Before commissioning This data is evaluated along with data from the sensors on the engine, such as those for i All the information on the control unit type plate is required to obtain a replacement engine control unit. charge-air pressure and temperature 2 coolant temperature fuel temperature oil pressure These parameters are compared with the characteristic diagrams and curves stored in the engine control unit. Start, duration and amount of injection are calculated from the curves and the unit pumps are controlled accordingly via the solenoid valves. Control unit type plate 1 Data record 2 Certification no. 3 Engine number 4 Equipment code 32 General remarks