MyTeslaMate App

Signal Name	Description	Condition	Impact
VCLEFT_a206_maxChrgeSssionTmeout	The low voltage (LV) battery charge cycle was stopped before it reached either its Amp hour or current targets, as the maximum time period for a charging session timeout had been reached.	The vehicle controller detects the maximum LV battery charging session timeout is reached.	Increased energy drain when the vehicle is idle, which may cause lower than expected vehicle state of charge (SOC). LV battery may have lower charge than expected.
VCLEFT_a207_epbmEnableWrong	Electronic Parking Brake Monitor detected its motor enable line set high when it should not be.	Electronic Parking Brake Monitor motor enable line is set high even though it should not be given Electronic Parking Brake Monitor's current state.	EPB may not operate.
VCLEFT_a229_noDriveChgCableCon	Drive has been requested while a charge cable is connected to the vehicle. The vehicle cannot enter drive until the charge cable has been disconnected.	Drive request while a charge cable is connected to the vehicle.	Vehicle will not drive until the charge cable is disconnected.
VCLEFT_a213_LVOvercharge	Over multiple discharge and recharge cycles, the low voltage (LV) battery has been overcharged by more than 5 Amp hours (Ah) compared to initial charge level. Indicates a condition affecting LV battery performance that makes replacement necessary (another alert specific to replacement should be present). May also indicate aftermarket device(s) installed on the vehicle, whose current draw interferes with LV battery management.	Over multiple charge cycles, the LV battery has recharged by more than 5Ah compared to the energy initially discharged.	The LV battery may enter thermal runaway if the chronic overcharge condition is not resolved. The LV battery requires replacement, with a separate alert present to directly indicate that condition.
VCLEFT_a201_prechargeFailed	The Left Vehicle Controller (VCLEFT) precharge circuit did not raise the voltage to the target voltage in the expected amount of time.	The load voltage does not meet the power source voltage in the expected amount of time.	The load being precharged may not turn on. Vehicle functions relying on the load being precharged may not operate as expected.
VCLEFT_a202_epbmUnderIStatic	Electronic Parking Brake Monitor measured less current than is required for Electronic Parking Brake to transition to PARK.	Electronic Parking Brake attempted to transition to PARK while Electronic Parking Brake Monitor had yet to measure the minumum current required to allow the transition.	The caliper may not have the expected holding force.
VCLEFT_a200_PmUnparkNotAllowed	DI requested unpark but PM didn't allow it.	DI requests unpark and PM doesn't allow it within 40ms or is MIA	Fault or error occurred on the DI
VCLEFT_a199_discnctdLVBattery	The low voltage (LV) battery is disconnected.	No current flow detected to / from the low voltage (LV) battery for an extended time period.	Loss of support from the low voltage (LV) battery, so the vehicle electrical system is only supported via the power conversion system (PCS). Lead acid only: Some vehicle features may be unavailable due to load shedding. There should be another alert present to indicate this.
VCLEFT_a202_remoteEpbConfigIncompatible	EPB's brake HW config is not compatible remote EPB's brake HW config.	Remote EPB is present and local EPB has learnt brake HW config but is not compatible with remote brake HW config	Remote and local EPB brake HW config is incompatible, parking brake function may be degraded
VCLEFT_a203_hwBrakeTypeMismatch	Electronic Parking Brake's learned configuration does not match the reported config from the gateway.	Electronic Parking Brake HW type does not match HW type reported by gateway and 5 seconds have passed since gateway booted up	Hardware does not match current configuration, parking brake function may be degraded
VCLEFT_a197_freeRollModeAtSpeed	If vehicle reaches 8.8kph, EPB will park.	Vehicle speed of 8.8kph in free roll Mode	EPB is applied.
VCLEFT_a221_hardwareLoadshedTriggered	Hardware loadshed protection is initiated on the Vehicle Controller Left (VCLEFT). Non-critical loads are expected to be unavailable until the protection clears.	The 16V bus reports an undervoltage or overcurrent condition on VCLEFT while the vehicle is in Drive.	Non-critical loads unavailable in Drive.
VCLEFT_a203_epbmOverIStatic	Electronic Parking Brake Monitor measured more current than is required for Electronic Parking Brake to remain in PARKING.	Electronic Parking Brake attempted to remain in PARKING while Electronic Parking Brake Monitor had measured more than the maximum current allowed to remain in PARKING.	Caliper lifetime may be degraded.
VCLEFT_a196_freeRollModeActive	will prevent EPB from parking when the driver leaves.	EPB enters Free Roll Mode from UI request	Car will be free rolling
VCLEFT_a197_VEHCANUndertrminate	the adjustable termination is off when it should be on.	CAN bus termination not set when expected	Vehicle CAN bus may have errors
VCLEFT_a193_radFanMIA	Radiator Fan Controller not responding on LIN.	Radiator Fan Controller not responding on LIN	Radiator Fan Controls will not function
VCLEFT_a194_DCDCNotSupportingLVBus	The low voltage (LV) bus and LV battery are not adequately supported by the power conversion system (PCS).	There is 0.5V or greater difference between the PCS voltage and the LV battery voltage.	The low voltage electrical system cannot continue to power all vehicle features when the LV bus is not adequately supported. It may be necessary to shed some vehicle electrical loads by cutting power to less essential electronic control units (ECUs), and another alert will be present to indicate that condition. Vehicle may be unable to drive or continue driving, with another alert present to indicate that condition.
VCLEFT_a195_parkForDriverIsLeaving	The Electronic Parking Brake (EPB) reports the driver is leaving and parks the vehicle.	The EPB attempted to park due to the driver being detected as leaving.	The EPB will be applied.
VCLEFT_a196_VEHCANOverterminate	the adjustable termination is active when it should be off.	CAN bus termination set when unexpected	Vehicle CAN bus may have errors
VCLEFT_a204_epbmUnderIDyn	The Electronic Parking Brake Monitor (EPBM) measured less current than is required for the Electronic Parking Brake (EPB) to transition to DYNAMIC, which may lead to the brake caliper not having the expected amount of braking force.	The Electronic Parking Brake (EPB) attempted to transition to DYNAMIC before the Electronic Parking Brake Monitor (EPBM) measured the minimum current required to allow the transition.	The brake caliper may not have the expected braking force.

