 310 ms elapsed.
Test condition
The test routine is executed continuously in a 10 ms grid.
Voltage condition
The test routine is executed continuously in a 10 ms grid.
The diagnostic trouble code is logged in the ECU if it was impossible to charge the condensers for activation of the Bank 2 injectors before the period 310 ms elapsed.
Test condition
The test routine is executed continuously in a 10 ms grid.
Voltage condition
The test routine is executed continuously in a 10 ms grid.
none
none
Monitoring LIN communications with glow-plug preheating control module. The diagnostic trouble code is logged if no LIN bus communications with the glow-plug preheating control module are possible.
Test condition
The test routine is executed continuously every 100 ms.
Voltage condition
The test routine is executed continuously every 100 ms.
An open circuit error is detected in the Nernst voltage when the resistance of the signal voltage lies above the threshold 3000 mV or the raw O2 value lies above the maximum threshold 1500 mV or below the minimum threshold -1300 mV.
The raw O2 voltage signal should equal roughly 3.3 V or 0 V when an error is present.
Test condition
Check frequency is continuous in accordance with the programmed time grid.
To activate the open circuit error test the following conditions must be satisfied
- The sensor temperature is valid and continuously exceeds the operating temperature for 10 s.
- The vehicle is not in trailing throttle/overrun, debounce implemented with 100 ms and 100 ms.
- The battery voltage is above 10700 mV, debounce implemented with 0 ms and 2000 ms.
- No error related to low battery voltage at the chip or SPI communications error is present.
- The hot oxygen sensor tests are enabled.
The current error status for open circuit is registered as soon as the Ri signal voltage debounced with 0 ms and 0 ms exceeds the threshold 3000 mV.
After the period 2 s the open circuit error test is enabled for the time 2000 ms.
Once 2000 ms has elapsed the test is again deactivated.
Voltage condition
Check frequency is continuous in accordance with the programmed time grid.
To activate the open circuit error test the following conditions must be satisfied
- The sensor temperature is valid and continuously exceeds the operating temperature for 10 s.
- The vehicle is not in trailing throttle/overrun, debounce implemented with 100 ms and 100 ms.
- The battery voltage is above 10700 mV, debounce implemented with 0 ms and 2000 ms.
- No error related to low battery voltage at the chip or SPI communications error is present.
- The hot oxygen sensor tests are enabled.
The current error status for open circuit is registered as soon as the Ri signal voltage debounced with 0 ms and 0 ms exceeds the threshold 3000 mV.
After the period 2 s the open circuit error test is enabled for the time 2000 ms.
Once 2000 ms has elapsed the test is again deactivated.
An open circuit error is recognized in the pump current when the filtered raw O2 signal from the sensor is less than 0 although no lean operation has been detected.
Test condition
Continuous, corresponding to the configured time grid.
The following conditions must be satisfied for an IP load drop test
The vehicle is not in trailing throttle/overrun, debounce implemented with 100 ms and 100 ms.
- No rich-mixture operation detected.
- The O2 signal from the sensor is valid.
- No rich-mixture operation detected, meaning that for longer than 2 s the calculated O2 value is above the limit 0.
The battery voltage is above 10700 mV, debounce implemented with 0 ms and 2000 ms.
- No thermal particulate filter regeneration is present.
Voltage condition
Continuous, corresponding to the configured time grid.
The following conditions must be satisfied for an IP load drop test
The vehicle is not in trailing throttle/overrun, debounce implemented with 100 ms and 100 ms.
- No rich-mixture operation detected.
- The O2 signal from the sensor is valid.
- No rich-mixture operation detected, meaning that for longer than 2 s the calculated O2 value is above the limit 0.
The battery voltage is above 10700 mV, debounce implemented with 0 ms and 2000 ms.
- No thermal particulate filter regeneration is present.
An open circuit failure in the virtual ground is recognized when the signal voltage's resistance is above the threshold 3000 mV and the raw O2 value mV lies between -100 mV and 100 mV.
Test condition
Check frequency is continuous in accordance with the programmed time grid.
For activation of the open circuit error test at UN and VG all of the following conditions must be satisfied
- The sensor temperature is valid and continuously exceeds the operating temperature for a period of 10 s.
The vehicle is not in overrun, debounce implemented with 100 ms and 100 ms.
The battery voltage is above 10700 mV, debounce implemented with 0 ms and 2000 ms.
- No error related to low battery voltage at the chip or SPI communications error is present.
- The hot oxygen sensor tests are enabled.
The current error status for open circuit error is registered as soon as the Ri signal voltage debounced with 0 ms and 0 ms exceeds the threshold 3000 mV.
After the period 2 s the open circuit error test is enabled for the time 2000 ms.
Once 2000 ms has elapsed the test is again deactivated.
Voltage condition
Check frequency is continuous in accordance with the programmed time grid.
For activation of the open circuit error test at UN and VG all of the following conditions must be satisfied
- The sensor temperature is valid and continuously exceeds the operating temperature for a period of 10 s.
The vehicle is not in overrun, debounce implemented with 100 ms and 100 ms.
The battery voltage is above 10700 mV, debounce implemented with 0 ms and 2000 ms.
- No error related to low battery voltage at the chip or SPI communications error is present.
- The hot oxygen sensor tests are enabled.
The current error status for open circuit error is registered as soon as the Ri signal voltage debounced with 0 ms and 0 ms exceeds the threshold 3000 mV.
After the period 2 s the open circuit error test is enabled for the time 2000 ms.
Once 2000 ms has elapsed the test is again deactivated.
Dynamic monitoring of oxygen sensor's O2 concentration rise duration at transition from load to overrun. This rise duration is also affected by the oxygen sensor's time constant.
If the oxygen sensor is intact it should not be longer than 3 s.
An error is logged when the measured O2 concentration during transition from load to overrun rises too slowly, or when a limit value defined based on the operating point is not reached once the period LSU_tiWait3_CA has elapsed following the load/overrun throttle transition.
Test condition
The test routine is executed during each load-to-overrun transition when the engine is at a suitable operating point.
The following conditions must be present for the error check
- No temporary error is present in the sensor. When the error check enable is active the state machine for the error check is executed. The state machine function is active once all of the following conditions are satisfied.
- The engine RPM exceeds the limit value 900 1/min
- The injection quantity is above the minimum value 9 mg/hub
- The battery voltage is higher than 10700 mV.
Once all of the following conditions have been satisfied the state machine function changes to the following status
For a period of LSU_tiWait1_CA the injection quantity remains within the tolerance range +/- 4 mg/hub.
The state machine function proceeds to the next status provided that compliance with one of the following conditions is present
- The injection quantity decreases by more than 4 mg/hub.
- The O2 concentration rises above a limit value.
To ensure that a valid load-to-overrun transition is present, the injection quantity must now, within a period of LSU_tiWait2_CA, fall to a value below the threshold 0 mg/hub.
It must remain below this threshold until a defect or intact message is generated. Otherwise the test is aborted and the state machine becomes inactive.
Voltage condition
The test routine is executed during each load-to-overrun transition when the engine is at a suitable operating point.
The following conditions must be present for the error check
- No temporary error is present in the sensor. When the error check enable is active the state machine for the error check is executed. The state machine function is active once all of the following conditions are satisfied.
- The engine RPM exceeds the limit value 900 1/min
- The injection quantity is above the minimum value 9 mg/hub
- The battery voltage is higher than 10700 mV.
Once all of the following conditions have been satisfied the state machine function changes to the following status
For a period of LSU_tiWait1_CA the injection quantity remains within the tolerance range +/- 4 mg/hub.
The state machine function proceeds to the next status provided that compliance with one of the following conditions is present
- The injection quantity decreases by more than 4 mg/hub.
- The O2 concentration rises above a limit value.
To ensure that a valid load-to-overrun transition is present, the injection quantity must now, within a period of LSU_tiWait2_CA, fall to a value below the threshold 0 mg/hub.
It must remain below this threshold until a defect or intact message is generated. Otherwise the test is aborted and the state machine becomes inactive.
The DDE recognizes a short circuit to positive in the output stage
Oxygen sensor heating.
Test condition
The following conditions must be present for the error check
- The diagnostic function must be active.
- The pre-debounced battery voltage must be greater than 10700 mV.
Voltage condition
The following conditions must be present for the error check
- The diagnostic function must be active.
- The pre-debounced battery voltage must be greater than 10700 mV.
The DDE recognizes a short to ground at the output stage
Oxygen sensor heating.
Test condition
The following conditions must be present for the error check
- The diagnostic function must be active.
- The pre-debounced battery voltage must be greater than 10700 mV.
Voltage condition
The following conditions must be present for the error check
- The diagnostic function must be active.
- The pre-debounced battery voltage must be greater than 10700 mV.
The DDE recognizes an open-circuit error at the output stage
Oxygen sensor heating.
Test condition
The following conditions must be present for the error check
- The diagnostic function must be active.
- The pre-debounced battery voltage must be greater than 10700 mV. Voltage condition: The following conditions must be present for the error check
- The diagnostic function must be active.
- The pre-debounced battery voltage must be greater than 10700 mV.
The diagnostic trouble code is logged in the ECU when the raw voltage signal for the O2 ratio exceeds the limit value 200 mV during the oxygen signal calibration routine.
Test condition
The test runs only when the calibration function is active.
Check frequency is then continuous in accordance with the programmed time grid.
Voltage condition
The test runs only when the calibration function is active.
Check frequency is then continuous in accordance with the programmed time grid.
The diagnostic trouble code is logged in the ECU when the raw voltage signal for the O2 ratio falls below the limit value -200 mV during the oxygen signal calibration routine.
Test condition
The test runs only when the calibration function is active.
Check frequency is then continuous in accordance with the programmed time grid.
Voltage condition
The test runs only when the calibration function is active.
Check frequency is then continuous in accordance with the programmed time grid.
The diagnostic trouble code is logged in the ECU when the raw voltage signal for the O2 ratio exceeds the limit value 3200 mV during normal operation.
Test condition
The following conditions must be present for the error check
- The O2 calibration is not active.
- Oxygen sensor heater is active. Voltage condition: The following conditions must be present for the error check
- The O2 calibration is not active.
- Oxygen sensor heater is active.
The diagnostic trouble code is logged in the ECU when the raw voltage signal for the O2 ratio falls below the limit value 300 mV during normal operation.
Test condition
The following conditions must be present for the error check
- The O2 calibration is not active.
- Oxygen sensor heater is active.
- No demand for thermal regeneration may be present and the engine must remain in this condition for a period of 10000 ms.
Voltage condition
The following conditions must be present for the error check
- The O2 calibration is not active.
- Oxygen sensor heater is active.
- No demand for thermal regeneration may be present and the engine must remain in this condition for a period of 10000 ms.
Plausibility check on measured vs. calculated O2 concentration from oxygen sensor on overrun. The diagnostic trouble code is logged when the measured O2 concentration is greater than the sum of the calculated O2 concentration and a tolerance range based on operating point.
Test condition
The following conditions must be present for the plausibility check
- The plausibility check is enabled.
- The effects of injection quantity on O2 concentration are clear.
- The O2 concentration is valid.
- The calculated O2 concentration is stationary. The operating point for the overrun plausibility check is enabled when
- The engine speed lies between 850 1/min and 4000 1/min.
- The fuel injection rate lies between 0 mg/hub and 0 mg/hub.
- The air mass lies between 200 mg/Hub and 800 mg/Hub.
- The EGR must be deactivated in coasting/overrun mode.
- the EGR overrun monitoring function must be enabled for full throttle.
- the fuel tank cannot be empty.
- the battery voltage is higher than 10700 mV.
- no temporary errors have been recognized.
- no thermal particulate filter regeneration has been requested.
Once all of the above conditions have been satisfied the sum total air mass is determined by integrating the mass airflow in the current engine operating point.
The cumulative value must be below the limit value for full load (or LSU_mAirPlausEnaTst_CA#2 if the service test diagnosis is active).
The integration is restarted when one of the activation conditions indicated above is not satisfied.
The check runs continuously in a 20 ms grid.
Voltage condition
The following conditions must be present for the plausibility check
- The plausibility check is enabled.
- The effects of injection quantity on O2 concentration are clear.
- The O2 concentration is valid.
