Alerts
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| Signal Name | Description | Condition | Impact |
|---|---|---|---|
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The battery management system (BMS) detects an issue with the high voltage (HV) internal current sensor.
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The measured current is sufficiently far from zero with contactors open, the current sensor is reporting the same current for too many samples in a row, or the current sensor is behaving irrationally (for example, it is dropping packets).
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) cannot communicate with the master charger and has reported it as missing (MIA).
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The BMS is not receiving one or more CAN communication messages from the master charger when expected.
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Inability to charge.
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The battery management system (BMS) cannot communicate with the high voltage (HV) battery internal current sensor and has reported it as missing (MIA).
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The BMS is not receiving one or more communication messages from the internal current sensor/shunt when expected.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) is not receiving communication from a battery monitoring board (BMB), indicating that the BMB may be unavailable (MIA).
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The BMS does not receive one or more of the expected voltage or temperature sensor readings from a BMB.
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Inability to charge, drive, or support the low voltage (LV) system
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This alert indicates potential corruption in the battery management system (BMS) board flash memory or RAM.
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The BMS detects an issue with the board flash memory or RAM.
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Inability to charge, drive, or support the low voltage (LV) system
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This is an engineering diagnostic alert. It indicates that the software noticed something unexpected but still ended up in an expected state condition. If this alert persists, it may indicate an issue in the production code.
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An assertion in the software is false.
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This alert is primarily informational and is used for logging purposes.
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The battery management system (BMS) has detected that there is an over voltage event external to the high voltage (HV) battery.
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The BMS detects that the bus voltage is higher than maximum voltage threshold.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) detects that the negative contactor remains open during the first 2 seconds of pack contactors attempting to close.
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The BMS detects that the negative pack contactor is welded.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) detects that the positive contactor remains open during the first 2 seconds of pack contactors attempting to close.
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The BMS detects that the positive pack contactor is welded or broken.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) detects an issue with the high voltage interlock loop (HVIL). The voltage at the HVIL output pin of the BMS is too low (in respect to the number of HVIL nodes the vehicle has) or too close to the HVIL open voltage.
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HVIL output voltage sensed by the BMS is outside of the expected bounds.
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Inability to charge, drive, or support the low voltage (LV) system
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There is an external or internal isolation alert while pack contactors are closed.
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The BMS detects that isolation is below the minimum threshold while contactors are closed.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) detects that there is an isolation sensor error.
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The BMS runs into an abnormality during the isolation circuit test.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) detects that there was loss of power to pack contactors while they are closed. The BMS assumes that the pyro fuse on the contactor power supply signal blew during a crash.
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The BMS detects that there is a loss of power to pack contactors while they are closed.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) detects that bus voltage is not reducing quickly enough.
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The BMS detects that the DC link voltage has not discharged to below 60V within 5 seconds of opening the contactors.
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Power is reduced.
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The battery management system (BMS) has detected that the HV battery precharge resistor is above the maximum operating temperature.
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The BMS detects that pack contactors have opened and closed too many times in a short period of time.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) has detected that the charge port door is open and the fast charge (FC) contactors are welded.
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The BMS detects that the charge port door is open and the FC contactors are welded.
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Inability to charge, drive, or support the low voltage (LV) system
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The battery management system (BMS) senses that the current sensor is undergoing a hard reset.
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The battery management system (BMS) detects that a hard reset begins.
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This alert is primarily informational and used for logging purposes.
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The battery management system (BMS) detects that the standard deviation of isolation resistance while in drive is high.
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The BMS detects that the standard deviation of the high voltage (HV) isolation is outside of the set threshold.
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This alert is primarily informational and indicates a potential isolation issue.
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The battery management system (BMS) detects that there was a repeated loss of isolation during drive.
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The BMS detects that isolation dropped multiple times below the minimum threshold while driving.
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The vehicle will not start.
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The battery management system (BMS) detects that pack contactors have been disabled.
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The BMS detects a condition that requires the contactors to stay open until they are serviced.
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Inability to charge, drive, or support the low voltage (LV) system
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