VCLEFT_a206_maxChrgeSssionTmeout

The low voltage (LV) battery charge cycle was stopped before it reached either its Amp hour or current targets, as the maximum time period for a charging session timeout had been reached.

The vehicle controller detects the maximum LV battery charging session timeout is reached.

Increased energy drain when the vehicle is idle, which may cause lower than expected vehicle state of charge (SOC). LV battery may have lower charge than expected.

VCLEFT_a207_epbmEnableWrong

Electronic Parking Brake Monitor detected its motor enable line set high when it should not be.

Electronic Parking Brake Monitor motor enable line is set high even though it should not be given Electronic Parking Brake Monitor's current state.

EPB may not operate.

VCLEFT_a229_noDriveChgCableCon

Drive has been requested while a charge cable is connected to the vehicle. The vehicle cannot enter drive until the charge cable has been disconnected.

Drive request while a charge cable is connected to the vehicle.

Vehicle will not drive until the charge cable is disconnected.

VCLEFT_a213_LVOvercharge

Over multiple discharge and recharge cycles, the low voltage (LV) battery has been overcharged by more than 5 Amp hours (Ah) compared to initial charge level. Indicates a condition affecting LV battery performance that makes replacement necessary (another alert specific to replacement should be present). May also indicate aftermarket device(s) installed on the vehicle, whose current draw interferes with LV battery management.

Over multiple charge cycles, the LV battery has recharged by more than 5Ah compared to the energy initially discharged.

The LV battery may enter thermal runaway if the chronic overcharge condition is not resolved. The LV battery requires replacement, with a separate alert present to directly indicate that condition.

VCLEFT_a201_prechargeFailed

The Left Vehicle Controller (VCLEFT) precharge circuit did not raise the voltage to the target voltage in the expected amount of time.

The load voltage does not meet the power source voltage in the expected amount of time.

The load being precharged may not turn on. Vehicle functions relying on the load being precharged may not operate as expected.

VCLEFT_a202_epbmUnderIStatic

Electronic Parking Brake Monitor measured less current than is required for Electronic Parking Brake to transition to PARK.

