Isuzu N-Series. Service manual - part 647

6E-10    Engine Control System (4HK1) 

Idle Up Sensor and PTO Throttle Sensor

ECM

0.5

RED

0.5

BLU

0.5

BLU/

WHT

0.5RED

0.5WHT

0.5

WHT

0.5

RED

0.5

WHT

0.5

BLU/

RED

0.5

PNK/

BLK

0.3

BLK

0.5BLK

0.5

BLK

0.5

BLK

61

64

14

4

13

12

42

63

3

10

11

1

H-4

H-4

60

39

41

20

J-191

B-280

APP

sensor 1

signal

APP

sensor 2

signal

Low reference

Low reference

Shield ground

Shield ground

5V reference 2

ECM

5

B-280

5V reference 1

3

1

APP

Sensor 2

2

6

4

APP

Sensor 1

N6A6657E

J-191

0.5

RED

0.5

BRN

0.5

BLU

0.5

BLU/

YEL

0.5

RED

0.5

PNK/

BLK

0.5

BLU/

RED

0.5

PNK/

BLK

70

66

3

1

1

3

Idle

Up

Sensor

2

2

1

3

PT

O

Throttle

Sensor

2

J-166

B-281

H-4

J-166

B-281

H-4

PT

O

throttle

sensor

signal

Idle up

sensor

signal

0.5

PNK/

BLK

BARO

Sensor

IA

T

Sensor

BARO

Sensor

IA

T

Sensor

0.5

BLK

 Engine Control System (4HK1)    6E-11

APP, IAT and BARO Sensors

ECM

0.5RED

0.5

BLU

0.5

BLU/

WHT

0.5

RED

0.5

WHT

0.5

WHT

0.5

RED

0.5

WHT

0.5

BLU/

RED

0.5

PNK/BLK

0.3

BLK

0.5

BLK

0.5

BLK

0.5

BLK

61

64

14

4

13

12

42

63

3

10

11

1

H-4

H-4

15

H-4

60

39

41

20

J-191

B-280

APP

sensor 1

signal

APP

sensor 2

signal

Low reference

Low reference

Shield ground

Shield ground

5V reference 2

ECM

IA

T

Sensor

2

J-190

1

J-190

5

B-280

71

J-191

0.5

BRN/

GRN

0.5

BRN/

GRN

0.5

RED

0.5

BLK

0.5

BLK

0.5

RED/

GRN

72

IA

T

sensor

signal

5V reference

BARO

sensor

signal

1

B-422

5V reference 1

2

B-422

3

3

1

APP

Sensor 2

2

6

4

APP

Sensor 1

N6A6635E

PT

O

Throttle

Sensor

Idle UP

Sensor

0.5RED

0.5

PNK/BLK

PT

O

Throttle

Sensor

Idle UP

Sensor

BARO

Sensor

6E-12    Engine Control System (4HK1) 

Boost Pressure Sensor, ECT Sensor and FT Sensor

83

E-1

1

1

0.5

L

T

 GRN/

WHT

FT

Sensor

0.5

GRN/

YEL

0.5

L

T

 BLU

0.5

WHT

0.5

RED

0.5

BLK

0.5

BLK

0.5

BLK

0.5

BLK

0.5

BLK

Boost

Pressure

Sensor

ECT

 Gauge

FT

sensor

signal

1

E-93

2

E-93

1

J-216

8

12

H-105

2

J-216

3

4

H-105

3

91

95

108

ECM

ECM

109

E-1

1

1

0.5

RED

0.5

WHT

2

E-90

1

E-90

ECT

Sensor

3

84

ECT

sensor

signal

Boost

pressure

sensor

signal

5V reference

5V reference

Low reference

Shield ground

5V reference 4

N6A6637E

CKP

Sensor

0.5

BLK

 Engine Control System (4HK1)    6E-13

FRP Sensor, FRP Regulator and EGR Valve

N6A6636E

ECM

ECM

0.5

WHT

0.5

WHT

0.5

GRN/

BLU

0.5

BRN

0.5

BLK

2

3

E-1

13

101

1

E-1

13

E

-111

E

-111

90

82

87

FRP

sensor

signal

5V reference 5

Low reference

100

Shield ground

0.5

WHT/

ORN

0.5

GRN/

BLU

0.5

BLK/

ORN

0.5

BRN

0.5

ORN

EGR V

alve

Motor

EGR

Position Sensor

3

1

4

E-94

2

6

E-94

EGR

valve

motor low

side

control

(PWM)

86

111

EGR

valve

motor high

side

control

EGR

valve

position

sensor

signal

+B

103

105

E-1

1

1

0.5

WHT/

RED

FRP

regulator

high side

control

(PWM)

0.5

WHT/

RED

0.5

GRN/

RED

FRP

regulator

feedback

0.5

GRN/

RED

0.5

WHT/

RED

1

E-1

16

2

E-1

16

E

-111

11

3

97

89

0.5

GRN/

RED

FRP

Regulator

+B

CMP

Sensor

FRP

Sensor