- The calculated O2 concentration is stationary. The operating point for the overrun plausibility check is enabled when
- The engine speed lies between 850 1/min and 4000 1/min.
- The fuel injection rate lies between 0 mg/hub and 0 mg/hub.
- The air mass lies between 200 mg/Hub and 800 mg/Hub.
- The EGR must be deactivated in coasting/overrun mode.
- the EGR overrun monitoring function must be enabled for full throttle.
- the fuel tank cannot be empty.
- the battery voltage is higher than 10700 mV.
- no temporary errors have been recognized.
- no thermal particulate filter regeneration has been requested.
Once all of the above conditions have been satisfied the sum total air mass is determined by integrating the mass airflow in the current engine operating point.
The cumulative value must be below the limit value for full load (or LSU_mAirPlausEnaTst_CA#2 if the service test diagnosis is active).
The integration is restarted when one of the activation conditions indicated above is not satisfied.
The check runs continuously in a 20 ms grid.
Plausibility check of measured vs. calculated oxygen sensor O2 concentration at part-load with EGR control active. The diagnostic trouble code is logged when the measured O2 concentration is greater than the sum of the calculated O2 concentration and a tolerance range based on operating point.
Test condition
The following conditions must be present for the plausibility check
- The plausibility check is enabled.
- The effects of injection quantity on O2 concentration are clear.
- The O2 concentration is valid.
- The calculated O2 concentration is stationary. The operating point for the part-load plausibility check is enabled when
- The engine speed lies between 590 1/min and 980 1/min.
- The fuel injection rate lies between 4 mg/hub and 328 mg/hub.
- The air mass lies between 180 mg/Hub and 600 mg/Hub.
- The EGR must be deactivated in coasting/overrun mode.
- the EGR overrun monitoring function must be enabled for full throttle.
- the fuel tank cannot be empty.
- the battery voltage is higher than 10700 mV.
- no thermal particulate filter regeneration has been requested.
Once all of the above conditions have been satisfied the sum total air mass is determined by integrating the mass airflow in the current engine operating point.
The cumulative value must be above the limit value for full load (or LSU_mAirPlausEnaTst_CA#1 if the service test diagnosis is active).
The integration is restarted when one of the activation conditions indicated above is not satisfied.
The check runs continuously in a 20 ms grid.
Voltage condition
The following conditions must be present for the plausibility check
- The plausibility check is enabled.
- The effects of injection quantity on O2 concentration are clear.
- The O2 concentration is valid.
- The calculated O2 concentration is stationary. The operating point for the part-load plausibility check is enabled when
- The engine speed lies between 590 1/min and 980 1/min.
- The fuel injection rate lies between 4 mg/hub and 328 mg/hub.
- The air mass lies between 180 mg/Hub and 600 mg/Hub.
- The EGR must be deactivated in coasting/overrun mode.
- the EGR overrun monitoring function must be enabled for full throttle.
- the fuel tank cannot be empty.
- the battery voltage is higher than 10700 mV.
- no thermal particulate filter regeneration has been requested.
Once all of the above conditions have been satisfied the sum total air mass is determined by integrating the mass airflow in the current engine operating point.
The cumulative value must be above the limit value for full load (or LSU_mAirPlausEnaTst_CA#1 if the service test diagnosis is active).
The integration is restarted when one of the activation conditions indicated above is not satisfied.
The check runs continuously in a 20 ms grid.
Plausibility check on measured vs. calculated O2 concentration from oxygen sensor on overrun. The diagnostic trouble code is logged when the measured O2 concentration is less than the sum of the calculated O2 concentration and a tolerance range defined based on operating point.
Test condition
The following conditions must be present for the plausibility check
- The plausibility check is enabled.
- The effects of injection quantity on O2 concentration are clear.
- The O2 concentration is valid.
- The calculated O2 concentration is stationary. The operating point for the overrun plausibility check is enabled when
- The engine speed lies between 850 1/min and 4000 1/min.
- The fuel injection rate lies between 0 mg/hub and 0 mg/hub.
- The air mass lies between 200 mg/Hub and 800 mg/Hub.
- The EGR must be deactivated in coasting/overrun mode.
- the EGR overrun monitoring function must be enabled for full throttle.
- the fuel tank cannot be empty.
- the battery voltage is higher than 10700 mV.
- no thermal particulate filter regeneration has been requested.
Once all of the above conditions have been satisfied the sum total air mass is determined by integrating the mass airflow in the current engine operating point.
The cumulative value must be above the limit value for WOT/full load (or LSU_mAirPlausEnaTst_CA#2 if the service test diagnosis is active).
The integration is restarted when one of the activation conditions indicated above is not satisfied.
The check runs continuously in a 20 ms grid.
Voltage condition
The following conditions must be present for the plausibility check
- The plausibility check is enabled.
- The effects of injection quantity on O2 concentration are clear.
- The O2 concentration is valid.
- The calculated O2 concentration is stationary.
The operating point for the overrun plausibility check is enabled when
- The engine speed lies between 850 1/min and 4000 1/min.
- The fuel injection rate lies between 0 mg/hub and 0 mg/hub.
- The air mass lies between 200 mg/Hub and 800 mg/Hub.
- The EGR must be deactivated in coasting/overrun mode.
- the EGR overrun monitoring function must be enabled for full throttle.
- the fuel tank cannot be empty.
- the battery voltage is higher than 10700 mV.
- no thermal particulate filter regeneration has been requested.
Once all of the above conditions have been satisfied the sum total air mass is determined by integrating the mass airflow in the current engine operating point.
The cumulative value must be above the limit value for WOT/full load (or LSU_mAirPlausEnaTst_CA#2 if the service test diagnosis is active).
The integration is restarted when one of the activation conditions indicated above is not satisfied.
The check runs continuously in a 20 ms grid.
Plausibility check of measured vs. calculated oxygen sensor O2 concentration at part-load with EGR control active. The diagnostic trouble code is logged when the measured O2 concentration is less than the sum of the calculated O2 concentration and a tolerance range defined based on operating point.
Test condition
The following conditions must be present for the plausibility check
- The plausibility check is enabled.
- The effects of injection quantity on O2 concentration are clear.
- The O2 concentration is
- The calculated O2 concentration is stationary.
The operating point for the part-load plausibility check is enabled when
- The engine speed lies between 590 1/min and 980 1/min.
- The fuel injection rate lies between 4 mg/hub and 328 mg/hub.
- The air mass lies between 180 mg/Hub and 600 mg/Hub.
- The EGR must be deactivated in coasting/overrun mode.
- the EGR overrun monitoring function must be enabled for full throttle.
- The fuel tank cannot be empty.
- The battery voltage is higher than 10700 mV.
- No thermal particulate filter regeneration has been requested.
Once all of the above conditions have been satisfied the sum total air mass is determined by integrating the mass airflow in the current engine operating point.
The cumulative value must be above the limit value for full load (or LSU_mAirPlausEnaTst_CA#1 if the service test diagnosis is active).
The integration is restarted when one of the activation conditions indicated above is not satisfied.
The check runs continuously in a 20 ms grid.
Voltage condition
The following conditions must be present for the plausibility check
- The plausibility check is enabled.
- The effects of injection quantity on O2 concentration are clear.
- The O2 concentration is
- The calculated O2 concentration is stationary.
The operating point for the part-load plausibility check is enabled when
- The engine speed lies between 590 1/min and 980 1/min.
- The fuel injection rate lies between 4 mg/hub and 328 mg/hub.
- The air mass lies between 180 mg/Hub and 600 mg/Hub.
- The EGR must be deactivated in coasting/overrun mode.
- the EGR overrun monitoring function must be enabled for full throttle.
- The fuel tank cannot be empty.
- The battery voltage is higher than 10700 mV.
- No thermal particulate filter regeneration has been requested.
Once all of the above conditions have been satisfied the sum total air mass is determined by integrating the mass airflow in the current engine operating point.
The cumulative value must be above the limit value for full load (or LSU_mAirPlausEnaTst_CA#1 if the service test diagnosis is active).
The integration is restarted when one of the activation conditions indicated above is not satisfied.
The check runs continuously in a 20 ms grid.
Oxygen sensor chip diagnosis. The diagnostic trouble code is logged in the ECU when the value read from the chip's initialization register varies from the value written to the chip in the previous time interval.
Test condition
Check frequency is continuous in accordance with the programmed time grid.
Voltage condition
Check frequency is continuous in accordance with the programmed time grid.
The DDE recognizes a short circuit to positive in the output stage
Oxygen sensor wiring.
Test condition
The following conditions must be met for the error check
- No internal errors may be present in the output stage.
- The open-circuit diagnosis is not active.
Voltage condition
The following conditions must be met for the error check
- No internal errors may be present in the output stage.
- The open-circuit diagnosis is not active.
The DDE recognizes a short to ground at the output stage
Oxygen sensor wiring.
Test condition
The following conditions must be met for the error check
- No internal errors may be present in the output stage.
- The open-circuit diagnosis is not active.
Voltage condition
The following conditions must be met for the error check
- No internal errors may be present in the output stage.
- The open-circuit diagnosis is not active.
Oxygen sensor heater diagnosis. The diagnostic trouble code is logged in the ECU when the calculated oxygen sensor temperature is greater than or equal to the limit value 840 °C.
Test condition
The error check is implemented when the following conditions are satisfied
- The debounced value for battery voltage is greater than the limit value 10700 mV. The debounce times for the battery voltage are 0 ms and 2000 ms.
- No overrun is detected. The debounce times for overrun detection are 100 ms and 100 ms.
- The heater control is active.
- The oxygen sensor resistance signal Ri is valid.
- No other fault is present.
- The heating does not detect shunt current.
Voltage condition
The error check is implemented when the following conditions are satisfied
- The debounced value for battery voltage is greater than the limit value 10700 mV. The debounce times for the battery voltage are 0 ms and 2000 ms.
- No overrun is detected. The debounce times for overrun detection are 100 ms and 100 ms.
- The heater control is active.
- The oxygen sensor resistance signal Ri is valid.
- No other fault is present.
- The heating does not detect shunt current.
Oxygen sensor heater diagnosis. The diagnostic trouble code is logged in the ECU when the calculated oxygen sensor temperature is less than or equal to the limit value 720 °C.
Test condition
The error check is implemented when the following conditions are satisfied
- The debounced value for battery voltage is greater than the limit value 10700 mV. The debounce times for the battery voltage are 0 ms and 2000 ms.
- No overrun is detected. The debounce times for overrun detection are 100 ms and 100 ms.
- The heater control is active.
- The oxygen sensor resistance signal Ri is valid.
- No other fault is present.
- The heating does not detect shunt current.
Voltage condition
The error check is implemented when the following conditions are satisfied
- The debounced value for battery voltage is greater than the limit value 10700 mV. The debounce times for the battery voltage are 0 ms and 2000 ms.
- No overrun is detected. The debounce times for overrun detection are 100 ms and 100 ms.
- The heater control is active.
- The oxygen sensor resistance signal Ri is valid.
- No other fault is present.
- The heating does not detect shunt current.
Error opening main relay. The system is monitored to determine whether the main relay has been opened without a command from the DDE (prior to termination of post-operational shutdown phase).
If the main relay opens when it should remain closed the counter advances by one each time the ECU boots. This counter is stored in the EEPROM.
The diagnostic trouble code is logged when the counter total rises above the threshold 1.
Test condition
This test is executed one time during initialization of the ECU.
Voltage condition
This test is executed one time during initialization of the ECU.
Error opening main relay. Response is monitored to determine whether the main relay is sticking.
The relay is recognized as sticking when the battery voltage following the command to open the main relay and the elapsed lag time 100 ms are greater than the threshold.
Test condition
The main relay diagnosis to check for a sticking relay is executed when a command to open the relay is present.
Voltage condition
The main relay diagnosis to check for a sticking relay is executed when a command to open the relay is present.
The DDE recognizes an open-circuit error at the output stage
Flow control valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short to positive error at the fuel-quantity control valve.
