Alerts
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| Signal Name | Description | Condition | Impact |
|---|---|---|---|
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The battery management system (BMS) has detected that a module is overheating.
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A thermistor reports a module temperature above the acceptable range.
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Power is reduced.
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A software tool (such as Toolbox) connected to the vehicle requests an action from the battery management system (BMS) that is either improperly requested or is not permitted in the current BMS state.
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A software tool improperly requests an action from the BMS or requests an action that is not permitted.
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The requested diagnostic function is not performed.
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An uncorrectable error has been detected in the OTP-EPROM register bank for a battery monitoring board (BMB).
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A BMB TI536 ASIC chip has set the ECC_ERR bit in the ALERT_STATUS register.
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OTP register(s) are not valid. The BMS will attempt to reset all of the TI536 ASICs and reenumerate them.
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The battery management system (BMS) has detected an issue with the voltage sensor harness (VSH) connector on the battery monitoring board (BMB).
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The BMS detects that the impedance of the VSH connector is above the limit threshold.
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The vehicle operates normally. This alert indicates that there may be an issue, and if impedance becomes too high the vehicle will not charge or drive (VOR).
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The Complex Programmable Logic Device (CPLD) of the High Voltage (HV) Battery Management System (BMS) detects a blind mate fault bit.
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The CPLD of the HV BMS detects a blind mate fault bit. The HVIL is on and HVIL voltage is greater than the blind mate alert threshold. The CPLD and the BMS concurrently detect the HVIL loop through the HV connector on the battery may not be connected.
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The HV connector on the battery pack is not connected to the HVIL loop. HVIL behavior may be affected.
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The vehicle detects a communication issue between the Battery Management System (BMS) and one or more of the Battery Monitor Boards (BMBs).
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One or more of the BMBs reports a communication issue to the BMS.
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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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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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The vehicle has detected a condition preventing fast charging.
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A condition that prevents fast charging is present on the vehicle.
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The vehicle is unable to fast charge, but AC charging still operates as designed.
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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. Note: This Threshold comes via CAN from UI Data Field -> GTW -> BMS via MCU_dSocAlertThreshold.
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If set and MCU_dSocAlertEnable=1, max charge may be limited; see BMS_u029_dSoc_Limiting.
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The Fast Charge (FC) contactors are not ready for precharge.
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The FC contactors are welded or the reported charge port state does not meet the expected state.
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The vehicle is temporarily unable to charge.
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The battery management system (BMS) detects that the pack voltage does not match the sum of module voltages.
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The BMS detects that the pack voltage does not match the sum of module voltages.
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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 a battery monitoring board (BMB) fails the wake up alarm self test.
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The BMS detects an issue with the BMB wake up alarm self-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 a brick voltage measurement that is inaccurate.
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A brick reports an inaccurate voltage measurement to the BMS. Alert log signal data provides information on the specific inconsistency.
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Inability to charge, drive, or support the low voltage (LV) system
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A battery monitoring board (BMB) detects that both of the thermistors on a module are reporting out-of-bounds temperatures.
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A battery monitoring board (BMB) detects that both of the 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 that a thermistor on a module is shorted or railed.
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A battery monitoring board (BMB) detects that any of the thermistors on a module is reporting an out-of-bounds temperature.
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The vehicle operates normally with only one thermistor on the module.
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The battery management system (BMS) detects that one or several battery monitoring boards (BMB) are unable to enumerate when the vehicle starts.
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The battery management system (BMS) detects that one or several battery monitoring boards (BMB) are unable to enumerate when the vehicle starts.
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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 internal issue with the flash memory on a battery monitoring board (BMB).
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The BMS detects an issue with the random-access memory (RAM) on a BMB.
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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 temperature of a module is too high.
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A battery monitoring board (BMB) reports a module temperature above the set threshold.
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Inability to charge, drive, or support the low voltage (LV) system
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A battery monitoring board (BMB) reports to the battery management system (BMS) that it is overheating.
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A BMB reports a temperature above the maximum threshold.
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Inability to charge, drive, or support the low voltage (LV) system
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A battery monitoring board (BMB) reports a power-on reset event, indicating that the BMB may have previously been unavailable for communication with the battery management system (BMS).
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Any BMB experiences a power loss or internal error that causes a power-on reset event.
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Inability to charge, drive, or support the low voltage (LV) system
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