Many thanks for your reply
Please if you could tell me where are the sensors 3b3 , 3b4 because I don't have any schematics of the truck and x13:13 etc are the numbers of the cables on the controller?
Thanks in advance.
If you have any quastion of CROWN trucks please don't hacitate to ask me.

Fault description:
Pressure in pressure accumulator is less than 25 bar

Conditions of occurrence:
Voltage at pressure sensor 3B3 less than 2.2 volts or voltage at pressure sensor 3B4 greater than 3.8 volts

Result:
Charging of pressure accumulator
Speed is reduced for all hydraulic functions
Driving speed is reduced to 7.2 km/h

Possible causes:
Cable connections between pressure sensors (3B3, 3B4) and controller (X13:13, X13:49, X13:44, X13:63) open, shorted or faulty
Pressure sensor defective