MyTeslaMate App

Signal Name	Description	Condition	Impact
DIF_a119_hvpMIA	The drive interface (DI) electronic control unit (ECU) detects that the high voltage processor (HVP) controller area network (CAN) node is missing (MIA).	The DI ECU is not receiving the expected CAN communication from the HVP, and considers it irrational or MIA.	The DI ECU is unable to monitor the state of the HVP, and active discharge may turn on.
DIF_a117_diMIA	The Drive Inverter (DIx) node is Missing in Action (MIA) on Controller Area Network (CAN) for one or more messages.	The DIx node is MIA on CAN for one or more messages. The DIx node or DIx may have a condition affecting functionality.	DIx may not be able to communicate with the High Voltage Processor (HVP).
DIF_a121_motorControlRegulation	Drive Inverter Warning: Motor control is out of regulation.	Motor regulation fails to meet command inputs	Drive unit enters unit limp mode (see DI_a126_limpMode)
DIF_a116_highSpeedWearCounter	Drive Inverter Warning: High Speed Wear Counter Exceeded.	Number of qualified high speed events above allowed threshold	Silent alert to track mechanical wear
DIF_a111_badPhaseSensorCalib	The Drive Inverter (DIx) Electrically Erasable Programmable Read-Only Memory (EEPROM) has reported phase sensor calibration is outside valid range.	The DIx EEPROM has reported phase sensor calibration is outside valid range.	This alert is primarily for logging purposes and appears in conjunction with other alerts.
DIF_a110_brakeMIA	The drive interface (DI) electronic control unit (ECU) detects that the electronic parking brake (EPB) controller area network (CAN) node is missing (MIA).	The DI ECU is not receiving the expected CAN communication from the EPB, and considers it irrational or MIA.	The DI ECU is unable to monitor the state of the EPB.
DIF_a109_ahbWriteError	The Drive Interface (DI) processor has detected an internal exception. This alert does not on its own indicate a symptom or root cause.	The DI processor detects an exception.	This alert is primarily informational and is used for logging purposes.
DIF_a108_stateTrans	The Drive Unit is not able to transition to Drive state. There may be a condition preventing the Drive Unit from transitioning states.	The Drive Unit is not able to transition to Drive state. There may be a condition preventing the Drive Unit from transitioning states.	The Drive Unit may not function as expected, including a reduction in vehicle power. The vehicle's drive cycle may not function as expected, or at all.
DIF_a107_fpgaError	The Drive Inverter (DIx) has detected an error communicating with the Field Programmable Gate Array (FPGA).	DIx has detected an error communicating with FPGA. There may be a condition affecting the DIx control board functionality.	The DIx Gate Drive Unit may not be able to receive data from the Pedal Monitor. The vehicle's drive cycle may not function as expected.
DIF_a103_lowFlow	Drive Inverter Warning: Low flow rate of fluid.	Insufficient cooling to the drive inverter is detected	Drive unit enters unit limp mode (see DI_a126_limpMode)
DIF_a098_intTimeTooLong	The Drive Inverter (DIx) has detected a DIx thread executing later than expected. The DIx CPU may be diverting resources towards other tasks.	The DIx has detected a DIx thread executing later than expected. The DIx CPU may be diverting resources towards other tasks.	This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
DIF_a097_eepromError	The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects an electrically erasable programmable read-only memory (EEPROM) read/write access error. Check for other alerts that may be set as a result.	There are read/write issues to EEPROM.	The DI is not able to store any record in EEPROM where the error is located, which impacts functionality on the next boot up.
DIF_a123_lossMotorControl	Drive Inverter Warning: Loss of motor control.	Motors are not responding to DI commands	Unable to produce torque/power from drive unit
DIF_a126_limpMode	Drive Inverter Warning: Unit limp mode triggered.	Abnormal condition detected within drive unit subsystem. Look at limpReason in alert for exact trigger.	Drive system performance severely reduced (torque/power limited)
DIF_a127_gracefulPowerOff	Drive Unit Graceful Power Off (GPO) has been triggered. The Drive Unit will lose current input from the High Voltage (HV) battery.	Drive Unit GPO has been triggered. The Drive Unit will lose current input from the HV battery.	The Drive Unit will ramp down all torque production. The Drive Unit may not function as expected.
DIF_a096_memoryError	The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects a memory check error.	The bootloader cyclic redundancy check (CRC) or application CRC is not expected, or the RAM constants do not match with initialization segment in flash.	The DI processor may reset, and other functionality may be impacted due to memory corruption.
DIF_a092_bmsMIA	The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects that the high voltage (HV) battery management system (BMS) controller area network (CAN) node is missing (MIA).	The DI ECU is not receiving the expected CAN communication from the BMS, and considers it irrational or MIA.	The DI ECU is unable to monitor the state of the BMS.
DIF_a053_unexpectedLatchState	Drive Inverter Warning: Hardware latched fault response in an unexpected state.	Measured latched fault response does NOT match with expected request from DI	In the event of a sudden LV loss at speed, latched fault response may not match expectations, exposing drive unit to unexpected torque
DIF_a091_espMIA	The drive interface (DI) electronic control unit (ECU) detects that the electronic stability program (ESP, also known as traction control) controller area network (CAN) node is missing (MIA).	The DI ECU is not receiving the expected CAN communication from the ESP, and considers it irrational or MIA.	The DI ECU is unable to monitor the state of the ESP.
DIF_a090_pmMIA	The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects that the pedal monitor (PM) controller area network (CAN) node is missing (MIA).	The DI ECU is not receiving the expected CAN communication from the PM, and considers it irrational or MIA.	The DI ECU is unable to monitor the state of the PM.

