MyTeslaMate App

Signal Name	Description	Condition	Impact
HVLINK_a011_DcLinkBusOpen	Warns if the DCLink bus impedance is too high during precharge.	The precharge Integrated Circuit (IC) sets the prechargeDone hardware line, indicating that the DCLink bus voltage has reached 1100V.	The vehicle will not be able to precharge its contactors.
HVLINK_a010_PrechargeFault	A fault condition has been detected with the Precharge Integrated Circuit (IC).	One of the precharge fault conditions listed in the PrechargeIcFaultDiagnosis becomes true.	The vehicle may not be able to precharge the DCLink bus.
HVLINK_a009_RcmEnsMia	HVLINK is not observing IDLE or ACTIVE pulses from the ENS.	No IDLE or ACTIVE ENS pulses are observed for a prolonged period of time. ENS may be damaged or disconnected	HVLINK will rely on RCM_collisionRear to determine whether a crash event has occurred
HVLINK_a008_DriveInverterHvilOpen	The Drive Inverter (DI) High Voltage Interlock Loop (HVIL) connection is open, breaking High Voltage DC Link Controller (HVLINK) HVIL.	The DI HVIL is reported as open.	DC Link may discharge or fail to energize.
HVLINK_a007_PedalMonitorHvilOpen	The Pedal Monitor (PM) High Voltage Interlock Loop (HVIL) is reported as open.	The PM HVIL is reported as open.	DC Link may discharge or fail to energize.
HVLINK_a006_MvStarcHvilOpen	The Stationary Resonant Converter (STARC) High Voltage Interlock Loop (HVIL) connection is open, breaking High Voltage DC Link Controller (HVLINK) HVIL.	STARC HVIL connection is reported as open.	DC Link may discharge or fail to energize.
HVLINK_a005_PosJbLidSwitchOpen	The positive (left) junction box lid switch is open, breaking High Voltage DC Link Controller (HVLINK) High Voltage Interlock Loop (HVIL).	Positive (left) junction box lid switch reported as open.	DC Link may discharge or fail to energize.
HVLINK_a004_HvInletBlockingHvUp	HV Up is blocked by HVLINK because the DC Link is potentially exposed at the HV Inlet.	HVLINK is not confident that the DC Link is not exposed at the HV Inlet and BMS requests that the DC Link be energized	DC Link may fail to energize
HVBATT_a748_Bp2SocImbalanceWarning	An imbalance in the State of Charge (SOC) of the High Voltage (HV) battery has exceeded the warning threshold.	The estimated imbalance between average SOC and minimum SOC is greater than the alert threshold	Indication that SOC imbalance is increasing. Maximum range and charge will be reduced if imbalance continues to increase.
HVBATT_a747_Bp1SocImbalanceWarning	An imbalance in the State of Charge (SOC) of the High Voltage (HV) battery has exceeded the warning threshold.	The estimated imbalance between average SOC and minimum SOC is greater than the alert threshold	Indication that SOC imbalance is increasing. Maximum range and charge will be reduced if imbalance continues to increase.
HVBATT_a746_Bp2SocImbalance	The battery management system (BMS) detects a possible state of charge (SOC) imbalance.	The BMS detects that the difference between the most-charged brick and the least-charge brick in the high voltage (HV) pack is greater than the acceptable threshold.	Maximum SOC is reduced to 50%.
HVBATT_a745_Bp1SocImbalance	The battery management system (BMS) detects a possible state of charge (SOC) imbalance.	The BMS detects that the difference between the most-charged brick and the least-charge brick in the high voltage (HV) pack is greater than the acceptable threshold.	Maximum SOC is reduced to 50%.
HVBATT_a743_BleedFetFailure	A bleed Field-Effect Transistor (FET) on the Battery Management Board (BMB) is not operating as designed. This will prevent the battery from balancing the brick by decreasing the brick voltage.	Upon a periodic wake, after an ECU reset, or every 6 hours, the Battery Management System (BMS) will test all bleed switches by switching them on in turn. If the sensed brick voltage does not significantly change, this alert is set.	There may be a decrease in available energy to the vehicle, reducing range and LV support.
HVBATT_a742_VshFailure	The battery management system (BMS) has detected a high voltage sense harness (VSH) impedance.	The BMS detects a VSH impedance value above the threshold.	Inability to charge, drive, or support the low voltage (LV) system
HVBATT_a741_Bp2ImpedanceDeviation	High impedance was detected on one or more bricks.	Impedance for one or more bricks exceeds the noise threshold for several measurement counts.	One or more cells in a brick are likely missing, resulting in a high impedance current path. Other potential causes are a high Direct Current Resistance (DCR), intermittent anode laser weld on the given brick(s), or an islanded brick.
HVBATT_a740_Bp1ImpedanceDeviation	High impedance was detected on one or more bricks.	Impedance for one or more bricks exceeds the noise threshold for several measurement counts.	One or more cells in a brick are likely missing, resulting in a high impedance current path. Other potential causes are a high Direct Current Resistance (DCR), intermittent anode laser weld on the given brick(s), or an islanded brick.
HVBATT_a739_Bp2SocChange	A State of Charge (SOC) correction of greater than 3% in Battery Subpack 2 occurred during the previous resting period.	The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.	Significant change in displayed range (range variation) while the vehicle was not used.
HVBATT_a738_Bp1SocChange	A State of Charge (SOC) correction of greater than 3% in Battery Subpack 1 occurred during the previous resting period.	The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.	Significant change in displayed range (range variation) while the vehicle was not used.
HVBATT_a737_Bp2CacImbalanceLimp	Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds acceptable threshold. This results in reduced battery performance and limits maximum range. Vehicle enters Battery Management System (BMS) limp mode.	The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the alert set threshold (CAC imbalance is not within acceptable range)	BMS limp mode is triggered, with another alert present to indicate this condition.
HVBATT_a736_Bp1CacImbalanceLimp	Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds acceptable threshold. This results in reduced battery performance and limits maximum range. Vehicle enters Battery Management System (BMS) limp mode.	The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the alert set threshold (CAC imbalance is not within acceptable range)	BMS limp mode is triggered, with another alert present to indicate this condition.