Metering unit.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes short circuit to ground error in the output stage
Fuel-quantity control valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
Ignition miss detection. If within a calculated number of engine crankshaft revolutions (numbered of processed blocks x number of revolutions per block): 45 x 15) at least 281 ignition miss events are counted and miss is detected at only one cylinder, then the diagnostic trouble code is logged.
none
Ignition miss detection. If within a calculated number of engine crankshaft revolutions (numbered of processed blocks x number of revolutions per block): 45 x 15) at least 281 ignition miss events are counted and miss is detected at only one cylinder, then the diagnostic trouble code is logged.
none
Ignition miss detection. If within a calculated number of engine crankshaft revolutions (numbered of processed blocks x number of revolutions per block): 45 x 15) at least 281 ignition miss events are counted and miss is detected at only one cylinder, then the diagnostic trouble code is logged.
none
Ignition miss detection. If within a calculated number of engine crankshaft revolutions (numbered of processed blocks x number of revolutions per block): 45 x 15) at least 281 ignition miss events are counted and miss is detected at only one cylinder, then the diagnostic trouble code is logged.
none
Ignition miss detection. If within a calculated number of engine crankshaft revolutions (numbered of processed blocks x number of revolutions per block): 45 x 15) at least 281 ignition miss events are counted and miss is detected at only one cylinder, then the diagnostic trouble code is logged.
none
Ignition miss detection. If within a calculated number of engine crankshaft revolutions (numbered of processed blocks x number of revolutions per block): 45 x 15) at least 281 ignition miss events are counted and miss is detected at only one cylinder, then the diagnostic trouble code is logged.
none
Ignition miss detection on multiple cylinders. If within a calculated number of engine crankshaft revolutions (numbered of processed blocks x number of revolutions per block: 45 x 15) at least 281 ignition miss events are counted and miss is detected at more than one cylinder, then the diagnostic trouble code is logged.
none
Test condition
Voltage condition
Monitoring of NOx offset learning function at NOx sensor 1 (before SCR). The error is recognized when the learned NOx offset value ppm falls below the limit -20 ppm.
Test condition
Continuous according to defined time grid when the offset test is enabled
- Enabled in application 0== 0.
- The test is executed with a falling flank of.
and when the following conditions are satisfied
- The absolute difference between the maximum ppm and minimum ppm NOx offset value is less than 2 ppm.
- ppm is greater than 0 ppm.
- The averaged offset value ppm lies within the monitoring window -30 ppm and 30 ppm.
Voltage condition
Continuous according to defined time grid when the offset test is enabled
- Enabled in application 0== 0.
- The test is executed with a falling flank of.
and when the following conditions are satisfied
- The absolute difference between the maximum ppm and minimum ppm NOx offset value is less than 2 ppm.
- ppm is greater than 0 ppm.
- The averaged offset value ppm lies within the monitoring window -30 ppm and 30 ppm.
Monitoring of NOx offset learning function at NOx sensor 2 (behind SCR). The error is recognized when the learned NOx offset value ppm rises above the limit value 20 ppm.
Test condition
Continuous according to defined time grid when the offset test is enabled
- Enabled in application 0== 0.
- The test is executed on a falling flank of.
and when the following conditions are satisfied
- The absolute difference between the maximum ppm and minimum ppm NOx offset value is less than 2 ppm.
- ppm is greater than 0 ppm.
- The averaged offset value ppm lies within the monitoring window -30 ppm and 30 ppm.
Voltage condition
Continuous according to defined time grid when the offset test is enabled
- Enabled in application 0== 0.
- The test is executed on a falling flank of.
and when the following conditions are satisfied
- The absolute difference between the maximum ppm and minimum ppm NOx offset value is less than 2 ppm.
- ppm is greater than 0 ppm.
- The averaged offset value ppm lies within the monitoring window -30 ppm and 30 ppm.
Monitoring of NOx offset learning function at NOx sensor 2 (behind SCR). The error is recognized when the learned NOx offset value ppm rises above the limit value 20 ppm.
Test condition
Continuous according to defined time grid when the offset test is enabled
- Enabled in application 0== 0.
- The test is executed on a falling flank of.
and when the following conditions are satisfied
- The absolute difference between the maximum ppm and minimum ppm NOx offset value is less than 2 ppm.
- ppm is greater than 0 ppm.
- The averaged offset value ppm lies within the monitoring window -30 ppm and 30 ppm.
Voltage condition
Continuous according to defined time grid when the offset test is enabled
- Enabled in application 0== 0.
- The test is executed on a falling flank of.
and when the following conditions are satisfied
- The absolute difference between the maximum ppm and minimum ppm NOx offset value is less than 2 ppm.
- ppm is greater than 0 ppm.
- The averaged offset value ppm lies within the monitoring window -30 ppm and 30 ppm.
Dynamic monitoring of NOx sensor before the SCR converter. The dynamic monitoring function evaluates the temporal progression of the NOx signal during the transition from acceleration to overrun. With an intact sensor the time constant should not be greater than 7 s.
Once trailing throttle/overrun is detected, the monitoring function proceeds through the following sequence
A timer starts when the NOx concentration rises above the first threshold defined according to operating point, which corresponds to 30% of the anticipated drop in NOx concentration.
The timer stops when the NOx concentration rises above the second threshold defined according to operating point, representing 60% of the expected level of NOx concentration.
A sensor dynamics error is logged if the NOx sensor is unable to attain the second threshold value after 7 s elapses.
A sensor dynamics error is also logged when 9 s elapses without the second threshold value being exceeded.
Test condition
The test routine runs when the following conditions are satisfied
- Dynamic testing enabled.
- The status of the NOx sensors is valid.
- No diagnostic trouble codes have been logged for the NOx sensor and EGR.
Once these general conditions are satisfied the state machine function starts, provided that
- engine RPM is greater than 1650 1/min.
- the injection quantity is greater than setpoint
- the shift in the NOx concentration is greater than 80 ppm.
To ensure recognition of a valid load/overrun transition, the injection quantity must now, within a period of 2 s, fall to a value below the threshold 1 mg/hub.
Once compliance with these conditions is present a valid load/overrun transition is recognized and the monitoring function is enabled.
Voltage condition
The test routine runs when the following conditions are satisfied
- Dynamic testing enabled.
- The status of the NOx sensors is valid.
- No diagnostic trouble codes have been logged for the NOx sensor and EGR.
Once these general conditions are satisfied the state machine function starts, provided that
- engine RPM is greater than 1650 1/min.
- the injection quantity is greater than setpoint.
- the shift in the NOx concentration is greater than 80 ppm.
To ensure recognition of a valid load/overrun transition, the injection quantity must now, within a period of 2 s, fall to a value below the threshold 1 mg/hub.
Once compliance with these conditions is present a valid load/overrun transition is recognized and the monitoring function is enabled.
The NOx status signal from NOx sensor 1 (before SCR converter) reports an error: ==0.
This is the case when at least one of the following conditions is applicable
- The debounced CAN status of the raw NOx sensor value is invalid ==0.
- There is an NOx signal error is disabled
- Lambda signal from NOx sensor 1 (before SCR converter) is not present, lean exhaust gas ==0.
Test condition
The error check runs when compliance with the following conditions is present (==1)
- A positive flank of the signal has been detected.
- This is a case of lean combustion == 1.
- The NOx sensor diagnosis is enabled ==1
- No plausibility or electrical error related to the NOx sensor has occurred is not disabled.
- Engine status ==RUNNING.
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check runs when compliance with the following conditions is present (==1)
- A positive flank of the signal has been detected.
- This is a case of lean combustion == 1.
- The NOx sensor diagnosis is enabled ==1
- No plausibility or electrical error related to the NOx sensor has occurred is not disabled.
- Engine status ==RUNNING.
The error check proceeds continuously according to the programmed process grid.
Monitoring of NOx signal offset value (NOx sensor 1 before SCR). The diagnostic trouble code is logged when the average offset value exceeds the limit of 30 ppm. The offset is calculated by averaging the pressure-compensated signal with the constant 1.
Test condition
The test routine is executed when the signal flank rises for a duration of 6 s. Within this time frame the absolute difference between the maximum and minimum NOx value must be less than 2 ppm. Once the diagnostic function is enabled the test routine is executed continuously in accordance with the defined process grid.
Voltage condition
The test routine is executed when the signal flank rises for a duration of 6 s. Within this time frame the absolute difference between the maximum and minimum NOx value must be less than 2 ppm. Once the diagnostic function is enabled the test routine is executed continuously in accordance with the defined process grid.
Monitoring of NOx signal offset value (NOx sensor 1 before SCR). The diagnostic trouble code is logged when the average offset falls below the limit of -30 ppm. The offset is calculated by averaging the pressure-compensated signal ppm with the constant 1.
Test condition
The test routine is executed when the signal flank rises for a duration of 6 s. Within this time frame the absolute difference between the maximum and minimum NOx value must be less than 2 ppm. Once the diagnostic function is enabled the test routine is executed continuously in accordance with the defined process grid.
Voltage condition
The test routine is executed when the signal flank rises for a duration of 6 s. Within this time frame the absolute difference between the maximum and minimum NOx value must be less than 2 ppm. Once the diagnostic function is enabled the test routine is executed continuously in accordance with the defined process grid.
Timeout error in NOx heater temperature message for heater for NOx sensor before SCR converter.
A message failure is recognized when the sensor is not ready and no valid status signal is transmitted.
Test condition
The error is evaluated just once at the start of the driving cycle after the dew point has been reached and while the NOx sensor heater diagnosis is activated.
Voltage condition
The error is evaluated just once at the start of the driving cycle after the dew point has been reached and while the NOx sensor heater diagnosis is activated.
The diagnostic trouble code is logged when the physical NOx signal from NOx sensor 1 (before SRC catalyst) is greater than the limit value 1650 ppm.
Test condition
The test routine is executed when a valid NOx signal has been received.
Voltage condition
The test routine is executed when a valid NOx signal has been received.
The diagnostic trouble code is logged when the physical NOx signal from NOx sensors 1 (before SCR cat) is less than the specified limit 1650 ppm.
Test condition
The test routine is executed when a valid NOx signal has been received.
Voltage condition
The test routine is executed when a valid NOx signal has been received.
The error is recognized when NOx sensor 1 (before SCR converter) transmits a load drop error (linear, binary lambda value, NOx signal or heater circuit) via the CAN.
This is the case when at least one of the following error conditions has been recognized
- NOx sensor wire open == 1
- Linear lambda wire open == 1
- Binary lambda wire open == 1
- Open wire in heater == 1
Test condition
The following conditions must be satisfied before the NOx sensor diagnosis function is enabled == 1
- Heater diagnosis enabled == 1
- NOx sensor heater temperature has reached specified temperature. == 1
- No electrical malfunctions have been detected is locked.
Voltage condition
The following conditions must be satisfied before the NOx sensor diagnosis function is enabled == 1
- Heater diagnosis enabled == 1
- NOx sensor heater temperature has reached specified temperature. == 1
- No electrical malfunctions have been detected is locked.
The error is recognized when NOx sensor 1 (before SCR converter) transmits a short circuit error (linear, binary lambda value, NOx signal or heater circuit) via the CAN.
This is the case when at least one of the following error conditions has been recognized
- NOx sensor short circuit == 1
- Linear lambda short circuit == 1
- Binary lambda short circuit == 1
- Short circuit in heater == 1
Test condition
The following conditions must be satisfied before the NOx sensor diagnosis function is enabled == 1
- Heater diagnosis enabled == 1
- NOx sensor heater temperature has reached specified temperature. == 1
- No electrical malfunctions have been detected is locked.
Voltage condition
The following conditions must be satisfied before the NOx sensor diagnosis function is enabled == 1
- Heater diagnosis enabled == 1
- NOx sensor heater temperature has reached specified temperature. == 1
- No electrical malfunctions have been detected is locked.
The NOx status signal of the NOx sensors behind SCR converter reports a malfunction.
This is the case when at least one of the following conditions is applicable
- The debounced CAN status of the raw NOx sensor value is invalid ==0.
- There is an NOx signal error is disabled
- Lambda signal from NOx sensor 2 (behind SCR converter) is not present, lean exhaust gas ==0.
Test condition
The error check runs when compliance with the following conditions is present (==1)
- A positive flank of the signal has been detected.
- This is a case of lean combustion == 1.
- The NOx sensor diagnosis is enabled ==1
- No plausibility or electrical error related to the NOx sensor has occurred is not disabled.
- Engine status ==RUNNING.
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check runs when compliance with the following conditions is present (==1)
- A positive flank of the signal has been detected.
