CONTROL UNIT



ENGINE-ECU




Engine-ECU is installed on the lower side of the left door front pillar.
Engine-ECU judges (calculates) the optimum control to deal with the constant minute changes in driving conditions based on information input from the sensors and drives the actuator.
Engine-ECU is composed of 32-bit microprocessor and Random Access Memory (RAM), Read Only Memory (ROM) and Input /Output interface.
Engine-ECU uses flash-memory ROM that allows re-writing of data so that change and correction of control data is possible using special tools. It also uses Electrically Erasable Programmable Read Only Memory (EEPROM) so that studied correction data is not deleted even if battery terminals are disconnected.

ENGINE-ECU CONNECTOR INPUT / OUTPUT PIN ARRANGEMENT




1
Power supply voltage applied to No. 1, No. 4 injector
2
Power supply voltage applied to No. 2, No. 3 injector
3
No. 3 injector
4
No. 3 injector
5
No. 2 injector
6
No. 2 injector
11
Engine warning lamp
13
A/C load signal
15
A/C switch
16
4LLc switch <Vehicles for Australia and New Zealand-M/T>
17
Suction control valve (+)
19
Exhaust gas recirculation motor (+)
20
Exhaust gas recirculation motor (-)
21
Variable geometry control solenoid valve <Vehicles for Australia and New Zealand>
22
Engine-ECU earth
23
No. 1 injector
24
No. 1 injector
25
No. 4 injector
26
No. 4 injector
28
Glow indicator lamp
29
Glow plug relay
37
Suction control valve (-)
39
Condenser fan relay
40
A/C compressor relay
49
No. 1 intake air temperature sensor
50
Air flow sensor
51
Exhaust gas recirculation valve position sensor
52
Manifold absolute pressure sensor
53
Engine coolant temperature sensor
54
Fuel temperature sensor
56
Rail pressure sensor
57
Camshaft position sensor
58
Crank angle sensor
59
Power supply voltage applied to camshaft position sensor
60
Power supply voltage applied to crank angle sensor
61
Engine-ECU earth
65
No. 2 intake air temperature sensor
70
No. 1 intake air temperature sensor earth
71
Air flow sensor earth
72
Sensor earth
73
Manifold absolute pressure sensor earth
74
Engine coolant temperature sensor earth
75
Sensor earth
76
Rail pressure sensor earth
78
Camshaft position sensor earth
79
Crank angle sensor earth
80
Sensor supplied voltage
81
Power supply voltage applied to rail pressure sensor
91
Tachometer
92
Ignition switch-IG
96
Power steering fluid pressure switch
99
Power supply
100
Power supply
101
Backup power supply
102
Fuel filter pressure switch <Vehicles for General Export>
103
Ignition switch-ST
104
1st and 2nd rail switch <M/T>
105
Back-up lamp switch <M/T>
109
Engine control relay
111
Throttle valve control servo (-)
112
Power supply voltage applied to accelerator pedal position sensor (sub)
113
Accelerator pedal position sensor (sub)
114
Accelerator pedal position sensor (sub) earth
117
CAN interface (high)
119
Vehicle speed signal (from A/T-ECU)
120
Power supply voltage applied to accelerator pedal position sensor (main)
121
Accelerator pedal position sensor (main)
122
Accelerator pedal position sensor (main) earth
124
Throttle position sensor
125
CAN interface (low)
128
Sensor earth
130
Throttle valve control servo (+)





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