One or more of the expected CAN messages from the Pneumatic Parking Brake (PPB) were not received.
<0.01% (Extremely rare)
Park Brake Status Unknown - Fan brakes to park
Exiting and re-entering vehicle may restore operation
Vehicle parking brake functionality may be missing.
One or more of the expected CAN messages from the Pneumatic Parking Brake (PPB) were not received.
A message the local ECU expects to receive from the Pneumatic Parking Brake ECU (PPB) hasn't been received within the expected timeout or the drop rate is too high while the PPB is CAN active. The ECU is considered CAN active when VCLEFTS_vehGoToSleep is 0.
All messages the local ECU expects to receive from the Pneumatic Parking Brake ECU (PPB) are being received or the PPB ECU is CAN inactive.
Semitruck
customer
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