- This is a case of lean combustion == 1.
- The NOx sensor diagnosis is enabled ==1
- No plausibility or electrical error related to the NOx sensor has occurred is not disabled.
- Engine status ==RUNNING.
The error check proceeds continuously according to the programmed process grid.
The diagnostic trouble code is logged when the signal from the NOx sensors behind the SCR converter rises above the limit 2.
Test condition
The test routine is executed when a valid linear lambda signal has been received.
Voltage condition
The test routine is executed when a valid linear lambda signal has been received.
The diagnostic trouble code is logged when the signal from the NOs sensor behind the SCR converter falls below the limit 0.
Test condition
The test routine is executed when a valid linear lambda signal has been received.
Voltage condition
The test routine is executed when a valid linear lambda signal has been received.
Plausibility check on NOx sensor 2 (behind SCR) lambda signal in coasting/overrun mode. The error is recognized when the lambda signal rises above the limit 0.
Test condition
The following conditions must be met before the error check can be active
- Sensor diagnosis is active: ==1.
- No errors in the linear lambda signal have been reported is not locked.
- The vehicle is in coasting/overrun mode == 1 for the period 5000 ms.
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The following conditions must be met before the error check can be active
- Sensor diagnosis is active: ==1.
- No errors in the linear lambda signal have been reported is not locked.
- The vehicle is in coasting/overrun mode == 1 for the period 5000 ms.
The error check proceeds continuously according to the programmed process grid.
Plausibility check on NOx sensor (sensor 2 behind SCR) lambda signal in coasting/overrun mode. If the lambda signal falls below the limit value 0 the error DFC_NoCat2DsLamPlausMin is recognized.
Test condition
The following conditions must be met before the error check can be active: Sensor diagnosis is active: ==TRUE. No errors related to the linear lambda signal are reported DINH_stFId.FId_NoCat2DsOvrRunPlaus.5==FALSE The vehicle is in coasting/overrun mode (==TRUE) for the period 5000 ms The error check proceeds continuously in the defined process grid provided that diagnosis has been enabled.
Voltage condition
The following conditions must be met before the error check can be active: Sensor diagnosis is active: ==TRUE. No errors related to the linear lambda signal are reported DINH_stFId.FId_NoCat2DsOvrRunPlaus.5==FALSE The vehicle is in coasting/overrun mode (==TRUE) for the period 5000 ms The error check proceeds continuously in the defined process grid provided that diagnosis has been enabled.
Monitoring of NOx signal offset value (NOx sensor 2 behind SCR). The diagnostic trouble code is logged when the average offset value exceeds the limit of 30 ppm. The offset is calculated by averaging the pressure-compensated signal with the constant 1.
Test condition
The test routine is executed when the signal flank rises for a duration of Exh_tiNOxOfsTstVldNoCat2Ds. Within this time frame the absolute difference between the maximum and minimum NOx value must be less than 2 ppm. Once the diagnostic function is enabled the test routine is executed continuously in accordance with the defined process grid.
Voltage condition
The test routine is executed when the signal flank rises for a duration of Exh_tiNOxOfsTstVldNoCat2Ds. Within this time frame the absolute difference between the maximum and minimum NOx value must be less than 2 ppm. Once the diagnostic function is enabled the test routine is executed continuously in accordance with the defined process grid.
Monitoring of NOx signal offset value (NOx sensor 2 behind SCR). The diagnostic trouble code is logged when the average offset falls below the limit of -30 ppm. The offset is calculated by averaging the pressure-compensated signal with the constant 1.
Test condition
The test routine is executed when the signal flank rises for a duration of Exh_tiNOxOfsTstVldNoCat2Ds. Within this time frame the absolute difference between the maximum and minimum NOx value must be less than 2 ppm. Once the diagnostic function is enabled the test routine is executed continuously in accordance with the defined process grid.
Voltage condition
The test routine is executed when the signal flank rises for a duration of Exh_tiNOxOfsTstVldNoCat2Ds. Within this time frame the absolute difference between the maximum and minimum NOx value must be less than 2 ppm. Once the diagnostic function is enabled the test routine is executed continuously in accordance with the defined process grid.
Monitoring NOx signal ready status of NOx sensor behind SCR converter.
The diagnostic trouble code is logged when the NOx sensor is ready and does not transmit any valid NOx status information for at least 10000 ms.
Test condition
The error is evaluated just once at the start of the driving cycle after the dew point has been reached and while the NOx sensor heater diagnosis is activated.
Voltage condition
The error is evaluated just once at the start of the driving cycle after the dew point has been reached and while the NOx sensor heater diagnosis is activated.
The diagnostic trouble code is logged when the physical NOx signal from NOx sensor 2 (behind SCR catalyst) is greater than the limit 1650 ppm.
Test condition
The test routine is executed when a valid NOx signal has been received.
Voltage condition
The test routine is executed when a valid NOx signal has been received.
The diagnostic trouble code is logged when the physical NOx signal from NOx sensor 2 (behind SCR converter) is less than the limit 1650 ppm.
Test condition
The test routine is executed when a valid NOx signal has been received.
Voltage condition
The test routine is executed when a valid NOx signal has been received.
The error is recognized when NOx sensor 2 (behind SCR converter) transmits a load drop error (linear, binary lambda value, NOx signal or heater circuit) on the CAN.
This is the case when at least one of the following error conditions has been recognized
- NOx sensor wire open == 1
- Linear lambda wire open == 1
- Binary lambda wire open == 1
- Open wire in heater == 1
Test condition
The following conditions must be satisfied before the NOx sensor diagnosis function is enabled == 1
- Heater diagnosis enabled == 1
- NOx sensor heater temperature has reached specified temperature. == 1
- No electrical malfunctions have been detected is locked.
Voltage condition
The following conditions must be satisfied before the NOx sensor diagnosis function is enabled == 1
- Heater diagnosis enabled == 1
- NOx sensor heater temperature has reached specified temperature. == 1
- No electrical malfunctions have been detected is locked.
The error is recognized when NOx sensor 2 (behind SCR converter) transmits a short circuit error (linear, binary lambda value, NOx signal or heater circuit) on the CAN.
This is the case when at least one of the following error conditions has been recognized
- NOx sensor short circuit == 1
- Linear lambda short circuit == 1
- Binary lambda short circuit == 1
- Short circuit in heater == 1
Test condition
The following conditions must be satisfied before the NOx sensor diagnosis function is enabled == 1
- Heater diagnosis enabled == 1
- NOx sensor heater temperature has reached specified temperature. == 1
- No electrical malfunctions have been detected is locked.
Voltage condition
The following conditions must be satisfied before the NOx sensor diagnosis function is enabled == 1
- Heater diagnosis enabled == 1
- NOx sensor heater temperature has reached specified temperature. == 1
- No electrical malfunctions have been detected is locked.
Exhaust backpressure offset monitor.
If the differential between ambient barometric pressure and the pressure before the particulate filter exceeds 32767 mbar, or the absolute value of the adapted raw pressure value is greater than 30 mbar the DTC is entered.
Test condition
The error check is performed when
- Following engine stationary, with ECU in shutdown phase and following completion of waiting time 4 s for the period 10 s.
Voltage condition
The error check is performed when
- Following engine stationary, with ECU in shutdown phase and following completion of waiting time 4 s for the period 10 s.
Monitoring of the oxidation catalyst in warm-up mode. The DTC is logged when the calculated conversion rate lies below the limit value 0.
Test condition
The monitoring routine executes when the following conditions are satisfied
- No other DTCs are logged.
- The oxidation catalyst's surface temperature is above the minimum limit value 120 °C.
- The oxidation catalyst surface temperature's gradient is above the minimum limit value.
- Engine running.
- The quantity of fuel consumed since the last particulate filter regeneration is below the threshold 328 l.
- Temperature model is sufficiently precise: Difference between the measured and modeled temperatures behind the oxidation catalyst is less than 500 °C.
- No calculation of HC conversion rate and no monitoring have taken place in this driving cycle.
- Mass flow rate lies above the threshold 0 kg/h.
Conditions for aborting the process: The test is executed provided that none of the following conditions lead to mandatory cancellation
- Enable conditions are satisfied.
- Warm-up mode active for less than maximum threshold (maximum threshold between 20 sec. at 0 °C and 300 sec. at 200 °C and above). The time is reset when the HC conversion-rate calculation is not enabled or when a change in operating mode affecting assessment of the HC conversion rate is detected.
Trigger condition: The diagnostic routine executes one time only after the following conditions are satisfied
- Cumulative exhaust-gas mass flow rate during the monitoring is less than setpoint. Generation of a cumulative current exhaust-gas mass flow rate continues for as long as monitoring remains enabled.
Trigger
- Cumulative HC quantity during the oxidation catalyst's warm-up phase is above 2 g. Generation of a cumulative current exhaust-gas mass flow rate continues for as long as the HC conversion rate calculation remains enabled.
- Oxidation catalyst's surface temperature lies above -3550 °C.
Once all conditions are satisfied the error is checked one time with the positive flank.
Voltage condition
The monitoring routine executes when the following conditions are satisfied
- No other DTCs are logged.
- The oxidation catalyst's surface temperature is above the minimum limit value 120 °C.
- The oxidation catalyst surface temperature's gradient is above the minimum limit value.
- Engine running.
- The quantity of fuel consumed since the last particulate filter regeneration is below the threshold 328 l.
- Temperature model is sufficiently precise: Difference between the measured and modeled temperatures behind the oxidation catalyst is less than 500 °C.
- No calculation of HC conversion rate and no monitoring have taken place in this driving cycle.
- Mass flow rate lies above the threshold 0 kg/h.
Conditions for aborting the process: The test is executed provided that none of the following conditions lead to mandatory cancellation
- Enable conditions are satisfied.
- Warm-up mode active for less than maximum threshold (maximum threshold between 20 sec. at 0 °C and 300 sec. at 200 °C and above). The time is reset when the HC conversion-rate calculation is not enabled or when a change in operating mode affecting assessment of the HC conversion rate is detected.
Trigger condition: The diagnostic routine executes one time only after the following conditions are satisfied
- Cumulative exhaust-gas mass flow rate during the monitoring is less than setpoint. Generation of a cumulative current exhaust-gas mass flow rate continues for as long as monitoring remains enabled.
Trigger
- Cumulative HC quantity during the oxidation catalyst's warm-up phase is above 2 g. Generation of a cumulative current exhaust-gas mass flow rate continues for as long as the HC conversion rate calculation remains enabled.
- Oxidation catalyst's surface temperature lies above -3550 °C.
Once all conditions are satisfied the error is checked one time with the positive flank.
Monitoring of low-pressure boost pressure control. A positive control deviation (boost pressure too low) is recognized when the low-pressure boost-control deviation is greater than a limit defined according to the instantaneous operational status.
The limit for monitoring the control deviation is determined using a program map and is based on engine speed and injection quantity or internal torque.
Test condition
Monitoring for persistent control deviation is implemented when the engine is in operating range 3 or 4 and the low-pressure boost-pressure control is active.
- Operating range 3 is active when the injection quantity exceeds 22 mg/hub and the engine speed is greater than 2500 1/min.
- Operating range 4 is active when the injection quantity exceeds 35 mg/hub and the engine speed is greater than 4000 1/min.
When compliance with the above conditions is present, the error is checked continuously once the debounce time has elapsed.
Voltage condition
Monitoring for persistent control deviation is implemented when the engine is in operating range 3 or 4 and the low-pressure boost-pressure control is active.
- Operating range 3 is active when the injection quantity exceeds 22 mg/hub and the engine speed is greater than 2500 1/min.
- Operating range 4 is active when the injection quantity exceeds 35 mg/hub and the engine speed is greater than 4000 1/min.
When compliance with the above conditions is present, the error is checked continuously once the debounce time has elapsed.
Monitoring of low-pressure boost pressure control. A negative control deviation (boost pressure too high) is recognized when the low-pressure boost-control deviation is less than a limit defined according to the instantaneous operational status.
The limit for monitoring the control deviation is determined using a program map and is based on engine speed and injection quantity or internal torque.
Test condition
Monitoring for persistent control deviation is implemented when the engine is in operating range 3 or 4 and the low-pressure boost-pressure control is active.