Electronic Parking Brake attempted to transition to PARK while Electronic Parking Brake Monitor had yet to measure the minumum current required to allow the transition.

The caliper may not have the expected holding force.

VCLEFT_a200_PmUnparkNotAllowed

DI requested unpark but PM didn't allow it.

DI requests unpark and PM doesn't allow it within 40ms or is MIA

Fault or error occurred on the DI

VCLEFT_a199_discnctdLVBattery

The low voltage (LV) battery is disconnected.

No current flow detected to / from the low voltage (LV) battery for an extended time period.

Loss of support from the low voltage (LV) battery, so the vehicle electrical system is only supported via the power conversion system (PCS). Lead acid only: Some vehicle features may be unavailable due to load shedding. There should be another alert present to indicate this.

VCLEFT_a202_remoteEpbConfigIncompatible

EPB's brake HW config is not compatible remote EPB's brake HW config.

Remote EPB is present and local EPB has learnt brake HW config but is not compatible with remote brake HW config

Remote and local EPB brake HW config is incompatible, parking brake function may be degraded

VCLEFT_a203_hwBrakeTypeMismatch

Electronic Parking Brake's learned configuration does not match the reported config from the gateway.

Electronic Parking Brake HW type does not match HW type reported by gateway and 5 seconds have passed since gateway booted up

Hardware does not match current configuration, parking brake function may be degraded

VCLEFT_a197_freeRollModeAtSpeed

If vehicle reaches 8.8kph, EPB will park.

Vehicle speed of 8.8kph in free roll Mode

EPB is applied.

VCLEFT_a221_hardwareLoadshedTriggered

Hardware loadshed protection is initiated on the Vehicle Controller Left (VCLEFT). Non-critical loads are expected to be unavailable until the protection clears.

The 16V bus reports an undervoltage or overcurrent condition on VCLEFT while the vehicle is in Drive.

Non-critical loads unavailable in Drive.

VCLEFT_a203_epbmOverIStatic

Electronic Parking Brake Monitor measured more current than is required for Electronic Parking Brake to remain in PARKING.

Electronic Parking Brake attempted to remain in PARKING while Electronic Parking Brake Monitor had measured more than the maximum current allowed to remain in PARKING.

Caliper lifetime may be degraded.

VCLEFT_a196_freeRollModeActive

will prevent EPB from parking when the driver leaves.

EPB enters Free Roll Mode from UI request

Car will be free rolling

VCLEFT_a197_VEHCANUndertrminate

the adjustable termination is off when it should be on.

CAN bus termination not set when expected

Vehicle CAN bus may have errors

VCLEFT_a193_radFanMIA

Radiator Fan Controller not responding on LIN.

Radiator Fan Controller not responding on LIN

Radiator Fan Controls will not function

VCLEFT_a194_DCDCNotSupportingLVBus

The low voltage (LV) bus and LV battery are not adequately supported by the power conversion system (PCS).

There is 0.5V or greater difference between the PCS voltage and the LV battery voltage.

The low voltage electrical system cannot continue to power all vehicle features when the LV bus is not adequately supported. It may be necessary to shed some vehicle electrical loads by cutting power to less essential electronic control units (ECUs), and another alert will be present to indicate that condition. Vehicle may be unable to drive or continue driving, with another alert present to indicate that condition.

VCLEFT_a195_parkForDriverIsLeaving

The Electronic Parking Brake (EPB) reports the driver is leaving and parks the vehicle.

The EPB attempted to park due to the driver being detected as leaving.

The EPB will be applied.

VCLEFT_a196_VEHCANOverterminate

the adjustable termination is active when it should be off.

CAN bus termination set when unexpected

Vehicle CAN bus may have errors

VCLEFT_a204_epbmUnderIDyn

The Electronic Parking Brake Monitor (EPBM) measured less current than is required for the Electronic Parking Brake (EPB) to transition to DYNAMIC, which may lead to the brake caliper not having the expected amount of braking force.

The Electronic Parking Brake (EPB) attempted to transition to DYNAMIC before the Electronic Parking Brake Monitor (EPBM) measured the minimum current required to allow the transition.

The brake caliper may not have the expected braking force.

Alerts

Alerts