Alerts

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.

There may be a decrease in available energy to the vehicle, reducing range and LV support.

The BMS detects a VSH impedance value above the threshold.

Inability to charge, drive, or support the low voltage (LV) system

Impedance for one or more bricks exceeds the noise threshold for several measurement counts.

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.

The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.

Significant change in displayed range (range variation) while the vehicle was not used.

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)

BMS limp mode is triggered, with another alert present to indicate this condition.

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

Reduced maximum range and limited charging performance.

The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the imbalance threshold.

Reduced battery performance and reduced maximum range.

The absolute delta between the modeled thermistor temperature and the actual is greater than than the reset threshold OR the model inputs become valid

Modeled thermal gradient across pack will be reset to thermistor temperatures

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.

This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.

HVBATT_w724_deltaSocWeakShort is set and (UI_dSocAlertEnable==1 or dSocAlertEnabledByDefault==1).

The target max brick voltage for charge is limited to the voltage corresponding to 50% SOC.

A module temperature is above the warning temperature limit for X duration (in seconds)

Power/drive limits may be reduced

A brick voltage is above the fault voltage limit for X duration (in seconds)

The vehicle may not drive or charge.

The shunt current (discharge or charge) is above max current limit.

Not Available

The TREX bus is disconnected or is experiencing a condition affecting its functionality, causing it to enter the error passive state.

The TREX bus may be unable to communicate with other components.

The HVS bus is disconnected or is experiencing a condition affecting its functionality, causing it to enter the error passive state.

The HVS bus may be unable to communicate with other components, which will lead to vehicle being unable to drive or charge.

HVS bus is experiencing a condition affecting its functionality, causing it to enter the BusOff state.

The HVS bus is unable to communicate with other components, which will lead to vehicle being unable to drive or charge.

The HVC code module encounters error on the interface to its NVM.

The HVC cannot retain any non-volatile data.

The HVC encounters error on its NVM.

The HVC cannot retain any non-volatile data.

The HVC interface encounters error to its NVM.

The HVC cannot retain any non-volatile data.

HVBATT detects its LV input power is lower than the minimum required input voltage.

Vehicle may not drive or charge.