- Operating range 3 is active when the injection quantity exceeds 22 mg/hub and the engine speed is greater than 2500 1/min.
- Operating range 4 is active when the injection quantity exceeds 35 mg/hub and the engine speed is greater than 4000 1/min.
When compliance with the above conditions is present, the error is checked continuously once the debounce time has elapsed.
Voltage condition
Monitoring for persistent control deviation is implemented when the engine is in operating range 3 or 4 and the low-pressure boost-pressure control is active.
- Operating range 3 is active when the injection quantity exceeds 22 mg/hub and the engine speed is greater than 2500 1/min.
- Operating range 4 is active when the injection quantity exceeds 35 mg/hub and the engine speed is greater than 4000 1/min.
When compliance with the above conditions is present, the error is checked continuously once the debounce time has elapsed.
Boost-pressure control monitoring. A positive control deviation (boost pressure too low) is recognized when the boost-control deviation is greater than a limit defined based on instantaneous operational status.
The upper limit for monitoring the boost-pressure control deviation is derived from a program map, depends on engine RPM and injection quantity, and lies at roughly 450 hPa.
Test condition
Monitoring for persistent control deviation is implemented when the engine is in operating range 3 or 4.
- Operating range 3 is active when the injection quantity exceeds 10 mg/hub and the engine speed is greater than 1400 1/min.
- Operating range 4 is active when the injection quantity exceeds 100 mg/hub and the engine speed is greater than 6000 1/min.
Voltage condition
Monitoring for persistent control deviation is implemented when the engine is in operating range 3 or 4.
- Operating range 3 is active when the injection quantity exceeds 10 mg/hub and the engine speed is greater than 1400 1/min.
- Operating range 4 is active when the injection quantity exceeds 100 mg/hub and the engine speed is greater than 6000 1/min.
Boost-pressure control monitoring. A negative control deviation (boost pressure too high) is recognized when the boost-control deviation is below the lower limit.
The lower limit for monitoring the boost-pressure control deviation is derived from a program map, depends on engine RPM and injection quantity, and lies at roughly -200 hPa.
Test condition
Monitoring for persistent control deviation is implemented when the engine is in operating range 3 or 4.
- Operating range 3 is active when the injection quantity exceeds 10 mg/hub and the engine speed is greater than 1400 1/min.
- Operating range 4 is active when the injection quantity exceeds 100 mg/hub and the engine speed is greater than 6000 1/min.
Voltage condition
Monitoring for persistent control deviation is implemented when the engine is in operating range 3 or 4.
- Operating range 3 is active when the injection quantity exceeds 10 mg/hub and the engine speed is greater than 1400 1/min.
- Operating range 4 is active when the injection quantity exceeds 100 mg/hub and the engine speed is greater than 6000 1/min.
The DDE recognizes an open circuit error in the output stage for the rail pressure control valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short circuit to positive error in the output stage
Rail-pressure control valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The hardware recognizes a short to ground error in the output stage
Rail-pressure control valve.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
If the learned adaptation factor for the rail pressure control valve is greater than or equal to the upper limit 1 the diagnostic trouble code is logged. This means that the system has drifted and the learned value has reached the maximum limit.
Test condition
The adaptation factor is calculated only one time in each driving cycle. The rail pressure control system must be operating in closed-loop pressure control mode.
Voltage condition
The adaptation factor is calculated only one time in each driving cycle. The rail pressure control system must be operating in closed-loop pressure control mode.
If the learned adaptation factor for the rail pressure control valve is less than or equal to the lower limit 1 a diagnostic trouble code is logged. This means that the system has drifted and the learned value has reached the minimum limit.
Test condition
The adaptation factor is calculated only one time in each driving cycle. The rail pressure control system must be operating in closed-loop pressure control mode.
Voltage condition
The adaptation factor is calculated only one time in each driving cycle. The rail pressure control system must be operating in closed-loop pressure control mode.
Plausibilities of ambient pressure sensor with exhaust-gas pressure and boost pressure.
The diagnostic trouble code is logged when the difference between the ambient barometric pressure and the average of boost pressure and exhaust-gas pressure is above the limit 130 mbar and these reference pressures are roughly equal (difference less than 150 mbar).
Test condition
The plausibility test runs when one of the valid operating ranges is active
Engine in standby mode: Status transition from wake-up for at least 0 s.
Terminal 15 on
- Terminal 15 on for at least 400 ms.
- Engine RPM lower than 0 1/min.
Engine in start phase
- Engine speed between 16384 1/min and 16384 1/min.
- Terminal 50 active.
During extended idling phase and with low particulate filter content
- Engine running.
- Operating range valid for at least 200 ms.
- Engine speed between 10 1/min and 10 1/min.
- Injection quantity lies between 0 mg/Hub and 328 mg/Hub.
- Throttle valve value less than 100 %.
- Maximum value for particulate filter load quantity less than 0 g.
- Period since last regeneration greater than 200 s.
- Vehicle speed less than 10 km/h.
Engine is in shutdown phase for at least 2500 ms.
Voltage condition
The plausibility test runs when one of the valid operating ranges is active
Engine in standby mode: Status transition from wake-up for at least 0 s.
Terminal 15 on
- Terminal 15 on for at least 400 ms.
- Engine RPM lower than 0 1/min.
Engine in start phase
- Engine speed between 16384 1/min and 16384 1/min.
- Terminal 50 active.
During extended idling phase and with low particulate filter content
- Engine running.
- Operating range valid for at least 200 ms.
- Engine speed between 10 1/min and 10 1/min.
- Injection quantity lies between 0 mg/Hub and 328 mg/Hub.
- Throttle valve value less than 100 %.
- Maximum value for particulate filter load quantity less than 0 g.
- Period since last regeneration greater than 200 s.
- Vehicle speed less than 10 km/h.
Engine is in shutdown phase for at least 2500 ms.
Under certain operating conditions (start, shutdown, specific operating points) the pressures from ambient barometric pressure sensor, exhaust-gas backpressure sensor and boost-pressure sensor are checked for mutual plausibility. If the ambient pressure is farther than -130 mbar from the other two pressures and if their difference is less than 150 mbar the ambient pressure sensor is registered as defective.
Test condition
The plausibility test runs when one of the valid operating ranges is active
Engine in standby mode: Status transition from wake-up for at least 0 s.
Terminal 15 on
- Terminal 15 on for at least 400 ms.
- Engine RPM lower than 0 1/min.
Engine in start phase
- Engine RPM lies between 16384 1/min and 16384 1/min.
- Terminal 50 active.
During extended idling phase and with low particulate filter content
- Engine running.
- Operating range is valid for at least 200 ms.
- Engine speed lies between 10 1/min and 10 1/min.
- Injection quantity lies between 0 mg/Hub and 328 mg/Hub.
- Throttle valve value less than 100 %.
- Maximum value for particulate filter load quantity less than 0 g.
- Period since last particulate filter regeneration greater than 200 s.
- Vehicle speed less than 10 km/h.
Engine is in shutdown phase for at least 2500 ms.
Voltage condition
The plausibility test runs when one of the valid operating ranges is active
Engine in standby mode: Status transition from wake-up for at least 0 s.
Terminal 15 on
- Terminal 15 on for at least 400 ms.
- Engine RPM lower than 0 1/min.
Engine in start phase
- Engine RPM lies between 16384 1/min and 16384 1/min.
- Terminal 50 active.
During extended idling phase and with low particulate filter content
- Engine running.
- Operating range is valid for at least 200 ms.
- Engine speed lies between 10 1/min and 10 1/min.
- Injection quantity lies between 0 mg/Hub and 328 mg/Hub.
- Throttle valve value less than 100 %.
- Maximum value for particulate filter load quantity less than 0 g.
- Period since last particulate filter regeneration greater than 200 s.
- Vehicle speed less than 10 km/h.
Engine is in shutdown phase for at least 2500 ms.
Under certain operating conditions (start, shutdown, specific operating points) the barometric pressure sensor, exhaust-gas backpressure sensor and boost-pressure sensor are cross-checked for mutual plausibility. The DTC is logged when the boost pressure differs from the other two pressures by more than 130 mbar and their difference is less than 150 mbar.
Test condition
Voltage condition
Under certain operating conditions (start, shutdown, specific operating points) the barometric pressure sensor, exhaust-gas backpressure sensor and boost-pressure sensor are cross-checked for mutual plausibility. The DTC is logged when the boost pressure differs from the other two pressures by more than -130 mbar and their difference is less than 150 mbar.
Test condition
Voltage condition
To monitor the particulate filter the measured differential pressure is compared with a threshold. If the differential pressure is below this threshold then a removed filter or substantial damage is detected. The monitoring limit is stored in the program map where it is defined based on the volumetric flow rate and the continuously simulated soot mass in the particulate filter. The monitoring function thus makes it possible to detect damage when the filter is empty and to assess operational plausibility by monitoring the progressive increase in the pressure differential that accompanies higher loads and greater accumulations of carbon deposits.
Test condition
The error check is run on a continuous basis in a 100 ms grid whenever the following conditions are satisfied
- Active regeneration in progress.
- The volumetric flow rate is above 700 m^3/h.
Voltage condition
The error check is run on a continuous basis in a 100 ms grid whenever the following conditions are satisfied
- Active regeneration in progress.
- The volumetric flow rate is above 700 m^3/h.
The diagnostic trouble code is logged when the stored maximum value for differential pressure after correction with the current differential pressure offset is less than a threshold based on operating point.
The threshold is calculated based on a characteristic curve using the volumetric flow rate of the exhaust gas and is equal to roughly 4 hPa.
Test condition
The following conditions must be met for the error check
- The maximum volumetric flow rate in the current driving cycle must lie above the threshold 350 m^3/h.
- The current differential pressure offset must be completely calculated in the shutdown phase.
- The diagnostic trouble code 25C800 and 4D03 must be completely tested and should not be active.
Voltage condition
The following conditions must be met for the error check
- The maximum volumetric flow rate in the current driving cycle must lie above the threshold 350 m^3/h.
- The current differential pressure offset must be completely calculated in the shutdown phase.
- The diagnostic trouble code 25C800 and 4D03 must be completely tested and should not be active.
Monitoring of particulate filter efficiency. When the value for measured soot mass is lower than the limit value 0 g the diagnostic trouble code is logged.
Test condition
The error check runs when the simulated soot mass rises above the limit value 0 g.
Voltage condition
The error check runs when the simulated soot mass rises above the limit value 0 g.
The diagnostic trouble code is logged when the DDE recognizes that particulate filter regeneration to protect the engine has been activated too often.
Test condition
When the engine is running the error check runs in a 100 ms grid on a continuous basis.
Voltage condition
When the engine is running the error check runs in a 100 ms grid on a continuous basis.
Particulate filter overload detection. The monitoring function detects the error as follows
- The error is detected when the differential pressure rises above a specific threshold. The threshold is calculated from a program map and uses the parameters RPM and injection quantity.
- The error is recognized when the flow resistance rises above a threshold. The threshold is calculated from a program map and uses the parameters RPM and injection quantity.
Note. Because excessive soot accumulation within the particulate filter can lead to overheating during thermal regeneration, when this fault occurs the regeneration process is deactivated once the soot mass reaches a certain level.
Test condition
Continuous, for enable conditions see defect and self-healing description
Voltage condition
Continuous, for enable conditions see defect and self-healing description
Plausibilities of exhaut-gas pressure sensor with boost-pressure sensor and ambient pressure sensor.
If the difference between the exhaust-gas pressure and the average of ambient pressure and pressure on the downstream side of the intercooler lies above the limit value and if these reference pressures are approximately equal, then - provided that the operating point is valid - the exhaust-gas pressure sensor is registered as defective and the diagnostic trouble code is logged.
Test condition
Terminal 15 on and engine stationary for at least 400 ms.
Voltage condition
Terminal 15 on and engine stationary for at least 400 ms.
Plausibilities of exhaut-gas pressure sensor with boost-pressure sensor and ambient pressure sensor.
If the difference between the exhaust-gas pressure and the average of ambient pressure and pressure on the downstream side of the intercooler lies below the limit value and if these reference pressures are approximately equal, then - provided that the operating point is valid - the exhaust-gas pressure sensor is registered as defective and the diagnostic trouble code is logged.
Test condition
Terminal 15 on and engine stationary for at least 400 ms.
