MyTeslaMate App

Signal Name	Description	Condition	Impact
PCS_a089_hvBusDischargeIrrational	The Power Conversion System (PCS) electronic control unit (ECU) detects its DCDC converter is unable to regulate the voltage slew rate while the high voltage (HV) bus is discharging, causing the HV bus to discharge outside of the specified slew rate threshold.	The PCS ECU detects the DCDC converter is unable to regulate the voltage slew rate while the HV bus is discharging.	Vehicle will be unable to precharge. Guobiao direct current (GB DC) and CHAdeMO DC fast charging (FC) may not start or may be interrupted due to CHAdeMO and GB DC compatibility conditions.
PCS_a088_gridFreqDroopDetected	The Power Conversion System (PCS) electronic control unit (ECU) detects the electrical grid frequency droops below its nominal level, indicating the grid may be experiencing heavy loads.	The PCS ECU detects the electrical grid frequency droops below its nominal level.	AC charging power will be temporarily limited depending on the droop level to reduce the load on the electrical grid.
PCS_a086_dcdcInsufficientCooling	DCDC does not have enough cooling, DCDC system may limit its output power.	DCDC converter detects difference in ambient temperature vs. DCDC converter temperature exceeding threshold, indicating that cooling may not be sufficient	No impact
PCS_a085_dcdcFetsNotSwitching	The Power Conversion System (PCS) electronic control unit (ECU) detects the DCDC tank current period is too long, indicating the DCDC metal-oxide-semiconductor field-effect transistor (MOSFETs) are not switching properly.	The PCS ECU detects the DCDC MOSFETs are not switching properly.	Vehicle is unable to drive, charge, or support the low voltage (LV) battery / electrical system until the DCDC MOSFETs switch properly.
PCS_a082_dcdcPchgUnsafeDiVoltage	HV bus voltage unsafe for drive inverter while PCS DCDC is attempting to precharge HV bus.	DCDC converter detected high voltage bus voltage profile anomoly during precharge	Inability to precharge HV bus, inability to support 12V system, inability to drive
PEPS_a123_motorUnitFaulted	A condition has been detected which prevents steering motor operation. Alert log signal data should provide more information on specific condition(s) involved.	Motor control inputs exceed acceptable bounds.	The motor is disqualified and system health is degraded.
PCS_a081_dcdcPchgTimeout	PCS DCDC timed out attempting to precharge HV bus.	DCDC converter timed out when attempting to precharge HV bus	Inability to precharge HV bus, inability to support 12V system, inability to drive
PCS_a080_damagedPhaseDetected	PCS has detected at least one damaged AC charging phase, AC charging power will be limited.	Power conversion system detected reset while enabling a phase, and did not attempt to re-enable phase	Reduced AC charge rate or inability to AC charge
PCS_a079_eepromOperationError	PCS EEPROM software module has detected an error.	Power conversion system EEPROM software module has detected an error	Kilowatt-hour counter functionality may be impacted, damaged phase detection may be impacted
PCS_a078_chgStopDcdcTooHot	AC charging is stopped because DCDC is too hot.	DCDC converter temperature exceeds threshold for more than five seconds while AC charging is active	Inability to AC charge
PEPS_a219_steeringDeratedByJumpPost	Steering power is reduced as the vehicle has entered Drive power state while being powered by the jump post.	The vehicle enters Drive state while being powered by the jump post.	Steering performance may be reduced until the vehicle exits then re-enters Drive state (vehicle power cycle occurs) with the jump post power source disconnected.
PCS_a077_microGridWobbleDetected	The Power Conversion System (PCS) electronic control unit (ECU) detects a wobble signature from the Tesla Powerwall.	The PCS ECU detects a wobble signature from the Tesla Powerwall.	No expected impact on vehicle functionality.
PEPS_a124_VCLEFT2_MIA	One or more of the messages the vehicle controller receives periodically from the left vehicle controller (VCLEFT2) is not received, indicating the VCLEFT1 may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCLEFT2 within the expected time frame.	Vehicle functions that depend on the VCLEFT2 may be unavailable or may not function as expected.
PEPS_a252_steeringDegradedByVehicle	Steering system performance degraded due to condition detected affecting functionality.	Any condition detected affecting steering system functionality.	Steering system performance is degraded, and vehicle speed is limited.
PEPS_a251_lateralControlFailed	Steering system unable to follow commands due to one or more conditions affecting functionality.	Any condition affecting steering system functionality that will prevent operation / make the steering system unable to follow commands.	Vehicle is unable to drive or continue driving.
PEPS_a125_EGGRIGHT1_MIA	One or more of the expected CAN messages from the Etherloop Generalized Gateway Right (Core 1) were not received, indicating the EGGRIGHT1 ECU may be unavailable (MIA).	The local ECU does not receive one or more of the expected messages from the EGGRIGHT1 within the expected time frame.	Vehicle functions that depend on the EGGRIGHT1 may be unavailable or may not function as expected.
PEPS_a127_EGGREAR1_MIA	One or more of the expected CAN messages from the Etherloop Generalized Gateway Rear (Core 1) were not received, indicating the EGGREAR1 ECU may be unavailable (MIA).	The local ECU does not receive one or more of the expected messages from the EGGREAR1 within the expected time frame.	Vehicle functions that depend on the EGGREAR1 may be unavailable or may not function as expected.
PEPS_a128_VCREAR_MIA	One or more of the messages the vehicle controller receives periodically from the rear vehicle controller (VCREAR) is not received, indicating the VCREAR may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCREAR within the expected time frame.	Vehicle functions that depend on the VCREAR may be unavailable or may not function as expected.
PEPS_a130_gatedriverFault	The gate driver reported an electrical condition preventing operation.	The gate driver is reporting an electrical condition affecting its functionality.	The motor is disqualified and system health is degraded.
PEPS_a138_currentCalibrationFailed	Steering current calibration is unsuccessful.	Motor phase or bus current calibration offset is out of the nominal range.	The motor is disqualified and system health is degraded.

