Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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The vehicle controller detects the low voltage (LV) battery voltage is lower than expected during a precharge event. When this occurs too many times, separate alerts will also be present to indicate precharging the high voltage (HV) bus may not succeed and the LV battery may need replacement.
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An instant resistance check of the LV battery connections to the vehicle controller does not succeed (does not return a healthy result). Alert log signal data should provide more information on specifics, including load current, LV battery temperature, and any detected voltage dip.
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The LV battery may be unable to support vehicle electrical systems, including precharging the high voltage (HV) bus.
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No
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The vehicle controller detects the the low voltage (LV) battery may be overdischarged and no longer functional. This may indicate the LV battery has been damaged due to deep discharge, or it may indicate the LV battery voltage has dropped below the minimum limit for maintaining functionality.
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The vehicle controller detects LV battery voltage or LV battery Amp hour (Ah) budget are below their limits for 5 seconds.
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The LV battery may be unable to hold adequate electrical charge to remain functional. Replacement may be necessary, with a separate alert present to indicate that condition if applicable.
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No
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The front vehicle controller (VCFRONT) detects the pump 1 eFuse for the powertrain (PT) pump and condenser fan is open (tripped), interrupting electrical power supply to the PT pump and condenser fan. HVAC cabin cooling (air conditioning) and powertrain performance will be limited.
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A condition detected by the pump 1 eFuse has caused the powertrain pump and condenser fan eFuse circuit to open (trip).
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The PT pump and condenser fan will be unavailable. HVAC cabin cooling (air conditioning) and powertrain performance will be limited.
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No
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The front vehicle controller (VCFRONT) detects the pump 2 eFuse for the HV battery pump and air compressor has tripped (circuit opened), interrupting electrical power supply to the HV battery pump and air compressor. Powertrain performance may be limited.
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A condition detected by the pump 2 eFuse has caused the HV battery pump and air compressor eFuse circuit to open (trip).
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The HV battery pump and air compressor will be unavailable. Powertrain performance may be limited.
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No
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After a single discharge and recharge cycle, the low voltage (LV) battery has been overcharged by more than 5 Amp hours (Ah) compared to initial charge level. If this continues, it may indicate a condition affecting LV battery performance that makes replacement necessary. May also indicate aftermarket device(s) installed on the vehicle, whose current draw interferes with LV battery management.
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Over a single charge cycle, the LV battery has recharged by more than 5Ah compared to the power initially discharged.
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10 independent instances of this alert indicate a chronic overcharge condition that may require LV battery replacement to resolve, and at least one other alert should be present to indicate that condition.
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No
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A condition has been detected that may affect the left and right side markers (amber lights in front fascia, only in applicable regions) and auxiliary park lights (white light pipes in front fascia, all regions).
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The high side driver (HSD) for the left and right side markers and auxiliary park lights reports that an undercurrent or short circuit condition is present.
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The left and right side markers and/or auxiliary park lights may not function as expected.
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No
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The front vehicle controller (VCFRONT) detects a condition affecting the Sleep Bypass Buck Converter circuit, preventing the vehicle from sleeping.
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The output voltage measured by the VCFRONT from the Sleep Bypass Buck Converter is too low to support loads during vehicle sleep.
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The vehicle is unable to sleep and will consume more energy when idle, possibly becoming unresponsive / not waking as expected.
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No
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The front vehicle controller (VCFRONT) detects there is voltage mismatch greater than 0.5V between the input power to the VCFRONT and the left vehicle controller (VCLEFT) 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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Vehicle functions that rely on the VCLEFT may be limited or may not function as expected.
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No
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The front vehicle controller (VCFRONT) detects the Autopilot 1 eFuse has tripped (circuit opened).
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The Autopilot 1 eFuse high side driver (HSD) detects electrical current flow exceeding normal (expected operating) range, causing the Autopilot 1 eFuse circuit to open (trip).
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Autopilot features are unavailable.
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No
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The front vehicle controller (VCFRONT) detects the Autopilot 2 eFuse has tripped (circuit opened).
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The Autopilot 2 eFuse high side driver (HSD) detects electrical current flow exceeding normal (expected operating) range, causing the Autopilot 2 eFuse circuit to open (trip).
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Autopilot features are unavailable.
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No
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The vehicle controller is reporting a short circuit on the low voltage (LV) battery temperature sensor, indicating damage to the sensor or wiring harness.
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The LV battery temperature sensor circuit reads a power rail reference voltage, indicating a short circuit.
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A default voltage setpoint is used when charging the LV battery, instead of optimizing the voltage setpoint based on the LV battery's actual temperature. The LV battery may experience accelerated degradation if this continues.
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No
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The brushless motor has a condition affecting its functionality
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The Battery Pump motor controller detected an error
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The Battery Pump will not be able to run. The integrated circuit will clear the condition when the condition is no longer present
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No
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Powertrain Pump Controller not responding on Local Interconnect Network (LIN)
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Powertrain Pump Controller not responding on Local Interconnect Network (LIN)
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Powertrain Pump Controls will not function
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No
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The front vehicle controller (VCFRONT) has detected a condition affecting the reverse battery charge pump.
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VCFRONT detects a high drop in voltage across protection field effect transistors (FETs) is high or the charge pump voltage is low.
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The DCDC converter may not enable, resulting in no power conversion system (PCS) support for the low voltage (LV) battery and electrical system.
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No
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The front vehicle controller (VCFRONT) detects the battery coolant temperature sensor is reporting an incorrect value.
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There is an irrational difference between the battery coolant temperature sensor value and the battery temperature sensor value.
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Powertrain performance may be limited.
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No
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The vehicle is unable to drive because it has been placed in Showroom Mode, a mode intended for display rather than driving. This should not occur with a production vehicle once it has been delivered. If this occurs due to an error, service is required to exit Showroom Mode.
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An attempt is made to enter drive while the vehicle is in Showroom Mode.
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The vehicle is unable to drive.
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No
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The vehicle controller detects a condition affecting the front left turn indicator.
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May set due to any of the following: (1) electrical condition, such as a short or open circuit; (2) over / under voltage conditions; (3) current driver condition.
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The front left turn indicator may not function as expected. Working turn indicators on the left side of the vehicle will blink at double the speed.
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No
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The vehicle controller detects a condition affecting the front right turn indicator.
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May set due to any of the following: (1) electrical condition, such as a short or open circuit; (2) over / under voltage condition; (3) current driver condition.
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The front right turn indicator may not function as expected. Working turn indicators on the right side of the vehicle will blink at double the speed.
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No
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The vehicle controller is reporting an open circuit on the low voltage (LV) battery temperature sensor, indicating damage to the sensor or wiring harness.
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The LV battery temperature sensor circuit reads a ground reference voltage, indicating an open circuit (disconnected).
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A default voltage setpoint is used when charging the LV battery, instead of optimizing the voltage setpoint based on the LV battery's actual temperature. The LV battery may experience accelerated degradation if this continues.
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No
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The front vehicle controller (VCFRONT) detects the front trunk (also known as the frunk) primary latch is experiencing an overcurrent condition, which may prevent the frunk from opening when commanded.
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The frunk primary latch draws more current than expected.
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The frunk may not open.
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No
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