Alerts
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| Signal Name | Description | Condition | Impact |
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The vehicle controller has determined the low voltage (LV) battery is no longer functional, as it has reached a low measured voltage with minimal Amp hours discharged.
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The vehicle controller detects the LV battery has reached a low voltage with minimal Amp hours discharged. Alert log signal data should provide more information, including the load current, battery temperature, and voltage dip measured.
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The LV battery may be unable to support the vehicle's electrical systems, or to successfully precharge the high voltage (HV) bus.
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The vehicle controller has detected a condition where the low voltage (LV) battery is unable to support vehicle electrical systems. The vehicle is likely to shut down if high voltage (HV) battery support for vehicle electrical systems via the power conversion system (PCS) is lost, so the HV system will remain energized to continue supplying electrical power to the vehicle until the alert clears.
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The LV battery is disconnected or showing degraded functionality, the LV battery internal protection transistor (MOSFET) is detected open, or the reverse battery eFuse has tripped (circuit is open).
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The LV battery is unable to support vehicle electrical systems. 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 refrigerant temperature sensors is faulted
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One or more of the refrigerant temperature sensors is faulted
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Refrigerant compressor may be impacted along with general HVAC functionality
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The vehicle controller detects output voltage from the air compressor for the air suspension system when none is expected. The vehicle controller's fused high current eFuse circuit will be used to deenergize the air compressor.
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Air compressor output voltage is detected when the air compressor has been requested off.
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The air compressor for the air suspension system is unavailable, making air suspension functionality limited or unavailable.
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The front vehicle controller (VCFRONT) detects the coolant level sensor is reporting low coolant or the coolant sensor is experiencing an electrical condition (short or disconnect).
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The coolant level sensor detects low coolant or an electrical condition (short or disconnect).
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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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Either or both the non-volatile memory (NVM) sets for pack data were not found or are invalid
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Invalid NVM data is provided for either set of pack records
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If neither set of records is found, pack data will not be tracked in NVM. If only one set is found, NVM data will only ever be tracked for a single pack
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The front trunk latch switches have never simultaneously reported an unpressed state. Alert state persists through vehicle sleep.
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Set during first initialization of the controller and sets again if the front trunk latch reports disconnected for greater than 20 seconds.
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This can indicate the front trunk latch sensing is degraded and stuck reporting as closed.
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The low voltage (LV) battery has failed a test 5 times that checks for shorted battery cells. May indicate the LV battery has at least one shorted cell and is unable to fully support the LV electrical system. Note: A single failure of this test does not reliably indicate a condition affecting LV battery function. Only after 5 failed tests will the vehicle controller set this alert.
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The LV battery has failed a shorted cell test at least 5 times. Alert log signal data should provide more information, including the load current, battery temperature, and voltage dip measured during testing.
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The LV battery has at least one shorted cell, which could prevent it from adequately supporting the vehicle's electrical systems.
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The front vehicle controller (VCFRONT) is inhibiting requests from the front trunk (or frunk) emergency release button while the vehicle is in motion due to unexpected frunk latch state transitions or conditions.
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May set due to any of the following: (1) frunk latch is stuck closed; (2) frunk latch transitioned to CLOSED state while vehicle is in motion; (3) frunk latch transitioned from OPEN to FAULT state while vehicle is in motion.
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The frunk will not release to the secondary latch position if the emergency release button is pressed while the vehicle is in motion.
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Unexpected front trunk (frunk) latch switch values are present, which may result in the frunk state not matching the state indicated in the touchscreen user interface (UI).
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Both front trunk (frunk) switches are pressed, or both frunk switches are unpressed, or any frunk switch is shorted / disconnected.
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The state of the front trunk (frunk) latch (open or closed) may be inaccurate. Front trunk (frunk) state may not match the state indicated in the touchscreen user interface (UI). For example, the UI may report the frunk as open when closed, or closed when open.
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The low voltage (LV) battery has failed a test that checks for shorted battery cells. May indicate the LV battery has a shorted cell and is unable to fully support the LV electrical system. Note: A single failure of this test does not reliably indicate a condition affecting LV battery function. Only after 5 failed tests will the vehicle controller set a separate alert indicating the LV battery has a shorted cell.
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The LV battery has failed a test checking for a shorted battery cell. Alert log signal data should provide more information, including the load current, battery temperature, and voltage dip measured during testing.
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The LV battery may have at least one shorted cell, which could prevent it from adequately supporting the vehicle's electrical systems.
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Low Voltage (LV) bus load reduction activated due to inability to precharge the High Voltage (HV) bus.
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The vehicle controller detects HV bus precharge is unsuccessful due to low LV Bus voltage.
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The Autopilot Electronic Control Unit (ECU), Media Control Unit (MCU), headlight, and sleep bypass LV power feeds are powered off (eFuses gating these power feeds are opened to reduce LV bus load).
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The wiper is experiencing a fault related to movement from/to the park position
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The wiper was commanded to move and did not move from park position within 2 seconds or did not return to park position within 10 seconds
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The wiper will not move when commanded. Wash pump will not be operational.
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The front vehicle controller (VCFRONT) detects that the Liquid Cooled Condenser (LCC) inlet solenoid is experiencing an electrical condition (short or disconnect).
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The LCC inlet solenoid is consuming less than 0.2Amps or greater than 2.0Amps when it is active.
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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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Collect debug information related to the wiper ECU
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ECU warnings are set
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None, collecting for debug
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HV Battery Discharge routine exited, the HV Battery Discharge will not run until reset conditions are met.
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System condition for the HV Battery Discharge routine are not met and the routine is exiting.
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Refer to HV Battery Discharge routine documentation.
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HV Battery Discharge routine is running with reduced power, the battery will discharge at a lower rate than expected.
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System condition are not met for full power discharge of the HV battery.
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Refer to HV Battery Discharge routine documentation.
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A sudden transition out of Accessory Plus state was requested, where entertainment and media may have been actively used while in Park (including Arcade Mode or Theater Mode). Drive will be unavailable for 10 seconds while the vehicle transitions to ensure that adequate electrical power is available to enter Drive and avoid accidental entry into Drive as the brake pedal may have been recently used for gaming.
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The low voltage (LV) battery may have become unsupported and not have sufficient energy, or the high voltage (HV) battery state of charge (SOC) is too low, to immediately support drive on sudden request to exit an accessory state (for entertainment and media while parked) and drive the vehicle.
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The vehicle will not enter Drive state for 10 seconds.
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The front vehicle controller (VCFRONT) reports the windshield washer fluid level is low.
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Washer fluid level in the reservoir has just been measured as low, OR the vehicle exits Park while the washer fluid level is measured as low, OR a wash pump is requested while the washer fluid level is measured as low.
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No washer fluid, or insufficient washer fluid, available for use with wipers to clean the windshield.
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The high voltage (HV) battery state of charge (SOC) is not sufficient to complete a low voltage (LV) battery recharge cycle. The LV battery may become completely discharged, and the vehicle electrical system may have inadequate support.
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The LV battery needs to be recharged, but the high voltage battery management system (BMS) reports the HV battery does not have sufficient SOC (enough energy) to charge (support) the LV battery.
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The LV battery may become completely discharged and unrecoverable, requiring replacement. It may be necessary to shed some vehicle electrical loads by cutting power to less essential electronic control units (ECUs), with another alert present to indicate that condition. Vehicle may be unable to drive or continue driving, with another alert present to indicate that condition.
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