Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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Compressor usage above normal.
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Possible leak in system and insufficient air dryer regeneration
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No
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Circuit 1 reached max pressure level.
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No electronic governing or regeneration available, diagnostic available
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No
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Low pressure warning for circuit 1.
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May not be able to unpark and reduced service brake capability
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No
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Circuit 1 has defect.
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Decreased brake capability
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No
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An imbalance in the State of Charge (SOC) of the High Voltage (HV) battery has exceeded the warning threshold.
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The estimated imbalance between average SOC and minimum SOC is greater than the alert threshold
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Indication that SOC imbalance is increasing. Maximum range and charge will be reduced if imbalance continues to increase.
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No
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The battery management system (BMS) detects a possible state of charge (SOC) imbalance.
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The BMS detects that the difference between the most-charged brick and the least-charge brick in the high voltage (HV) pack is greater than the acceptable threshold.
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Maximum SOC is reduced to 50%.
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No
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A bleed Field-Effect Transistor (FET) on the Battery Management Board (BMB) is not operating as designed. This will prevent the battery from balancing the brick by decreasing the brick voltage.
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Upon a periodic wake, after an ECU reset, or every 6 hours, the Battery Management System (BMS) will test all bleed switches by switching them on in turn. If the sensed brick voltage does not significantly change, this alert is set.
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There may be a decrease in available energy to the vehicle, reducing range and LV support.
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No
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The battery management system (BMS) has detected a high voltage sense harness (VSH) impedance.
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The BMS detects a VSH impedance value above the threshold.
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Inability to charge, drive, or support the low voltage (LV) system
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No
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High impedance was detected on one or more bricks.
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Impedance for one or more bricks exceeds the noise threshold for several measurement counts.
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One or more cells in a brick are likely missing, resulting in a high impedance current path. Other potential causes are a high Direct Current Resistance (DCR), intermittent anode laser weld on the given brick(s), or an islanded brick.
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No
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A State of Charge (SOC) correction of greater than 3% in the Battery Pack occurred during the previous resting period.
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The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.
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Significant change in displayed range (range variation) while the vehicle was not used.
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No
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Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds acceptable threshold. This results in reduced battery performance and limits maximum range. Vehicle enters Battery Management System (BMS) limp mode.
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The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the alert set threshold (CAC imbalance is not within acceptable range)
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BMS limp mode is triggered, with another alert present to indicate this condition.
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No
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The battery management system (BMS) detects that the calculated Amp-hour capacity (CAC) difference between bricks within a single module exceeds the acceptable threshold, which may reduce battery performance.
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The BMS detects that the estimated CAC imbalance between the average CAC and the minimum CAC of bricks within a single module exceeds the acceptable threshold
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Reduced maximum range and limited charging performance.
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No
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The Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds the acceptable threshold. This results in reduced battery performance and limits maximum range.
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The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the imbalance threshold.
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Reduced battery performance and reduced maximum range.
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No
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A given brick has an alpha signal below the alert alpha threshold.
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The computed alpha estimate for a brick is repeatedly below the alert alpha threshold. The threshold comes over the Controller Area Network (CAN) via signal MCU_dSocAlertThreshold.
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This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
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No
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The battery management system (BMS) detects a condition internal to the high voltage (HV) battery that requires the max allowed brick voltage to be limited.
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HVBATT_w724_deltaSocWeakShort is set and (UI_dSocAlertEnable==1 or dSocAlertEnabledByDefault==1).
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The target max brick voltage for charge is limited to the voltage corresponding to 50% SOC.
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No
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A module temperature is above the warning temperature limit
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A module temperature is above the warning temperature limit for X duration (in seconds)
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Power/drive limits may be reduced
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No
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iBooster (IBST) detects a runtime overload: x1 task jitter of the IO sensitive part is too high.
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IBST detects a runtime overload.
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IBST may not operate as expected.
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No
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Warns if the shunt current (discharge or charge) is above max current limit.
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The shunt current (discharge or charge) is above max current limit.
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Not Available
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No
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The Range Extender (TREX) bus is in the error passive state.
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The TREX bus is disconnected or is experiencing a condition affecting its functionality, causing it to enter the error passive state.
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The TREX bus may be unable to communicate with other components.
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No
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The Range Extender (TREX) bus is in the BusOff state.
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TREX bus is experiencing a condition affecting its functionality, causing it to enter the BusOff state.
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The TREX bus is unable to communicate with other components.
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No
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