MyTeslaMate App

Signal Name	Description	Condition	Impact
PCS_a051_chgIntBusUv	The onboard charger fails to keep the intermediate bus, an internal component involved in AC/DC conversion, at the required voltage. AC charge rate will be reduced, or AC charging may be unavailable.	The onboard charger intermediate bus voltage is below minimum required voltage threshold.	Reduced AC charge rate or inability to AC charge.
PCS_a040_dcdcMaxPowerReached	The Power Conversion System (PCS) electronic control unit (ECU) detects the DCDC converter reaches the maximum output power based on the hardware capability.	The PCS ECU detects the DCDC converter reaches the maximum output power for more than 3 seconds.	The low voltage (LV) battery may not charge properly, and the LV bus may begin loadshedding.
PCS_a034_hvBusOv	PCS DCDC detects pack voltage is higher than the safety threshold to continue its operation	DCDC converter detects that high voltage bus voltage exceeds overvoltage threshold	Inability to precharge HV bus, inability to support 12V system, inability to drive
PCS_a033_hvBusUv	PCS DCDC detects pack voltage is lower than the safety threshold to continue its 12V support operation	DCDC converter detects that high voltage bus voltage is below undervoltage threshold	Inability to precharge HV bus, inability to support 12V system, inability to drive
PCS_a030_canRationality	PCS CAN receiver encounters error while receiveing message	Power conversion system CAN receiver encounters error while receiveing message	Inability to AC charge, inability to precharge HV bus, inability to support 12V system, inability to drive
PCS_a029_chgPowerRationality	Charger is unable to meet BMS's requested power	Charger is unable to meet BMS's requested power within 1kW for more than thirty seconds	Reduced AC charge rate
PCS_a028_chgOutputUv	PCS output under-voltage detected while being commanded to charge	Charger DC output voltage is below minimum output voltage threshold	Inability to AC charge
PCS_a027_chgInsufficientCooling	PCS does not detect coolant flowing	Charger detects that coolant flow is insufficient	Inability to AC charge
PCS_a025_cpu2Malfunction	PCS is not able to boot CPU2 and AC charging functionality is lost	Power conversion system was unable to boot CPU2	Inability to AC charge
PCS_a024_vcfrontMia	PCS does not receive CAN messages from VCFRONT	Charger does not receive all expected CAN messages from front vehicle controller	DCDC converter does not regulate LV bus voltage to target, 12V battery may not charge correctly
PCS_a023_cpMia	PCS does not receive CAN messages from CP	Charger does not receive all expected CAN messages from charge port	Inability to AC charge
PCS_a022_bmsMia	PCS does not receive CAN messages from BMS	Charger does not receive all expected CAN messages from battery management system	Inability to AC charge, inability to precharge HV bus, inability to drive
PCS_a021_hvpMia	PCS does not receive CAN messages from HVP	Charger does not receive all expected CAN messages from high voltage processor	Inability to AC charge, inability to precharge HV bus, inability to drive
PCS_a032_excessiveGridTransientsDetected	The Power Conversion System (PCS) electronic control unit (ECU) detects excessive transients on the electrical grid, causing AC charging to be limited or unavailable.	The PCS ECU detects excessive transients on the electrical grid, causing one or more charger phases to enter an error state.	The rate of AC charging may be reduced, or AC charging may be unavailable.
PCS_a019_acChargePowerLimited	The Power Conversion System (PCS) electronic control unit (ECU) detects the charger power is limited and unable to provide the amount of user-requested power.	The PCS ECU detects the charger is unable to provide the amount of user-requested power for more than 3 seconds.	The rate of AC charging may be limited.
PCS_a017_chgWallPowerRemoval	The onboard charger detects power is removed while charging, making AC charging unavailable.	Charger detects wall power was unexpectedly removed while charging.	Inability to AC charge.
PCS_a015_chg12vUv	Charging is inhibited due to low 12V	Charger detects 12V bus voltage is below 7V for more than 500ms	Inability to AC charge
PCS_a014_chgTempRationality	Charger phase temperature is irrational	Charger phase temperature is outside expected range for more than one second	Reduced AC charge rate or inability to AC charge
PCS_a013_chgPrechargeFailedBoost	Charger failed to precharge the intermediate bus during boost precharge	Boost precharge portion of charger phase startup sequence failed	Reduced AC charge rate or inability to AC charge
PCS_a011_chgLlcCurrentRegulation	Charger is not able to regulate its output current	Charger LLC current regulator error exceeds threshold	Reduced AC charge rate or inability to AC charge

PCS_a051_chgIntBusUv

The onboard charger fails to keep the intermediate bus, an internal component involved in AC/DC conversion, at the required voltage. AC charge rate will be reduced, or AC charging may be unavailable.

