SDCR_a004 — Pm Running Fdbk Irrational
Full alert identifier: SDCR_a004_pmRunningFdbkIrrational
Alert description
Drive inverter (DI) running-feedback (fdbk) pin to secondary disconnect controller (SDC) is in an irrational state.
Potential impact
SDC will not skip pyro self-test (PST) if DI is MIA at startup. Potential overlapping pyro self-tests.
Set condition
DI UART data is active, but running-feedback pin state is low.
Clear condition
DI running-feedback pin is set, or universal asynchronous receiver-transmitter (UART) communication stops.
Signals to check
These diagnostic fields are associated with SDCR_a004. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
HV Backup Supply V
SDCR_
|
V |
Boost Rail V
SDCR_
|
V |
Di Present
SDCR_
|
— |
Pm Running Pin
SDCR_
|
— |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of SDCR_a004.