Alerts
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| Signal Name | Description | Condition | Impact |
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The low voltage battery management system (LVBMS) has opened the low voltage (LV) battery's internal protection transistor (MOSFET), disconnecting the LV battery from the rest of the vehicle electrical systems.
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The LVBMS reports the LV battery's internal protection transistor (MOSFET) is open.
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The LV battery is unable to support vehicle electrical systems or to recharge via the power conversion system (PCS). 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.
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One or more of the messages the vehicle controller receives periodically from the Low Voltage Battery Management System (LVBMS) is not received, indicating the LVBMS may be unavailable (MIA).
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The vehicle controller does not receive one or more of the expected messages from LVBMS within the expected time frame over the local interconnect network (LIN).
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Vehicle functions that depend on the low voltage battery controllers may be unavailable or may not function as expected.
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The low voltage battery management system (LVBMS) reports the low voltage (LV) battery's internal protection transistor (MOSFET) has opened and it is not recoverable by the vehicle. However, the LV battery may be recoverable using an external LV Lithium Ion Battery charger tool. A separate alert will indicate whether the battery requires replacement.
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The LVBMS reports to the vehicle controller that the LV battery is not recoverable due to any of the following conditions: depleted LV battery state of charge (SoC) due to deep discharge; one or more cell voltage(s) at less than its threshold; the sum of all cell voltages is less than its threshold.
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The LV battery is not recoverable by the vehicle. If recovery via an external charger tool is unsuccessful, replacement will be necessary.
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The front vehicle controller has opened the voltage supply circuit to the Steering Feedback.
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A fault is reported by the Steering Feedback eFuse circuitry.
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Functions on the Steering Feedback will no longer work.
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The front vehicle controller (VCFRONT) detects the front drive inverter (DIF) eFuse has tripped (circuit opened), interrupting electrical power supply to the DIF. Powertrain performance may be limited.
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The VCFRONT detects the eFuse circuit gating low voltage (LV) power to the DIF as open (tripped).
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Powertrain performance may be limited.
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A Low Voltage (LV) battery pack brick voltage is above the over voltage limit for an extended time period.
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A battery pack brick voltage is greater than the over voltage limit for an extended time period.
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Vehicle may be unable to drive.
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The eFuse application-specific integrated circuit (ASIC) on the vehicle controller is in an unexpected state.
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Vehicle controller eFuse ASIC is not in the requested state
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Vehicle Controller eFuse ASIC may not turn on or off as expected
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An internal condition affecting left headlamp functionality has been detected - certain light functions or the headlamp fan may be degraded or disabled.
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The SSL100 pixel matrix detects non-functional pixels or has communication issues, or the voltage measured across the boost rail, Lowbeam Prefield, DRL1/2/3, or Turn LEDs is out of range, or the LED drivers in the ECU have reported status flags, or certain values programmed in the SSL100 EEPROM are out of range, or the fan current is out of range.
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Certain light functions or the headlamp fan may be degraded or disabled. These functions will retry after the next headlamp power cycle (which occurs during sleep)
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The front vehicle controller (VCFRONT) detects the three-way valve has encountered a condition preventing it from performing as designed.
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The three-way valve encounters a condition preventing it from performing as designed. Alert log signal data should provide more information on the specific condition(s) detected.
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Vehicle functions that rely on the three-way valve may be limited or unavailable.
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The vehicle controller detects there is voltage mismatch greater than 0.5V between the input power to the front vehicle controller (VCFRONT) and steering feedback circuit.
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The voltage mismatch is greater than 0.5V between the VCFRONT printed circuit board assembly (PCBA) input voltage and the eFuse output voltage.
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Steering wheel feedback functionality may be limited or unavailable.
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The front vehicle controller (VCFRONT) detects the power conversion system (PCS) eFuse has exceeded 133 degrees C. The PCS eFuse circuit may open (trip) if low voltage (LV) electrical system loads are not reduced to 175A or less. VCFRONT is shedding some vehicle electrical loads by cutting power to less essential electronic control units (ECUs).
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The PCS eFuse temperature is detected as greater than 133 degrees C for 500 milliseconds.
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Some convenience features will be unavailable as VCFRONT limits LV electrical system current draw by cutting power to some electronic control units (ECUs).
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An internal condition affecting right headlamp functionality has been detected - certain light functions or the headlamp fan may be degraded or disabled.
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The SSL100 pixel matrix detects non-functional pixels or has communication issues, or the voltage measured across the boost rail, Lowbeam Prefield, DRL1/2/3, or Turn LEDs is out of range, or the LED drivers in the ECU have reported status flags, or certain values programmed in the SSL100 EEPROM are out of range, or the fan current is out of range.
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Certain light functions or the headlamp fan may be degraded or disabled. These functions will retry after the next headlamp power cycle (which occurs during sleep)
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The vehicle controller detects a discrepancy in the estimated refrigerant flow rates between the A/C compressor and recirculation electronic expansion valve (EXV) as the estimated refrigerant flow index is higher than expected while the subcool is low.
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The estimated refrigerant flow index is above the expected level, and the subcool is low.
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Cabin climate control system air conditioning and heating may be limited or unavailable. Battery heating and cooling performance may be limited.
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The flow index value is low at high subcool. The refrigerant flow rate through the electronic expansion valves (EXV) is not meeting the expected value when compared to the compressor refrigerant flow rate.
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The vehicle detects that refrigerant flow index is below expected levels and subcool is high.
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The thermal system may not perform as expected.
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The vehicle controller detects the actual A/C compressor power is lower than expected.
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The A/C compressor power index is lower than expected.
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Cabin climate control system air conditioning and heating may be limited or unavailable. Battery heating and cooling performance may be limited.
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The vehicle controller detects a discrepancy in the estimated refrigerant flow rates between the A/C compressor and recirculation electronic expansion valve (EXV) as the estimated refrigerant flow index is higher than expected while the subcool is high.
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The estimated refrigerant flow index is above the expected level, and the subcool is high.
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Cabin climate control system air conditioning and heating may be limited or unavailable. Battery heating and cooling performance may be limited.
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Difference between the discharge pressure and liquid pressure (Pd-Pl) increased. Discharge lines or Liquid Cooled Condenser (LCC) or Shut Off Valve (SOV) may be blocked.
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Pd-Pl is greater than 6 bar for 5 consecutive seconds.
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Thermal performance is degraded.
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The vehicle controller detects the front trunk (also known as the frunk) sensor requires service as a condition affecting functionality has been detected on one or more of the frunk latch switches.
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May set due to any of the following: (1) one of the switches is pressed while the other is not pressed; (2) one or more of the frunk latch switches on the frunk sensor are shorted, disconnected, or in an indeterminate voltage range.
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The frunk may not function as expected. For example, the user interface (UI) on the center display may show the frunk as open when it is actually closed.
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The vehicle controller detects that the Thermal Fill Drain service routine is being run while the vehicle is in Drive.
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The Thermal Fill Drain service routine is run.
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Cabin climate control system air conditioning and heating may be limited or unavailable. Powertrain performance may be limited.
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The vehicle controller detects the isentropic check for the refrigerant discharge temperature (TD) is unsuccessful, indicating the A/C compressor mass flow rate is below the expected level.
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The isentropic check for the TD is unsuccessful.
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Cabin climate control system air conditioning and heating may be limited or unavailable. Battery heating and cooling performance may be limited.
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