MyTeslaMate App

Signal Name	Description	Condition	Impact
VCREAR_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.
VCREAR_a201_prechargeFailed	The Rear Vehicle Controller (VCREAR) 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.
VCREAR_a206_pcsOvShutdownSelfTestFailure	Power Conversion System (PCS) Overvoltage Shutdown protection has become active on the Rear Vehicle Controller (VCREAR).	Overvoltage condition on 48V bus detected by VCREAR while the vehicle is in drive.	PCS is unavailable due to overvoltage shutdown protection becoming active. Separate LVUnhealthy alert indicating a condition affecting low voltage (LV) electrical system will also be present.
VCREAR_a190_csmApplyDegraded	Electronic Parking Brake apply failed.	Electronic Parking Brake faulted during apply && (nonterminal == TRUE) && (stateRequest != ESM_DYNAMIC)	Electronic Parking Brake may not be applied, and caliper may be obstructed
VCREAR_a208_pcsOvClampTriggered	Power Conversion System (PCS) overvoltage clamp protection has tripped on the Rear Vehicle Controller (VCREAR).	48V bus is reported greater than 56V on VCREAR while the PVS overvoltage clamp protection is armed.	This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
VCREAR_a191_csmReleaseDegraded	Electronic Parking Brake was unable to release fully.	Electronic Parking Brake faulted during release && (nonterminal == TRUE)	Electronic Parking Brake may not be released, and caliper may be obstructed
VCREAR_a176_csmApplyFailed	Electronic Parking Brake apply failed.	Electronic Parking Brake faulted during apply && (nonterminal == FALSE)	Electronic Parking Brake apply in progress will be stopped due to the fault, caliper may not be fully applied
VCREAR_a175_csmReleaseRetry	Electronic Parking Brake release was interrupted. Release will be retried.	(unitFaultStatus == FAULT_STATUS_RETRY) && (csmRequest == release)	Electronic Parking Brake did not release, it will retry a release and enter fault if retry fails
VCREAR_a177_csmApplyRetry	Electronic Parking Brake apply was interrupted. Apply will be retried.	(unitFaultStatus == FAULT_STATUS_RETRY) && (csmRequest == apply) && (stateRequest != ESM_DYNAMIC)	Electronic Parking Brake did not apply, it will retry an apply and enter fault if retry fails
VCREAR_a209_pcsOvClampSelfTestfailure	The Power Conversion System (PCS) Overvoltage (OV) Clamp Protection Circuit self-test is unsuccessful due to circuit voltage readings outside of the normal operating range, which may prevent the circuit from operating as expected.	The PCS OV Clamp Protection Circuit self-test is unsuccessful because the circuit voltage readings are outside of the normal operating range.	The PCS OV Clamp Protection Circuit may not function as expected.
VCREAR_a178_caliperStateUnknown	Electronic Parking Brake was not able to determine caliper state on boot.	Caliper state saved is unknown, corrupted, or mismatches Electronic Parking Brake Monitor	Problem with initializing Electronic Parking Brake
VCREAR_a174_csmReleaseFailed	Electronic Parking Brake was unable to release due to fault.	Electronic Parking Brake faulted during release && (nonterminal == FALSE)	Electronic Parking Brake release in progress will be stopped due to the fault, caliper may not have fully released
VCREAR_a135_NvUv	Motor negative lead voltage is lower than expected while active	The negative lead voltage measurement is lower than expected. The expected value is the lower of 16.5 volts, or the estimated PWM voltage.	Caliper motor or harness may be damaged
VCREAR_a170_12vOv	The battery voltage measurement, nominally 12 volts, was higher than expected.	The vbat voltage measurement is higher than 18.5 volts.	12V Battery or low voltage systems may be damaged
VCREAR_a168_VCDOORRL_MIA	One or more of the messages the vehicle controller receives periodically from the rear left door controller (VCDOORRL) is not received, indicating the VCDOORRL may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCDOORRL within the expected time frame.	Vehicle functions that depend on the VCDOORRL may be unavailable or may not function as expected.
VCREAR_a136_PvOv	Motor positive lead voltage is higher than expected while active	The positive lead voltage measurement is higher than expected. This could be higher than 0.1 voltages if motor is driven in release direction, or higher than estimated PWM voltage if driven in the apply direction.	Caliper motor or harness may be damaged
VCREAR_a167_VCDOORFR_MIA	One or more of the messages the vehicle controller receives periodically from the front right door controller (VCDOORFR) is not received, indicating the VCDOORFR may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCDOORFR within the expected time frame.	Vehicle functions that depend on the VCDOORFR may be unavailable or may not function as expected.
VCREAR_a145_epbRecoveryLimpActivated	Recovery limp mode activated based on user acknowledgment of possible shutdown and limited drive torque / functionality.	User acknowledges limited drive torque and possible shutdown, after steering system has been detected as partially compromised and vehicle has been brought to a stop, and shifts out of Park.	Vehicle speed limited to less than 5 mph. Brakes eventually applied automatically to bring vehicle to a stop.
VCREAR_a137_PvUv	Motor positive lead voltage is lower than expected while active	The positive lead voltage measurement is lower than expected. The expected value is the lower of 16.5 volts, or the estimated PWM voltage.	Caliper motor or harness may be damaged
VCREAR_a139_NvmRedundancyLoss	The Electronic Parking Brake or Electronic Parking Brake Monitor took longer than expected to save caliper state in non-volatile memory.	Caliper state saved to Electronic Parking Brake and Electronic Parking Brake Monitor mismatched for more than 500ms	Non-volatile memory error due to Electronic Parking Brake and Electronic Parking Brake Monitor mismatch

VCREAR_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.

