Alerts
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| Signal Name | Description | Condition | Impact |
|---|---|---|---|
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Secondary disconnect controller (SDC) failed the drive unit pyro self-test.
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Pyro test voltages were out of range during pyro self-test.
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Pyro disconnect may not function as expected.
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Drive inverter (DI) running-feedback (fdbk) pin to secondary disconnect controller (SDC) is in an irrational state.
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DI UART data is active, but running-feedback pin state is low.
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SDC will not skip pyro self-test (PST) if DI is MIA at startup. Potential overlapping pyro self-tests.
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Secondary disconnect controller (SDC) motor speed estimate is irrational.
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SDC estimated motor speed is too high or too low
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Some SDC functions may be unavailable
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Secondary disconnect controller (SDC) triggered the 2-phase disconnect mechanism.
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SDC detects abnormal electrical condition.
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Drive unit may be permanently disabled after 2-phase disconnect occurs.
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Secondary disconnect controller (SDC) triggered the 2-phase disconnect mechanism.
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SDC detects abnormal electrical condition.
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Drive unit may be permanently disabled after 2-phase disconnect occurs.
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Secondary disconnect controller (SDC) detected abnormal motor currents.
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Detection of abnormal drive unit currents by the SDC when drive inverter (DI) is not switching.
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SDC may trigger the pyro disconnect.
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HVLINK messages are not being received by secondary disconnect controller (SDC).
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At least one message from HVLINK consumed by SDC is not received.
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Active discharge control by SDC may be forced ON.
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Universal asynchronous receiver-transmitter (UART) data version differs between drive inverter (DI) and secondary disconnect controller (SDC).
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UART data version detected as differing between DI and SDC.
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Unable to run pyro self-test.
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Drive inverter (DI) running-feedback (fdbk) pin to secondary disconnect controller (SDC) is in an irrational state.
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DI UART data is active, but running-feedback pin state is low.
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SDC will not skip pyro self-test (PST) if DI is MIA at startup. Potential overlapping pyro self-tests.
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Secondary disconnect controller (SDC) reference voltage (Vref) for current sensor measurement is irrational, making SDC unable to monitor drive unit electrical state.
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SDC reference voltage (Vref) measurement is outside of expected range.
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Pyro disconnect may not function as expected.
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Secondary disconnect controller (SDC) boost rail voltage sensor is providing irrational values.
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SDC boost rail sensor reading is below operational value while HV backup rail voltage measurement (Vbackup) is at nominal value.
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Pyro disconnect may not function as expected.
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Secondary disconnect controller (SDC) HV backup rail voltage sensor is providing irrational values.
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HV backup rail voltage measured low while Power Good (PGOOD) hardware signal to SDC is asserted.
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Pyro disconnect may not function as expected.
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Secondary disconnect controller (SDC) HV bus voltage sensor is providing irrational values.
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HV bus voltage measurement is low while HV backup rail is up.
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Pyro disconnect may not function as expected.
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Steering Column Control Module (SCCM) detected an implausible gear angle
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The difference between the expected gear 1 angle derived from gear 2 angle and actual gear 1 angle is greater than or equal to 7 deg
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SCCM may not operate as expected.
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Secondary disconnect controller (SDC) phase voltage sensors are providing irrational values.
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At least one phase voltage measurement remains low while voltage should be constantly switching between low and high.
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Pyro disconnect may not function as expected.
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Secondary disconnect controller (SDC) failed the drive unit pyro self-test.
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Pyro test voltages were out of range during pyro self-test.
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Pyro disconnect may not function as expected.
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The external analog to digital converter (ADC) is returning invalid data over the serial peripheral interface (SPI).
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Invalid data is received from the external ADC over SPI.
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Phase voltage sensing data is incorrect, which may affect pyro disconnect functionality.
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Secondary disconnect controller (SDC) triggered the 2-phase disconnect mechanism during a previous power ON state. Alert log signal data retrieved from electrically erasable programmable read-only memory (EEPROM) to be used for pyro disconnect trigger investigation afterward.
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SDC reads alert log signal data from EEPROM for a previous pyro disconnect event.
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Drive unit may not be functional due to previous pyro disconnect.
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Secondary disconnect controller (SDC) detected abnormal electrical currents during a previous power-ON state. Data retrieved from electrically erasable programmable read-only memory (EEPROM).
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SDC detected abnormal electrical currents when drive inverter (DI) was not switching as expected during a previous power cycle.
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Drive unit may not be functional due to previous electrical issue.
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The external electrically erasable programmable read-only memory (EEPROM) is returning unexpected data over the serial peripheral interface (SPI).
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Invalid data received from external EEPROM over SPI.
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Analysis of trigger condition for a previous pyro disconnect event cannot be completed because EEPROM data is inaccessible.
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