Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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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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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. 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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No
|
|
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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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No
|
|
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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
|
No
|
|
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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
|
No
|
|
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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
|
No
|
|
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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
|
No
|
|
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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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No
|
|
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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
|
No
|
|
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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
|
No
|
|
|
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
|
No
|
|
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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
|
No
|
|
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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
|
No
|
|
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A battery monitoring board (BMB) reports a brick over voltage event, indicating that the BMB has detected a brick voltage higher than the maximum allowed brick voltage threshold.
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A brick voltage exceeds the maximum allowed brick voltage threshold.
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Inability to charge, drive, or support the low voltage (LV) system
|
No
|
|
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A battery monitoring board (BMB) reports a brick under voltage event, indicating that the BMB has detected a brick voltage lower than the minimum allowed brick voltage threshold.
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A brick voltage drops below the minimum allowed brick voltage threshold.
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Inability to charge, drive, or support the low voltage (LV) system
|
No
|
|
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The Battery Management System (BMS) does not receive messages from the external fast charge equipment.
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The BMS does not receive one or more required signals from the external fast charge equipment.
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The vehicle is unable to fast charge, but AC charging still operates as designed.
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No
|
|
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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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No
|
|
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The battery management system (BMS) has detected an issue during the precharge process, and the pack contactors were unable to close.
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The BMS detects an issue during the precharge process. Alert log signal data provides information on the specific condition(s) detected.
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Inability to charge, drive, or support the low voltage (LV) system
|
No
|
|
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The battery management system (BMS) has detected that a pack contactor is not getting enough power.
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The BMS detects that a pack contactor input voltage dropped below the limit 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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There is an issue with the power supply to the battery management system (BMS), and the BMS system is operating at an out-of-bounds supply voltage.
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The BMS has detected that it is receiving supply voltage outside of the acceptable bounds.
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Inability to charge, drive, or support the low voltage (LV) system
|
No
|