DPB_a309 — DIF Axle Torque Invalid
Full alert identifier: DPB_a309_DIFAxleTorqueInvalid
Alert description
Invalid Drive Inverter Front (DIF) drive torque signal or qualifier (QF) is received.
Potential impact
The Decoupled Power Brake (DPB) may not generate brake torque requested by DI_brakeTorqueCommandFull and instead generate brake torque requested by DI_brakeTorqueCommand. There may be an issue with the transmitting Electronic Control Unit (ECU).
Set condition
The Decoupled Power Brake (DPB) receives either the DIF_torqueActual Controller Area Network (CAN) signal as Signal Not Available (SNA) or the DIF_axleTorqueQF CAN signal as INVALID or FAULTED for longer than 100 milliseconds.
Clear condition
Valid DIF_torqueActual and DIF_axleTorqueQF are received for 100 milliseconds.
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of DPB_a309.