PCS_a089_hvBusDischargeIrrational

The Power Conversion System (PCS) electronic control unit (ECU) detects its DCDC converter is unable to regulate the voltage slew rate while the high voltage (HV) bus is discharging, causing the HV bus to discharge outside of the specified slew rate threshold.

The PCS ECU detects the DCDC converter is unable to regulate the voltage slew rate while the HV bus is discharging.

Vehicle will be unable to precharge. Guobiao direct current (GB DC) and CHAdeMO DC fast charging (FC) may not start or may be interrupted due to CHAdeMO and GB DC compatibility conditions.

PCS_a088_gridFreqDroopDetected

The Power Conversion System (PCS) electronic control unit (ECU) detects the electrical grid frequency droops below its nominal level, indicating the grid may be experiencing heavy loads.

The PCS ECU detects the electrical grid frequency droops below its nominal level.

AC charging power will be temporarily limited depending on the droop level to reduce the load on the electrical grid.

PCS_a086_dcdcInsufficientCooling

DCDC does not have enough cooling, DCDC system may limit its output power.

DCDC converter detects difference in ambient temperature vs. DCDC converter temperature exceeding threshold, indicating that cooling may not be sufficient

No impact

PCS_a085_dcdcFetsNotSwitching

The Power Conversion System (PCS) electronic control unit (ECU) detects the DCDC tank current period is too long, indicating the DCDC metal-oxide-semiconductor field-effect transistor (MOSFETs) are not switching properly.

The PCS ECU detects the DCDC MOSFETs are not switching properly.

Vehicle is unable to drive, charge, or support the low voltage (LV) battery / electrical system until the DCDC MOSFETs switch properly.

PCS_a082_dcdcPchgUnsafeDiVoltage

HV bus voltage unsafe for drive inverter while PCS DCDC is attempting to precharge HV bus.

DCDC converter detected high voltage bus voltage profile anomoly during precharge

Inability to precharge HV bus, inability to support 12V system, inability to drive

PEPS_a123_motorUnitFaulted

A condition has been detected which prevents steering motor operation. Alert log signal data should provide more information on specific condition(s) involved.

