Alerts
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| Signal Name | Description | Condition | Impact |
|---|---|---|---|
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A large voltage drop is detected in the input power to the vehicle controller, indicating the resistance on the input power feed to the vehicle controller is higher than expected.
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Estimated resistance on the input power feed to the vehicle controller is higher than expected.
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The vehicle controller may be unavailable due to lack of adequate input power, limiting vehicle functionality or making the vehicle inoperable, with at least one other alert specific to that condition present.
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One or more of the expected controller area network (CAN) messages from the Autopilot Primary (APP) were not received.
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A message the local ECU expects to receive from the APP ECU is not received within the expected timeout, or the drop rate is too high while the APP is CAN active.
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Autopilot does not operate as expected.
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An issue is indicated from the non-volatile memory manager.
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Non-volatile memory misconfiguration or underlying flash/filesystem error.
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Non-volatile memory records may be incorrect or missing.
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The onboard charger detects an abnormal wiring of phase L2 and L3 while charging on a three-phase delta grid.
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In the three-phase delta grid, onboard charger's L3 conductor is energized while L2 is not energized.
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Reduced AC charging rate.
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PCS detects it is misconfigured, please refer to the alert toolbox article to decode the miss configuration condition and fix them accordingly.
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PCS detects there are misconfigurations.
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DCDC and/or AC charging may not function properly
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PCS does not receive the PCS <-> VC DCDC interface CAN messages from.
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Charger does not receive all expected DCDC interface CAN messages from vehicle controller
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DCDC converter does not regulate LV bus voltage to target, LV battery may not charge correctly
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PCS bootloader configured the clock source to use the internal clock (INTOSC2), because the DSP has reported a missing clock from the external crystal oscillator.
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On boot, PCS is not using the external crystal oscillator (XTALOSC)
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Internal oscillator is less precise, potentially has system behavior impact
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More than half of the Electronic Control Units (ECUs) on either the Left CAN (LC) or Right CAN (RC) bus are missing more than half their messages while the bus should be active.
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If 50% or more of the ECUs the local ECUs listens to are MIA, and the local ECU receives from more than 3 ECUs on this bus. An ECU is MIA if more than 50% of its messages are MIA and that ECU is considered CAN active (see specific ECU's MIA alert for CAN active conditions).
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Vehicle functionality may not operate as expected.
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The Power Conversion System (PCS) electronic control unit (ECU) unexpectedly experiences a reset or power cycle while performing DCDC operations.
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During initialization, the PCS ECU detects the High Voltage Processor (HVP) is already sending a control request for low voltage (LV) support, indicating the PCS likely experienced a reset or power cycle unexpectedly while performing DCDC operations.
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No expected impact on vehicle functionality.
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The Power Conversion System (PCS) electronic control unit (ECU) detects the viper chip is experiencing a condition affecting AC charging functionality.
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The PCS ECU detects a viper chip condition preventing the charger phase from boosting the intermediate bus to the specified threshold.
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No expected impact on vehicle functionality.
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PCS has detected at least one reset during the boot up process. AC charging power might be limited if phase damaged is detected.
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Power conversion system detected reset while enabling a phase
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Reduced AC charge rate or inability to AC charge if pahse damaged is detected
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One or more of the messages the vehicle controller receives periodically from the drive interface (DI) electronic control unit (ECU) is not received while the vehicle is in Drive, indicating the DI ECU may be unavailable (MIA).
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One or more of the expected messages from the DI ECU is not received while the vehicle is in Drive.
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Vehicle speed and power may be limited.
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Steering system performance degraded due to condition detected affecting functionality.
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Any condition detected affecting steering system functionality.
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Steering system performance is degraded, and vehicle speed is limited.
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The Power Conversion System (PCS) electronic control unit (ECU) detects the micro grid frequency significantly droops below the expected operating threshold, indicating the micro grid is overloaded.
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The PCS ECU detects the micro grid frequency significantly droops below the specified threshold.
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AC charging will be unavailable to help reduce the load on the micro grid.
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PCS enables the DCDC control to run under sensorless mode, possibly due to some malfunction hardware.
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When 5V logic power rail is irrational and DCDC experienced faults when using it is original control scheme
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DCDC running under sensorless control mode and some DCDC hardware protection may be affected
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Power conversion system DCDC malfunction detected, PCS service is required.
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When 5V logic power rail exceeds 5.8V continuously for more than 1 minute
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Car unable to start or drive, LV battery and system cannot be supported, AC charging functionality may also be affected
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PCS detects one of its logical power rail's measurement becomes irrational.
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Power conversion system detects that a logical power rail voltage is outside expected range for more than one second
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Inability to precharge HV bus, inability to support 12V system, inability to AC charge, inability to drive
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The Power Conversion System (PCS) electronic control unit (ECU) detects the charging power is limited due to excessive intermediate bus voltage ripples, which may be caused by electrolytic capacitor degradation.
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The PCS ECU detects charging power is limited for more than 10 minutes due to excessive intermediate bus voltage ripples. Alert log signal data should provide more information on the specific condition(s) detected.
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The rate of AC charging may be limited by the PCS.
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The Power Conversion System (PCS) electronic control unit (ECU) detects irrational intermediate bus voltage behavior.
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The PCS ECU detects the intermediate bus voltage ripple peak-to-peak value for the charger phase exceeds the specified threshold.
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The rate of AC charging may be reduced, or AC charging may be unavailable.
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PCS detects one or more power converter expected AC voltage sources are missing, possibly due to bad utility wiring or vehicle HV harness connection.
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Charger detects that one or more expected AC voltage sources is missing, possibly due to bad external wiring
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Reduced AC charge rate or inability to AC charge
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