Isuzu N-Series. Manual - part 648

6E-14    Engine Control System (4HK1) 

CKP and CMP Sensors

E

-111

ECM

ECM

0.5

BLU/

WHT

0.5

BLU/

BLK

0.5

BLK

0.5

BLK

0.5

BLK

0.5BLK

E

-111

2

E-1

12

100

1

E-1

12

3

98

99

0.5

ORN

107

2

E-98

106

108

CKP

sensor

low

signal

1

E-98

0.5

YEL

CKP

sensor

high

signal

12V reference

CMP

sensor

signal

Shield ground

Shield ground

N6A6634E

0.5

BLK

0.5

BLK

FRP

Sensor

Boost

Pressure

Sensor

CMP

Sensor

CKP

Sensor

 Engine Control System (4HK1)    6E-15

Injectors

121

1

1

1

2

2

WHT

ECM

ECM

11

6

2

RED

2

WHT

0.75

WHT

0.75

GRN

0.75

GRN/

WHT

0.75 WHT

Cylinder #1

Fuel

Injector

Cylinder #4

Fuel

Injector

Cylinder #3

Fuel

Injector

Cylinder #2

Fuel

Injector

4

4

2

1

2

WHT

0.75

WHT

0.75

BLK

0.75

WHT/

YEL

3

3

1

33

3

2

2

RED

0.75

RED

0.75

YEL

0.75

BLK/

BLU

0.75 RED

2

2

H-125

H-126

2

3

E-138

E-141

E-140

E-139

11

8

1

E-141

E-138

E-140

E-139

2

RED

0.75

RED

0.75

BLU

0.75

BLK

6

6

H-126

H-125

120

7

7

11

7

8

8

11

9

5

5

Cylinder #1

fuel

injector

control

Cylinder #4

fuel

injector

control

Cylinder #3

fuel

injector

control

Cylinder #2

fuel

injector

control

Charge voltage

(Common 1)

Charge voltage

(Common 2)

N6A6638E

6E-16    Engine Control System (4HK1) 

Glow Control System, A/C Control System, PTO Switch

0.5

PNK

0.5

GRN/

ORN

ECM

0.85

GRN/

ORN

0.5

BLU/

ORN

0.5

BLU/

ORN

0.85GRN/ORN

Refrigerator

Compressor

J-6

0.85

GRN/

WHT

0.85

GRN/

WHT

Thermo A/C 

Relay

2

H-5

9

H-105

8

H-4

1

1

J-7

J-6

2

E-5

1

1

J-191

34

44

33

0.75

WHT/

RED

A/C

Pressure

Switch

A/C

Compressor

1

H-120

Glow

Plug

3

BLK/

YEL

3

BLK/

YEL

3

BLK/

BLU

F-9

ENG. (IG)

10A

0.5

BLK/

RED

0.5

YEL/

BLK

0.5 YEL/BLK

0.5

YEL/

BLU

E-3

Ignition Switch

5

2

4

X-20

X-20

3

H-5

18

10

B-84

B-84

1

2

PT

O

Switch

A/C

signal

Refrigerator

switch

signal

Glow plug

relay

control

SBF-3

GLOW

60A

Fuse &

Relay Box

(Glove Box)

Fuse &

Relay Box

(Behind the Cab)

Fuse &

Relay Box

(Behind the Cab)

PTO

switch

signal

0.5

BLK

1.25

BLK

B-1

Frame

W/S-C

+B

N6A6639E

ECM

Glow

Relay

 Engine Control System (4HK1)    6E-17

Clutch Switch, Neutral Switch, Exhaust Brake Switch, Engine Warm Up Switch, Exhaust Brake Solenoid
Valve, Intake Throttle Solenoid Valve

F-28

ECM

10A

Fuse &

Relay Box

(Glove Box)

Fuse &

Relay Box

(Behind the Cab)

6

45

H-5

17

H-4

0.5

LT GRN/

RED

0.5

BRN/

BLK

0.5

LT GRN/

RED

2

102

H-105

0.5

LT GRN/

WHT

50

Neutral

Switch

0.5

LT GRN

0.5

LT GRN

0.5

LT GRN

0.5

LT GRN/

WHT

0.85

LT GRN

0.5

BLK/

BLU

15

J-191

E-111

0.5

BLK

ECM

Intake

throttle

solenoid

valve

control

Exhaust

brake

solenoid

valve

control

Neutral

switch

signal

Exhaust

brake

switch

signal

F-9

ENG. (IG)

10A

0.5

YEL/

BLU

0.5

BRN/

YEL

Clutch

Switch

0.5

BRN/

YEL

Ignition Switch

47

Clutch

switch

signal

1

2

5

4

J/C-2

2

1

J-40

J-40

2

1

J-31

J-31

1

2

J-50

J-50

2

5

B-69

B-69

2

1

B-89

B-89

Intake

Throttle

Solenoid

Valve

Exhaust

Brake

Solenoid

Valve

N6A6640E

TCM

0.5

L

T

 GRN/

BLU

0.5

BLK

3

BLK

0.5

BLK

1.25

BLK

0.5

L

T

 GRN

/BLU

0.5

L

T

 GRN

/BLU

0.5

BRN/

BLK

0.85

L

T

 GRN/

RED

0.85

L

T

 GRN/

RED

0.5

L

T

 GRN/

RED

0.5

L

T

 GRN/

BLU

B-1

Frame

B-7

H/L

Bracket

F-2

FUEL

HEA

TER

10A

Heater Relay

F-7

T

AIL

LIGHT

10A

T

ail Relay

5

Engine

W

arm up

Switch

2

6

3

41

B-31

B-31

7

51

H-4

Engine

warm up

switch

signal

W/S-F

W/S-C

4

9

J/C-D

11

5

J/C-B

Exhaust

Brake

Switch

(Combination

Switch)