HVLINK_a011_DcLinkBusOpen

Warns if the DCLink bus impedance is too high during precharge.

The precharge Integrated Circuit (IC) sets the prechargeDone hardware line, indicating that the DCLink bus voltage has reached 1100V.

The vehicle will not be able to precharge its contactors.

HVLINK_a010_PrechargeFault

A fault condition has been detected with the Precharge Integrated Circuit (IC).

One of the precharge fault conditions listed in the PrechargeIcFaultDiagnosis becomes true.

The vehicle may not be able to precharge the DCLink bus.

HVLINK_a009_RcmEnsMia

HVLINK is not observing IDLE or ACTIVE pulses from the ENS.

No IDLE or ACTIVE ENS pulses are observed for a prolonged period of time. ENS may be damaged or disconnected

HVLINK will rely on RCM_collisionRear to determine whether a crash event has occurred

HVLINK_a008_DriveInverterHvilOpen

The Drive Inverter (DI) High Voltage Interlock Loop (HVIL) connection is open, breaking High Voltage DC Link Controller (HVLINK) HVIL.

The DI HVIL is reported as open.

DC Link may discharge or fail to energize.

HVLINK_a007_PedalMonitorHvilOpen

The Pedal Monitor (PM) High Voltage Interlock Loop (HVIL) is reported as open.

The PM HVIL is reported as open.

DC Link may discharge or fail to energize.

HVLINK_a006_MvStarcHvilOpen

The Stationary Resonant Converter (STARC) High Voltage Interlock Loop (HVIL) connection is open, breaking High Voltage DC Link Controller (HVLINK) HVIL.

STARC HVIL connection is reported as open.

DC Link may discharge or fail to energize.

HVLINK_a005_PosJbLidSwitchOpen

The positive (left) junction box lid switch is open, breaking High Voltage DC Link Controller (HVLINK) High Voltage Interlock Loop (HVIL).

Positive (left) junction box lid switch reported as open.

DC Link may discharge or fail to energize.

