MyTeslaMate App

Signal Name	Description	Condition	Impact
BMS_w017_SW_Brick_OV	The battery management system (BMS) has detected that a brick is reporting a voltage above the maximum acceptable cell voltage.	A brick reports a voltage above the maximum acceptable cell voltage.	Inability to charge, drive, or support the low voltage (LV) system
BMS_w016_SW_Thermal_Gradient	The battery management system (BMS) detects a temperature imbalance between high voltage (HV) battery modules.	The BMS detects a high temperature difference between the hottest and coldest modules, diverging temperatures while the vehicle is awake, or diverging temperatures while the vehicle is sleeping. Alert log signal data provides the temperatures that triggered the alert.	Inability to charge, drive, or the support low voltage (LV) system
BMS_w015_HW_Sleep_Attempt	The complex programmable logic device (CPLD) detects a condition where it cannot go to sleep but is told to do so. The CPLD cannot go to sleep when pack contactors are closed, the high voltage interlock loop (HVIL) is on, or there is a no-sleep condition.	The CPLD bit HW_Sleep_Attempt is asserted.	This alert is primarily informational and is used for logging purposes.
BMS_w011_HW_Illegal_Ctr_Req	The battery management system (BMS) detects that there are system faults and prevents the pack contactors from closing.	The complex programmable logic device (CPLD) detects a condition that prevents pack contactors from closing. Alert log signal data provides information on the specific condition(s) detected	Inability to charge, drive, or support the low voltage (LV) system
BMS_w010_SW_Neg_Contactor_Drive	There is an issue with the negative contactor drive circuit. This alert may indicate an open pack contactor drive circuit, a falsely closed pack contactor loop, an increase in the pack contactor coil current during economized operation, or that a pack contactor has popped open during operation.	The battery management system (BMS) detects unexpected current through the negative contactor drive circuit.	Inability to charge, drive, or support the low voltage (LV) system
BMS_w009_SW_Pos_Contactor_Drive	There is an issue with the positive contactor drive circuit. This alert may indicate an open contactor drive circuit, a falsely closed contactor loop, an increase in the contactor coil current during economized operation, or that a contactor has popped open during operation.	The battery management system (BMS) detects unexpected current through the positive contactor drive circuit.	Inability to charge, drive, or support the low voltage (LV) system
BMS_w008_HW_HVIL	There is a hardware problem with the high voltage interlock loop (HVIL).	The complex programmable logic device (CPLD) has detected that the HVIL is open and the vehicle is not in Drive.	Inability to charge, drive, or support the low voltage (LV) system
BMS_w007_SW_Module_Alarm_Broken	The battery management system (BMS) has detected that there is an issue with the battery monitor board (BMB) alarm.	The BMS has detected that the BMB alarm is not cycling as expected when the vehicle wakes up.	Inability to charge, drive, or support the low voltage (LV) system
BMS_w006_HW_Ctr_Sfty_Override	The battery management system (BMS) detects unexpected voltage on the contactor service bypass pin.	The BMS detects that the contactor service bypass pin is asserted when it should not be.	Inability to charge, drive, or support the low voltage (LV) system
BMS_w003_HW_Module_Alarm	The battery management system (BMS) has detected that one or more of the battery modules has reported an alert. This alert may be set falsely at extremely low LV battery voltages.	The BMS detects that one or more of the battery modules is reporting an alert.	Inability to charge, drive, or support the low voltage (LV) system
BMS_w002_HW_Over_Voltage	The battery management system (BMS) has detected that the pack voltage is too high.	The BMS detects that pack voltage is above the acceptable threshold.	Inability to charge, drive, or support the low voltage (LV) system
BMS_w001_HW_Over_Current	The battery management system (BMS) has detected that the high voltage (HV) battery pack current exceeds the hardware overcurrent threshold.	The BMS detects that the pack current exceeds the hardware overcurrent threshold.	Inability to charge, drive, or support the low voltage (LV) system
BMS_u031_ReplaceSmartFuseSoon	The Battery Management System (BMS) has detected the HV battery pyro fuse is less than 6 months from end of life. The fuse must be replaced with a new self-powered hybrid pyro fuse.	Pyro fuse is less than 6 months from end of life.	Pyro fuse is no longer functional
BMS_u030_UnsupportedAdapter	The battery management system (BMS) has detected an unsupported charging adapter.	The BMS detects an unsupported charging adapter.	Charging will not begin with the unsupported adapter.
BMS_u029_dSoc_Limiting	There is condition internal to the high voltage (HV) battery requiring the battery management system (BMS) to limit the maximum allowed brick voltage.	BMS_w117_SW_Delta_SOC_Weak_Short is set and MCU_dSocAlertEnable=1 and BMS_a117_silentLimiting=1.	The target max brick voltage for charge is limited to the voltage corresponding to 50% state of charge (SOC).
BMS_u028_ChademoAdapterOverTemp	CHAdeMO adapter reported vehicle connector temperature that is too hot; charging was terminated.	CA_vehConnTempDegC signal received from Chademo Adapter exceeds the threshold	CHAdeMO charging is terminated
BMS_u027_ChademoAdapterFoldback	The CHAdeMO charge handle adapter has reported that the adapter temperature has exceeded the threshold at which the vehicle should begin folding back charge current.	The CHAdeMO charge handle adapter temperature exceeds the threshold at which the vehicle should start to fold back charge current.	DC charge power reduced.
BMS_u026_Capacity_Imbalance	The battery management system (BMS) has detected a capacity imbalance within a module has exceeded the maximum threshold.	The BMS detects a capacity imbalance within a module has exceeded the maximum threshold.	This alert is primarily informational.
BMS_u025_Brick_Voltage_Limit	The battery management system (BMS) has decreased the maximum allowed brick voltage from its original value.	The BMS detects that the cells have accumulated wear that exceeds the threshold to limit the maximum brick voltage.	This alert is primarily informational.
BMS_u024_Not_Uncorked_Capable	The battery management system (BMS) has detected that the high voltage (HV) battery current sensor does not support uncorked performance configuration.	The BMS detects that the HV battery current sensor does not support the uncorked performance configuration.	This alert is primarily informational.