Motor control inputs exceed acceptable bounds.

The motor is disqualified and system health is degraded.

PCS_a081_dcdcPchgTimeout

PCS DCDC timed out attempting to precharge HV bus.

DCDC converter timed out when attempting to precharge HV bus

Inability to precharge HV bus, inability to support 12V system, inability to drive

PCS_a080_damagedPhaseDetected

PCS has detected at least one damaged AC charging phase, AC charging power will be limited.

Power conversion system detected reset while enabling a phase, and did not attempt to re-enable phase

Reduced AC charge rate or inability to AC charge

PCS_a079_eepromOperationError

PCS EEPROM software module has detected an error.

Power conversion system EEPROM software module has detected an error

Kilowatt-hour counter functionality may be impacted, damaged phase detection may be impacted

PCS_a078_chgStopDcdcTooHot

AC charging is stopped because DCDC is too hot.

DCDC converter temperature exceeds threshold for more than five seconds while AC charging is active

Inability to AC charge

PEPS_a219_steeringDeratedByJumpPost

Steering power is reduced as the vehicle has entered Drive power state while being powered by the jump post.

The vehicle enters Drive state while being powered by the jump post.

Steering performance may be reduced until the vehicle exits then re-enters Drive state (vehicle power cycle occurs) with the jump post power source disconnected.

PCS_a077_microGridWobbleDetected

The Power Conversion System (PCS) electronic control unit (ECU) detects a wobble signature from the Tesla Powerwall.

The PCS ECU detects a wobble signature from the Tesla Powerwall.

No expected impact on vehicle functionality.

PEPS_a124_VCLEFT2_MIA

One or more of the messages the vehicle controller receives periodically from the left vehicle controller (VCLEFT2) is not received, indicating the VCLEFT1 may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the VCLEFT2 within the expected time frame.

Vehicle functions that depend on the VCLEFT2 may be unavailable or may not function as expected.

PEPS_a252_steeringDegradedByVehicle

Steering system performance degraded due to condition detected affecting functionality.

Any condition detected affecting steering system functionality.

Steering system performance is degraded, and vehicle speed is limited.

PEPS_a251_lateralControlFailed

Steering system unable to follow commands due to one or more conditions affecting functionality.

Any condition affecting steering system functionality that will prevent operation / make the steering system unable to follow commands.

Vehicle is unable to drive or continue driving.

PEPS_a125_EGGRIGHT1_MIA

One or more of the expected CAN messages from the Etherloop Generalized Gateway Right (Core 1) were not received, indicating the EGGRIGHT1 ECU may be unavailable (MIA).

The local ECU does not receive one or more of the expected messages from the EGGRIGHT1 within the expected time frame.

Vehicle functions that depend on the EGGRIGHT1 may be unavailable or may not function as expected.

PEPS_a127_EGGREAR1_MIA

One or more of the expected CAN messages from the Etherloop Generalized Gateway Rear (Core 1) were not received, indicating the EGGREAR1 ECU may be unavailable (MIA).

The local ECU does not receive one or more of the expected messages from the EGGREAR1 within the expected time frame.

Vehicle functions that depend on the EGGREAR1 may be unavailable or may not function as expected.

PEPS_a128_VCREAR_MIA

One or more of the messages the vehicle controller receives periodically from the rear vehicle controller (VCREAR) is not received, indicating the VCREAR may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the VCREAR within the expected time frame.

Vehicle functions that depend on the VCREAR may be unavailable or may not function as expected.

PEPS_a130_gatedriverFault

The gate driver reported an electrical condition preventing operation.

The gate driver is reporting an electrical condition affecting its functionality.

The motor is disqualified and system health is degraded.

PEPS_a138_currentCalibrationFailed

Steering current calibration is unsuccessful.

Motor phase or bus current calibration offset is out of the nominal range.

The motor is disqualified and system health is degraded.

Alerts

Alerts