Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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Right Rear Wheel Speed Sensor Supply Line Short to Gnd
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Short circuit of the WSS supply line to GND.
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Will disable VDC/TC and degrade ABS
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No
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The CAN Bus status is monitored cyclically, when ever there is a short circuit between CAN-H and CAN-L or a heavy bus disturbance which leads to BusOff, the fault is registerd
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ESP is not receiving any message traffic on PARTY bus
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VDC/TC disabled
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No
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The CAN Bus status is monitored cyclically, when ever there is a line interruption on can bus or disturbance which leads to Error passive, fault is registerd
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ESP is not receiving any message traffic on PARTY bus
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VDC/TC disabled
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No
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The CAN Bus status is monitored cyclically, when ever there is a short circuit between CAN-H and CAN-L or a heavy bus disturbance which leads to BusOff, the fault is registerd
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ESP is not receiving any message traffic on CHASSIS bus
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VDC/TC disabled
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No
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The CAN Bus status is monitored cyclically, when ever there is a line interruption on can bus or disturbance which leads to Error passive, fault is registerd
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ESP is not receiving any message traffic on CHASSIS bus
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VDC/TC disabled
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No
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ESP is providing hydraulic boost due to power brakes failure
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ESP has lost communication with the iBooster, or iBooster has lost the ability to support brake boost
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Brake boost functionality degraded
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No
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Invalid Data Received From Steering Angle Sensor Module: Invalid Signal Status
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EPAS3P_internalSASQF is received as invalid
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May fault VDC/TC, ABS performance degradation
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No
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Invalid Data Received From Steering Angle Sensor Module: Invalid Signal Status
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EPAS3P_internalSAS fails plausibility check for center position
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May fault VDC/TC, ABS performance degradation
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No
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Steering Wheel Position Sensor: Constant signal detected
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EPAS3P_internalSAS is frozen on CAN
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May fault VDC/TC, ABS performance degradation
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No
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Steering Wheel Position Sensor: Adjustment not possible (Offset too large)
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Steering offset received from EPAS outside of threshold
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May fault VDC/TC, ABS performance degradation
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No
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Steering Wheel Position Sensor: Plausibility fault
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The monitoring checks for a physically plausible steering angle signal and consists of following parts:- Sas range monitoringReceived raw sensor hardware value is higher than the maximum, physical steering wheel turn from zero-position to lock in the vehicle (LwAnschlMax) + an additional robustness tolerance value (typical 90 deg)- Sas gradient monitoringIf the signal gradient (steering angle velocity) from one 20 ms-cycle to another is higher than 40 deg for 2 SAS Messages (60 deg for more than 2 SAS messages or no SAS message counter) or - change of this gradient (steering angle acceleration) is higher than 30 deg a failure will be set.- Sas plausibility versus yaw rateThe difference between measured steering angle signal and model value calculated from yaw rate signal is evaluated for fault detection. Dependent on the driving conditions failures in size of (10 + 60 [m/s] / velocity [m/s]) deg at steering angle are recognized through three possible recognition paths evaluating stable driving conditions. This is to prevent a fault recognition due to unstable driving.When the difference is caused by a fault of the steering angle sensor a steering sensor angle fault will be entered. The sensor - yaw rate sensor(YRS) or steering angle sensor(SAS) - showing the largest deviation to the reference yaw rate is marked as faulty.
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May fault VDC/TC, ABS performance degradation
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No
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Steering Wheel Position Sensor: Plausibility fault
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This monitoring detects a wrong sign of steering angle signal. The yaw rate calculated from steering angle and the yaw rate calculated from the wheel speed sensors are compared. If the measured yaw rate fits to the model yaw rate positive integrals (IVzLwVA and IVzLwHA) are calculated but if the negative values fits the integrals will become negative. A fault is determined if the integral value is negative and forward driving is recognized. This fault will cause a release test in the following ignition cycle to assure that the sensor is build in correctly. This fault can also be caused by swapped WSS lines at one axle. It requires a release check in the following ignition cycle to prevent system release when the fault is still present. The conditions for release is positive integrals (IVzLwVA and IVzLwHA) > +180 deg.
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May fault VDC/TC, ABS performance degradation
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No
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Invalid Data Received From Air Bag Control Module : Invalid Yaw Signal Status
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Yawrate signal received from RCM exceeds message latency specification
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May fault VDC/TC, ABS performance degradation
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No
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Invalid Data Received From Air Bag Control Module : Invalid Yaw Signal Status
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Inertial signal failed plausibility/integrity checks
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May fault VDC/TC, ABS performance degradation
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No
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Invalid Data Received From Air Bag Control Module : Invalid Yaw Signal Status
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Inertial signal failed plausibility/integrity checks
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May fault VDC/TC, ABS performance degradation
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No
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Invalid Data Received From Air Bag Control Module : Invalid Yaw Signal Status
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Inertial signal failed plausibility/integrity checks
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May fault VDC/TC, ABS performance degradation
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No
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Yaw Rate Sensor: Plausibility against second signal failed
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Inertial signal failed plausibility/integrity checks
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May fault VDC/TC, ABS performance degradation
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No
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Yaw Rate Sensor: Plausibility against second signal failed
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Inertial signal failed plausibility/integrity checks
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May fault VDC/TC, ABS performance degradation
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No
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Invalid Data Received From Air Bag Control Module : Invalid Ay Signal Status
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Inertial signal failed plausibility/integrity checks
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May fault VDC/TC, ABS performance degradation
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No
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Invalid Data Received From Air Bag Control Module : Invalid Ay Signal Status
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Inertial signal failed plausibility/integrity checks
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May fault VDC/TC, ABS performance degradation
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No
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