BMS_w017_SW_Brick_OV

The battery management system (BMS) has detected that a brick is reporting a voltage above the maximum acceptable cell voltage.

A brick reports a voltage above the maximum acceptable cell voltage.

Inability to charge, drive, or support the low voltage (LV) system

BMS_w016_SW_Thermal_Gradient

The battery management system (BMS) detects a temperature imbalance between high voltage (HV) battery modules.

The BMS detects a high temperature difference between the hottest and coldest modules, diverging temperatures while the vehicle is awake, or diverging temperatures while the vehicle is sleeping. Alert log signal data provides the temperatures that triggered the alert.

Inability to charge, drive, or the support low voltage (LV) system

BMS_w015_HW_Sleep_Attempt

The complex programmable logic device (CPLD) detects a condition where it cannot go to sleep but is told to do so. The CPLD cannot go to sleep when pack contactors are closed, the high voltage interlock loop (HVIL) is on, or there is a no-sleep condition.

The CPLD bit HW_Sleep_Attempt is asserted.

This alert is primarily informational and is used for logging purposes.

BMS_w011_HW_Illegal_Ctr_Req

The battery management system (BMS) detects that there are system faults and prevents the pack contactors from closing.

The complex programmable logic device (CPLD) detects a condition that prevents pack contactors from closing. Alert log signal data provides information on the specific condition(s) detected

Inability to charge, drive, or support the low voltage (LV) system

BMS_w010_SW_Neg_Contactor_Drive

There is an issue with the negative contactor drive circuit. This alert may indicate an open pack contactor drive circuit, a falsely closed pack contactor loop, an increase in the pack contactor coil current during economized operation, or that a pack contactor has popped open during operation.

The battery management system (BMS) detects unexpected current through the negative contactor drive circuit.

Inability to charge, drive, or support the low voltage (LV) system

BMS_w009_SW_Pos_Contactor_Drive

There is an issue with the positive contactor drive circuit. This alert may indicate an open contactor drive circuit, a falsely closed contactor loop, an increase in the contactor coil current during economized operation, or that a contactor has popped open during operation.

