Alerts

All stator sensors are giving abnormal measurements

Drive unit enters unit limp mode (see DI_a126_limpMode)

No

Abnormal temperature measurements from stator sensor 1

Stator sensor 2 will be used instead (if available)

No

Stator temperature exceeds upper temperature threshold

No direct impact. Could damage drive unit if temperature is continuously too high.

No

Abnormal temperature measurements from DI coolant outlet sensor

Unable to monitor DI coolant outlet sensor temperature

No

DI coolant outlet temperature (refer to outletTemp) drops below lower temperature threshold

No direct impact. Could damage drive inverter if temperature is continuously too low.

No

DI coolant outlet temperature (refer to outletTemp) exceeds upper temperature threshold

No direct impact. Could damage drive inverter if temperature is continuously too high.

No

The DIx and PM estimate different amounts of torque production, causing a Cross Check mismatch. There may be a condition affecting DIx's or PM's ability to measure torque.

The vehicle may not accurately measure the level of torque being produced by the Drive Unit.

No

The Secondary Disconnect Controller (SDC) is not communicating to the Drive Inverter (DI), or there is a mismatch between their interface version.

The Secondary Disconnect Controller (SDC) may not be monitoring potential drive unit failures.

No

HV bus voltage (refer to busVoltage) exceeds upper voltage theshold (refer to busHighLimit)

Unable to produce torque/power from drive unit

No

The DIx Phase B current sensor is irrational. An irrational current may indicate a high rate of change or current measurement out of sensing bounds. There may be a condition affecting current input and output.

If the alert asserts at the beginning of a drive cycle, DIx may not enable. If the alert asserts during a drive cycle, DIx may be disabled. DIx may not function as expected.

No

The DIx Phase A current sensor is irrational. An irrational current may indicate a high rate of change or current measurement out of sensing bounds. There may be a condition affecting current input and output.

If the alert asserts at the beginning of a drive cycle, DIx may not enable. If the alert asserts during a drive cycle, DIx may be disabled. DIx may not function as expected.

No

LV supply voltage to DI is disconnected or drops below lower voltage threshold.

The DI ECU triggers limp mode (see separate limpMode alerts) and cannot produce torque or power.

No

The PM detects a condition that requires it to intervene and disable powertrain.

Vehicle drive torque is immediately disabled.

No

The DIx power stage has applied a safe state.

Some DIx features may be disabled, or may not function expected. The Drive Unit may not function as expected.

No

The DI ECU detects an uncorrectable flash or RAM error.

This alert is for diagnostic logging purposes only.

No

Bus voltage is high while active discharge is ON

Potentially exposed high voltage

No

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

No

When HV bus is up, DI measured bus voltage very low or disagrees with BMS reported voltage

Drive unit enters unit limp mode (see DI_a126_limpMode), faults (Model 3 only)

No

Imbalanced phase currents detected. See payload signals for reason of trigger

Drive unit enters unit limp mode (see DI_a126_limpMode)

No

Rotor offset mean estimator is above minimum rationality threshold at very low absolute torque outputs

Diagnostic alert data only, may indicate reduction in torque or excess heat accuracy

No