Component description Pin assignments of control unit plug connector EDC Pin Connection to component (O=Output, I=Input) 24 Not used 25 Not used 26 Not used 27 Pedal value transmitter (signal) – terminal 7 in the terminal box I 28 Engine speed signal output from control unit (square-wave pulses) O 29 Not used 30 Not used 31 Not used 32 Not used 33 Boost pressure sensor (supply) – Pin 2 on the charge-air pressure sensor O 34 Fuel temperature sensor 35 To the EDC operating element with resistors for reduction in the event of external faults 36 Charge-air pressure sensor (Signal) – pin 1 on the charge-air pressure sensor I 37 Not used 38 Not used 39 Pedal value transmitter (idle speed switch) – terminal 8 in the terminal box 40 Not used 41 Not used 42 Not used 43 Request button (brake) – Pin 7 in the EDC operating element I 44 Idle speed adjustment – pin 4 in the EDC operating element 45 Pedal value transmitter (supply) – terminal 6 in the terminal box 46 Relay for voltage supply (main relay) K1 coil O 47 Ignition system ”On”, terminal 15 48 Diagnostic connection (K line) for MAN-Cats 49 Diagnostic connection (L line) for MAN-Cats 50 Input for emergency stop 51 Not used 52 Assigned to batt.+ (to enable multiplex signal) 53 Coolant temperature sensor – Pin 3 on temperature sensor I 54 Not used 55 Boost air temperature sensor – Pin 1 on temperature sensor I 12