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Mitsubishi L200 Pinout Engine ECU engine 4D56

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CONTROL SYSTEM

Engine-ECU

In accordance with the data input by the sensors, the engine-ECU determines (calculates) optimal control and actuates the output actuators to suit the constantly changing driving conditions.
The engine-ECU consists of a 32-bit microprocessor, random access memory (RAM), read only memory (ROM), and input-output (I/O interface).
It has adopted a rewritable flash-memory ROM in which the control data can be changed or corrected through the use of a special tool. In addition, it has adopted an electrically erasable programmable read only memory (EEPROM) so that the learned correction data will not be deleted even if the battery is disconnected.
ECU Connector Input / Output Pin Arrangement

1
No. 1, 4 injector battery
61
Ground
2
No. 2, 3 injector battery
65
Intake air temperature sensor 2
3
No. 3 injector
70
Intake air temperature sensor 1 ground
4
No. 3 injector
71
Air flow sensor ground
5
No. 2 injector
72
EGR position sensor ground
6
No. 2 injector
73
Manifold absolute pressure sensor ground
11
Engine check lamp
74
Engine coolant temperature sensor ground
13
A/C load signal
75
Sensor ground
15
A/C switch
76
Rail pressure sensor ground
16
4LLc switch <vehicles with high power engine-M/T>
78
Camshaft position sensor ground
17
Suction control valve (positive)
79
Crank angle sensor ground
19
EGR motor (positive)
80
Sensor source
20
EGR motor (negative)
81
Rail pressure sensor power supply
21
Variable geometry control solenoid valve <vehicles with high power engine>
91
Tachometer
22
Ground
92
Ignition switch - IG
23
No. 1 injector
96
Power steering fluid pressure switch
24
No. 1 injector
99
Battery
25
No. 4 injector
100
Battery
26
No. 4 injector
101
Battery (backup with monitor)
28
Glow lamp
102
Fuel filter pressure switch <vehicles for RUSSIA>
29
Glow plug relay
103
Ignition switch - ST
35
PTC heater control signal <vehicles with PTC heater>
104
1st and 2nd rail switch <M/T>
37
Suction control valve (negative)
105
Back-up lamp switch <M/T>
38
PTC heater relay 2 <vehicles with PTC heater>
109
Engine control relay
39
Condenser fan relay
111
Throttle valve control servo (-)
40
A/C relay
112
Accelerator pedal position sensor (sub) power supply
41
PTC heater relay 1 <vehicles with PTC heater>
113
Accelerator pedal position sensor (sub)
49
Intake air temperature sensor 1
114
Accelerator pedal position sensor (sub) ground
50
Air flow sensor
117
CAN interface (high)
51
EGR position sensor
119
Vehicle speed sensor
52
Manifold absolute pressure sensor
120
Accelerator pedal position sensor (main) power supply
53
Engine coolant temperature sensor
121
Accelerator pedal position sensor (main)
54
Fuel temperature sensor
122
Accelerator pedal position sensor (main) ground
56
Rail pressure sensor
124
Throttle position sensor
57
Camshaft position sensor
125
CAN interface (low)
58
Crank angle sensor
128
Ground
59
Camshaft position sensor power supply
130
Throttle valve control servo (+)
60
Crank angle sensor power supply
 
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