Alerts
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| Signal Name | Description | Condition | Impact |
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The battery management system (BMS) forced pack contactors open due to one or more alerts.
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One or more BMS alerts that force pack contactors are open.
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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 measure the temperature on any module.
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A battery monitoring board (BMB) detects that both thermistors on a module are reporting out-of-bounds temperatures.
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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 a missing, incorrect, or unsupported part number.
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The BMS detects an unexpected part number.
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The BMS is unable to initialize parameters related to printed circuit board assembly (PCBA) configuration.
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The battery management system (BMS) detects a missing, incorrect, or unsupported config block.
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The BMS detects that the config block is missing.
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The BMS is unable to initialize configuration parameters.
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The battery management system (BMS) detects a battery monitoring board (BMB) application-specific integrated circuit (ASIC) configuration that is not supported.
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The BMS calibration block is configurated for a BMB ASIC type that is not supported.
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The BMS may be unable to obtain battery pack measurements.
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The battery management system (BMS) has detected that a brick is over-discharged.
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The BMS detects that a brick voltage measured below the minimal threshold.
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Inability to charge, drive, or support the low voltage (LV) system
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A State of Charge (SOC) based on Open Circuit Voltage (OCV), known as SocByOcv, correction of greater than 3% to high voltage (HV) battery SOC occurred during the previous resting period (time vehicle was not used). This may cause a significant change in displayed range.
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The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% based on SocByOcv (State of Charge by Open Circuit Voltage) while the vehicle rested (was not used).
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Significant change in displayed range (range variation) while the vehicle was not used.
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The battery management system (BMS) detects that the high voltage processor (HVP) configuration doesn't match.
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The BMS detects an HVP configuration that does not match the expected configuration.
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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 a large calculated amp-hour capacity (CAC) update.
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The BMS detects a change in CAC above the limit threshold.
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This alert is primarily informational.
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The battery management system (BMS) detects that the high voltage (HV) isolation contactor closed below the warning threshold.
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The BMS detects that the HV isolation was below the warning threshold when pack contactors closed.
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This alert indicates that HV isolation is low, but above the sufficient level for vehicle operation.
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The battery management system (BMS) detected a condition that indicates a BMB device fault.
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Any BMB device in the daisy chain reports any of the monitored fault indicators.
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This alert is primarily informational, and may indicate a potential BMB hardware failure that results in unreliable measurement data.
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The battery management system (BMS) has detected a mismatch between the pack voltage and DC Link voltage.
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The battery management system (BMS) has detected a mismatch between the pack voltage and DC Link voltage.
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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 one or more module temperatures exceed the warning threshold.
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The maximum module temperature is greater than the warning threshold.
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Vehicle performance is limited.
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An uncorrectable error has been detected in the OTP (one-time programmable) memory for a battery monitoring board (BMB) device.
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Any BMB device reports an uncorrectable error in the OTP memory.
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This alert is primarily informational and is used for logging purposes. BMB device behavior may be impacted.
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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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The bleed FET will prevent the battery from properly balancing the brick by bleeding the voltage down. There is a decrease in available energy to the vehicle potentially leading to decreased range.
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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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The battery management system (BMS) detects that the shunt is missing (MIA).
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The BMS does not receive one or more expected CAN messages from the shunt.
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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 shunt is unavailable (SNA).
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The BMS does not receive consecutive current readings from the high voltage processor (HVP).
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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 a coolant flood in the high voltage battery.
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The BMS detects that isolation dropped below the minimum threshold when pack contactors are open and the low coolant signal is active.
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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 low high voltage isolation when pack contactors are opened.
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The BMS detects that isolation dropped below the minimum threshold when pack contactors were open.
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Inability to charge, drive, or support the low voltage (LV) system
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