VCREAR_a201_prechargeFailed

The Rear Vehicle Controller (VCREAR) 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.

VCREAR_a206_pcsOvShutdownSelfTestFailure

Power Conversion System (PCS) Overvoltage Shutdown protection has become active on the Rear Vehicle Controller (VCREAR).

Overvoltage condition on 48V bus detected by VCREAR while the vehicle is in drive.

PCS is unavailable due to overvoltage shutdown protection becoming active. Separate LVUnhealthy alert indicating a condition affecting low voltage (LV) electrical system will also be present.

VCREAR_a190_csmApplyDegraded

Electronic Parking Brake apply failed.

Electronic Parking Brake faulted during apply && (nonterminal == TRUE) && (stateRequest != ESM_DYNAMIC)

Electronic Parking Brake may not be applied, and caliper may be obstructed

VCREAR_a208_pcsOvClampTriggered

Power Conversion System (PCS) overvoltage clamp protection has tripped on the Rear Vehicle Controller (VCREAR).

48V bus is reported greater than 56V on VCREAR while the PVS overvoltage clamp protection is armed.

This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.

VCREAR_a191_csmReleaseDegraded

Electronic Parking Brake was unable to release fully.

Electronic Parking Brake faulted during release && (nonterminal == TRUE)

Electronic Parking Brake may not be released, and caliper may be obstructed

VCREAR_a176_csmApplyFailed

Electronic Parking Brake apply failed.

Electronic Parking Brake faulted during apply && (nonterminal == FALSE)

Electronic Parking Brake apply in progress will be stopped due to the fault, caliper may not be fully applied

VCREAR_a175_csmReleaseRetry

Electronic Parking Brake release was interrupted. Release will be retried.

(unitFaultStatus == FAULT_STATUS_RETRY) && (csmRequest == release)

Electronic Parking Brake did not release, it will retry a release and enter fault if retry fails

VCREAR_a177_csmApplyRetry

Electronic Parking Brake apply was interrupted. Apply will be retried.

(unitFaultStatus == FAULT_STATUS_RETRY) && (csmRequest == apply) && (stateRequest != ESM_DYNAMIC)

Electronic Parking Brake did not apply, it will retry an apply and enter fault if retry fails

VCREAR_a209_pcsOvClampSelfTestfailure

The Power Conversion System (PCS) Overvoltage (OV) Clamp Protection Circuit self-test is unsuccessful due to circuit voltage readings outside of the normal operating range, which may prevent the circuit from operating as expected.

The PCS OV Clamp Protection Circuit self-test is unsuccessful because the circuit voltage readings are outside of the normal operating range.

The PCS OV Clamp Protection Circuit may not function as expected.

VCREAR_a178_caliperStateUnknown

Electronic Parking Brake was not able to determine caliper state on boot.

Caliper state saved is unknown, corrupted, or mismatches Electronic Parking Brake Monitor

Problem with initializing Electronic Parking Brake

VCREAR_a174_csmReleaseFailed

Electronic Parking Brake was unable to release due to fault.

Electronic Parking Brake faulted during release && (nonterminal == FALSE)

Electronic Parking Brake release in progress will be stopped due to the fault, caliper may not have fully released

VCREAR_a135_NvUv

Motor negative lead voltage is lower than expected while active

The negative lead voltage measurement is lower than expected. The expected value is the lower of 16.5 volts, or the estimated PWM voltage.

Caliper motor or harness may be damaged

VCREAR_a170_12vOv

The battery voltage measurement, nominally 12 volts, was higher than expected.

The vbat voltage measurement is higher than 18.5 volts.

12V Battery or low voltage systems may be damaged

VCREAR_a168_VCDOORRL_MIA

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

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

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

VCREAR_a136_PvOv

Motor positive lead voltage is higher than expected while active

The positive lead voltage measurement is higher than expected. This could be higher than 0.1 voltages if motor is driven in release direction, or higher than estimated PWM voltage if driven in the apply direction.

Caliper motor or harness may be damaged

VCREAR_a167_VCDOORFR_MIA

One or more of the messages the vehicle controller receives periodically from the front right door controller (VCDOORFR) is not received, indicating the VCDOORFR may be unavailable (MIA).

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

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

VCREAR_a145_epbRecoveryLimpActivated

Recovery limp mode activated based on user acknowledgment of possible shutdown and limited drive torque / functionality.

User acknowledges limited drive torque and possible shutdown, after steering system has been detected as partially compromised and vehicle has been brought to a stop, and shifts out of Park.

Vehicle speed limited to less than 5 mph. Brakes eventually applied automatically to bring vehicle to a stop.

VCREAR_a137_PvUv

Motor positive lead voltage is lower than expected while active

The positive lead voltage measurement is lower than expected. The expected value is the lower of 16.5 volts, or the estimated PWM voltage.

Caliper motor or harness may be damaged

VCREAR_a139_NvmRedundancyLoss

The Electronic Parking Brake or Electronic Parking Brake Monitor took longer than expected to save caliper state in non-volatile memory.

Caliper state saved to Electronic Parking Brake and Electronic Parking Brake Monitor mismatched for more than 500ms

Non-volatile memory error due to Electronic Parking Brake and Electronic Parking Brake Monitor mismatch

Alerts

Alerts