Isuzu N-Series. Manual - part 1097

8-100 CAB AND CHASSIS ELECTRICAL

4JH1 Engine (6)

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

CAB AND CHASSIS ELECTRICAL 8-101

4JH1 Engine (7)

Resistor

Engine

warm up

switch

signal

Low

reference

Shield

ground

Low

reference

Engine

warm up

switch

indicator

lamp

control

APP

sensor

signal

Idle

switch

signal

5V reference

ECM

ECM

101

1

2

B-340

B-340

69

24

98

B-233

49

B-234

18

H-5

2

J-183

1

J-183

J-183

3

12

H-5

90

B-233

0.5

RED

0.5

RED

0.5

WHT

0.5

WHT

CKP

Sensor

CKP

sensor

signal

5V reference

38

57

B-234

Idle

Switch

B-1

Frame

0.85

BLK

0.5

BLK/

GRN

0.5

BLK

0.5

GRN/

BLK

0.5

GRN/

ORN

0.5

RED/

GRN

0.5

GRN/

BLK

32

B-80

APP

Sensor

1

B-80

ECM

0.5

BLK

0.5

BLK

24

4

2

0.5

L

T

 GRN/

RED

T

ail

Relay

1

B-31

0.5

BRN

5

B-31

3

6

ECM

Main Relay

46

59

0.5

BLU/

RED

0.3

BLK

0.5

BRN/

RED

0.5

BRN/

RED

Engine

W

arm Up

Switch

W/S-C

ECM

Main Relay

0.5

BRN/

RED

N6A3869E

8-102 CAB AND CHASSIS ELECTRICAL

4JH1 Engine (8)

N6A3870E

Low

reference

Low

reference

MAF

sensor

signal

IA

T

sensor

signal

5V reference

5V reference

ECT

sensor

signal

5V reference

93

B-233

1

J-182

2

4

5

29

H-5

16

H-14

11

H-14

37

H-5

H-8

1

2

0.5

BLK/

PNK

0.5

BLK/

PNK

0.5

BLK/

PNK

92

6

H-8

0.5

BLK/

RED

0.5

BLK/

RED

84

3

J-182

89

B-233

0.5

BLK/

BLU

0.5

BLK/

BLU

16

H-5

0.5

GR

Y

0.5

GR

Y

0.5

GR

Y

ECM

ECM

88

83

0.5

GRN/

RED

0.5

WHT/

RED

0.5

GRN/

RED

0.5

WHT/

RED

0.5

BLU/

RED

MAF & IA

T

Sensor

1

E-16

2

E-16

ECT

Sensor

0.5

BLK/

ORN

0.5

BLK/

ORN

0.5

BLU/

RED

2

1

J-105

J-105

EGR

Solenoid

V

alve

7

H-8

97

EGR

solenoid

valve

control

(PWM)

ECM

Main Relay

CAB AND CHASSIS ELECTRICAL 8-103

4JH1 Engine (9)

A/C

Compressor

A/C ON

signal

relay

signal

Glow

relay

control

A/C

compressor

relay

control

Resistor

1

B-339

2

B-339

0.5

GRN/

YEL

0.5

GRN/

YEL

0.5

GRN/

YEL

0.5

BLK/

RED

0.5

BLK

2

5

X-26

X-26

A/C

Signal

Relay

3

BLK/

RED

0.3

BLK/

RED

5

2

X-20

Glow

Relay

Glow

Plug

0.85

GRN/

YEL

0.85

GRN/

YEL

0.5

WHT/

GRN

0.5

BLK

0.85

BLK

0.5

WHT/

GRN

2

5

X-24

X-24

A/C

Compressor

Relay

16

H-8

3

H-8

H-8

1

H-14

ECM

J-9

Frame

B-1

Frame

41

B-234

33

94

B-233

SBF-3

Glow

60A

4

3

X-20

1

J-122

15

4

1

4

1

Fuse & Relay Box

(Behind the Cab)

F-1

AIR CON

10A

SBF-25

HEATER

30A

0.5

BLU/

RED

0.5

GRN/

ORN

USW

JOINT2

W/S-C

0.5

PNK/

GRN

0.85

GRN/

WHT

1.25

L

T

 GRN/

BLK

0.85

BRN

5

1

4

2

X-10

X-10

A/C

Thermo

Relay

0.5

BLU/

RED

3

H-18

J-6

J-6

12

Pressure

Switch

Diode

Electro

Thermo

4

H-18

0.5BLU/RED

2

BLU

1.25

BLU

ECM

Main Relay

1

H-6

Fuse &

Relay Box

(Glove Box)

Relay Box

(Instrument

 Panel)

EGR Solenoid V

alve

PCU

Exhaust Brake

 Solenoid V

alve

Intake Throttle

 Solenoid V

alve

0.5

BLU /

RED

N6A3871E