Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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The Electronic Power Steering (EPS) detects front steering rack calibration data is missing
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On startup, EPS detects front steering rack calibration data is missing
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Steering rack control is blocked. Steering performance may be degraded
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No
|
|
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DCDC does not have enough cooling, DCDC system may limit its output power
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DCDC converter detects difference in ambient temperature vs. DCDC converter temperature exceeding threshold, indicating that cooling may not be sufficient
|
No impact
|
No
|
|
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PCS DCDC timed out attempting to precharge HV bus
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DCDC converter timed out when attempting to precharge HV bus
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Inability to precharge HV bus, inability to support 12V system, inability to drive
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No
|
|
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PCS has detected at least one damaged AC charging phase, AC charging power will be limited
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Power conversion system detected reset while enabling a phase, and did not attempt to re-enable phase
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Reduced AC charge rate or inability to AC charge
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No
|
|
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HV bus voltage unsafe for drive inverter while PCS DCDC is attempting to precharge HV bus
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DCDC converter detected high voltage bus voltage profile anomoly during precharge
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Inability to precharge HV bus, inability to support 12V system, inability to drive
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No
|
|
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AC charging is stopped because DCDC is too hot
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DCDC converter temperature exceeds threshold for more than five seconds while AC charging is active
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Inability to AC charge
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No
|
|
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Steering system may be reducing power and functionality to prevent overheating, due to higher than nominal system temperature detected
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When part of steering system is detected to be close to its overheating limit
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Torque output may be reduced, and steering system may have reduced performance
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No
|
|
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PCS EEPROM software module has detected an error
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Power conversion system EEPROM software module has detected an error
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Kilowatt-hour counter functionality may be impacted, damaged phase detection may be impacted
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No
|
|
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Motor position sensor is not calibrated
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On startup, Electronic Power Steering (EPS) detects motor position sensor calibration is incomplete
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Motor torque may not be generated
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No
|
|
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The steering monitor detected an error affecting its calibration
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One or more modules not calibrated or calibration values do not match controller values
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Loss of steering redundancy
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No
|
|
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The Electronic Power Steering (EPS) monitor is missing calibration data for the steering rack
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Uncalibrated front steering rack detected
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Steering control from this node is disabled
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No
|
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One or more of the messages the vehicle controller receives periodically from the right Electronic Park Brake (EPBR) electronic control unit (ECU) is not received, indicating the EPBR ECU may be unavailable (MIA).
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The vehicle controller does not receive one or more of the expected messages from the EPBR ECU within the expected time frame.
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The parking brake may be unavailable or may not function as expected.
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No
|
|
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The Power Conversion System (PCS) electronic control unit (ECU) detects a wobble signature from the Tesla Powerwall.
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The PCS ECU detects a wobble signature from the Tesla Powerwall.
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No expected impact on vehicle functionality.
|
No
|
|
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The Power Conversion System (PCS) electronic control unit (ECU) detects the DCDC tank current period is too long, indicating the DCDC metal-oxide-semiconductor field-effect transistor (MOSFETs) are not switching properly.
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The PCS ECU detects the DCDC MOSFETs are not switching properly.
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Vehicle is unable to drive, charge, or support the low voltage (LV) battery / electrical system until the DCDC MOSFETs switch properly.
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No
|
|
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The Power Conversion System (PCS) electronic control unit (ECU) detects the electrical grid frequency droops below its nominal level, indicating the grid may be experiencing heavy loads.
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The PCS ECU detects the electrical grid frequency droops below its nominal level.
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AC charging power will be temporarily limited depending on the droop level to reduce the load on the electrical grid.
|
No
|
|
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The Power Conversion System (PCS) electronic control unit (ECU) detects its DCDC converter is unable to regulate the voltage slew rate while the high voltage (HV) bus is discharging, causing the HV bus to discharge outside of the specified slew rate threshold.
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The PCS ECU detects the DCDC converter is unable to regulate the voltage slew rate while the HV bus is discharging.
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Vehicle will be unable to precharge. Guobiao direct current (GB DC) and CHAdeMO DC fast charging (FC) may not start or may be interrupted due to CHAdeMO and GB DC compatibility conditions.
|
No
|
|
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The Power Conversion System (PCS) electronic control unit (ECU) detects irrational intermediate bus voltage behavior.
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The PCS ECU detects the intermediate bus voltage ripple peak-to-peak value for the charger phase exceeds the specified threshold.
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The rate of AC charging may be reduced, or AC charging may be unavailable.
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No
|
|
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The Power Conversion System (PCS) electronic control unit (ECU) detects the charging power is limited due to excessive intermediate bus voltage ripples, which may be caused by electrolytic capacitor degradation.
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The PCS ECU detects charging power is limited for more than 10 minutes due to excessive intermediate bus voltage ripples. Alert log signal data should provide more information on the specific condition(s) detected.
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The rate of AC charging may be limited by the PCS.
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No
|
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The Power Conversion System (PCS) electronic control unit (ECU) detects the micro grid frequency significantly droops below the expected operating threshold, indicating the micro grid is overloaded.
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The PCS ECU detects the micro grid frequency significantly droops below the specified threshold.
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AC charging will be unavailable to help reduce the load on the micro grid.
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No
|
|
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PCS detects one of its logical power rail's measurement becomes irrational
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Power conversion system detects that a logical power rail voltage is outside expected range for more than one second
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Inability to precharge HV bus, inability to support 12V system, inability to AC charge, inability to drive
|
No
|