Voltage condition
Terminal 15 on and engine stationary for at least 400 ms.
Monitoring for incomplete regeneration. The diagnostic trouble code is logged when the measured soot mass rises above a limit value. The limit value is calculated based on the simulated soot mass and a characteristic curve.
Test condition
The test routine runs when the following conditions are satisfied
- Volumetric flow rate of exhaust gas is greater than 120 m^3/h.
- Particulate filter temperature is less than 450 °C.
- The particulate filter load accumulation is determined based on measurement of differential pressure and not on simulation.
- Regeneration has been successfully concluded and the limit value has not yet been reached.
The error check runs with event debounce.
Voltage condition
The test routine runs when the following conditions are satisfied
- Volumetric flow rate of exhaust gas is greater than 120 m^3/h.
- Particulate filter temperature is less than 450 °C.
- The particulate filter load accumulation is determined based on measurement of differential pressure and not on simulation.
- Regeneration has been successfully concluded and the limit value has not yet been reached.
The error check runs with event debounce.
Physical monitoring of boost-pressure sensor. The diagnostic trouble code is logged when the physical sensor signal for boost pressure rises above the limit value 3300 mbar.
Test condition
The monitoring routine is executed only provided that no electrical errors have been logged.
Voltage condition
The monitoring routine is executed only provided that no electrical errors have been logged.
Physical monitoring of boost-pressure sensor. The diagnostic trouble code is logged when the physical sensor signal for the boost-pressure sensor falls below the limit value 200 mbar.
Test condition
The monitoring routine is executed only provided that no electrical errors have been logged.
Voltage condition
The monitoring routine is executed only provided that no electrical errors have been logged.
Boost-pressure sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) exceeds the specified upper limit 4950 mV.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is present. The check frequency depends on the process sequence control.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is present. The check frequency depends on the process sequence control.
Boost-pressure sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than the specified lower limit 70 mV.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is present. The check frequency depends on the process sequence control.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is present. The check frequency depends on the process sequence control.
If the physical sensor signal for pre-turbocharger exhaust-gas pressure exceeds the limit value 4900 mbar the diagnostic trouble code is logged.
Test condition
The monitoring routine is executed only provided that no electrical errors have been logged.
Voltage condition
The monitoring routine is executed only provided that no electrical errors have been logged.
The diagnostic trouble code is logged when the physical sensor signal for pre-turbocharger exhaust-gas pressure falls below the limit value 610 mbar.
Test condition
The monitoring routine is executed only provided that no electrical errors have been logged.
Voltage condition
The monitoring routine is executed only provided that no electrical errors have been logged.
Monitoring for positive control deviation (rail pressure too low) while rail pressure is being regulated by fuel-quantity control valve.
The error is recognized when the positive control deviation is greater than the limit defined by the operating point.
The limit is calculated based on engine RPM and lies between 170 bar and 200 bar.
Test condition
The test routine runs only when the following conditions are satisfied
- Rail-pressure control from fuel-quantity control valve is active.
- Monitoring is enabled.
Voltage condition
The test routine runs only when the following conditions are satisfied
- Rail-pressure control from fuel-quantity control valve is active.
- Monitoring is enabled.
Monitoring for negative control deviation (rail pressure too high) when fuel-quantity control valve regulates rail pressure at delivery rate of zero.
The diagnostic trouble code is logged when the negative control deviation is less than the limit defined by the operating point and the volumetric flow rate defined for the fuel-quantity control valve is less than or equal to the limit -1650 mm^3/s.
The limit defined by operating point is calculated based on engine RPM and lies at roughly -300 bar.
Test condition
The test routine runs only when the following conditions are satisfied
- Rail-pressure control from fuel-quantity control valve is active.
- The injection quantity must exceed 4 mg/hub.
- The fuel temperature must be greater than -40 °C.
Voltage condition
The test routine runs only when the following conditions are satisfied
- Rail-pressure control from fuel-quantity control valve is active.
- The injection quantity must exceed 4 mg/hub.
- The fuel temperature must be greater than -40 °C.
Monitoring minimum rail pressure with fuel-quantity control valve regulating fuel rail pressure.
The DTC is logged when the monitored rail pressure is less than the limit value calibrated against flow quantity of zero.
The limit is calculated based on engine RPM and lies between 120 bar and 140 bar.
Test condition
The test routine runs only when the following conditions are satisfied
- Rail-pressure control from fuel-quantity control valve is active.
- Monitoring is enabled.
Voltage condition
The test routine runs only when the following conditions are satisfied
- Rail-pressure control from fuel-quantity control valve is active.
- Monitoring is enabled.
Monitoring maximum rail pressure with fuel-quantity control valve regulating fuel rail pressure. The diagnostic trouble code is logged when the monitored rail pressure is higher than the limit 1750 bar.
Test condition
The test routine runs only when the following conditions are satisfied
- Rail-pressure control from fuel-quantity control valve is active.
- Monitoring is enabled.
Voltage condition
The test routine runs only when the following conditions are satisfied
- Rail-pressure control from fuel-quantity control valve is active.
- Monitoring is enabled.
Monitoring for positive control deviation (rail pressure too low) while rail pressure is being regulated by rail-pressure control valve. The diagnostic trouble code is logged when the positive control deviation is greater than the limit defined by the operating point.
The limit is calculated based on engine RPM and lies between 170 bar and 250 bar.
Test condition
The test routine runs only when the following conditions are satisfied
- Rail pressure control with rail-pressure control valve, or rail pressure control with rail-pressure control valve and fuel-quantity control valve.
- Monitoring is enabled.
Voltage condition
The test routine runs only when the following conditions are satisfied
- Rail pressure control with rail-pressure control valve, or rail pressure control with rail-pressure control valve and fuel-quantity control valve.
- Monitoring is enabled.
Monitoring for negative control deviation (rail pressure too high) and excessively low rail-pressure control-valve control variable with rail pressure control from rail-pressure control valve.
The diagnostic trouble code is logged when the negative control deviation falls below the limit -250 bar and when the control variable is less than or equal to the limit 20 bar.
Test condition
The test routine runs only when the following conditions are satisfied
- Rail pressure control with rail-pressure control valve, or rail pressure control with rail-pressure control valve and fuel-quantity control valve.
- Monitoring is enabled.
Voltage condition
The test routine runs only when the following conditions are satisfied
- Rail pressure control with rail-pressure control valve, or rail pressure control with rail-pressure control valve and fuel-quantity control valve.
- Monitoring is enabled.
Monitoring minimum rail pressure with rail-pressure control valve regulating fuel rail pressure. The DTC is logged when the monitored rail pressure is less than the limit value calibrated against flow quantity of zero.
The limit is calculated based on engine RPM and is 120 bar.
Test condition
The test routine runs only when the following conditions are satisfied
- Rail pressure control with rail-pressure control valve, or rail pressure control with rail-pressure control valve and fuel-quantity control valve.
- Monitoring is enabled.
Voltage condition
The test routine runs only when the following conditions are satisfied
- Rail pressure control with rail-pressure control valve, or rail pressure control with rail-pressure control valve and fuel-quantity control valve.
- Monitoring is enabled.
Monitoring maximum rail pressure with rail-pressure control valve regulating fuel rail pressure. The diagnostic trouble code is logged when the monitored rail pressure is higher than the limit 1750 bar.
Test condition
The test routine runs only when the following conditions are satisfied
- Rail pressure control with rail-pressure control valve, or rail pressure control with rail-pressure control valve and fuel-quantity control valve.
- Monitoring is enabled.
Voltage condition
The test routine runs only when the following conditions are satisfied
- Rail pressure control with rail-pressure control valve, or rail pressure control with rail-pressure control valve and fuel-quantity control valve.
- Monitoring is enabled.
Rail-pressure sensor offset test monitoring function. If the raw value for rail pressure (voltage) remains, for the period of 30 ms during engine start, above the threshold 648 mV or for the period 100 ms at shutdown it remains above the threshold 648 mV the offset in the positive direction is too large and the DTC is logged.
Test condition
The test routine is executed according to the programmed time grid.
The error check is performed when the following conditions are active
- No electrical diagnostic trouble codes logged.
- Engine is in post-operational shutdown phase.
Voltage condition
The test routine is executed according to the programmed time grid.
The error check is performed when the following conditions are active
- No electrical diagnostic trouble codes logged.
- Engine is in post-operational shutdown phase.
Rail-pressure sensor offset test monitoring function. If the raw value for rail pressure remains, for the period of 30 ms during engine start, below the threshold 391 mV, or for the period 100 ms at shutdown it remains below the threshold 391 mV the offset in the negative direction is too large and the DTC is logged.
Test condition
The test routine is executed according to the programmed time grid.
The error check is performed when the following conditions are active
- No electrical diagnostic trouble codes logged.
- Engine is in post-operational shutdown phase.
Voltage condition
The test routine is executed according to the programmed time grid.
The error check is performed when the following conditions are active
- No electrical diagnostic trouble codes logged.
- Engine is in post-operational shutdown phase.
Rail pressure sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) exceeds the specified upper limit 4749 mV. The error is also recognized when the uncorrected raw sensor voltage is greater than the limit value 4900 mV.
Test condition
The monitoring functions are only performed when no sensor power-supply fault diagnostic trouble code has been logged.
The test routine is executed continuously in a 10 ms grid.
Voltage condition
The monitoring functions are only performed when no sensor power-supply fault diagnostic trouble code has been logged.
The test routine is executed continuously in a 10 ms grid.
Rail-pressure sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than 256 mV.
Test condition
The monitoring functions are only performed when no sensor power-supply fault diagnostic trouble code has been logged.
The test routine is executed continuously in a 10 ms grid.
Voltage condition
The monitoring functions are only performed when no sensor power-supply fault diagnostic trouble code has been logged.
The test routine is executed continuously in a 10 ms grid.
Monitoring of SCR system reduction agent quality. The diagnostic trouble code is logged when an invalid quality for the reduction agent is recognized following refilling.
none
Monitoring long-term adaptation factor. The diagnostic trouble code is logged when the long-term adaptation factor rises above the maximum limit 1.
Test condition
The error check runs only with a rising flank for long-term adaptation factor and when no other faults are present.
The check runs continuously in a 100 ms grid.
Voltage condition
The error check runs only with a rising flank for long-term adaptation factor and when no other faults are present.
The check runs continuously in a 100 ms grid.
Monitoring long-term adaptation factor. The diagnostic trouble code is logged when the long-term adaptation factor falls below the minimum limit value 1.
Test condition
The error check runs only with a rising flank for long-term adaptation factor and when no other faults are present.
The check runs continuously in a 100 ms grid.
Voltage condition
The error check runs only with a rising flank for long-term adaptation factor and when no other faults are present.
The check runs continuously in a 100 ms grid.
Monitoring of NOx efficiency level. The diagnostic trouble code is logged when the average NOx conversion efficiency of the SCR system falls below the minimum NOx efficiency level threshold (varies according to operating point).
The efficiency level is calculated based on the mass flow rates of NOx upstream and downstream from the SCR converter and the correction factor SCRChk_facEta1Cor_C.
The efficiency level threshold is calculated based on the mass flow rate of the NOx upstream and downstream from the SCR converter and a threshold value.
Test condition
The test routine runs when the following conditions are satisfied
- The efficiency level threshold is greater than 0.
- A new valid NOx efficiency level has been calculated (operating point and monitored value are plausible and valid).
The error check runs continuously during the calculation of efficiency level, provided that it supplies a valid, plausible value, in a grid with a 100 ms periodicity.
Voltage condition
The test routine runs when the following conditions are satisfied
- The efficiency level threshold is greater than 0.
- A new valid NOx efficiency level has been calculated (operating point and monitored value are plausible and valid).
The error check runs continuously during the calculation of efficiency level, provided that it supplies a valid, plausible value, in a grid with a 100 ms periodicity.
none
none
Monitoring of NOx efficiency level (entire efficiency range). The monitoring function links SCR efficiency level monitoring in efficiency range 1 and efficiency range 2.
The diagnostic trouble code is logged when an error is detected during monitoring of one of the two ranges.
Test condition
The monitoring function is active when the conditions for SCR efficiency monitoring in efficiency range 1 and efficiency range 2 (according to temperature range) are satisfied.
