Isuzu N-Series. Service manual — part 739
Engine Control System (4JH1) 6E-7
Starting and Charging System
Refer to
Power Distribution
Refer to
Power Distribution
SBF-2
KEY
50A
30
BLK
3
BLK/
WHT
3
WHT/
BLK
3
WHT/
BLK
E-72
P-6
J-26
3
BLK/
WHT
SBF-8
ST
AR
TER
60A
3
WHT/
BLU
3
WHT/
BLU
P-1
P-2
P-3
P-2
P-5
P-4
Battery
J-9
Frame
2
BLK
0.5
BLK
Starter
Relay
F-22
ST
AR
TER
10A
4
B-67
14
H-8
2
B-67
1
H-7
30BLK
8BLK
2L
Fuse & Relay Box
(Behind the Cab)
Fuse &
Relay Box
(Glove Box)
3
13
H-3
2
P-8
1
P-8
P-9
3
WHT
0.85
WHT/BLU
0.85
WHT/BLU
0.5
WHT/BLU
8
WHT
H-6
SB
Generator
L
ST
ON
ACC
OFF
Ignition
switch
Relay Box
(Instrument
Panel)
5
3
4
X-8
X-8
2
0.5
BLK/
YEL
0.5
BLK/
YEL
4
2
5
3
X-1
1
X-1
1
Charge
Relay
Fuse &
Relay Box
(Glove Box)
F-16
METER
10A
Heater
A/C Relay
W/S-M
Relay Box
(Instrument
Panel)
Starter
B
C
1
J-27
1
M
N6A3864E
6E-8 Engine Control System (4JH1)
ECM Power and PCU
CAN
high
CAN
low
ESO
solenoid
signal
output
12V
Battery
voltage
ECM
main
relay
control
3
BLU/
RED
3
BLU/
RED
0.5
BLU/
BLK
2
BLU/
RED
58
3
B-233
ECM
1
H-6
15
H-14
7
E-1
10
10
5
6
11
100
99
1
2
CAN
high
CAN
low
BA
T
(+)
16
6
2
BLK
2
BLK
0.5
RED
0.5
YEL
0.5
BLU
0.5
YEL
12
7
13
8
105
91
8
H-8
H-14
E-1
10
5
ESO
solenoid
signal
CKP
sensor
signal
J-9
Frame
PCU
CKP
sensor
signal
output
Exhaust Brake
Solenoid V
alve
Intake Throttle
Solenoid V
alve
Neutral Switch
A/C Compressor Relay
A/C Signal Relay
MAF & IA
T
Sensor
Glow Relay
1.25
BLK/
YEL
3
BLK/
YEL
3
BLK/
YEL
ECM
Main
Relay
F-8
ENG.(B1)
15A
Fuse &
Relay Box
(Glove Box)
Relay Box
(Instrument
Panel)
4
5
2
X-14
X-14
1
2BLU/RED
2
RED/
WHT
0.5
PNK
0.5
PNK
0.5
PNK
0.5
ORN
0.5
ORN
0.5
ORN
0.5
BLU
0.5
YEL
F-16
METER
10A
0.5
BLK/
YEL
Meter
39
B-234
Ignition voltage
W/S-M
2
BLU/
RED
F-9
ENG.(B2)
15A
N6A3866E
Engine Control System (4JH1) 6E-9
ECM Grounding, EHCU and DLC
Ground
Ground
2
BLK
3
BLK/
YEL
2
WHT/
BLK
2
WHT/
BLK
0.5
BLK/
YEL
2
BLK
5
BLK
0.5
BLU
0.5
YEL
F-8
ENG.(B1)
15A
ECM
Data
Link
Connector
(DLC)
45
1
B+
2
35
B-234
Keyword
2000
Diagnostic
request
switch
Keyword
2000
6
16
7
B-79
5
5
9
4
B-79
B-7
Headlight Bracket
0.5
BLK
0.5
BLK
0.85
BLK
0.85
BLK
Ground
Ground
EHCU
4
29
J-177
2
12
4
3
H-15
26
27
H-5
0.3
WHT/
BLK
0.3
WHT/
BLK
0.3
WHT/
BLK
0.3
WHT/
GRN
0.3
WHT/
GRN
0.3
WHT/
GRN
J1850
(Class2)
Diagnostic
request
switch
F-9
ENG.(B2)
15A
W/S-C
J/C-E
Fuse & Relay Box
(Glove Box)
Diagnostic
request
switch
Diagnostic
request
switch
B-1
Frame
ECM
Main
Relay
J1850
(Class2)
N6A3867E
6E-10 Engine Control System (4JH1)
Gauges and Warning Lamps
12V
VSS
signal
Exhaust
brake
lamp
control
Glow
indicator
lamp
control
MIL
control
42
43
B-234
68
27
ECM
Instrument
Panel Cluster
(IPC)
MIL
Glow
3
1
J-32
VSS
Engine
speed
signal
output
4
B-51
6
8
0.5
GRN/
YEL
0.5
ORN/
BLU
0.5
BLU/
GRN
0.85
BLK
0.5
YEL/
GRN
0.5
BLK
0.85
BLK
2
BLK
0.5
YEL/
GRN
T
achometer
1
B-55
8
2
J-32
10
Speedometer
0.5
BLK/YEL
F-16
METER
10A
19
H-5
25
31
B-7
Headlight
Bracket
1
B-51
0.5
L
T
GRN/
BLU
Exhaust
Brake
Exhaust
Brake
Switch
60
0.5
GRN/
RED
2
B-52
3
0.5
BLK
0.85
BLK
9
B-1
Frame
0.3
BLK
Fuse & Relay Box
(Glove Box)
0.3
BLK/
YEL
0.3
BLK/
YEL
0.5
YEL/
GRN
N6A3868E
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