The onboard charger intermediate bus voltage is below minimum required voltage threshold.

Reduced AC charge rate or inability to AC charge.

PCS_a040_dcdcMaxPowerReached

The Power Conversion System (PCS) electronic control unit (ECU) detects the DCDC converter reaches the maximum output power based on the hardware capability.

The PCS ECU detects the DCDC converter reaches the maximum output power for more than 3 seconds.

The low voltage (LV) battery may not charge properly, and the LV bus may begin loadshedding.

PCS_a034_hvBusOv

PCS DCDC detects pack voltage is higher than the safety threshold to continue its operation

DCDC converter detects that high voltage bus voltage exceeds overvoltage threshold

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

PCS_a033_hvBusUv

PCS DCDC detects pack voltage is lower than the safety threshold to continue its 12V support operation

DCDC converter detects that high voltage bus voltage is below undervoltage threshold

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

PCS_a030_canRationality

PCS CAN receiver encounters error while receiveing message

Power conversion system CAN receiver encounters error while receiveing message

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

PCS_a029_chgPowerRationality

Charger is unable to meet BMS's requested power

Charger is unable to meet BMS's requested power within 1kW for more than thirty seconds

Reduced AC charge rate

PCS_a028_chgOutputUv

PCS output under-voltage detected while being commanded to charge

Charger DC output voltage is below minimum output voltage threshold

Inability to AC charge

PCS_a027_chgInsufficientCooling

PCS does not detect coolant flowing

Charger detects that coolant flow is insufficient

Inability to AC charge

PCS_a025_cpu2Malfunction

PCS is not able to boot CPU2 and AC charging functionality is lost

Power conversion system was unable to boot CPU2

Inability to AC charge

PCS_a024_vcfrontMia

PCS does not receive CAN messages from VCFRONT

Charger does not receive all expected CAN messages from front vehicle controller

DCDC converter does not regulate LV bus voltage to target, 12V battery may not charge correctly

PCS_a023_cpMia

PCS does not receive CAN messages from CP

Charger does not receive all expected CAN messages from charge port

Inability to AC charge

PCS_a022_bmsMia

PCS does not receive CAN messages from BMS

Charger does not receive all expected CAN messages from battery management system

Inability to AC charge, inability to precharge HV bus, inability to drive

PCS_a021_hvpMia

PCS does not receive CAN messages from HVP

Charger does not receive all expected CAN messages from high voltage processor

Inability to AC charge, inability to precharge HV bus, inability to drive

PCS_a032_excessiveGridTransientsDetected

The Power Conversion System (PCS) electronic control unit (ECU) detects excessive transients on the electrical grid, causing AC charging to be limited or unavailable.

The PCS ECU detects excessive transients on the electrical grid, causing one or more charger phases to enter an error state.

The rate of AC charging may be reduced, or AC charging may be unavailable.

PCS_a019_acChargePowerLimited

The Power Conversion System (PCS) electronic control unit (ECU) detects the charger power is limited and unable to provide the amount of user-requested power.

The PCS ECU detects the charger is unable to provide the amount of user-requested power for more than 3 seconds.

The rate of AC charging may be limited.

PCS_a017_chgWallPowerRemoval

The onboard charger detects power is removed while charging, making AC charging unavailable.

Charger detects wall power was unexpectedly removed while charging.

Inability to AC charge.

PCS_a015_chg12vUv

Charging is inhibited due to low 12V

Charger detects 12V bus voltage is below 7V for more than 500ms

Inability to AC charge

PCS_a014_chgTempRationality

Charger phase temperature is irrational

Charger phase temperature is outside expected range for more than one second

Reduced AC charge rate or inability to AC charge

PCS_a013_chgPrechargeFailedBoost

Charger failed to precharge the intermediate bus during boost precharge

Boost precharge portion of charger phase startup sequence failed

Reduced AC charge rate or inability to AC charge

PCS_a011_chgLlcCurrentRegulation

Charger is not able to regulate its output current

Charger LLC current regulator error exceeds threshold

Reduced AC charge rate or inability to AC charge

Alerts

Alerts