Voltage condition
The monitoring function is active when the conditions for SCR efficiency monitoring in efficiency range 1 and efficiency range 2 (according to temperature range) are satisfied.
Plausibility check on NOx sensor behind SCR converter. The system waits for NOx peaks of an adequate intensity before the SCR converter for plausibility check on the NOx sensor behind the SCR converter.
If the sensor's shift in NOx concentration fails to reach the limit value for the operating point the diagnostic trouble code is logged.
Test condition
Voltage condition
none
none
If compliance with the monitoring conditions is present = TRUE while the metering is simultaneously still not enabled = FALSE an error is recognized.
Test condition
Test conditions
The monitoring function runs continuously when compliance with the test conditions is present.
Voltage condition
Test conditions
The monitoring function runs continuously when compliance with the test conditions is present.
Monitoring reduction agent metering. If the specified pressure for the delivery module rises above the maximum pressure threshold 6500 mbar for at least 1 s the diagnostic trouble code is logged.
Test condition
The error check runs only when the metering function is active.
Voltage condition
The error check runs only when the metering function is active.
Monitoring reduction agent metering. The diagnostic trouble code is logged when the specified pressure for the metering module falls below the minimum pressure threshold 3100 mbar for at least 30 s
or if the pressure, for a period of at least 15 s, is below the second minimum pressure threshold 2900 mbar.
none
Monitoring reduction agent metering. If the reduction agent metering pressure rises above the limit value 7950 mbar the error is recognized once the pre-debounce time 1 s expires.
Test condition
Monitoring is executed during initialization of the DDE (before pressurization in metering module.
Voltage condition
Monitoring is executed during initialization of the DDE (before pressurization in metering module.
SCR monitoring: Reduction agent pressurization. A timer is incrementalized if the metering system fails to reach the limit value 3500 mbar within the period 11000 ms. When the number of failed pressurization attempts exceeds the limit value 3 the diagnostic trouble code is logged.
Test condition
The error check only runs when the SCR monitoring system's status coordinator is at pressurization status.
Voltage condition
The error check only runs when the SCR monitoring system's status coordinator is at pressurization status.
SCR monitoring: Metering depressurization. If it is not possible to reduce the pressure in the metering system, within the period 3000 ms, below the limit value 500 mbar, then the diagnostic trouble code is logged.
Test condition
The error check only runs when the SCR monitoring system's status coordinator is at depressurization status.
Voltage condition
The error check only runs when the SCR monitoring system's status coordinator is at depressurization status.
Metering module plausibility check. Once compliance with the test conditions is present the current pressure of the reduction agent is saved.
When the test is enabled the pressure differential between the saved pressure value and the current monitored value is calculated and monitored for compliance with the limit value 1000 mbar.
If the limit value is exceeded this indicates a sticking metering module and a diagnostic trouble code is logged.
Test condition
The monitoring data are recalculated (positive flanks) when the state machine has a value of COSCR_VENTILLATION and the pressure of the metering pump is above the limit value 3000 mbar.
Voltage condition
The monitoring data are recalculated (positive flanks) when the state machine has a value of COSCR_VENTILLATION and the pressure of the metering pump is above the limit value 3000 mbar.
Plausibility check on 4/2 directional-control valve (switch valve) in delivery module. Once compliance with the test conditions is present the current pressure of the reduction agent is saved. When the state machine enables the test the pressure differential between the saved pressure value and the current monitored value is calculated and monitored for the limit value 1000 mbar. If the limit value is exceeded this indicates a sticking reversing valve and a diagnostic trouble code is logged.
Test condition
The error check proceeds when the state machine has the value COSCR_PRESSUREREREDUCTION and the pressure of the delivery module is above the limit value 3000 mbar.
Voltage condition
The error check proceeds when the state machine has the value COSCR_PRESSUREREREDUCTION and the pressure of the delivery module is above the limit value 3000 mbar.
Plausibility check on active tank heater. When the heating system is activated the current temperature in the tank is saved and a timer starts.
The DTC is logged when it proves impossible to heat the tank to the limit value defined relative to the active tank's temperature within the time defined relative to temperature.
The limit value is calculated based on the active tank temperature and a characteristic curve and lies between roughly 5 °C at an active tank temperature of -40 °C and 0 °C at an active tank temperature of 0 °C.
Test condition
The error check runs continuously while the active tank heater is activated.
Voltage condition
The error check runs continuously while the active tank heater is activated.
Exhaust-gas differential-pressure sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) exceeds the specified upper limit 4750 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present. The test frequency varies according to the process sequence control.
Voltage condition
The test routine is executed only provided that no other electrical faults are present. The test frequency varies according to the process sequence control.
The diagnostic trouble code is logged when the raw voltage signal from the pre-turbocharger exhaust-gas pressure sensor exceeds the limit value 2800 mV.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged. The error check proceeds continuously according to the programmed process grid.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged. The error check proceeds continuously according to the programmed process grid.
Monitoring of exhaust-gas temperature sensor before particulate filter. The diagnostic trouble code is logged when the raw sensor signal (voltage) exceeds the specified upper limit 3280 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present.
Voltage condition
The test routine is executed only provided that no other electrical faults are present.
The diagnostic trouble code is logged when the raw voltage signal of the exhaust-gas temperature sensor before the SCR converter rises above the limit value 3285 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process grid.
Voltage condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process grid.
The diagnostic trouble code is logged when the raw voltage signal from the reduction agent pressure sensor rises above the limit value 4900 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present.
Voltage condition
The test routine is executed only provided that no other electrical faults are present.
Exhaust-gas differential-pressure sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than the specified lower limit 152 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process grid.
Voltage condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process grid.
Pre-turbocharger exhaust-gas pressure sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than the specified lower limit 100 mV.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Monitoring of exhaust-gas temperature sensor before particulate filter. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than the specified lower limit 49 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process grid.
Voltage condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process grid.
Monitoring of exhaust-gas temperature sensor before the SCR converter. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than the specified lower limit 50 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present.
Voltage condition
The test routine is executed only provided that no other electrical faults are present.
Pressure sensor monitoring function. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than the specified lower limit 350 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present.
Voltage condition
The test routine is executed only provided that no other electrical faults are present.
The sensor power-supply voltage is monitored by the DDE hardware. If the power-supply voltage for sensor group 1 is outside the limits the diagnostic trouble code is logged.
The limits are defined by the hardware.
Sensor group 1 includes the following sensors
- Accelerator pedal module sensor 1
- Rail-pressure sensor
- Boost-pressure sensor
Exhaust-gas backpressure sensor
- Fuel pressure-temperature sensor
- Brake pressure sensor
- Throttle valve sensor
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The sensor power-supply voltage is monitored by the DDE hardware. If the power-supply voltage for sensor group 2 is outside the limits the diagnostic trouble code is logged.
The limits are defined by the hardware.
Sensor group 2 includes the following sensors
- accelerator pedal module sensor 2
- particulate filter's exhaust-gas differential pressure sensor
- brake vacuum sensor
- EGR valve position sensor
- Exhaust-gas pressure sensor before turbocharger
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The sensor power-supply voltage is monitored by the DDE hardware. If the power-supply voltage for sensor group 3 is outside the limits the diagnostic trouble code is logged.
The limits are defined by the hardware.
Sensor group 3 includes the following sensors
- Crankshaft sensor
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
none
none
The diagnostic trouble code is logged when the intake-air temperature sensor signal rises above the limit value 130 °C.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
The diagnostic trouble code is logged when the sensor signal for boost-air temperature rises above the limit value 110 °C.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Charge-air temperature sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) exceeds the specified upper limit 3260 mV.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Charge-air temperature sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than the specified lower limit 200 mV.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Boost-air temperature plausibility check. The DTC is logged when the temperature difference between the boost-air temperature and a calculated reference temperature rises above a limit defined based upon operating conditions.
The limit value is calculated using the engine's downtime and a characteristic curve.
Test condition
The error check runs once per driving cycle provided that compliance with the following conditions is present
- The engine downtime (time between engine shutdown and next Terminal 15 on) is greater than or equal to 19800 s.
- No electrical error is logged.
- The reference temperature is above the threshold -40 °C.
Voltage condition
The error check runs once per driving cycle provided that compliance with the following conditions is present
- The engine downtime (time between engine shutdown and next Terminal 15 on) is greater than or equal to 19800 s.
- No electrical error is logged.
- The reference temperature is above the threshold -40 °C.
The diagnostic trouble code is logged when the sensor signal for exhaust-gas temperature behind the EGR cooler rises above the limit value 500 °C.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Exhaust-gas temperature behind EGR cooler sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) is greater than the maximum approved limit value 3280 mV.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Exhaust-gas temperature behind EGR cooler sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) is less than the maximum approved limit value 80 mV.
Test condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
Voltage condition
The monitoring function is only implemented when no sensor power-supply problem is logged.
The diagnostic trouble code is logged when the sensor signal for exhaust-gas temperature behind the low-pressure EGR cooler rises above the limit value 400 °C.
Test condition
The monitoring function is only implemented when no electrical error is logged.
Voltage condition
The monitoring function is only implemented when no electrical error is logged.
Monitoring of voltage range on exhaust-gas temperature sensor behind low-pressure EGR cooler. The diagnostic trouble code is logged when the raw sensor signal (voltage) rises above the maximum specified limit value 3280 mV.
Test condition
The monitoring function is only implemented when no electrical error is logged.
Voltage condition
The monitoring function is only implemented when no electrical error is logged.
Monitoring of voltage range on exhaust-gas temperature sensor behind low-pressure EGR cooler. The diagnostic trouble code is logged when the raw sensor signal (voltage) falls below the minimum approved limit value 80 mV.
Test condition
The monitoring function is only implemented when no electrical error is logged.
Voltage condition
The monitoring function is only implemented when no electrical error is logged.
When the physical sensor signal for the pre-catalyst exhaust-gas temperature rises above the limit value 790 °C the diagnostic trouble code is logged.
Test condition
The error check proceeds continuously in the programmed process grid.
Voltage condition
The error check proceeds continuously in the programmed process grid.
Pre-oxidation catalyst temperature sensor monitoring function. When the raw sensor signal (voltage) is greater than the maximum limit value, the diagnostic trouble code is logged.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
Pre-oxidation catalyst temperature sensor monitoring function. When the raw sensor signal (voltage) is less than the minimum the diagnostic trouble code is logged.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
When the physical sensor signal for exhaust-gas temperature before the particulate filter exceeds the limit value 790 °C the diagnostic trouble code is logged.
Test condition
The monitoring function is only implemented when no electrical error is logged.
Voltage condition
The monitoring function is only implemented when no electrical error is logged.
none
none
none
none
The DDE recognizes an open-circuit error at the output stage
Throttle-valve actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes an over-temperature fault in the output stage
Throttle-valve actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short circuit to positive in the output stage
Throttle-valve actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short circuit to ground error in the output stage
Throttle-valve actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes an open circuit error in the output stage for the wastegate valve vacuum converter.
none
The DDE recognizes an over-temperature error in the output stage for the wastegate valve.
Test condition
The error check runs in the programmed process grid.
Voltage condition
The error check runs in the programmed process grid.
The DDE recognizes a short circuit to positive in the output stage for the wastegate valve vacuum converter.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short circuit to ground in the output stage for the wastegate valve vacuum converter.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes an open-circuit error in the output stage
With single-stage boost: Boost-pressure actuator.
With multi-stage boost: Turbine control flap pressure converter.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes an over-temperature fault in the output stage
With single-stage boost: Boost-pressure actuator.
With multi-stage boost: Turbine control flap pressure converter.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short circuit to positive in the output stage
With single-stage boost: Boost-pressure actuator.
With multi-stage boost: Turbine control flap pressure converter.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short to ground at the output stage
With single-stage boost: Boost-pressure actuator.
With multi-stage boost: Turbine control flap pressure converter.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
When the physical sensor signal for exhaust-gas temperature before the SCR converter rises above the limit value 750 °C the diagnostic trouble code is logged.
Test condition
The monitoring function is only implemented when no electrical error is logged.
Voltage condition
The monitoring function is only implemented when no electrical error is logged.
