Brake switch ABS, signal low
â–¶ How to fix
Use SDP3 or Allison diagnostic tool to check the status on ABS which comes via CAN. If a fault is not found on ABS/EBS, contact an Allison dealer.
What you'll see
No driver-visible symptom recorded.
System reaction
The Allison fault code number is: P0719.Control unit may unlock the lock-up.The control unit switches to the basic setting mode, i.e. that ABS is not active.
Diagnostic depth
Detection
The control unit is calibrated to receive the ABS status and detects an acceleration at the same time as the ABS status is active.
Possible cause
There is probably a fault on ABS/EBS or the gearbox control unit.