Ecm Circuit Diagram - Isuzu 4HL1 Workshop Manual

1A-20 Engine Control System
Circuit Diagram

ECM Circuit Diagram

Starter
Switch (ON)
#19
15A
Starter
Switch (ST)
#22
10A
SBF SBF
60A 50A
SBF
60A
SBF SBF SBF
100A 50A 30A
Battery
M+
Intake
Throttle
M
DC Motor
M-
ITP
Sensor
M+
EGR
M
DC Motor
M-
EGR Valve
Position
Sensor
Common Rail
Pressure
Sensor
CKP
Sensor
CMP
Sensor
CHECK ENGINE
Lamp
A/C Condenser
A/C Magnetic
Clutch
Starter
Starter
Cut Relay
Relay
To Starter
Glow
Plug
Glow
Relay
Main Relay
0.75B/O 0.5L
109 90
0.5L/W
84
0.5L/R
94
0.5Y/B
0.5B/Y
99
108
0.5W/L
110
0.75W/R
13
0.5R/B
49
0.5G/W
46
0.5B/W
113
0.5R/G
48
0.5B/R
102
0.85L/B
91
0.85O
83
0.75W/R
80
81
0.75W/R
0.5W/G
98
0.75L
1.25W/R
74
114
1.25W/R
75
115
0.75L
1.25W/R
116
0.5L/Y 1.25W
117
1
0.5L/Y
118
2
1.25L/W
43
0.75G/W
0.75W/G
42
16
ECM
0.75B
0.75R
1.25R
35
4
5
1.25L/R
24
0.5G/Y
0.75W/Y
69
23
0.75L
0.75W/B 0.5SB
88
59
0.75L/Y 0.5GR/W
58 112
0.5Y
68
0.5W 0.5R
63 89
0.5G
97
67
0.5W
66
0.5G
0.5R
64
0.5B
87
0.85B
95
0.5W/R
1.25B
25
119
0.5W/L
1.25B
6
120
1.25B
121
0.5L/R
8
0.5L/W
27
0.5B
26
Idle Position Switch
Cylinder 1 Injector
Cylinder 4 Injector
Cylinder 3 Injector
Cylinder 2 Injector
Scan Tool Communication
DLC
Diagnostic Switch
AP
Sensor
ECT
Sensor
FT
Sensor
IAT
Sensor
SCV
VIM
0.5B
LNW21AXF002601-X