The battery management system (BMS) detects unexpected current through the positive contactor drive circuit.

Inability to charge, drive, or support the low voltage (LV) system

BMS_w008_HW_HVIL

There is a hardware problem with the high voltage interlock loop (HVIL).

The complex programmable logic device (CPLD) has detected that the HVIL is open and the vehicle is not in Drive.

Inability to charge, drive, or support the low voltage (LV) system

BMS_w007_SW_Module_Alarm_Broken

The battery management system (BMS) has detected that there is an issue with the battery monitor board (BMB) alarm.

The BMS has detected that the BMB alarm is not cycling as expected when the vehicle wakes up.

Inability to charge, drive, or support the low voltage (LV) system

BMS_w006_HW_Ctr_Sfty_Override

The battery management system (BMS) detects unexpected voltage on the contactor service bypass pin.

The BMS detects that the contactor service bypass pin is asserted when it should not be.

Inability to charge, drive, or support the low voltage (LV) system

BMS_w003_HW_Module_Alarm

The battery management system (BMS) has detected that one or more of the battery modules has reported an alert. This alert may be set falsely at extremely low LV battery voltages.

The BMS detects that one or more of the battery modules is reporting an alert.

Inability to charge, drive, or support the low voltage (LV) system

BMS_w002_HW_Over_Voltage

The battery management system (BMS) has detected that the pack voltage is too high.

The BMS detects that pack voltage is above the acceptable threshold.

Inability to charge, drive, or support the low voltage (LV) system

BMS_w001_HW_Over_Current

The battery management system (BMS) has detected that the high voltage (HV) battery pack current exceeds the hardware overcurrent threshold.

The BMS detects that the pack current exceeds the hardware overcurrent threshold.

Inability to charge, drive, or support the low voltage (LV) system

BMS_u031_ReplaceSmartFuseSoon

The Battery Management System (BMS) has detected the HV battery pyro fuse is less than 6 months from end of life. The fuse must be replaced with a new self-powered hybrid pyro fuse.

Pyro fuse is less than 6 months from end of life.

Pyro fuse is no longer functional

BMS_u030_UnsupportedAdapter

The battery management system (BMS) has detected an unsupported charging adapter.

The BMS detects an unsupported charging adapter.

Charging will not begin with the unsupported adapter.

BMS_u029_dSoc_Limiting

There is condition internal to the high voltage (HV) battery requiring the battery management system (BMS) to limit the maximum allowed brick voltage.

BMS_w117_SW_Delta_SOC_Weak_Short is set and MCU_dSocAlertEnable=1 and BMS_a117_silentLimiting=1.

The target max brick voltage for charge is limited to the voltage corresponding to 50% state of charge (SOC).

BMS_u028_ChademoAdapterOverTemp

CHAdeMO adapter reported vehicle connector temperature that is too hot; charging was terminated.

CA_vehConnTempDegC signal received from Chademo Adapter exceeds the threshold

CHAdeMO charging is terminated

BMS_u027_ChademoAdapterFoldback

The CHAdeMO charge handle adapter has reported that the adapter temperature has exceeded the threshold at which the vehicle should begin folding back charge current.

The CHAdeMO charge handle adapter temperature exceeds the threshold at which the vehicle should start to fold back charge current.

DC charge power reduced.

BMS_u026_Capacity_Imbalance

The battery management system (BMS) has detected a capacity imbalance within a module has exceeded the maximum threshold.

The BMS detects a capacity imbalance within a module has exceeded the maximum threshold.

This alert is primarily informational.

BMS_u025_Brick_Voltage_Limit

The battery management system (BMS) has decreased the maximum allowed brick voltage from its original value.

The BMS detects that the cells have accumulated wear that exceeds the threshold to limit the maximum brick voltage.

This alert is primarily informational.

BMS_u024_Not_Uncorked_Capable

The battery management system (BMS) has detected that the high voltage (HV) battery current sensor does not support uncorked performance configuration.

The BMS detects that the HV battery current sensor does not support the uncorked performance configuration.

This alert is primarily informational.

Alerts

Alerts