The DDE recognizes an open-circuit error at the output stage
Metering module.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes an over-temperature fault in the output stage
Metering module.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short circuit to positive in the output stage
SCR metering module.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes a short circuit to positive error in the output stage
Metering module.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes short circuit to ground error in the output stage
SCR metering module.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes short circuit to ground error in the output stage
Metering module.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
Starting with 03/2010 the heating units for the delivery module and the heating systems are activated consecutively with a 500 ms delay. This results in two spikes in the lead value. The error is recognized when the second spike in the lead value is below the limit 0 1/Ohm.
Test condition
This error is checked once in each heating cycle when a lead value stroke has been detected or 2 seconds have elapsed since initial heater activation.
Voltage condition
This error is checked once in each heating cycle when a lead value stroke has been detected or 2 seconds have elapsed since initial heater activation.
The error is recognized when the resistance following activation of the metering line's heating unit rises above a specific limit value.
Test condition
A check for this error runs once per heating cycle.
Voltage condition
A check for this error runs once per heating cycle.
The error is recognized when no lead value stroke has been recognized after a specific period of time, meaning that the lead value remains below the threshold 0 1/Ohm.
Test condition
A check for this error runs once per heating cycle.
Voltage condition
A check for this error runs once per heating cycle.
Starting with 03/2010 the heating units for the delivery module and the metering line are activated consecutively with a 500 ms delay. This results in two peaks in the lead value. The error is recognized when the first spike in the lead value is above the limit 0 1/Ohm.
Test condition
A check for this error runs once per heating cycle.
Voltage condition
A check for this error runs once per heating cycle.
Monitoring of reduction agent pressure line heating. The diagnostic trouble code is logged when the measured current draw from the deactivated heater exceeds the limit value 150 uA.
Test condition
The error check runs continuously when the tank heater is deactivated.
Voltage condition
The error check runs continuously when the tank heater is deactivated.
Monitoring reduction agent metering line heater. An open circuit error is recognized when the heating system's monitored current draw is below the limit value by an increment defined according to operating point.
Test condition
The test routine runs when the following conditions are satisfied
- The active tank heating system is activated.
- No battery fault is detected.
Voltage condition
The test routine runs when the following conditions are satisfied
- The active tank heating system is activated.
- No battery fault is detected.
Monitoring peak power in reduction agent metering line heater. An open circuit error is recognized when the peak heater power lies below a limit value defined based on operating point and the peak power test has been completed.
The peak power test is terminated when one of the following conditions is met
- An activation signal has been transmitted to the heater for at least 10000 ms.
- When the peak power test has been recognized as terminated based on the shift in the heater's power.
Test condition
The error check runs once the peak power test has been completed.
Voltage condition
The error check runs once the peak power test has been completed.
Monitoring peak power in reduction agent pressure line heater. A short circuit is recognized when the peak heater output is above a limit value defined based on operating point and the peak power test has been completed.
The peak power test is terminated when one of the following conditions is met
- An activation signal has been transmitted to the heater for at least 10000 ms.
- When the peak power test has been recognized as terminated based on the shift in the heater's power.
Test condition
The error check runs once the peak power test has been completed.
Voltage condition
The error check runs once the peak power test has been completed.
Active tank heater monitoring. When the heater is deactivated the measured current draw of the active tank heater should not be above the limit value 100 uA. If the measured current draw is not above the limit value, this indicates a short circuit and a diagnostic trouble code is logged.
Test condition
The error check runs continuously when the active tank heater is deactivated.
Voltage condition
The error check runs continuously when the active tank heater is deactivated.
Active tank heater monitoring. An open circuit error is logged when the heater's measured current draw is below the limit value.
Test condition
The test routine runs when the following conditions are satisfied
- The active tank heating system is activated.
- No battery fault is detected.
Voltage condition
The test routine runs when the following conditions are satisfied
- The active tank heating system is activated.
- No battery fault is detected.
Active tank heater power peak monitoring. A short circuit is recognized when the peak heater power is above a limit value defined based on operating point, and after the peak power test has been completed.
The peak power test is terminated when one of the following conditions is met
- An activation signal has been transmitted to the heater for at least 10000 ms.
- When the peak power test has been recognized as terminated based on the output shift of the heater.
Test condition
The error check runs once the peak power test has been completed.
Voltage condition
The error check runs once the peak power test has been completed.
The DDE recognizes an open-circuit error at the output stage
Metering line/delivery module heater.
Test condition
The test routine is executed continuously.
Voltage condition
The test routine is executed continuously.
The DDE recognizes short circuit to B+ error in the output stage
Reduction agent pressure line heating
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes short circuit to ground error in the output stage
Reduction agent pressure line heating
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
Metering wire/delivery module heater monitoring. When the voltage signal rises above the maximum limit 3200 mV the diagnostic trouble code is logged.
Test condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process running time.
Voltage condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process running time.
The DDE recognizes an open-circuit error at the output stage
Active tank heating system.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes a short circuit to positive error in the output stage
Active tank heating system.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes short circuit to ground error in the output stage
Active tank heating system.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
Active tank heater monitoring. When the voltage signal rises above the maximum limit 3200 mV the diagnostic trouble code is logged.
Test condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process running time.
Voltage condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously according to the defined process running time.
Plausibility check on passive tank level sensor. When the physical sensor signal falls below the limit value 35 % the signal is classified as implausible and the diagnostic trouble code is logged.
Test condition
The test routine is executed continuously.
Voltage condition
The test routine is executed continuously.
Monitoring of both passive tank level sensors. The DTC is logged when the physical sensor signal is between 35 % and 45 %.
Test condition
The test routine is executed continuously.
Voltage condition
The test routine is executed continuously.
Plausibility check on passive tank reduction agent level.
The level sensor's evaluation circuit transmits the information "all sensors wet" immediately followed by "all sensors dry" within the period 70 s. The diagnostic trouble code is logged when the status change is not completed within this period.
The diagnostic trouble code is also logged when the raw level value does not lie between SCR_rUPasTnkLvlMin_C and SCR_rUPasTnkLvlMax_C.
Test condition
The test routine is executed continuously.
Voltage condition
The test routine is executed continuously.
The DDE recognizes an open-circuit error at the output stage
Delivery pump.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes a short circuit to positive error in the output stage
Delivery pump.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes short circuit to ground error in the output stage
Delivery pump.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The diagnostic trouble code is logged when the physical sensor signal for reduction agent pressure rises above the limit value 7800 mbar.
Test condition
The monitoring function is only implemented when no electrical error is logged.
Voltage condition
The monitoring function is only implemented when no electrical error is logged.
Reduction agent pressure sensor plausibility check. The plausibility of the pressure sensor's transmissions is assessed using a pressure value calculated relative to the ambient temperature. The diagnostic trouble code is logged when the difference between measured reduction agent pressure and the reference pressure exceeds the limit value 450 mbar.
Test condition
Execution of the error check is contingent upon compliance with the following conditions
- The signal qualities of the reference pressure sensors are OK.
- The fuel tank system has already been drained (level <= 0 %).
Voltage condition
Execution of the error check is contingent upon compliance with the following conditions
- The signal qualities of the reference pressure sensors are OK.
- The fuel tank system has already been drained (level <= 0 %).
The DDE recognizes a load drop error in the output stage
Reduction agent switch valve
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes a short circuit to the high side in the output stage
Reduction agent switch valve (fuel delivery from passive to active fuel tank)
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes a short circuit to ground in the output stage
Reduction agent switch valve (fuel delivery from passive to active fuel tank)
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
Plausibility check on active tank level sensor. When the physical sensor signal falls below the limit value 35 % the signal is classified as implausible and the diagnostic trouble code is logged.
none
Monitoring of active tank level sensor. The diagnostic trouble code is logged when the physical sensor signal is between 35 % and 45 %.
none
Plausibility check on active tank reduction agent level.
The level sensor's processing circuit transmits the information "all sensors wet" immediately followed by "all sensors dry" within the period 70 s. The diagnostic trouble code is logged when the status change is not completed within this period.
The diagnostic trouble code is also logged when the raw level value does not lie between SCR_rUTnkLvlMin_C and SCR_rUTnkLvlMax_C.
none
Active tank temperature sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) rises above the limit 3200 mV.
The diagnostic trouble code is also logged when the temperature sensor's resistance rises above roughly 350 kOhms.
Test condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously in the programmed process grid.
Voltage condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously in the programmed process grid.
Active tank temperature sensor monitoring. The diagnostic trouble code is logged when the raw sensor signal (voltage) falls below the minimum limit 165 mV.
Test condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously in the programmed process grid.
Voltage condition
The test routine is executed only provided that no other electrical faults are present. The error check proceeds continuously in the programmed process grid.
A plausibility error at the reduction agent temperature sensor is recognized when
Error 1: The tank temperature rises above the limit value -5 °C and the measured active tank level is less than 9 %.
Or
Error 2: The tank temperature falls below the limit value -20 °C and the measured active tank level is greater than 9 %.
Test condition
For testing of the individual errors the following conditions must be satisfied
- The calculated tank level is greater than 45 %. No other faults have been detected.
- The outside temperature, the catalyst temperature and the coolant temperature do not display mutual deviations in excess of +/- 40 °C.
Voltage condition
For testing of the individual errors the following conditions must be satisfied
- The calculated tank level is greater than 45 %. No other faults have been detected.
- The outside temperature, the catalyst temperature and the coolant temperature do not display mutual deviations in excess of +/- 40 °C.
Plausibility check on active tank reduction agent temperature sensor. The DTC is logged when the difference between the measured reduction agent temperature and the outside temperature rises above the limit value 40 °C.
Test condition
Execution of the error check is contingent upon compliance with the following conditions
The outside temperature, the catalyst temperature and the coolant temperature do not display mutual deviations in excess of +/- 40 °C.
Voltage condition
Execution of the error check is contingent upon compliance with the following conditions
The outside temperature, the catalyst temperature and the coolant temperature do not display mutual deviations in excess of +/- 40 °C.
Plausibility check on active tank reduction agent temperature sensor. The DTC is logged when the difference between the measured reduction agent temperature and the outside temperature falls below the limit value -40 °C.
Test condition
Execution of the error check is contingent upon compliance with the following conditions
The outside temperature, the catalyst temperature and the coolant temperature do not display mutual deviations in excess of +/- 40 °C.
Voltage condition
Execution of the error check is contingent upon compliance with the following conditions
The outside temperature, the catalyst temperature and the coolant temperature do not display mutual deviations in excess of +/- 40 °C.
Swirl-valve actuator monitoring function.
The actuator reports an error to the DDE via the PWM control-activation wire.
The DDE recognizes the error when the actuator grounds the PWM control-activation signal between 400 ms and 600 ms.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
Swirl-valve actuator monitoring function.
The actuator reports an error to the DDE via the PWM control-activation wire.
The DDE recognizes the error when the actuator grounds the PWM control-activation signal between 850 ms and 1250 ms.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
Swirl-valve actuator monitoring function.
The actuator reports an error to the DDE via the PWM control-activation wire.
The DDE recognizes the error when the actuator grounds the PWM control-activation signal between 1350 ms and 1650 ms.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
Swirl-valve actuator monitoring function.
The actuator reports an error to the DDE via the PWM control-activation wire.
The DDE recognizes the error when the actuator grounds the PWM control-activation signal between 1850 ms and 2150 ms.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes an open-circuit error at the output stage
Swirl-valve actuator.
Test condition
The error check proceeds continuously according to the programmed process grid.
Voltage condition
The error check proceeds continuously according to the programmed process grid.
The DDE recognizes an over-temperature fault in the output stage
Swirl-valve actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes a short circuit to positive error in the output stage
Swirl-valve actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The DDE recognizes short circuit to ground error in the output stage
Swirl-valve actuator.
Test condition
The check frequency depends on the process sequence control.
Voltage condition
The check frequency depends on the process sequence control.
The diagnostic trouble code is logged when the vehicle speed is below the minimum threshold 5 km/h.
Test condition
The test frequency depends on the time grid of the process.
Voltage condition
The test frequency depends on the time grid of the process.
The diagnostic trouble code is logged when the vehicle speed transmitted through the CAN bus is invalid.
Test condition
The vehicle speed is received via the CAN bus. The check frequency depends on the process sequence control.
Voltage condition
The vehicle speed is received via the CAN bus. The check frequency depends on the process sequence control.