DIF_a119_hvpMIA

The drive interface (DI) electronic control unit (ECU) detects that the high voltage processor (HVP) controller area network (CAN) node is missing (MIA).

The DI ECU is not receiving the expected CAN communication from the HVP, and considers it irrational or MIA.

The DI ECU is unable to monitor the state of the HVP, and active discharge may turn on.

DIF_a117_diMIA

The Drive Inverter (DIx) node is Missing in Action (MIA) on Controller Area Network (CAN) for one or more messages.

The DIx node is MIA on CAN for one or more messages. The DIx node or DIx may have a condition affecting functionality.

DIx may not be able to communicate with the High Voltage Processor (HVP).

DIF_a121_motorControlRegulation

Drive Inverter Warning: Motor control is out of regulation.

Motor regulation fails to meet command inputs

Drive unit enters unit limp mode (see DI_a126_limpMode)

DIF_a116_highSpeedWearCounter

Drive Inverter Warning: High Speed Wear Counter Exceeded.

Number of qualified high speed events above allowed threshold

Silent alert to track mechanical wear

DIF_a111_badPhaseSensorCalib

The Drive Inverter (DIx) Electrically Erasable Programmable Read-Only Memory (EEPROM) has reported phase sensor calibration is outside valid range.

The DIx EEPROM has reported phase sensor calibration is outside valid range.

This alert is primarily for logging purposes and appears in conjunction with other alerts.

DIF_a110_brakeMIA

The drive interface (DI) electronic control unit (ECU) detects that the electronic parking brake (EPB) controller area network (CAN) node is missing (MIA).

The DI ECU is not receiving the expected CAN communication from the EPB, and considers it irrational or MIA.

The DI ECU is unable to monitor the state of the EPB.

DIF_a109_ahbWriteError

The Drive Interface (DI) processor has detected an internal exception. This alert does not on its own indicate a symptom or root cause.

The DI processor detects an exception.

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

DIF_a108_stateTrans

The Drive Unit is not able to transition to Drive state. There may be a condition preventing the Drive Unit from transitioning states.

The Drive Unit may not function as expected, including a reduction in vehicle power. The vehicle's drive cycle may not function as expected, or at all.

DIF_a107_fpgaError

The Drive Inverter (DIx) has detected an error communicating with the Field Programmable Gate Array (FPGA).

DIx has detected an error communicating with FPGA. There may be a condition affecting the DIx control board functionality.

The DIx Gate Drive Unit may not be able to receive data from the Pedal Monitor. The vehicle's drive cycle may not function as expected.

DIF_a103_lowFlow

Drive Inverter Warning: Low flow rate of fluid.

Insufficient cooling to the drive inverter is detected

Drive unit enters unit limp mode (see DI_a126_limpMode)

DIF_a098_intTimeTooLong

The Drive Inverter (DIx) has detected a DIx thread executing later than expected. The DIx CPU may be diverting resources towards other tasks.

The DIx has detected a DIx thread executing later than expected. The DIx CPU may be diverting resources towards other tasks.

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

DIF_a097_eepromError

The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects an electrically erasable programmable read-only memory (EEPROM) read/write access error. Check for other alerts that may be set as a result.

There are read/write issues to EEPROM.

The DI is not able to store any record in EEPROM where the error is located, which impacts functionality on the next boot up.

DIF_a123_lossMotorControl

Drive Inverter Warning: Loss of motor control.

Motors are not responding to DI commands

Unable to produce torque/power from drive unit

DIF_a126_limpMode

Drive Inverter Warning: Unit limp mode triggered.

Abnormal condition detected within drive unit subsystem. Look at limpReason in alert for exact trigger.

Drive system performance severely reduced (torque/power limited)

DIF_a127_gracefulPowerOff

Drive Unit Graceful Power Off (GPO) has been triggered. The Drive Unit will lose current input from the High Voltage (HV) battery.

Drive Unit GPO has been triggered. The Drive Unit will lose current input from the HV battery.

The Drive Unit will ramp down all torque production. The Drive Unit may not function as expected.

DIF_a096_memoryError

The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects a memory check error.

The bootloader cyclic redundancy check (CRC) or application CRC is not expected, or the RAM constants do not match with initialization segment in flash.

The DI processor may reset, and other functionality may be impacted due to memory corruption.

DIF_a092_bmsMIA

The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects that the high voltage (HV) battery management system (BMS) controller area network (CAN) node is missing (MIA).

The DI ECU is not receiving the expected CAN communication from the BMS, and considers it irrational or MIA.

The DI ECU is unable to monitor the state of the BMS.

DIF_a053_unexpectedLatchState

Drive Inverter Warning: Hardware latched fault response in an unexpected state.

Measured latched fault response does NOT match with expected request from DI

In the event of a sudden LV loss at speed, latched fault response may not match expectations, exposing drive unit to unexpected torque

DIF_a091_espMIA

The drive interface (DI) electronic control unit (ECU) detects that the electronic stability program (ESP, also known as traction control) controller area network (CAN) node is missing (MIA).

The DI ECU is not receiving the expected CAN communication from the ESP, and considers it irrational or MIA.

The DI ECU is unable to monitor the state of the ESP.

DIF_a090_pmMIA

The drive interface (DI) or drive inverter (DIx) electronic control unit (ECU) detects that the pedal monitor (PM) controller area network (CAN) node is missing (MIA).

The DI ECU is not receiving the expected CAN communication from the PM, and considers it irrational or MIA.

The DI ECU is unable to monitor the state of the PM.

Alerts

Alerts