SDCR_a001 — Power On Self Test Failed

Full alert identifier: SDCR_a001_powerOnSelfTestFailed

Message shown in the car

Powertrain requires service Vehicle speed and power may be limited

The Secondary Disconnect Controller (SDC) did not pass the drive unit pyro self-test.

Pyro disconnect may not function as expected.

Sets when Pyro test voltages are out of range during pyro self-test.

Clears after a power cycle when the pyro self-test completes successfully.

Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.

Signal	Unit
HV Backup Supply V `SDCR_a001_HVBackupSupplyV`	V
Boost Rail V `SDCR_a001_boostRailV`	V
Expected Pyro V Max `SDCR_a001_expectedPyroV_max`	V
Expected Pyro V Min `SDCR_a001_expectedPyroV_min`	V
Pyro Sense V `SDCR_a001_pyroSenseV`	V

Signal	Unit
From State `SDCR_a001_fromState` 0 PENDING 1 TEST PYRO BOTH OFF1 2 TEST PYRO H ON 3 TEST PYRO BOTH OFF2 4 TEST PYRO L ON 5 PASSED 6 FAILED 7 SKIPPED	—

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of SDCR_a001.