Electrical system Service Manual Microcontroller A 2 (MC6) – Control system of the fan reverse at reverse able fans – Reducing the tractive force at excess temperature – Storing service codes The main emergency steering pump control functions are: – Controlling the emergency steering pump check – Controlling the emergency steering pump when the steering pump fails – Storing service codes The main ride control functions are: – Controlling the solenoid valves at the selected speed – Storing service codes The main ride joystick steering control functions are: – Controlling the left and right joystick steering proportional solenoid valves Plug pin assignment < = Inputs > = Outputs Plug MC6 A 55-pin Junior Timer 1 Voltage supply 10A K4-87 / F15 2 Voltage supply K4-87 3 Control electronics ground 4 Unassigned 5 EP1 Variable displacement motor PSV 1 > 6 Solenoid valve Y 6. 1 > 7 Forward travel direction < 8 Forward travel direction < 9 Reverse travel direction < 10 Reverse travel direction < 11 Alternator D+ < 12 Kick-down < 13 Diesel engine speed B24 < 14 Output speed B1 < 15 Variable displacement motor speed 1 B2 < 16 Variable displacement motor speed 2 B2a < 17 Unassigned 18 Angle sensor R5 < 19 Unassigned 20 Unassigned 21 Unassigned 22 Unassigned 23 Angle sensor R1, R5 +5V > 24 Unassigned 25 Ground B24, R1, R5 26 Main electronics “H” CAN-BUS 27 Main electronics “L” CAN-BUS 28 Voltage supply 10A K4-87 / F15 29 Unassigned 30 Control electronics ground 31 Unassigned 32 PSV control pressure Y15 > 33 EP2 Variable displacement motor PSV 2 > 34 Solenoid valve Y 6.2 > 35 Solenoid valve Y 6.3 > 36 Solenoid valve Y Mo1 > 37 Solenoid valve Y3 > 38 Solenoid valve Y2 > 39 RS 232 ground 40 RS 232 TxD 41 Speed sensor (-) B2a 42 RS 232 RxD 43 Output speed sensor (-) B1 44 Variable displacement motor 1 speed sensor (-) B2 45 Unassigned 46 Inch pedal angle sensor R1 < 47 Unassigned 48 Gear oil thermo switch B14 < 49 Unassigned 50 Unassigned 51 Unassigned 52 Control electronics ground 53 Unassigned 54 Unassigned 55 Weight 1 0 . 4 - 2 of 4 L544 - 443 / from 7477 Wednesday, 25.December 2019 10:46 printed this protected document! L544 - L580 2plus2 L554 Serie- 453 4_en_.pdf / from 7477ADMIN MJFCIFSS L564 - 463 / from 7477 L574 - 473 / from 7477 L580 - 458 / from 7477