Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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Vehicle will enter deep sleep to conserve energy in 10 minutes. It is possible to wake the vehicle up within the next 10 minutes by pressing the trunk button or applying external voltage to the front trunk (frunk) access posts.
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The vehicle is in Transport Mode and the high voltage (HV) battery state of charge (SOC) is low.
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Vehicle will only wake from deep sleep via a trunk button press or when external voltage is applied to the frunk access posts.
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No
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The eFuse application-specific integrated circuit (ASIC) on the vehicle controller has incorrect thresholds set.
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The vehicle controller detects incorrect threshold values on its eFuse ASIC for 1 second.
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The eFuse ASIC on the vehicle controller may not function as expected.
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No
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The low voltage battery management system (LVBMS) reports it has detected the charge current is above the maximum limit for the low voltage (LV) battery cells in their present condition.
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The LVBMS detects the charge current is above the maximum limit for the LV battery cells in their present condition for 1 second.
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Exceeding charge current limits may shorten the life of LV battery cells, leading to accelerated degradation and replacement.
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No
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The vehicle is attempting to recover from a deep sleep. If the vehicle does not begin charging, the vehicle will reenter deep sleep after 10 minutes.
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The vehicle is in Transport Mode, the high voltage (HV) battery state of charge (SOC) is low, and the user attempts to interact with the vehicle.
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Vehicle requires charging before it can be recovered from deep sleep. Until adequately charged, the vehicle will only wake from deep sleep via a trunk button press or when external voltage is applied to the frunk access posts.
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No
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Vehicle will enter deep sleep to conserve energy in 10 minutes. It is possible to wake the vehicle up within the next 10 minutes by pressing the trunk button or applying external voltage to the front trunk (frunk) access posts.
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The vehicle is in Transport Mode and the high voltage (HV) battery state of charge (SOC) is low.
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Vehicle will only wake from deep sleep via a trunk button press or when external voltage is applied to the frunk access posts.
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No
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The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a pack overvoltage condition.
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The LVBMS detects a pack overvoltage condition affecting the LV battery.
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The LV battery may be damaged and may be unable to support vehicle electrical systems.
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No
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The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a cell overvoltage condition.
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The LVBMS detects a cell overvoltage condition affecting the LV battery.
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The LV battery may be damaged and may be unable to support vehicle electrical systems.
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No
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The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a cell undervoltage condition.
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The LVBMS detects a cell undervoltage condition affecting the LV battery.
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The LV battery may be damaged and may be unable to support vehicle electrical systems.
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No
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The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a charge overcurrent condition.
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The LVBMS detects a charge overcurrent condition affecting the LV battery.
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The LV battery may be damaged and may be unable to support vehicle electrical systems.
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No
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The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a hardware overcurrent condition.
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The LVBMS detects a hardware overcurrent condition affecting the LV battery.
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The LV battery may be damaged and may be unable to support vehicle electrical systems.
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No
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The electrical current flowing through the left vehicle controller (VCLEFT) eFuse is greater or equal to 100A. The VCLEFT eFuse circuit may open (trip) if the low voltage (LV) electrical system loads are not reduced. The vehicle controller requests the VCLEFT to shed vehicle electrical loads by cutting power to the less essential loads.
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The VCLEFT eFuse current value equals or exceeds 100A for 100 milliseconds.
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Some convenience features controlled by the VCLEFT will be unavailable as the vehicle controller limits the LV electrical system current draw by cutting power to some loads.
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No
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The vehicle controller detects a condition (or conditions) preventing the low voltage (LV) battery internal protection transistor (MOSFET) from closing so the LV battery can be recovered. However, the LV battery may be recoverable using an external LV Lithium Ion Battery charger tool.
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A condition or combination of conditions prevents the LV battery internal protection transistor (MOSFET) from closing so the LV battery can be recovered. Alert log signal data should provide more information.
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The LV battery cannot be recovered while any condition blocking its internal protection transistor (MOSFET) from closing persists. The LV battery is unable to support vehicle electrical systems or to recharge via the power conversion system (PCS) until the internal protection MOSFET closes and recovery begins.
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No
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The low voltage (LV) battery is in a critical state and the vehicle controller is about to trigger a graceful exit from drive (also known as a graceful power-off, or GPO). At least one other alert should be present when the vehicle starts to exit drive / graceful power-off occurs.
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May set due to a condition or combination of conditions indicating the LV battery cannot support the vehicle, including: the LV battery internal protection transistor (MOSFET) is open, the reverse battery eFuse has tripped (is open), or the vehicle controller is actively shedding vehicle electrical loads to conserve energy for essential functions. Alert log signal data should provide more information.
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The vehicle will exit drive within the next few minutes, with a separate alert present to indicate that condition, and the next drive cycle will be blocked.
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No
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The vehicle controller detects the low voltage (LV) battery is not within an acceptable temperature range to support vehicle electrical systems during an over-the-air (OTA) vehicle software update.
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The vehicle controller detects the LV battery temperature dropping below -20 degrees Celsius for more than 5 consecutive seconds.
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As the vehicle relies on LV battery support while installing software packages, any attempted vehicle software update will be blocked to prevent loss of electrical power during the update sequence.
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No
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The low voltage (LV) battery internal protection transistor (MOSFET) is open, while the LV battery is at low state of charge and recovering the MOSFET is not being attempted. As a result, the low voltage battery management system (LVBMS) continues to draw power from the cells, which may make the LV battery unrecoverable if it is not disconnected soon.
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The LV battery state of charge (SOC) is less than 30%, the LV battery internal protection transistor (MOSFET) is open, and there are no low voltage battery management system (LVBMS) communication or firmware mismatch issues.
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The LV battery may become too deeply discharged and unrecoverable.
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No
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Warns if the processor has experienced a reset due to power loss.
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Sudden power loss.
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Controller is MIA for some time.
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No
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The vehicle controller (VC) identified the PCS is MIA and may be in need of a power cycle to be recovered. This alert indicates the low voltage (LV) battery is in good state to support this.
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The PCS is MIA when expected to be active on CAN, the LV battery is connected, the vehicle is not in service mode, and the vehicle is not being updated.
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The PCS may be power cycled by the high voltage system.
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No
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A low voltage (LV) battery recovery attempt has timed out and has been aborted, and the internal protection transistor (MOSFET) has been opened. May occur because an external power supply is connected to the LV battery, or due to a high impedance connection between the power conversion system (PCS) and LV battery. The low voltage battery management system (LVBMS) reports a FAULT state.
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The LVBMS reports an LV battery recovery attempt has timed out and has been aborted because 50 seconds have passed without the LVBMS detecting adequate current flow to the LV battery across the internal protection transistor (MOSFET).
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The high voltage (HV) system will remain energized to continue supplying electrical power to the vehicle while the LV battery is unavailable. This may result in greater range loss than expected, increased HV system energy consumption when the vehicle is idle, and prevent the vehicle from sleeping. The vehicle will be unable to drive while this alert persists.
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No
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The MCU Logic eFuse has tripped.
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Too much current detected by the MCU Logic high side driver.
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Infotainment will not work.
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No
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The vehicle battery controller (VCBATT) has opened the voltage supply circuit to the Air Suspension Compressor.
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A fault is reported by the Air Suspension Compressor eFuse circuitry.
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Air Suspension function will no longer work.
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No
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