HVLINK_a004_HvInletBlockingHvUp

HV Up is blocked by HVLINK because the DC Link is potentially exposed at the HV Inlet.

HVLINK is not confident that the DC Link is not exposed at the HV Inlet and BMS requests that the DC Link be energized

DC Link may fail to energize

HVBATT_a748_Bp2SocImbalanceWarning

An imbalance in the State of Charge (SOC) of the High Voltage (HV) battery has exceeded the warning threshold.

The estimated imbalance between average SOC and minimum SOC is greater than the alert threshold

Indication that SOC imbalance is increasing. Maximum range and charge will be reduced if imbalance continues to increase.

HVBATT_a747_Bp1SocImbalanceWarning

An imbalance in the State of Charge (SOC) of the High Voltage (HV) battery has exceeded the warning threshold.

The estimated imbalance between average SOC and minimum SOC is greater than the alert threshold

Indication that SOC imbalance is increasing. Maximum range and charge will be reduced if imbalance continues to increase.

HVBATT_a746_Bp2SocImbalance

The battery management system (BMS) detects a possible state of charge (SOC) imbalance.

The BMS detects that the difference between the most-charged brick and the least-charge brick in the high voltage (HV) pack is greater than the acceptable threshold.

Maximum SOC is reduced to 50%.

HVBATT_a745_Bp1SocImbalance

The battery management system (BMS) detects a possible state of charge (SOC) imbalance.

The BMS detects that the difference between the most-charged brick and the least-charge brick in the high voltage (HV) pack is greater than the acceptable threshold.

Maximum SOC is reduced to 50%.

HVBATT_a743_BleedFetFailure

A bleed Field-Effect Transistor (FET) on the Battery Management Board (BMB) is not operating as designed. This will prevent the battery from balancing the brick by decreasing the brick voltage.

Upon a periodic wake, after an ECU reset, or every 6 hours, the Battery Management System (BMS) will test all bleed switches by switching them on in turn. If the sensed brick voltage does not significantly change, this alert is set.

There may be a decrease in available energy to the vehicle, reducing range and LV support.

HVBATT_a742_VshFailure

The battery management system (BMS) has detected a high voltage sense harness (VSH) impedance.

The BMS detects a VSH impedance value above the threshold.

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

HVBATT_a741_Bp2ImpedanceDeviation

High impedance was detected on one or more bricks.

Impedance for one or more bricks exceeds the noise threshold for several measurement counts.

One or more cells in a brick are likely missing, resulting in a high impedance current path. Other potential causes are a high Direct Current Resistance (DCR), intermittent anode laser weld on the given brick(s), or an islanded brick.

HVBATT_a740_Bp1ImpedanceDeviation

High impedance was detected on one or more bricks.

Impedance for one or more bricks exceeds the noise threshold for several measurement counts.

One or more cells in a brick are likely missing, resulting in a high impedance current path. Other potential causes are a high Direct Current Resistance (DCR), intermittent anode laser weld on the given brick(s), or an islanded brick.

HVBATT_a739_Bp2SocChange

A State of Charge (SOC) correction of greater than 3% in Battery Subpack 2 occurred during the previous resting period.

The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.

Significant change in displayed range (range variation) while the vehicle was not used.

HVBATT_a738_Bp1SocChange

A State of Charge (SOC) correction of greater than 3% in Battery Subpack 1 occurred during the previous resting period.

The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.

Significant change in displayed range (range variation) while the vehicle was not used.

HVBATT_a737_Bp2CacImbalanceLimp

Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds acceptable threshold. This results in reduced battery performance and limits maximum range. Vehicle enters Battery Management System (BMS) limp mode.

The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the alert set threshold (CAC imbalance is not within acceptable range)

BMS limp mode is triggered, with another alert present to indicate this condition.

HVBATT_a736_Bp1CacImbalanceLimp

Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds acceptable threshold. This results in reduced battery performance and limits maximum range. Vehicle enters Battery Management System (BMS) limp mode.

The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the alert set threshold (CAC imbalance is not within acceptable range)

BMS limp mode is triggered, with another alert present to indicate this condition.

Alerts

Alerts