Here is the instructino show you guide on how to solve Scania Truck supply press control unit internal fault in the control unit.
Preparations:
Scania SDP3 2.65.2 Truck Diagnostic Software
Error identification
Regulation of internal supply voltage to the solenoid valves does not work as intended. This has caused supply voltage to be higher than permitted.
Cause
Internal fault in the control unit.
Notes
A yellow warning indication is displayed.
Action
Clear the fault code.
Turn off the power with the starter key.
Wait for 60 seconds.
Switch on the voltage with the starter key.
If the fault code it still active, renew the control unit.